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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Collections.Immutable;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.CodeActions;
using Microsoft.CodeAnalysis.CodeRefactorings;
using Microsoft.CodeAnalysis.CodeStyle;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.CodeStyle;
using Microsoft.CodeAnalysis.CSharp.Test.Utilities;
using Microsoft.CodeAnalysis.Editor.UnitTests.CodeActions;
using Microsoft.CodeAnalysis.IntroduceVariable;
using Microsoft.CodeAnalysis.Test.Utilities;
using Roslyn.Test.Utilities;
using Xunit;
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.CodeRefactorings.IntroduceVariable
{
[Trait(Traits.Feature, Traits.Features.CodeActionsIntroduceVariable)]
public class IntroduceVariableTests : AbstractCSharpCodeActionTest
{
protected override CodeRefactoringProvider CreateCodeRefactoringProvider(Workspace workspace, TestParameters parameters)
=> new IntroduceVariableCodeRefactoringProvider();
protected override ImmutableArray<CodeAction> MassageActions(ImmutableArray<CodeAction> actions)
=> GetNestedActions(actions);
private readonly CodeStyleOption2<bool> onWithInfo = new CodeStyleOption2<bool>(true, NotificationOption2.Suggestion);
// specify all options explicitly to override defaults.
private OptionsCollection ImplicitTypingEverywhere()
=> new(GetLanguage())
{
{ CSharpCodeStyleOptions.VarElsewhere, onWithInfo },
{ CSharpCodeStyleOptions.VarWhenTypeIsApparent, onWithInfo },
{ CSharpCodeStyleOptions.VarForBuiltInTypes, onWithInfo },
};
// Workaround to mimic awaitable `ValueTask` type from the runtime
private const string ValueTaskDeclaration = """
namespace System.Runtime.CompilerServices
{
public class AsyncMethodBuilderAttribute : System.Attribute { }
}
namespace System.Threading.Tasks
{
[System.Runtime.CompilerServices.AsyncMethodBuilder]
public struct ValueTask { }
}
""";
[Fact]
public async Task TestEmptySpan1()
{
await TestInRegularAndScriptAsync(
"""
using System;
class C
{
void M(Action action)
{
M(() [||]=> { });
}
}
""",
"""
using System;
class C
{
void M(Action action)
{
Action {|Rename:action1|} = () => { };
M(action1);
}
}
""");
}
[Fact]
public async Task TestEmptySpan2()
{
await TestInRegularAndScriptAsync(
"""
using System;
class C
{
void M(int a, int b)
{
var x = a [||]+ b + 3;
}
}
""",
"""
using System;
class C
{
void M(int a, int b)
{
int {|Rename:v|} = a + b;
var x = v + 3;
}
}
""");
}
[Fact]
public async Task TestEmptySpan3()
{
await TestMissingAsync(
"""
using System;
class C
{
void M(int a)
{
var x = [||]a;
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/35525")]
public async Task TestEmptySpan4()
{
await TestInRegularAndScriptAsync(
"""
using System;
class C
{
void M(Action action)
{
M(() => { var x [||]= y; });
}
}
""",
"""
using System;
class C
{
void M(Action action)
{
Action {|Rename:value|} = () => { var x[||] = y; };
M(value);
}
}
""");
}
[Fact]
public async Task TestMethodFix1()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void Goo()
{
Bar([|1 + 1|]);
Bar(1 + 1);
}
}
""",
"""
class C
{
void Goo()
{
const int {|Rename:V|} = 1 + 1;
Bar(V);
Bar(1 + 1);
}
}
""",
index: 2);
}
[Fact]
public async Task TestMethodFix2()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void Goo()
{
Bar([|1 + 1|]);
Bar(1 + 1);
}
}
""",
"""
class C
{
void Goo()
{
const int {|Rename:V|} = 1 + 1;
Bar(V);
Bar(V);
}
}
""",
index: 3);
}
[Fact]
public async Task TestMethodFix3()
{
var code =
"""
class C
{
void Goo()
{
Bar(([|1 + 1|]));
Bar((1 + 1));
}
}
""";
var expected =
"""
class C
{
void Goo()
{
const int {|Rename:V|} = 1 + 1;
Bar(V);
Bar((1 + 1));
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact]
public async Task TestMethodFix4()
{
var code =
"""
class C
{
void Goo()
{
Bar(([|1 + 1|]));
Bar((1 + 1));
}
}
""";
var expected =
"""
class C
{
void Goo()
{
const int {|Rename:V|} = 1 + 1;
Bar(V);
Bar(V);
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 3);
}
[Fact]
public async Task TestThrowExpression()
{
var code =
"""
class C
{
void M(bool b)
{
var x = b ? 1 : [|throw null|];
}
}
""";
await TestActionCountAsync(code, count: 0);
}
[Fact]
public async Task TestThrowExpression2()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void M(bool b)
{
var x = [|b ? 1 : throw null|];
}
}
""",
"""
class C
{
void M(bool b)
{
int {|Rename:v|} = b ? 1 : throw null;
var x = v;
}
}
""",
index: 1);
}
[Fact]
public async Task TestThrowStatement()
{
var code =
"""
class C
{
void M()
{
[|throw null|];
}
}
""";
await TestActionCountAsync(code, count: 0);
}
[Fact]
public async Task TestFieldFix1()
{
var code =
"""
class C
{
int i = ([|1 + 1|]) + (1 + 1);
}
""";
var expected =
"""
class C
{
private const int {|Rename:V|} = 1 + 1;
int i = V + (1 + 1);
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task TestFieldFix2()
{
var code =
"""
class C
{
int i = ([|1 + 1|]) + (1 + 1);
}
""";
var expected =
"""
class C
{
private const int {|Rename:V|} = 1 + 1;
int i = V + V;
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/21747")]
public async Task TestTriviaFieldFix1()
{
var code =
"""
class C
{
int i = (/* CommentLeading */ [|1 + 1|] /* CommentTrailing */) + (1 + 1);
}
""";
var expected =
"""
class C
{
private const int {|Rename:V|} = 1 + 1;
int i = /* CommentLeading */ V /* CommentTrailing */ + V;
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/21747")]
public async Task TestTriviaFieldFix2()
{
var code =
"""
class C
{
int i = (/* CommentLeading */ [|1 + /*CommentEmbedded*/ 1|] /* CommentTrailing */) + (1 + 1);
}
""";
var expected =
"""
class C
{
private const int {|Rename:V|} = 1 + /*CommentEmbedded*/ 1;
int i = /* CommentLeading */ V /* CommentTrailing */ + V;
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1);
}
[Fact]
public async Task TestConstFieldFix1()
{
var code =
"""
class C
{
const int i = ([|1 + 1|]) + (1 + 1);
}
""";
var expected =
"""
class C
{
private const int {|Rename:V|} = 1 + 1;
const int i = V + (1 + 1);
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task TestConstFieldFix2()
{
var code =
"""
class C
{
const int i = ([|1 + 1|]) + (1 + 1);
}
""";
var expected =
"""
class C
{
private const int {|Rename:V|} = 1 + 1;
const int i = V + V;
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1);
}
[Fact]
public async Task TestConstructorFix1()
{
await TestInRegularAndScriptAsync(
"""
class C
{
public C() : this([|1 + 1|], 1 + 1)
{
}
}
""",
"""
class C
{
private const int {|Rename:V|} = 1 + 1;
public C() : this(V, 1 + 1)
{
}
}
""",
index: 0);
}
[Fact]
public async Task TestConstructorFix2()
{
await TestInRegularAndScriptAsync(
"""
class C
{
public C() : this([|1 + 1|], 1 + 1)
{
}
}
""",
"""
class C
{
private const int {|Rename:V|} = 1 + 1;
public C() : this(V, V)
{
}
}
""",
index: 1);
}
[Fact]
public async Task TestParameterFix1()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void Bar(int i = [|1 + 1|], int j = 1 + 1)
{
}
}
""",
"""
class C
{
private const int {|Rename:V|} = 1 + 1;
void Bar(int i = V, int j = 1 + 1)
{
}
}
""",
index: 0);
}
[Fact]
public async Task TestParameterFix2()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void Bar(int i = [|1 + 1|], int j = 1 + 1)
{
}
}
""",
"""
class C
{
private const int {|Rename:V|} = 1 + 1;
void Bar(int i = V, int j = V)
{
}
}
""",
index: 1);
}
[Fact]
public async Task TestAttributeFix1()
{
await TestInRegularAndScriptAsync(
"""
class C
{
[Goo([|1 + 1|], 1 + 1)]
void Bar()
{
}
}
""",
"""
class C
{
private const int {|Rename:V|} = 1 + 1;
[Goo(V, 1 + 1)]
void Bar()
{
}
}
""",
index: 0);
}
[Fact]
public async Task TestAttributeFix2()
{
await TestInRegularAndScriptAsync(
"""
class C
{
[Goo([|1 + 1|], 1 + 1)]
void Bar()
{
}
}
""",
"""
class C
{
private const int {|Rename:V|} = 1 + 1;
[Goo(V, V)]
void Bar()
{
}
}
""",
index: 1);
}
[Fact]
public async Task TestMethodFixExistingName1()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void Goo()
{
int V = 0;
Bar([|1 + 1|]);
Bar(1 + 1);
}
}
""",
"""
class C
{
void Goo()
{
int V = 0;
const int {|Rename:V1|} = 1 + 1;
Bar(V1);
Bar(1 + 1);
}
}
""",
index: 2);
}
[Fact]
public async Task TestFieldExistingName1()
{
var code =
"""
class C
{
int V;
int V1;
int i = ([|1 + 1|]) + (1 + 1);
}
""";
var expected =
"""
class C
{
private const int {|Rename:V2|} = 1 + 1;
int V;
int V1;
int i = V2 + (1 + 1);
}
""";
await TestInRegularAndScriptAsync(
code,
expected,
index: 0);
}
[Fact]
public async Task TestMethodFixComplexName1()
{
await TestInRegularAndScriptAsync(
"""
class C
{
static int Baz;
void Goo()
{
Bar([|C.Baz|]);
Bar(1 + 1);
}
}
""",
"""
class C
{
static int Baz;
void Goo()
{
var {|Rename:baz|} = C.Baz;
Bar(baz);
Bar(1 + 1);
}
}
""",
index: 0,
options: ImplicitTypingEverywhere());
}
[Fact]
public async Task TestMethodFixComplexName1NotVar()
{
await TestInRegularAndScriptAsync(
"""
class C
{
static int Baz;
void Goo()
{
Bar([|C.Baz|]);
Bar(1 + 1);
}
}
""",
"""
class C
{
static int Baz;
void Goo()
{
int {|Rename:baz|} = C.Baz;
Bar(baz);
Bar(1 + 1);
}
}
""",
index: 0);
}
[Fact]
public async Task TestNameConflict1()
{
await TestInRegularAndScriptAsync(
"""
class C
{
public C(int V) : this([|1 + 1|])
{
}
}
""",
"""
class C
{
private const int {|Rename:V|} = 1 + 1;
public C(int V) : this(C.V)
{
}
}
""",
index: 0);
}
[Fact]
public async Task TestNameConflict2()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
private static int v = 5;
static void Main(string[] args)
{
Func<int, int> d = (x) => {
return [|x * v|];
};
d.Invoke(v);
}
}
""",
"""
using System;
class Program
{
private static int v = 5;
static void Main(string[] args)
{
Func<int, int> d = (x) => {
var {|Rename:v1|} = x * v;
return v1;
};
d.Invoke(v);
}
}
""",
options: ImplicitTypingEverywhere());
}
[Fact]
public async Task TestNameConflict2NotVar()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
private static int v = 5;
static void Main(string[] args)
{
Func<int, int> d = (x) => {
return [|x * v|];
};
d.Invoke(v);
}
}
""",
"""
using System;
class Program
{
private static int v = 5;
static void Main(string[] args)
{
Func<int, int> d = (x) => {
int {|Rename:v1|} = x * v;
return v1;
};
d.Invoke(v);
}
}
""");
}
[Fact]
public async Task TestNameVerbatimIdentifier1()
{
await TestInRegularAndScriptAsync(
"""
static class G<T>
{
public class @class
{
}
public static void Add(object @class)
{
}
}
class Program
{
static void Main()
{
G<int>.Add([|new G<int>.@class()|]);
}
}
""",
"""
static class G<T>
{
public class @class
{
}
public static void Add(object @class)
{
}
}
class Program
{
static void Main()
{
var {|Rename:@class|} = new G<int>.@class();
G<int>.Add(@class);
}
}
""",
options: ImplicitTypingEverywhere());
}
[Fact]
public async Task TestNameVerbatimIdentifier1NoVar()
{
await TestInRegularAndScriptAsync(
"""
static class G<T>
{
public class @class
{
}
public static void Add(object @class)
{
}
}
class Program
{
static void Main()
{
G<int>.Add([|new G<int>.@class()|]);
}
}
""",
"""
static class G<T>
{
public class @class
{
}
public static void Add(object @class)
{
}
}
class Program
{
static void Main()
{
G<int>.@class {|Rename:@class|} = new G<int>.@class();
G<int>.Add(@class);
}
}
""");
}
[Fact]
public async Task TestNameVerbatimIdentifier2()
{
await TestInRegularAndScriptAsync(
"""
static class G<T>
{
public class @class
{
}
public static void Add(object @class)
{
}
static void Main()
{
G<int>.Add([|new G<int>.@class()|]);
}
}
""",
"""
static class G<T>
{
public class @class
{
}
public static void Add(object @class)
{
}
static void Main()
{
var {|Rename:@class|} = new G<int>.@class();
G<int>.Add(@class);
}
}
""",
options: ImplicitTypingEverywhere());
}
[Fact]
public async Task TestNameVerbatimIdentifier2NoVar()
{
await TestInRegularAndScriptAsync(
"""
static class G<T>
{
public class @class
{
}
public static void Add(object @class)
{
}
static void Main()
{
G<int>.Add([|new G<int>.@class()|]);
}
}
""",
"""
static class G<T>
{
public class @class
{
}
public static void Add(object @class)
{
}
static void Main()
{
G<int>.@class {|Rename:@class|} = new G<int>.@class();
G<int>.Add(@class);
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/540078")]
public async Task TestConstantField1()
{
await TestInRegularAndScriptAsync(
"""
class C
{
int[] array = new int[[|10|]];
}
""",
"""
class C
{
private const int {|Rename:V|} = 10;
int[] array = new int[V];
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/540079")]
public async Task TestFormattingOfReplacedExpression1()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void M()
{
int i = [|1 + 2|] + 3;
}
}
""",
"""
class C
{
void M()
{
const int {|Rename:V|} = 1 + 2;
int i = V + 3;
}
}
""",
index: 2);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/540468")]
public async Task TestCantExtractMethodTypeParameterToField()
{
await TestInRegularAndScriptAsync(
"""
using System;
using System.Collections.Generic;
using System.Linq;
class Program
{
static void Main<T>(string[] args)
{
Goo([|(T)2.ToString()|]);
}
}
""",
"""
using System;
using System.Collections.Generic;
using System.Linq;
class Program
{
static void Main<T>(string[] args)
{
var {|Rename:t|} = (T)2.ToString();
Goo(t);
}
}
""",
options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/540468")]
public async Task TestCantExtractMethodTypeParameterToFieldCount()
{
await TestActionCountAsync(
"""
using System;
using System.Collections.Generic;
using System.Linq;
class Program
{
static void Main<T>(string[] args)
{
Goo([|(T)2.ToString()|]);
}
}
""",
count: 2);
}
[WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/552389")]
[WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/540482")]
[WpfFact(Skip = "552389")]
public async Task TestConstantForFixedBufferInitializer()
{
await TestInRegularAndScriptAsync(
"""
unsafe struct S
{
fixed int buffer[[|10|]];
}
""",
"""
unsafe struct S
{
private const int p = 10;
fixed int buffer[p];
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/540486")]
public async Task TestFormattingOfIntroduceLocal()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void M()
{
int i = [|1 + 2|] + 3;
}
}
""",
"""
class C
{
void M()
{
const int {|Rename:V|} = 1 + 2;
int i = V + 3;
}
}
""",
index: 2);
}
[Fact]
public async Task TestLocalConstant()
{
await TestInRegularAndScriptAsync(
"""
class Program
{
static void Main(string[] args)
{
const int i = [|1|] + 1;
}
}
""",
"""
class Program
{
static void Main(string[] args)
{
const int {|Rename:V|} = 1;
const int i = V + 1;
}
}
""",
index: 2);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/542699")]
public async Task TestFieldConstant()
{
await TestInRegularAndScriptAsync(
"""
[Goo(2 + 3 + 4)]
class Program
{
int x = [|2 + 3|] + 4;
}
internal class GooAttribute : System.Attribute
{
public GooAttribute(int x)
{
}
}
""",
"""
[Goo(V + 4)]
class Program
{
private const int {|Rename:V|} = 2 + 3;
int x = V + 4;
}
internal class GooAttribute : System.Attribute
{
public GooAttribute(int x)
{
}
}
""",
index: 1);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/542781")]
public async Task TestMissingOnExpressionStatement()
{
await TestMissingInRegularAndScriptAsync(
"""
class Program
{
static void Main(string[] args)
{
int i;
[|i = 2|];
i = 3;
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/542780")]
public async Task TestSingleQueryClause()
{
await TestInRegularAndScriptAsync(
"""
using System.Linq;
class Program
{
void Main()
{
var query = from i in new int[] { 1 }
from j in new int[] { 2 }
select [|i + j|];
}
}
""",
"""
using System.Linq;
class Program
{
void Main()
{
var query = from i in new int[] { 1 }
from j in new int[] { 2 }
let {|Rename:v|} = i + j
select v;
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/542780")]
public async Task TestSingleQuerySelectOrGroupByClause()
{
await TestInRegularAndScriptAsync(
"""
using System.Linq;
class Program
{
void Main()
{
var query = from i in new int[] { 1 }
from j in new int[] { 2 }
where [|i + j|] > 5
select i + j;
}
}
""",
"""
using System.Linq;
class Program
{
void Main()
{
var query = from i in new int[] { 1 }
from j in new int[] { 2 }
let {|Rename:v|} = i + j
where v > 5
select i + j;
}
}
""");
}
[Fact]
public async Task TestLinqQuery()
{
await TestInRegularAndScriptAsync(
"""
using System.Linq;
class Program
{
void Main()
{
var query = from i in new int[] { 1 }
from j in new int[] { 2 }
where [|i + j|] > 5
let x = j + i
select i + j;
}
}
""",
"""
using System.Linq;
class Program
{
void Main()
{
var query = from i in new int[] { 1 }
from j in new int[] { 2 }
let {|Rename:v|} = i + j
where v > 5
let x = j + i
select v;
}
}
""",
index: 1);
}
[Fact]
public async Task TestSingleQueryReplaceAll()
{
await TestInRegularAndScriptAsync(
"""
using System.Linq;
class Program
{
void Main()
{
var query = from i in new int[] { 1 }
from j in new int[] { 2 }
where i + j > 5
let x = j + i
select [|i + j|];
}
}
""",
"""
using System.Linq;
class Program
{
void Main()
{
var query = from i in new int[] { 1 }
from j in new int[] { 2 }
let {|Rename:v|} = i + j
where v > 5
let x = j + i
select v;
}
}
""",
index: 1);
}
[Fact]
public async Task TestNestedQueryReplaceOne1()
{
await TestInRegularAndScriptAsync(
"""
using System.Linq;
class Program
{
void Main()
{
var query = from i in new int[] { 1 }
from j in new int[] { 2 }
where i > (from k in new int[] { 3 }
select [|i + j|]).Max()
where j > (from m in new int[] { 4 }
select i + j).Max()
let x = j + i
select i + j;
}
}
""",
"""
using System.Linq;
class Program
{
void Main()
{
var query = from i in new int[] { 1 }
from j in new int[] { 2 }
where i > (from k in new int[] { 3 }
let {|Rename:v|} = i + j
select v).Max()
where j > (from m in new int[] { 4 }
select i + j).Max()
let x = j + i
select i + j;
}
}
""");
}
[Fact]
public async Task TestNestedQueryReplaceAll1()
{
await TestInRegularAndScriptAsync(
"""
using System.Linq;
class Program
{
void Main()
{
var query = from i in new int[] { 1 }
from j in new int[] { 2 }
where i > (from k in new int[] { 3 }
select [|i + j|]).Max()
where j > (from m in new int[] { 4 }
select i + j).Max()
let x = j + i
select i + j;
}
}
""",
"""
using System.Linq;
class Program
{
void Main()
{
var query = from i in new int[] { 1 }
from j in new int[] { 2 }
let {|Rename:v|} = i + j
where i > (from k in new int[] { 3 }
select v).Max()
where j > (from m in new int[] { 4 }
select v).Max()
let x = j + i
select v;
}
}
""",
index: 1);
}
[Fact]
public async Task TestNestedQueryReplaceOne2()
{
await TestInRegularAndScriptAsync(
"""
using System.Linq;
class Program
{
void Main()
{
var query = from i in new int[] { 1 }
from j in new int[] { 2 }
where i > (from k in new int[] { 3 }
select i + j).Max()
where j > (from m in new int[] { 4 }
select [|i + j|]).Max()
let x = j + i
select i + j;
}
}
""",
"""
using System.Linq;
class Program
{
void Main()
{
var query = from i in new int[] { 1 }
from j in new int[] { 2 }
where i > (from k in new int[] { 3 }
select i + j).Max()
where j > (from m in new int[] { 4 }
let {|Rename:v|} = i + j
select v).Max()
let x = j + i
select i + j;
}
}
""");
}
[Fact]
public async Task TestNestedQueryReplaceAll2()
{
await TestInRegularAndScriptAsync(
"""
using System.Linq;
class Program
{
void Main()
{
var query = from i in new int[] { 1 }
from j in new int[] { 2 }
where i > (from k in new int[] { 3 }
select i + j).Max()
where j > (from m in new int[] { 4 }
select [|i + j|]).Max()
let x = j + i
select i + j;
}
}
""",
"""
using System.Linq;
class Program
{
void Main()
{
var query = from i in new int[] { 1 }
from j in new int[] { 2 }
let {|Rename:v|} = i + j
where i > (from k in new int[] { 3 }
select v).Max()
where j > (from m in new int[] { 4 }
select v).Max()
let x = j + i
select v;
}
}
""",
index: 1);
}
[Fact, WorkItem(10742, "DevDiv_Projects/Roslyn")]
public async Task TestAnonymousTypeMemberAssignment()
{
await TestMissingInRegularAndScriptAsync(
"""
class C
{
void M()
{
var a = new { [|A = 0|] };
}
}
""");
}
[Fact, WorkItem(10743, "DevDiv_Projects/Roslyn")]
public async Task TestAnonymousTypeBody()
{
await TestInRegularAndScriptAsync(
"""
class Program
{
void Main()
{
var a = new [|{ A = 0 }|];
}
}
""",
"""
class Program
{
void Main()
{
var {|Rename:value|} = new { A = 0 };
var a = value;
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/543477")]
public async Task TestImplicitlyTypedArraysUsedInCheckedExpression()
{
await TestInRegularAndScriptAsync(
"""
class Program
{
static void Main(string[] args)
{
int[] a = null;
int[] temp = checked([|a = new[] { 1, 2, 3 }|]);
}
}
""",
"""
class Program
{
static void Main(string[] args)
{
int[] a = null;
var {|Rename:ints|} = a = new[] { 1, 2, 3 };
int[] temp = checked(ints);
}
}
""",
options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/543832")]
public async Task TestMissingOnGenericTypeParameter()
{
await TestMissingInRegularAndScriptAsync(
"""
class C
{
void M()
{
F<[|int?|], int?>(3);
}
R F<T, R>(T arg1)
{
return default(R);
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/543941")]
public async Task TestAnonymousType1()
{
await TestInRegularAndScriptAsync(
"""
class Program
{
void Main()
{
WriteLine([|new { X = 1 }|]);
}
}
""",
"""
class Program
{
void Main()
{
var {|Rename:value|} = new { X = 1 };
WriteLine(value);
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544099")]
public async Task TestMissingOnAttributeNameEquals()
{
await TestMissingInRegularAndScriptAsync(
"""
using System;
using System.Runtime.InteropServices;
class M
{
[DllImport("user32.dll", [|CharSet|] = CharSet.Auto)]
public static extern IntPtr FindWindow(string className, string windowTitle);
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544162")]
public async Task TestMissingOnRightOfDot()
{
await TestMissingInRegularAndScriptAsync(
"""
using System;
using System.Runtime.InteropServices;
class M
{
[DllImport("user32.dll", CharSet = CharSet.[|Auto|])]
public static extern IntPtr FindWindow(string className, string windowTitle);
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544209")]
public async Task TestMissingOnAttributeNamedParameter()
{
await TestMissingInRegularAndScriptAsync(
"""
using System;
class TestAttribute : Attribute
{
public TestAttribute(int a = 42)
{
}
}
[Test([|a|]: 1)]
class Goo
{
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544264")]
public async Task TestMissingOnVariableWrite()
{
await TestMissingInRegularAndScriptAsync(
"""
class Program
{
void Main()
{
var x = new int[3];
[|x[1]|] = 2;
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544577")]
[WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/909152")]
public async Task TestExpressionTLambda()
{
await TestMissingInRegularAndScriptAsync(
"""
using System;
using System.Linq.Expressions;
class Program
{
static Expression<Func<int?, char?>> e1 = c => [|null|];
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544915")]
public async Task TestMissingOnTypeSyntax()
{
await TestMissingInRegularAndScriptAsync(
"""
using System;
class Program
{
void Main()
{
int[,] array2Da = new [|int[1, 2]|] { { 1, 2 } };
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544610")]
public async Task ParenthesizeIfParseChanges()
{
var code = """
class C
{
static void M()
{
int x = 2;
Bar(x < [|1|], x > (2 + 3));
}
}
""";
var expected = """
class C
{
static void M()
{
int x = 2;
const int {|Rename:V|} = 1;
Bar(x < V, (x > (2 + 3)));
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact]
public async Task TestInPartiallyHiddenMethod()
{
await TestInRegularAndScript1Async(
"""
class Program
{
#line hidden
void Main()
{
#line default
Goo([|1 + 1|]);
}
}
""",
"""
class Program
{
#line hidden
void Main()
{
#line default
Goo(V);
}
private const int {|Rename:V|} = 1 + 1;
}
""", parameters: new TestParameters(Options.Regular));
}
[Fact]
public async Task TestInVisibleMethod()
{
await TestInRegularAndScriptAsync(
"""
#line hidden
class Program
{
#line default
void Main()
{
Goo([|1 + 1|]);
}
#line hidden
}
#line default
""",
"""
#line hidden
class Program
{
#line default
void Main()
{
const int {|Rename:V|} = 1 + 1;
Goo(V);
}
#line hidden
}
#line default
""");
}
[Fact]
public async Task TestMissingInFieldInPartiallyHiddenType()
{
await TestMissingAsync(
"""
class Program
{
int i = [|1 + 1|];
#line hidden
}
#line default
""", new TestParameters(Options.Regular));
}
[Fact]
public async Task TestMissingInAttributeInPartiallyHiddenType()
{
await TestMissingAsync(
"""
[Goo([|1 + 1|])]
class Program
{
#line hidden
}
#line default
""", new TestParameters(Options.Regular));
}
[Fact]
public async Task TestMissingInConstructorInitializerInPartiallyHiddenType()
{
await TestMissingAsync(
"""
class Program
{
public Program() : this([|1 + 1|])
{
}
#line hidden
}
#line default
""", new TestParameters(Options.Regular));
}
[Fact]
public async Task TestMissingInParameterInPartiallyHiddenType()
{
await TestMissingAsync(
"""
class Program
{
public Program(int i = [|1 + 1|])
{
}
#line hidden
}
#line default
""", new TestParameters(Options.Regular));
}
[Fact]
public async Task TestMissingInQueryInPartiallyHiddenType()
{
await TestMissingAsync(
"""
using System.Linq;
class Program
{
public Program(string[] args)
{
var q = from x in args
#line hidden
let z = 1
#line default
select [|x + x|];
}
}
""", new TestParameters(Options.Regular));
}
[Fact]
public async Task TestInVisibleQueryInHiddenType()
{
await TestAsync(
"""
#line hidden
using System.Linq;
class Program
{
public Program(string[] args)
{
var q =
#line default
from x in args
let z = 1
select [|x + x|];
#line hidden
}
}
#line default
""",
"""
#line hidden
using System.Linq;
class Program
{
public Program(string[] args)
{
var q =
#line default
from x in args
let z = 1
let {|Rename:v|} = x + x
select v;
#line hidden
}
}
#line default
""",
parseOptions: Options.Regular);
}
[Fact]
public async Task TestMissingOnNamespace()
{
await TestMissingInRegularAndScriptAsync(
"""
class Program
{
void Main()
{
[|System|].Console.WriteLine(4);
}
}
""");
}
[Fact]
public async Task TestMissingOnType()
{
await TestMissingInRegularAndScriptAsync(
"""
class Program
{
void Main()
{
[|System.Console|].WriteLine(4);
}
}
""");
}
[Fact]
public async Task TestMissingOnBase()
{
await TestMissingInRegularAndScriptAsync(
"""
class Program
{
void Main()
{
[|base|].ToString();
}
}
""");
}
[Fact]
public async Task TestVenusGeneration1()
{
await TestMissingInRegularAndScriptAsync(
"""
class Program
{
void Main()
{
#line 1 "goo"
Console.WriteLine([|5|]);
#line default
#line hidden
}
}
""");
}
[Fact]
public async Task TestVenusGeneration2()
{
var code =
"""
class Program
{
void Main ( )
{
#line 1 "goo"
if (true)
{
Console.WriteLine([|5|]);
}
#line default
#line hidden
}
}
""";
await TestExactActionSetOfferedAsync(code, new[] { string.Format(FeaturesResources.Introduce_local_constant_for_0, "5") });
await TestInRegularAndScriptAsync(code,
"""
class Program
{
void Main ( )
{
#line 1 "goo"
if (true)
{
const int {|Rename:V|} = 5;
Console.WriteLine(V);
}
#line default
#line hidden
}
}
""");
}
[Fact]
public async Task TestVenusGeneration3()
{
var code =
"""
class Program
{
#line 1 "goo"
void Main ( )
{
if (true)
{
Console.WriteLine([|5|]);
}
}
#line default
#line hidden
}
""";
await TestExactActionSetOfferedAsync(code,
new[] { string.Format(FeaturesResources.Introduce_local_constant_for_0, "5"), string.Format(FeaturesResources.Introduce_local_constant_for_all_occurrences_of_0, "5") });
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/529795")]
public async Task TestMissingOnNegatedLiteral()
{
await TestMissingInRegularAndScriptAsync(
"""
class A
{
void Main()
{
long x = -[|9223372036854775808|];
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/546091")]
public async Task TestNotOnInterfaceAttribute()
{
await TestMissingInRegularAndScriptAsync(
"""
[GuidAttribute([|"1A585C4D-3371-48dc-AF8A-AFFECC1B0967"|])]
public interface I
{
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/546095")]
public async Task TestNotOnTypeOfInAttribute()
{
await TestMissingInRegularAndScriptAsync(
"""
using System.Runtime.InteropServices;
[ComSourceInterfaces([|typeof(GuidAttribute)|])]
public class Button
{
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530109")]
public async Task TestPreferGenerateConstantField1()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void goo(string s = "Hello")
{
var s2 = [|"Hello"|] + "World";
}
}
""",
"""
class C
{
private const string {|Rename:V|} = "Hello";
void goo(string s = "Hello")
{
var s2 = V + "World";
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530109")]
public async Task TestPreferGenerateConstantField2()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void goo(string s = "Hello")
{
var s2 = [|"Hello"|] + "World";
}
}
""",
"""
class C
{
private const string {|Rename:V|} = "Hello";
void goo(string s = V)
{
var s2 = V + "World";
}
}
""",
index: 1);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530109")]
public async Task TestPreferGenerateConstantField3()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void goo(string s = "Hello")
{
var s2 = [|"Hello"|] + "World";
}
}
""",
"""
class C
{
void goo(string s = "Hello")
{
const string {|Rename:V|} = "Hello";
var s2 = V + "World";
}
}
""",
index: 2);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530109")]
public async Task TestPreferGenerateConstantField4()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void goo(string s = "Hello")
{
var s2 = [|"Hello"|] + "World";
}
}
""",
"""
class C
{
void goo(string s = "Hello")
{
const string {|Rename:V|} = "Hello";
var s2 = V + "World";
}
}
""",
index: 3);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530109")]
public async Task TestNoGenerateConstantFieldIfAccessingLocal1()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void goo(string s = "Hello")
{
const string s1 = "World";
var s2 = [|"Hello" + s1|];
}
}
""",
"""
class C
{
void goo(string s = "Hello")
{
const string s1 = "World";
const string {|Rename:V|} = "Hello" + s1;
var s2 = V;
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530109")]
public async Task TestNoGenerateConstantFieldIfAccessingLocal2()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void goo(string s = "Hello")
{
const string s1 = "World";
var s2 = [|"Hello" + s1|];
}
}
""",
"""
class C
{
void goo(string s = "Hello")
{
const string s1 = "World";
const string {|Rename:V|} = "Hello" + s1;
var s2 = V;
}
}
""",
index: 1);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530109")]
public async Task TestNoGenerateConstantFieldIfNotAccessingLocal1()
{
await TestInRegularAndScriptAsync(
"""
class C
{
const string s1 = "World";
void goo(string s = "Hello")
{
var s2 = [|"Hello" + s1|];
}
}
""",
"""
class C
{
const string s1 = "World";
private const string {|Rename:V|} = "Hello" + s1;
void goo(string s = "Hello")
{
var s2 = V;
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530109")]
public async Task TestNoGenerateConstantFieldIfNotAccessingLocal2()
{
await TestInRegularAndScriptAsync(
"""
class C
{
const string s1 = "World";
void goo(string s = "Hello")
{
var s2 = [|"Hello" + s1|];
}
}
""",
"""
class C
{
const string s1 = "World";
private const string {|Rename:V|} = "Hello" + s1;
void goo(string s = "Hello")
{
var s2 = V;
}
}
""",
index: 1);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530109")]
public async Task TestNoGenerateConstantFieldIfNotAccessingLocal3()
{
await TestInRegularAndScriptAsync(
"""
class C
{
const string s1 = "World";
void goo(string s = "Hello")
{
var s2 = [|"Hello" + s1|];
}
}
""",
"""
class C
{
const string s1 = "World";
void goo(string s = "Hello")
{
const string {|Rename:V|} = "Hello" + s1;
var s2 = V;
}
}
""",
index: 2);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530109")]
public async Task TestNoGenerateConstantFieldIfNotAccessingLocal4()
{
await TestInRegularAndScriptAsync(
"""
class C
{
const string s1 = "World";
void goo(string s = "Hello")
{
var s2 = [|"Hello" + s1|];
}
}
""",
"""
class C
{
const string s1 = "World";
void goo(string s = "Hello")
{
const string {|Rename:V|} = "Hello" + s1;
var s2 = V;
}
}
""",
index: 3);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/606347")]
public async Task InsertNeededCast1()
{
await TestInRegularAndScriptAsync(
"""
using System;
static class C
{
static void Inner(Action<string> x, string y) { }
static void Inner(Action<string> x, int y) { }
static void Inner(Action<int> x, int y) { }
static void Outer(Action<string> x, object y) { Console.WriteLine(1); }
static void Outer(Action<int> x, string y) { Console.WriteLine(2); }
static T Goo<T>(T x) { return x; }
static void Main()
{
Outer(y => Inner(x => { [|Goo(x)|].ToString(); }, y), null);
}
}
""",
"""
using System;
static class C
{
static void Inner(Action<string> x, string y) { }
static void Inner(Action<string> x, int y) { }
static void Inner(Action<int> x, int y) { }
static void Outer(Action<string> x, object y) { Console.WriteLine(1); }
static void Outer(Action<int> x, string y) { Console.WriteLine(2); }
static T Goo<T>(T x) { return x; }
static void Main()
{
Outer(y => Inner(x => { var {|Rename:v|} = Goo(x); v.ToString(); }, y), null);
}
}
""",
options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/606347")]
public async Task InsertNeededCast1NotVar()
{
await TestInRegularAndScriptAsync(
"""
using System;
static class C
{
static void Inner(Action<string> x, string y) { }
static void Inner(Action<string> x, int y) { }
static void Inner(Action<int> x, int y) { }
static void Outer(Action<string> x, object y) { Console.WriteLine(1); }
static void Outer(Action<int> x, string y) { Console.WriteLine(2); }
static T Goo<T>(T x) { return x; }
static void Main()
{
Outer(y => Inner(x => { [|Goo(x)|].ToString(); }, y), null);
}
}
""",
"""
using System;
static class C
{
static void Inner(Action<string> x, string y) { }
static void Inner(Action<string> x, int y) { }
static void Inner(Action<int> x, int y) { }
static void Outer(Action<string> x, object y) { Console.WriteLine(1); }
static void Outer(Action<int> x, string y) { Console.WriteLine(2); }
static T Goo<T>(T x) { return x; }
static void Main()
{
Outer(y => Inner(x => { string {|Rename:v|} = Goo(x); v.ToString(); }, y), (object)null);
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/606347"), WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/714632")]
public async Task InsertNeededCast2()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
static void Main()
{
byte z = 0;
Goo([|x => 0|], y => 0, z, z);
}
static void Goo<T, S>(Func<S, T> p, Func<T, S> q, T r, S s) { Console.WriteLine(1); }
static void Goo(Func<byte, byte> p, Func<byte, byte> q, int r, int s) { Console.WriteLine(2); }
}
""",
"""
using System;
class Program
{
static void Main()
{
byte z = 0;
Func<byte, byte> {|Rename:p|} = x => 0;
Goo(p, y => (byte)0, z, z);
}
static void Goo<T, S>(Func<S, T> p, Func<T, S> q, T r, S s) { Console.WriteLine(1); }
static void Goo(Func<byte, byte> p, Func<byte, byte> q, int r, int s) { Console.WriteLine(2); }
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/546512")]
public async Task TestInSwitchSection()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
int Main(int i)
{
switch (1)
{
case 0:
var f = Main([|1 + 1|]);
Console.WriteLine(f);
}
}
}
""",
"""
using System;
class Program
{
int Main(int i)
{
switch (1)
{
case 0:
const int {|Rename:I|} = 1 + 1;
var f = Main(I);
Console.WriteLine(f);
}
}
}
""",
index: 2);
}
[Fact]
public async Task TestInSwitchSection_AllOccurencesMultiStatement()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
int Main(int i)
{
switch (1)
{
case 0:
var f = Main([|1 + 1|]);
var g = Main(1 + 1);
case 1:
Console.WriteLine(1 + 0);
}
}
}
""",
"""
using System;
class Program
{
int Main(int i)
{
switch (1)
{
case 0:
const int {|Rename:I|} = 1 + 1;
var f = Main(I);
var g = Main(I);
case 1:
Console.WriteLine(1 + 0);
}
}
}
""",
index: 3);
}
[Fact]
public async Task TestInSwitchSection_AllOccurencesDifferentSections()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
int Main(int i)
{
switch (1)
{
case 0:
var f = Main([|1 + 1|]);
var g = Main(1 + 1);
case 1:
Console.WriteLine(1 + 1);
}
}
}
""",
"""
using System;
class Program
{
int Main(int i)
{
const int {|Rename:I|} = 1 + 1;
switch (1)
{
case 0:
var f = Main(I);
var g = Main(I);
case 1:
Console.WriteLine(I);
}
}
}
""",
index: 3);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530480")]
public async Task TestLambdaParameter1()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
static void Main(string[] args)
{
Func<int, int> f = x => [|x + 1|];
}
}
""",
"""
using System;
class Program
{
static void Main(string[] args)
{
Func<int, int> f = x =>
{
var {|Rename:v|} = x + 1;
return v;
};
}
}
""",
options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530480")]
public async Task TestLambdaParameter2()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
static void Main(string[] args)
{
Func<int, Func<int, int>> f = x => y => [|x + 1|];
}
}
""",
"""
using System;
class Program
{
static void Main(string[] args)
{
Func<int, Func<int, int>> f = x => y =>
{
var {|Rename:v|} = x + 1;
return v;
};
}
}
""",
options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530480")]
public async Task TestLambdaParameter3()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
static void Main(string[] args)
{
Func<int, Func<int, int>> f = x => y => [|y + 1|];
}
}
""",
"""
using System;
class Program
{
static void Main(string[] args)
{
Func<int, Func<int, int>> f = x => y =>
{
var {|Rename:v|} = y + 1;
return v;
};
}
}
""",
options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530480")]
public async Task TestLambdaParameter4()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
static void Main(string[] args)
{
Func<int, Func<int, int>> f = x => [|y => y + 1|];
}
}
""",
"""
using System;
class Program
{
static void Main(string[] args)
{
Func<int, Func<int, int>> f = x =>
{
Func<int, int> {|Rename:value|} = y => y + 1;
return value;
};
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530480")]
public async Task TestLambdaParameter5()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
static void Main(string[] args)
{
Func<int, Func<int, int>> f = x => [|y => x + 1|];
}
}
""",
"""
using System;
class Program
{
static void Main(string[] args)
{
Func<int, Func<int, int>> f = x =>
{
Func<int, int> {|Rename:value|} = y => x + 1;
return value;
};
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530721")]
public async Task TestIntroVarInAction1()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
void M()
{
Action<int> goo = x => [|x.ToString()|];
}
}
""",
"""
using System;
class Program
{
void M()
{
Action<int> goo = x =>
{
string {|Rename:v|} = x.ToString();
};
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530919")]
public async Task TestNullableOfPointerType()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
static void Main()
{
[|new Nullable<int*>()|].GetValueOrDefault();
}
}
""",
"""
using System;
class Program
{
static void Main()
{
var {|Rename:v|} = new Nullable<int*>();
v.GetValueOrDefault();
}
}
""",
options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530919")]
public async Task TestNullableOfPointerTypeNotVar()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
static void Main()
{
[|new Nullable<int*>()|].GetValueOrDefault();
}
}
""",
"""
using System;
class Program
{
static void Main()
{
Nullable<int*> {|Rename:v|} = new Nullable<int*>();
v.GetValueOrDefault();
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/830885")]
public async Task TestIntroduceLocalRemovesUnnecessaryCast()
{
await TestInRegularAndScriptAsync(
"""
using System.Collections.Generic;
class C
{
static void Main(string[] args)
{
var set = new HashSet<string>();
set.Add([|set.ToString()|]);
}
}
""",
"""
using System.Collections.Generic;
class C
{
static void Main(string[] args)
{
var set = new HashSet<string>();
var {|Rename:item|} = set.ToString();
set.Add(item);
}
}
""",
options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/655498")]
public async Task HandleParenthesizedExpression()
{
await TestInRegularAndScriptAsync(
"""
using System;
class C
{
void Goo()
{
([|(C.Bar)|].Invoke)();
}
static Action Bar;
}
""",
"""
using System;
class C
{
void Goo()
{
Action {|Rename:bar|} = (C.Bar);
bar.Invoke();
}
static Action Bar;
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/682683")]
public async Task DontRemoveParenthesesIfOperatorPrecedenceWouldBeBroken()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
static void Main()
{
Console.WriteLine(5 - ([|1|] + 2));
}
}
""",
"""
using System;
class Program
{
static void Main()
{
const int {|Rename:V|} = 1;
Console.WriteLine(5 - (V + 2));
}
}
""",
index: 2);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/828108")]
public async Task UseNewSemanticModelForSimplification()
{
await TestInRegularAndScriptAsync(
"""
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
class Program
{
static void Main(string[] args)
{
var d = new Dictionary<string, Exception>();
d.Add("a", [|new Exception()|]);
}
}
""",
"""
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
class Program
{
static void Main(string[] args)
{
var d = new Dictionary<string, Exception>();
var {|Rename:value|} = new Exception();
d.Add("a", value);
}
}
""",
options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/884961")]
public async Task TestInCollectionInitializer()
{
await TestInRegularAndScriptAsync(
"""
using System;
using System.Collections.Generic;
class C
{
void M()
{
var l = new List<int>() { [|Environment.TickCount|] };
}
}
""",
"""
using System;
using System.Collections.Generic;
class C
{
void M()
{
var {|Rename:tickCount|} = Environment.TickCount;
var l = new List<int>() { tickCount };
}
}
""",
options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/884961")]
public async Task TestInCollectionInitializerNoVar()
{
await TestInRegularAndScriptAsync(
"""
using System;
using System.Collections.Generic;
class C
{
void M()
{
var l = new List<int>() { [|Environment.TickCount|] };
}
}
""",
"""
using System;
using System.Collections.Generic;
class C
{
void M()
{
int {|Rename:tickCount|} = Environment.TickCount;
var l = new List<int>() { tickCount };
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/854662")]
public async Task TestInNestedCollectionInitializers()
{
await TestInRegularAndScriptAsync(
"""
using System;
using System.Collections.Generic;
class C
{
public Dictionary<int, int> A { get; private set; }
static int Main(string[] args)
{
int a = 0;
return new Program { A = { { [|a + 2|], 0 } } }.A.Count;
}
}
""",
"""
using System;
using System.Collections.Generic;
class C
{
public Dictionary<int, int> A { get; private set; }
static int Main(string[] args)
{
int a = 0;
var {|Rename:v|} = a + 2;
return new Program { A = { { v, 0 } } }.A.Count;
}
}
""",
options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/884961")]
public async Task TestInArrayInitializer()
{
await TestInRegularAndScriptAsync(
"""
using System;
using System.Collections.Generic;
class C
{
void M()
{
var a = new int[] { [|Environment.TickCount|] };
}
}
""",
"""
using System;
using System.Collections.Generic;
class C
{
void M()
{
var {|Rename:tickCount|} = Environment.TickCount;
var a = new int[] { tickCount };
}
}
""",
options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/884961")]
public async Task TestInArrayInitializerWithoutVar()
{
await TestInRegularAndScriptAsync(
"""
using System;
using System.Collections.Generic;
class C
{
void M()
{
var a = new int[] { [|Environment.TickCount|] };
}
}
""",
"""
using System;
using System.Collections.Generic;
class C
{
void M()
{
int {|Rename:tickCount|} = Environment.TickCount;
var a = new int[] { tickCount };
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1022447")]
public async Task TestFormattingOfIntroduceLocal2()
{
await TestInRegularAndScriptAsync(
"""
using System;
class C
{
void M()
{
var s = "Text";
var x = 42;
if ([|s.Length|].CompareTo(x) > 0 &&
s.Length.CompareTo(x) > 0)
{
}
}
}
""",
"""
using System;
class C
{
void M()
{
var s = "Text";
var x = 42;
var {|Rename:length|} = s.Length;
if (length.CompareTo(x) > 0 &&
length.CompareTo(x) > 0)
{
}
}
}
""",
index: 1,
options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/939259")]
public async Task TestIntroduceLocalWithTriviaInMultiLineStatements()
{
var code =
"""
class C
{
void Goo()
{
var d = [|true|] // TODO: comment
? 1
: 2;
}
}
""";
var expected =
"""
class C
{
void Goo()
{
const bool {|Rename:V|} = true;
var d = V // TODO: comment
? 1
: 2;
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 3);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/939259")]
public async Task TestIntroduceLocalWithTriviaInMultiLineStatements2()
{
var code =
"""
class C
{
void Goo()
{
var d = true
? 1
: [|2|]; // TODO: comment
}
}
""";
var expected =
"""
class C
{
void Goo()
{
const int {|Rename:V|} = 2;
var d = true
? 1
: V; // TODO: comment
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 3);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1064803")]
public async Task TestIntroduceLocalInStringInterpolation()
{
var code =
"""
class C
{
void Goo()
{
var s = $"Alpha Beta { [|int.Parse("12345")|] } Gamma";
}
}
""";
var expected =
"""
class C
{
void Goo()
{
var {|Rename:v|} = int.Parse("12345");
var s = $"Alpha Beta {v} Gamma";
}
}
""";
await TestInRegularAndScriptAsync(code, expected, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1037057")]
public async Task TestIntroduceLocalWithBlankLine()
{
await TestInRegularAndScriptAsync("""
class C
{
void M()
{
int x = 5;
// comment
int y = [|(x + 5)|] * (x + 5);
}
}
""", """
class C
{
void M()
{
int x = 5;
// comment
var {|Rename:v|} = (x + 5);
int y = v * (x + 5);
}
}
""", options: ImplicitTypingEverywhere());
}
[Fact]
public async Task TestIntroduceLocalWithBlankLine_AllOccurencesMultiStatement()
{
await TestInRegularAndScriptAsync("""
class C
{
void M()
{
int x = 5;
// comment
int y = [|(x + 5)|] * (x + 5);
int z = (x + 5);
}
}
""", """
class C
{
void M()
{
int x = 5;
// comment
var {|Rename:v|} = (x + 5);
int y = v * v;
int z = v;
}
}
""", options: ImplicitTypingEverywhere(), index: 1);
}
[Fact]
public Task TestIntroduceLocal_NullableType_FlowStateNonNull()
=> TestInRegularAndScriptAsync("""
#nullable enable
class C
{
void M()
{
string? s = string.Empty;
M2([|s|]);
}
void M2(string? s)
{
}
}
""", """
#nullable enable
class C
{
void M()
{
string? s = string.Empty;
string {|Rename:s1|} = s;
M2(s1);
}
void M2(string? s)
{
}
}
""");
[Fact]
public Task TestIntroduceLocal_NullableType_FlowStateNull()
=> TestInRegularAndScriptAsync("""
#nullable enable
class C
{
void M()
{
string? s = null;
M2([|s|]);
}
void M2(string? s)
{
}
}
""", """
#nullable enable
class C
{
void M()
{
string? s = null;
string? {|Rename:s1|} = s;
M2(s1);
}
void M2(string? s)
{
}
}
""");
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1065661")]
public async Task TestIntroduceVariableTextDoesntSpanLines1()
{
await TestSmartTagTextAsync(
"""
class C
{
void M()
{
var s = [|@"a
b
c"|];
}
}
""",
string.Format(FeaturesResources.Introduce_local_constant_for_0, """
@"a b c"
"""),
index: 2);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1065661")]
public async Task TestIntroduceVariableTextDoesntSpanLines2()
{
await TestSmartTagTextAsync(
"""
class C
{
void M()
{
var s = [|$@"a
b
c"|];
}
}
""",
string.Format(FeaturesResources.Introduce_constant_for_0, """
$@"a b c"
"""));
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1097147")]
public async Task TestSmartNameForNullablesInConditionalAccessExpressionContext()
{
var code =
"""
using System;
class C
{
static void Goo(string s)
{
var l = [|s?.Length|] ?? 0;
}
}
""";
var expected =
"""
using System;
class C
{
static void Goo(string s)
{
var {|Rename:length|} = s?.Length;
var l = length ?? 0;
}
}
""";
await TestInRegularAndScriptAsync(code, expected, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1097147")]
public async Task TestSmartNameForNullablesInConditionalAccessExpressionContext2()
{
var code =
"""
using System;
class C
{
static void Goo(string s)
{
var l = [|s?.ToLower()|] ?? string.Empty;
}
}
""";
var expected =
"""
using System;
class C
{
static void Goo(string s)
{
var {|Rename:v|} = s?.ToLower();
var l = v ?? string.Empty;
}
}
""";
await TestInRegularAndScriptAsync(code, expected, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1097147")]
public async Task TestSmartNameForNullablesInConditionalAccessExpressionContext3()
{
var code =
"""
using System;
class Program
{
static void Main(string[] args)
{
A a = new A();
var l = [|a?.Prop?.Length|] ?? 0;
}
}
class A
{
public B Prop { get; set; }
}
class B
{
public int Length { get; set; }
}
""";
var expected =
"""
using System;
class Program
{
static void Main(string[] args)
{
A a = new A();
var {|Rename:length|} = a?.Prop?.Length;
var l = length ?? 0;
}
}
class A
{
public B Prop { get; set; }
}
class B
{
public int Length { get; set; }
}
""";
await TestInRegularAndScriptAsync(code, expected, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1097147")]
public async Task TestSmartNameForNullablesInConditionalAccessExpressionContext4()
{
var code =
"""
using System;
class Program
{
static void Main(string[] args)
{
A a = new A();
var age = [|a?.Prop?.GetAge()|] ?? 0;
}
}
class A
{
public B Prop { get; set; }
}
class B
{
int age;
public int GetAge() { return age; }
}
""";
var expected =
"""
using System;
class Program
{
static void Main(string[] args)
{
A a = new A();
var {|Rename:v|} = a?.Prop?.GetAge();
var age = v ?? 0;
}
}
class A
{
public B Prop { get; set; }
}
class B
{
int age;
public int GetAge() { return age; }
}
""";
await TestInRegularAndScriptAsync(code, expected, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
public async Task TestIntroduceFieldInExpressionBodiedMethod()
{
var code =
"""
using System;
class T
{
int m;
int M1() => [|1|] + 2 + 3 + m;
}
""";
var expected =
"""
using System;
class T
{
private const int {|Rename:V|} = 1;
int m;
int M1() => V + 2 + 3 + m;
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
public async Task TestIntroduceLocalInExpressionBodiedNonVoidMethod()
{
var code =
"""
using System;
class T
{
int m;
int M1() => [|1|] + 2 + 3 + m;
}
""";
var expected =
"""
using System;
class T
{
int m;
int M1()
{
const int {|Rename:V|} = 1;
return V + 2 + 3 + m;
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/31012")]
public async Task TestIntroduceLocalInArgumentList()
{
var code =
"""
using System;
public interface IResolver { int Resolve(); }
public class Test
{
private void register(Func<IResolver, object> a) { }
private void test(Func<int, object> factory)
=> register(x => factory(
[|x.Resolve()|]
));
}
""";
var expected =
"""
using System;
public interface IResolver { int Resolve(); }
public class Test
{
private void register(Func<IResolver, object> a) { }
private void test(Func<int, object> factory)
=> register(x =>
{
int {|Rename:arg|} = x.Resolve();
return factory(
arg
);
});
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 0);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/24807")]
public async Task TestIntroduceLocalInExpressionBodiedVoidMethod()
{
var code =
"""
using System;
class T
{
int m;
void M1() => Console.WriteLine([|1|] + 2 + 3 + m);
}
""";
var expected =
"""
using System;
class T
{
int m;
void M1()
{
const int {|Rename:V|} = 1;
Console.WriteLine(V + 2 + 3 + m);
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact]
public async Task TestIntroduceFieldInExpressionBodiedConstructor()
{
var code =
"""
using System;
class T
{
int m;
T() => Console.WriteLine([|1|] + 2 + 3 + m);
}
""";
var expected =
"""
using System;
class T
{
private const int {|Rename:V|} = 1;
int m;
T() => Console.WriteLine(V + 2 + 3 + m);
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/24807")]
public async Task TestIntroduceLocalInExpressionBodiedConstructor()
{
var code =
"""
using System;
class T
{
int m;
T() => Console.WriteLine([|1|] + 2 + 3 + m);
}
""";
var expected =
"""
using System;
class T
{
int m;
T()
{
const int {|Rename:V|} = 1;
Console.WriteLine(V + 2 + 3 + m);
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact]
public async Task TestIntroduceFieldInExpressionBodiedDestructor()
{
var code =
"""
using System;
class T
{
int m;
~T() => Console.WriteLine([|1|] + 2 + 3 + m);
}
""";
var expected =
"""
using System;
class T
{
private const int {|Rename:V|} = 1;
int m;
~T() => Console.WriteLine(V + 2 + 3 + m);
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/24807")]
public async Task TestIntroduceLocalInExpressionBodiedDestructor()
{
var code =
"""
using System;
class T
{
int m;
~T() => Console.WriteLine([|1|] + 2 + 3 + m);
}
""";
var expected =
"""
using System;
class T
{
int m;
~T()
{
const int {|Rename:V|} = 1;
Console.WriteLine(V + 2 + 3 + m);
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
public async Task TestIntroduceFieldInExpressionBodiedOperator()
{
var code =
"""
using System;
class Complex
{
int real; int imaginary;
public static Complex operator +(Complex a, Complex b) => a.Add(b.real + [|1|]);
private Complex Add(int b)
{
throw new NotImplementedException();
}
}
""";
var expected =
"""
using System;
class Complex
{
private const int {|Rename:V|} = 1;
int real; int imaginary;
public static Complex operator +(Complex a, Complex b) => a.Add(b.real + V);
private Complex Add(int b)
{
throw new NotImplementedException();
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
public async Task TestIntroduceLocalInExpressionBodiedOperator()
{
var code =
"""
using System;
class Complex
{
int real; int imaginary;
public static Complex operator +(Complex a, Complex b) => a.Add([|b.real + 1|]);
private Complex Add(int b)
{
throw new NotImplementedException();
}
}
""";
var expected =
"""
using System;
class Complex
{
int real; int imaginary;
public static Complex operator +(Complex a, Complex b)
{
var {|Rename:b1|} = b.real + 1;
return a.Add(b1);
}
private Complex Add(int b)
{
throw new NotImplementedException();
}
}
""";
await TestInRegularAndScriptAsync(code, expected, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
public async Task TestIntroduceFieldInExpressionBodiedConversionOperator()
{
var code =
"""
using System;
public struct DBBool
{
public static readonly DBBool dbFalse = new DBBool(-1);
int value;
DBBool(int value)
{
this.value = value;
}
public static implicit operator DBBool(bool x) => x ? new DBBool([|1|]) : dbFalse;
}
""";
var expected =
"""
using System;
public struct DBBool
{
private const int {|Rename:Value|} = 1;
public static readonly DBBool dbFalse = new DBBool(-1);
int value;
DBBool(int value)
{
this.value = value;
}
public static implicit operator DBBool(bool x) => x ? new DBBool(Value) : dbFalse;
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task TestIntroduceLocalInExpressionBodiedConversionOperator()
{
var code =
"""
using System;
public struct DBBool
{
public static readonly DBBool dbFalse = new DBBool(-1);
int value;
DBBool(int value)
{
this.value = value;
}
public static implicit operator DBBool(bool x) => x ? new DBBool([|1|]) : dbFalse;
}
""";
var expected =
"""
using System;
public struct DBBool
{
public static readonly DBBool dbFalse = new DBBool(-1);
int value;
DBBool(int value)
{
this.value = value;
}
public static implicit operator DBBool(bool x)
{
const int {|Rename:Value|} = 1;
return x ? new DBBool(Value) : dbFalse;
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
public async Task TestIntroduceFieldInExpressionBodiedProperty()
{
var code =
"""
using System;
class T
{
int M1 => [|1|] + 2;
}
""";
var expected =
"""
using System;
class T
{
private const int {|Rename:V|} = 1;
int M1 => V + 2;
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
public async Task TestIntroduceLocalInExpressionBodiedProperty()
{
var code =
"""
using System;
class T
{
int M1 => [|1|] + 2;
}
""";
var expected =
"""
using System;
class T
{
int M1
{
get
{
const int {|Rename:V|} = 1;
return V + 2;
}
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
public async Task TestIntroduceFieldInExpressionBodiedIndexer()
{
var code =
"""
using System;
class SampleCollection<T>
{
private T[] arr = new T[100];
public T this[int i] => i > [|0|] ? arr[i + 1] : arr[i + 2];
}
""";
var expected =
"""
using System;
class SampleCollection<T>
{
private const int {|Rename:V|} = 0;
private T[] arr = new T[100];
public T this[int i] => i > V ? arr[i + 1] : arr[i + 2];
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
public async Task TestIntroduceLocalInExpressionBodiedIndexer()
{
var code =
"""
using System;
class SampleCollection<T>
{
private T[] arr = new T[100];
public T this[int i] => i > 0 ? arr[[|i + 1|]] : arr[i + 2];
}
""";
var expected =
"""
using System;
class SampleCollection<T>
{
private T[] arr = new T[100];
public T this[int i]
{
get
{
var {|Rename:v|} = i + 1;
return i > 0 ? arr[v] : arr[i + 2];
}
}
}
""";
await TestInRegularAndScriptAsync(code, expected, options: ImplicitTypingEverywhere());
}
[Fact]
public async Task TestIntroduceFieldInExpressionBodiedPropertyGetter()
{
var code =
"""
using System;
class T
{
int M1
{
get => [|1|] + 2;
}
}
""";
var expected =
"""
using System;
class T
{
private const int {|Rename:V|} = 1;
int M1
{
get => V + 2;
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task TestIntroduceLocalInExpressionBodiedPropertyGetter()
{
var code =
"""
using System;
class T
{
int M1
{
get => [|1|] + 2;
}
}
""";
var expected =
"""
using System;
class T
{
int M1
{
get
{
const int {|Rename:V|} = 1;
return V + 2;
}
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact]
public async Task TestIntroduceFieldInExpressionBodiedPropertySetter()
{
var code =
"""
using System;
class T
{
int M1
{
set => Console.WriteLine([|1|] + 2);
}
}
""";
var expected =
"""
using System;
class T
{
private const int {|Rename:V|} = 1;
int M1
{
set => Console.WriteLine(V + 2);
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task TestIntroduceLocalInExpressionBodiedPropertySetter()
{
var code =
"""
using System;
class T
{
int M1
{
set => Console.WriteLine([|1|] + 2);
}
}
""";
var expected =
"""
using System;
class T
{
int M1
{
set
{
const int {|Rename:V|} = 1;
Console.WriteLine(V + 2);
}
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact]
public async Task TestIntroduceFieldInExpressionBodiedIndexerGetter()
{
var code =
"""
using System;
class T
{
int this[int i]
{
get => [|1|] + 2;
}
}
""";
var expected =
"""
using System;
class T
{
private const int {|Rename:V|} = 1;
int this[int i]
{
get => V + 2;
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task TestIntroduceLocalInExpressionBodiedIndexerGetter()
{
var code =
"""
using System;
class T
{
int this[int i]
{
get => [|1|] + 2;
}
}
""";
var expected =
"""
using System;
class T
{
int this[int i]
{
get
{
const int {|Rename:V|} = 1;
return V + 2;
}
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact]
public async Task TestIntroduceFieldInExpressionBodiedIndexerSetter()
{
var code =
"""
using System;
class T
{
int this[int i]
{
set => Console.WriteLine([|1|] + 2);
}
}
""";
var expected =
"""
using System;
class T
{
private const int {|Rename:V|} = 1;
int this[int i]
{
set => Console.WriteLine(V + 2);
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task TestIntroduceLocalInExpressionBodiedIndexerSetter()
{
var code =
"""
using System;
class T
{
int this[int i]
{
set => Console.WriteLine([|1|] + 2);
}
}
""";
var expected =
"""
using System;
class T
{
int this[int i]
{
set
{
const int {|Rename:V|} = 1;
Console.WriteLine(V + 2);
}
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact]
public async Task TestIntroduceFieldInExpressionBodiedEventAdder()
{
var code =
"""
using System;
class T
{
event EventHandler E
{
add => Console.WriteLine([|1|] + 2);
remove { }
}
}
""";
var expected =
"""
using System;
class T
{
private const int {|Rename:V|} = 1;
event EventHandler E
{
add => Console.WriteLine(V + 2);
remove { }
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task TestIntroduceLocalInExpressionBodiedEventAdder()
{
var code =
"""
using System;
class T
{
event EventHandler E
{
add => Console.WriteLine([|1|] + 2);
remove { }
}
}
""";
var expected =
"""
using System;
class T
{
event EventHandler E
{
add
{
const int {|Rename:V|} = 1;
Console.WriteLine(V + 2);
}
remove { }
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact]
public async Task TestIntroduceFieldInExpressionBodiedEventRemover()
{
var code =
"""
using System;
class T
{
event EventHandler E
{
add { }
remove => Console.WriteLine([|1|] + 2);
}
}
""";
var expected =
"""
using System;
class T
{
private const int {|Rename:V|} = 1;
event EventHandler E
{
add { }
remove => Console.WriteLine(V + 2);
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task TestIntroduceLocalInExpressionBodiedEventRemover()
{
var code =
"""
using System;
class T
{
event EventHandler E
{
add { }
remove => Console.WriteLine([|1|] + 2);
}
}
""";
var expected =
"""
using System;
class T
{
event EventHandler E
{
add { }
remove
{
const int {|Rename:V|} = 1;
Console.WriteLine(V + 2);
}
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact]
public async Task TestIntroduceFieldInExpressionBodiedLocalFunction()
{
var code =
"""
using System;
class T
{
void M()
{
int F() => [|1|] + 2;
}
}
""";
var expected =
"""
using System;
class T
{
private const int {|Rename:V|} = 1;
void M()
{
int F() => V + 2;
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task TestIntroduceLocalInExpressionBodiedNonVoidLocalFunction()
{
var code =
"""
using System;
class T
{
void M()
{
int F() => [|1|] + 2;
}
}
""";
var expected =
"""
using System;
class T
{
void M()
{
int F()
{
const int {|Rename:V|} = 1;
return V + 2;
}
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact]
public async Task TestIntroduceLocalInExpressionBodiedVoidLocalFunction()
{
var code =
"""
using System;
class T
{
void M()
{
void F() => Console.WriteLine([|1|] + 2);
}
}
""";
var expected =
"""
using System;
class T
{
void M()
{
void F()
{
const int {|Rename:V|} = 1;
Console.WriteLine(V + 2);
}
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
public async Task TestTrailingTriviaOnExpressionBodiedMethodRewrites()
{
var code =
"""
using System;
class T
{
int M1() => 1 + 2 + [|3|] /*not moved*/; /*moved to end of block*/
// rewrite should preserve newline above this.
void Cat() { }
}
""";
var expected =
"""
using System;
class T
{
int M1()
{
const int {|Rename:V|} = 3;
return 1 + 2 + V /*not moved*/;
} /*moved to end of block*/
// rewrite should preserve newline above this.
void Cat() { }
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
public async Task TestLeadingTriviaOnExpressionBodiedMethodRewrites()
{
var code =
"""
using System;
class T
{
/*not moved*/
int M1() => 1 + 2 + /*not moved*/ [|3|];
}
""";
var expected =
"""
using System;
class T
{
/*not moved*/
int M1()
{
const int {|Rename:V|} = 3;
return 1 + 2 + /*not moved*/ V;
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
public async Task TestTriviaAroundArrowTokenInExpressionBodiedMemberSyntax()
{
var code =
"""
using System;
class T
{
// comment
int M1() /*c1*/ => /*c2*/ 1 + 2 + /*c3*/ [|3|];
}
""";
var expected =
"""
using System;
class T
{
// comment
int M1() /*c1*/ /*c2*/
{
const int {|Rename:V|} = 3;
return 1 + 2 + /*c3*/ V;
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
[WorkItem("http://github.com/dotnet/roslyn/issues/971")]
public async Task TestIntroduceLocalInExpressionBodiedMethodWithBlockBodiedAnonymousMethodExpression()
{
var code =
"""
using System;
class TestClass
{
Func<int, int> Y() => delegate (int x)
{
return [|9|];
};
}
""";
var expected =
"""
using System;
class TestClass
{
Func<int, int> Y() => delegate (int x)
{
const int {|Rename:V|} = 9;
return V;
};
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
[WorkItem("http://github.com/dotnet/roslyn/issues/971")]
public async Task TestIntroduceLocalInExpressionBodiedMethodWithSingleLineBlockBodiedAnonymousMethodExpression()
{
var code =
"""
using System;
class TestClass
{
Func<int, int> Y() => delegate (int x) { return [|9|]; };
}
""";
var expected =
"""
using System;
class TestClass
{
Func<int, int> Y() => delegate (int x) { const int {|Rename:V|} = 9; return V; };
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
[WorkItem("http://github.com/dotnet/roslyn/issues/971")]
public async Task TestIntroduceLocalInExpressionBodiedMethodWithBlockBodiedSimpleLambdaExpression()
{
var code =
"""
using System;
class TestClass
{
Func<int, int> Y() => f =>
{
return f * [|9|];
};
}
""";
var expected =
"""
using System;
class TestClass
{
Func<int, int> Y() => f =>
{
const int {|Rename:V|} = 9;
return f * V;
};
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
public async Task TestIntroduceLocalInExpressionBodiedMethodWithExpressionBodiedSimpleLambdaExpression()
{
var code =
"""
using System;
class TestClass
{
Func<int, int> Y() => f => f * [|9|];
}
""";
var expected =
"""
using System;
class TestClass
{
Func<int, int> Y() => f =>
{
const int {|Rename:V|} = 9;
return f * V;
};
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
[WorkItem("http://github.com/dotnet/roslyn/issues/971")]
public async Task TestIntroduceLocalInExpressionBodiedMethodWithBlockBodiedParenthesizedLambdaExpression()
{
var code =
"""
using System;
class TestClass
{
Func<int, int> Y() => (f) =>
{
return f * [|9|];
};
}
""";
var expected =
"""
using System;
class TestClass
{
Func<int, int> Y() => (f) =>
{
const int {|Rename:V|} = 9;
return f * V;
};
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
public async Task TestIntroduceLocalInExpressionBodiedMethodWithExpressionBodiedParenthesizedLambdaExpression()
{
var code =
"""
using System;
class TestClass
{
Func<int, int> Y() => (f) => f * [|9|];
}
""";
var expected =
"""
using System;
class TestClass
{
Func<int, int> Y() => (f) =>
{
const int {|Rename:V|} = 9;
return f * V;
};
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/528")]
[WorkItem("http://github.com/dotnet/roslyn/issues/971")]
public async Task TestIntroduceLocalInExpressionBodiedMethodWithBlockBodiedAnonymousMethodExpressionInMethodArgs()
{
var code =
"""
using System;
class TestClass
{
public int Prop => Method1(delegate()
{
return [|8|];
});
}
""";
var expected =
"""
using System;
class TestClass
{
public int Prop => Method1(delegate()
{
const int {|Rename:V|} = 8;
return V;
});
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/976")]
public async Task TestNoConstantForInterpolatedStrings()
{
var code =
"""
using System;
class TestClass
{
static void Test(string[] args)
{
Console.WriteLine([|$"{DateTime.Now.ToString()}Text{args[0]}"|]);
}
}
""";
var expected =
"""
using System;
class TestClass
{
static void Test(string[] args)
{
var {|Rename:value|} = $"{DateTime.Now.ToString()}Text{args[0]}";
Console.WriteLine(value);
}
}
""";
await TestInRegularAndScriptAsync(code, expected, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/976")]
public async Task TestConstantForInterpolatedStrings()
{
var code =
"""
using System;
class TestClass
{
static void Test(string[] args)
{
Console.WriteLine([|$"Text{{s}}"|]);
Console.WriteLine($"Text{{s}}");
}
}
""";
var expected =
"""
using System;
class TestClass
{
private const string {|Rename:Value|} = $"Text{{s}}";
static void Test(string[] args)
{
Console.WriteLine(Value);
Console.WriteLine(Value);
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1, options: ImplicitTypingEverywhere());
}
[Fact]
public async Task TestConstantForInterpolatedStringsNested()
{
var code =
"""
using System;
class TestClass
{
static void Test(string[] args)
{
Console.WriteLine([|$"{"Level 5"} {"Number 3"}"|]);
Console.WriteLine($"{"Level 5"} {"Number 3"}");
}
}
""";
var expected =
"""
using System;
class TestClass
{
private const string {|Rename:Value|} = $"{"Level 5"} {"Number 3"}";
static void Test(string[] args)
{
Console.WriteLine(Value);
Console.WriteLine(Value);
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1, options: ImplicitTypingEverywhere());
}
[Fact]
public async Task TestConstantForInterpolatedStringsInvalid()
{
var code =
"""
using System;
class TestClass
{
static void Test(string[] args)
{
Console.WriteLine([|$"Text{0}"|]);
Console.WriteLine($"Text{0}");
}
}
""";
var expected =
"""
using System;
class TestClass
{
static void Test(string[] args)
{
var {|Rename:value|} = $"Text{0}";
Console.WriteLine(value);
Console.WriteLine(value);
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/909152")]
public async Task TestMissingOnNullLiteral()
{
await TestMissingInRegularAndScriptAsync(
"""
class C1
{
}
class C2
{
}
class Test
{
void M()
{
C1 c1 = [|null|];
C2 c2 = null;
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1130990")]
public async Task InParentConditionalAccessExpressions()
{
var code =
"""
using System;
class C
{
public T F<T>(T x)
{
var y = [|F(new C())|]?.F(new C())?.F(new C());
return x;
}
}
""";
var expected =
"""
using System;
class C
{
public T F<T>(T x)
{
var {|Rename:c|} = F(new C());
var y = c?.F(new C())?.F(new C());
return x;
}
}
""";
await TestInRegularAndScriptAsync(code, expected, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1130990")]
public async Task InParentConditionalAccessExpression2()
{
var code =
"""
using System;
class C
{
public T F<T>(T x)
{
var y = [|F(new C()).F(new C())|]?.F(new C());
return x;
}
}
""";
var expected =
"""
using System;
class C
{
public T F<T>(T x)
{
var {|Rename:c|} = F(new C()).F(new C());
var y = c?.F(new C());
return x;
}
}
""";
await TestInRegularAndScriptAsync(code, expected, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1130990")]
[WorkItem("https://github.com/dotnet/roslyn/issues/3110")]
public async Task MissingAcrossMultipleParentConditionalAccessExpressions()
{
await TestMissingInRegularAndScriptAsync(
"""
using System;
class C
{
public T F<T>(T x)
{
var y = [|F(new C())?.F(new C())|]?.F(new C());
return x;
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1130990")]
public async Task MissingOnInvocationExpressionInParentConditionalAccessExpressions()
{
await TestMissingInRegularAndScriptAsync(
"""
using System;
class C
{
public T F<T>(T x)
{
var y = F(new C())?.[|F(new C())|]?.F(new C());
return x;
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1130990")]
public async Task MissingOnMemberBindingExpressionInParentConditionalAccessExpressions()
{
await TestMissingInRegularAndScriptAsync(
"""
using System;
class C
{
static void Test(string s)
{
var l = s?.[|Length|] ?? 0;
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/3147")]
public async Task HandleFormattableStringTargetTyping1()
{
const string code = CodeSnippets.FormattableStringType + """
namespace N
{
using System;
class C
{
public async Task M()
{
var f = FormattableString.Invariant([|$""|]);
}
}
}
""";
const string expected = CodeSnippets.FormattableStringType + """
namespace N
{
using System;
class C
{
public async Task M()
{
FormattableString {|Rename:formattable|} = $"";
var f = FormattableString.Invariant(formattable);
}
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/49720")]
public async Task HandleIFormattableTargetTyping1()
{
const string code = """
namespace N
{
using System;
class C
{
public async Task M()
{
M([|$""|]);
void M(IFormattable f) {}
}
}
}
""";
const string expected = """
namespace N
{
using System;
class C
{
public async Task M()
{
IFormattable {|Rename:f|} = $"";
M(f);
void M(IFormattable f) {}
}
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/936")]
public async Task InAutoPropertyInitializer()
{
var code =
"""
using System;
class C
{
int Prop1 { get; } = [|1 + 2|];
}
""";
var expected =
"""
using System;
class C
{
private const int {|Rename:V|} = 1 + 2;
int Prop1 { get; } = V;
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/936")]
public async Task InAutoPropertyInitializer2()
{
var code =
"""
using System;
class C
{
public DateTime TimeStamp { get; } = [|DateTime.UtcNow|];
}
""";
var expected =
"""
using System;
class C
{
private static readonly DateTime {|Rename:utcNow|} = DateTime.UtcNow;
public DateTime TimeStamp { get; } = utcNow;
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/936")]
public async Task BlockContextPreferredOverAutoPropertyInitializerContext()
{
var code =
"""
using System;
class C
{
Func<int, int> X { get; } = a => { return [|7|]; };
}
""";
var expected =
"""
using System;
class C
{
Func<int, int> X { get; } = a => { const int {|Rename:V|} = 7; return V; };
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 2);
}
[Fact]
public async Task Tuple_TuplesDisabled()
{
var code =
"""
class C
{
var i = [|(1, "hello")|].ToString();
}
""";
var expected =
"""
class C
{
private static readonly (int, string) {|Rename:value|} = (1, "hello");
var i = value.ToString();
}
""";
await TestAsync(code, expected, parseOptions: TestOptions.Regular.WithLanguageVersion(LanguageVersion.CSharp6));
}
[Fact]
public async Task ElementOfTuple()
{
var code =
"""
class C
{
var i = (1, [|"hello"|]).ToString();
}
""";
var expected =
"""
class C
{
private const string {|Rename:V|} = "hello";
var i = (1, V).ToString();
}
""";
await TestInRegularAndScriptAsync(
code, expected);
}
[Fact]
public async Task Tuple_IntroduceConstant()
{
var code =
"""
class C
{
var i = [|(1, "hello")|].ToString();
}
""";
var expected =
"""
class C
{
private static readonly (int, string) {|Rename:value|} = (1, "hello");
var i = value.ToString();
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task TupleWithNames_IntroduceConstant()
{
var code =
"""
class C
{
var i = [|(a: 1, b: "hello")|].ToString();
}
""";
var expected =
"""
class C
{
private static readonly (int a, string b) {|Rename:value|} = (a: 1, b: "hello");
var i = value.ToString();
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task Tuple_IntroduceConstantForAllOccurrences()
{
var code =
"""
class C
{
var i = [|(1, "hello")|].ToString() + (1, "hello").ToString();
}
""";
var expected =
"""
class C
{
private static readonly (int, string) {|Rename:value|} = (1, "hello");
var i = value.ToString() + value.ToString();
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1);
}
[Fact]
public async Task TupleWithNames_IntroduceConstantForAllOccurrences()
{
var code =
"""
class C
{
var i = [|(a: 1, b: "hello")|].ToString() + (a: 1, b: "hello").ToString();
}
""";
var expected =
"""
class C
{
private static readonly (int a, string b) {|Rename:value|} = (a: 1, b: "hello");
var i = value.ToString() + value.ToString();
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1);
}
[Fact]
public async Task TupleWithDifferentNames_IntroduceConstantForAllOccurrences()
{
var code =
"""
class C
{
var i = [|(a: 1, b: "hello")|].ToString() + (c: 1, d: "hello").ToString();
}
""";
var expected =
"""
class C
{
private static readonly (int a, string b) {|Rename:value|} = (a: 1, b: "hello");
var i = value.ToString() + (c: 1, d: "hello").ToString();
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1);
}
[Fact]
public async Task TupleWithOneName_IntroduceConstantForAllOccurrences()
{
var code =
"""
class C
{
var i = [|(a: 1, "hello")|].ToString() + (a: 1, "hello").ToString();
}
""";
var expected =
"""
class C
{
private static readonly (int a, string) {|Rename:value|} = (a: 1, "hello");
var i = value.ToString() + value.ToString();
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1);
// no third action available
await TestActionCountAsync(code, count: 2, parameters: new TestParameters(TestOptions.Regular));
}
[Fact]
public async Task Tuple_IntroduceLocalForAllOccurrences()
{
// Cannot refactor tuple as local constant
await TestActionCountAsync(
"""
class C
{
void Goo()
{
Bar([|(1, "hello")|]);
Bar((1, "hello");
}
}
""", count: 2);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/11777")]
public async Task TestGenerateLocalConflictingName1()
{
await TestInRegularAndScriptAsync(
"""
class Program
{
class MySpan { public int Start { get; } public int End { get; } }
void Method(MySpan span)
{
int pos = span.Start;
while (pos < [|span.End|])
{
int spanEnd = span.End;
int end = pos;
}
}
}
""",
"""
class Program
{
class MySpan { public int Start { get; } public int End { get; } }
void Method(MySpan span)
{
int pos = span.Start;
int {|Rename:end1|} = span.End;
while (pos < end1)
{
int spanEnd = span.End;
int end = pos;
}
}
}
""");
}
[Fact]
public async Task TupleWithInferredName_LeaveExplicitName()
{
var code =
"""
class C
{
static int y = 2;
void M()
{
int a = 1;
var t = (a, x: [|C.y|]);
}
}
""";
var expected =
"""
class C
{
static int y = 2;
void M()
{
int a = 1;
int {|Rename:y1|} = C.y;
var t = (a, x: y1);
}
}
""";
await TestAsync(code, expected, parseOptions: TestOptions.Regular.WithLanguageVersion(LanguageVersion.Latest));
}
[Fact]
public async Task TupleWithInferredName_InferredNameBecomesExplicit()
{
var code =
"""
class C
{
static int y = 2;
void M()
{
int x = 1;
var t = (x, [|C.y|]);
}
}
""";
var expected =
"""
class C
{
static int y = 2;
void M()
{
int x = 1;
int {|Rename:y1|} = C.y;
var t = (x, y: y1);
}
}
""";
await TestAsync(code, expected, parseOptions: TestOptions.Regular.WithLanguageVersion(LanguageVersion.Latest));
}
[Fact]
public async Task TupleWithInferredName_AllOccurrences()
{
var code =
"""
class C
{
static int y = 2;
void M()
{
int x = 1;
var t = (x, [|C.y|]);
var t2 = (C.y, x);
}
}
""";
var expected =
"""
class C
{
static int y = 2;
void M()
{
int x = 1;
int {|Rename:y1|} = C.y;
var t = (x, y: y1);
var t2 = (y: y1, x);
}
}
""";
await TestAsync(code, expected, index: 1, parseOptions: TestOptions.Regular.WithLanguageVersion(LanguageVersion.Latest));
}
[Fact]
public async Task TupleWithInferredName_NoDuplicateNames()
{
var code =
"""
class C
{
static int y = 2;
void M()
{
int x = 1;
var t = (C.y, [|C.y|]);
}
}
""";
var expected =
"""
class C
{
static int y = 2;
void M()
{
int x = 1;
int {|Rename:y1|} = C.y;
var t = (y1, y1);
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1);
}
[Fact]
public async Task AnonymousTypeWithInferredName_LeaveExplicitName()
{
var code =
"""
class C
{
static int y = 2;
void M()
{
int a = 1;
var t = new { a, x= [|C.y|] };
}
}
""";
var expected =
"""
class C
{
static int y = 2;
void M()
{
int a = 1;
int {|Rename:y1|} = C.y;
var t = new { a, x= y1 };
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task AnonymousTypeWithInferredName_InferredNameBecomesExplicit()
{
var code =
"""
class C
{
static int y = 2;
void M()
{
int x = 1;
var t = new { x, [|C.y|] };
}
}
""";
var expected =
"""
class C
{
static int y = 2;
void M()
{
int x = 1;
int {|Rename:y1|} = C.y;
var t = new { x, y = y1 };
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task AnonymousTypeWithInferredName_NoDuplicatesAllowed()
{
var code =
"""
class C
{
static int y = 2;
void M()
{
int x = 1;
var t = new { C.y, [|C.y|] }; // this is an error already
}
}
""";
var expected =
"""
class C
{
static int y = 2;
void M()
{
int x = 1;
int {|Rename:y1|} = C.y;
var t = new { y= y1, y= y1 }; // this is an error already
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/31795")]
public async Task TestInAnonymousObjectMemberDeclaratorWithInferredType()
{
var code =
"""
using System;
using System.Collections.Generic;
using System.Linq;
class C
{
void Test(Dictionary<int, List<Guid>> d)
{
_ = new
{
a = [|d.Values|].Where(l => l.Count == 1)
};
}
}
""";
var expected =
"""
using System;
using System.Collections.Generic;
using System.Linq;
class C
{
void Test(Dictionary<int, List<Guid>> d)
{
Dictionary<int, List<Guid>>.ValueCollection {|Rename:values|} = d.Values;
_ = new
{
a = values.Where(l => l.Count == 1)
};
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/2423")]
public async Task TestPickNameBasedOnArgument1()
{
await TestInRegularAndScriptAsync(
"""
class C
{
public C(string a, string b)
{
new TextSpan([|int.Parse(a)|], int.Parse(b));
}
}
struct TextSpan
{
public TextSpan(int start, int length)
{
}
}
""",
"""
class C
{
public C(string a, string b)
{
int {|Rename:start|} = int.Parse(a);
new TextSpan(start, int.Parse(b));
}
}
struct TextSpan
{
public TextSpan(int start, int length)
{
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/2423")]
public async Task TestPickNameBasedOnArgument2()
{
await TestInRegularAndScriptAsync(
"""
class C
{
public C(string a, string b)
{
new TextSpan(int.Parse(a), [|int.Parse(b)|]);
}
}
struct TextSpan
{
public TextSpan(int start, int length)
{
}
}
""",
"""
class C
{
public C(string a, string b)
{
int {|Rename:length|} = int.Parse(b);
new TextSpan(int.Parse(a), length);
}
}
struct TextSpan
{
public TextSpan(int start, int length)
{
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/21665")]
public async Task TestPickNameBasedOnValueTupleFieldName1()
{
await TestAsync(
"""
using System;
class C
{
public C(string a, string b)
{
var tuple = (id: 1, date: [|DateTime.Now.ToString()|]);
}
}
""",
"""
using System;
class C
{
public C(string a, string b)
{
string {|Rename:date|} = DateTime.Now.ToString();
var tuple = (id: 1, date: date);
}
}
""", parseOptions: TestOptions.Regular.WithLanguageVersion(LanguageVersion.Latest));
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/21665")]
public async Task TestPickNameBasedOnValueTupleFieldName2()
{
await TestAsync(
"""
using System;
class C
{
public C()
{
var tuple = (key: 1, value: [|1 + 1|]);
}
}
""",
"""
using System;
class C
{
private const int {|Rename:Value|} = 1 + 1;
public C()
{
var tuple = (key: 1, value: Value);
}
}
""", parseOptions: TestOptions.Regular.WithLanguageVersion(LanguageVersion.Latest), index: 0);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/21665")]
public async Task TestPickNameBasedOnValueTupleFieldName3()
{
await TestAsync(
"""
using System;
class C
{
public C()
{
var tuple = (key: 1, value: [|1 + 1|]);
}
}
""",
"""
using System;
class C
{
public C()
{
const int {|Rename:Value|} = 1 + 1;
var tuple = (key: 1, value: Value);
}
}
""", parseOptions: TestOptions.Regular.WithLanguageVersion(LanguageVersion.Latest), index: 2);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/21373")]
public async Task TestInAttribute()
{
await TestInRegularAndScriptAsync(
"""
public class C
{
public string Goo { get; set; }
[Example([|2+2|])]
public string Bar { get; set; }
}
""",
"""
public class C
{
private const int {|Rename:V|} = 2 + 2;
public string Goo { get; set; }
[Example(V)]
public string Bar { get; set; }
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/21687")]
public async Task TestIfClassHasSameNameAsNamespace()
{
await TestInRegularAndScriptAsync(
"""
namespace C
{
class C
{
void M()
{
var t = new { foo = [|1 + 1|] };
}
}
}
""",
"""
namespace C
{
class C
{
private const int {|Rename:V|} = 1 + 1;
void M()
{
var t = new { foo = V };
}
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/10123")]
public async Task TestSimpleParameterName()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void M(int a)
{
System.Console.Write([|a|]);
}
}
""",
"""
class C
{
void M(int a)
{
int {|Rename:a1|} = a;
System.Console.Write(a1);
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/10123")]
public async Task TestSimpleParamterName_EmptySelection()
{
await TestMissingAsync(
"""
class C
{
void M(int a)
{
System.Console.Write([||]a);
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/10123")]
[WorkItem("https://github.com/dotnet/roslyn/issues/35525")]
public async Task TestSimpleParamterName_SmallSelection()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void M(int parameter)
{
System.Console.Write([|par|]ameter);
}
}
""",
"""
class C
{
void M(int parameter)
{
int {|Rename:parameter1|} = parameter;
System.Console.Write(parameter1);
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/10123")]
public async Task TestFieldName_QualifiedWithThis()
{
await TestInRegularAndScriptAsync(
"""
class C
{
int a;
void M()
{
System.Console.Write([|this.a|]);
}
}
""",
"""
class C
{
int a;
void M()
{
int {|Rename:a1|} = this.a;
System.Console.Write(a1);
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/10123")]
public async Task TestFieldName_QualifiedWithType()
{
await TestInRegularAndScriptAsync(
"""
class C
{
static int a;
void M()
{
System.Console.Write([|C.a|]);
}
}
""",
"""
class C
{
static int a;
void M()
{
int {|Rename:a1|} = C.a;
System.Console.Write(a1);
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/10123")]
public async Task TestFieldName_QualifiedWithType_TinySelection1()
{
// While one might argue that offering the refactoring in this case is not strictly correct the selection expression is
// unambiguous and there will be no other refactorings offered. Thus the cost of offering it very virtually non-existent.
await TestInRegularAndScriptAsync(
"""
class C
{
static int a;
void M()
{
System.Console.Write(C[|.|]a);
}
}
""",
"""
class C
{
static int a;
void M()
{
int {|Rename:a1|} = C.a;
System.Console.Write(a1);
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/10123")]
public async Task TestFieldName_QualifiedWithType_TinySelection2()
{
await TestMissingAsync(
"""
class C
{
static int a;
void M()
{
System.Console.Write([|C.|]a);
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/10123")]
public async Task TestFieldName_QualifiedWithType_TinySelection3()
{
await TestMissingAsync(
"""
class C
{
static int a;
void M()
{
System.Console.Write(C.[|a|]);
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/10123")]
public async Task TestFieldName_QualifiedWithType_EmptySelection()
{
await TestMissingAsync(
"""
class C
{
static int a;
void M()
{
System.Console.Write(C.[||]a);
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/25990")]
public async Task TestWithLineBreak()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void M()
{
int x = [|
5 * 2 |]
;
}
}
""",
"""
class C
{
private const int {|Rename:V|} = 5 * 2;
void M()
{
int x =
V
;
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/25990")]
public async Task TestWithLineBreak_AfterExpression()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void M()
{
int x =
[| 5 * 2
|] ;
}
}
""",
"""
class C
{
private const int {|Rename:V|} = 5 * 2;
void M()
{
int x =
V
;
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/25990")]
public async Task TestWithLineBreak_WithMultiLineComment()
{
await TestMissingAsync(
"""
class C
{
void M()
{
int x = // start [| comment
5 * 2 |]
;
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/25990")]
[WorkItem("https://github.com/dotnet/roslyn/issues/35525")]
public async Task TestWithLineBreak_WithSingleLineComments()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void M()
{
int x = /*comment1*/ [|
5 * 2 |]
;
}
}
""",
"""
class C
{
private const int {|Rename:V|} = 5 * 2;
void M()
{
int x = /*comment1*/
V
;
}
}
"""
);
}
[Fact]
public async Task TestIntroduceLocalInCallRefExpression()
{
// This test indicates that ref-expressions are l-values and
// introduce local still introduces a local, not a ref-local.
await TestInRegularAndScriptAsync("""
class C
{
void M(int x)
{
ref int y = ref x;
M2([|(y = ref x)|]);
}
void M2(int p) { }
}
""", """
class C
{
void M(int x)
{
ref int y = ref x;
int {|Rename:p|} = (y = ref x);
M2(p);
}
void M2(int p) { }
}
""");
}
[Fact]
public async Task TestIntroduceLocalInRefCallRefExpression()
{
// Cannot extract expressions passed by ref
await TestMissingInRegularAndScriptAsync("""
class C
{
void M(int x)
{
ref int y = ref x;
M2(ref [|(y = ref x)|]);
}
void M2(ref int p) { }
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/28266")]
public async Task TestCaretAtEndOfExpression1()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void Goo()
{
Bar(1[||], 2);
}
}
""",
"""
class C
{
private const int {|Rename:V|} = 1;
void Goo()
{
Bar(V, 2);
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/28266")]
public async Task TestCaretAtEndOfExpression2()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void Goo()
{
Bar(1, 2[||]);
}
}
""",
"""
class C
{
private const int {|Rename:V|} = 2;
void Goo()
{
Bar(1, V);
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/28266")]
public async Task TestCaretAtEndOfExpression3()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void Goo()
{
Bar(1, (2[||]));
}
}
""",
"""
class C
{
private const int {|Rename:V|} = (2);
void Goo()
{
Bar(1, V);
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/28266")]
public async Task TestCaretAtEndOfExpression4()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void Goo()
{
Bar(1, Bar(2[||]));
}
}
""",
"""
class C
{
private const int {|Rename:V|} = 2;
void Goo()
{
Bar(1, Bar(V));
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/27949")]
public async Task TestWhitespaceSpanInAssignment()
{
await TestMissingAsync("""
class C
{
int x = [| |] 0;
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/28665")]
public async Task TestWhitespaceSpanInAttribute()
{
await TestMissingAsync("""
class C
{
[Example( [| |] )]
public void Goo()
{
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/28941")]
public async Task TestElementAccessExpression()
{
await TestInRegularAndScriptAsync(
"""
using System;
class C
{
byte[] getArray() => null;
void test()
{
var goo = [|getArray()|][0];
}
}
""",
"""
using System;
class C
{
byte[] getArray() => null;
void test()
{
byte[] {|Rename:bytes|} = getArray();
var goo = bytes[0];
}
}
""");
}
[Fact]
public async Task TestIndexExpression()
{
var code = TestSources.Index + """
class Program
{
static void Main(string[] args)
{
System.Console.WriteLine([|^1|]);
}
}
""";
var expected = TestSources.Index + """
class Program
{
static void Main(string[] args)
{
System.Index {|Rename:value|} = ^1;
System.Console.WriteLine(value);
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task TestRangeExpression_None()
{
var code = TestSources.Index + TestSources.Range + """
class Program
{
static void Main(string[] args)
{
System.Console.WriteLine([|..|]);
}
}
""";
var expected = TestSources.Index + TestSources.Range + """
class Program
{
static void Main(string[] args)
{
System.Range {|Rename:value|} = ..;
System.Console.WriteLine(value);
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task TestRangeExpression_Right()
{
var code = TestSources.Index + TestSources.Range + """
class Program
{
static void Main(string[] args)
{
System.Console.WriteLine([|..1|]);
}
}
""";
var expected = TestSources.Index + TestSources.Range + """
class Program
{
static void Main(string[] args)
{
System.Range {|Rename:value|} = ..1;
System.Console.WriteLine(value);
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task TestRangeExpression_Left()
{
var code = TestSources.Index + TestSources.Range + """
class Program
{
static void Main(string[] args)
{
System.Console.WriteLine([|1..|]);
}
}
""";
var expected = TestSources.Index + TestSources.Range + """
class Program
{
static void Main(string[] args)
{
System.Range {|Rename:value|} = 1..;
System.Console.WriteLine(value);
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact]
public async Task TestRangeExpression_Both()
{
var code = TestSources.Index + TestSources.Range + """
class Program
{
static void Main(string[] args)
{
System.Console.WriteLine([|1..2|]);
}
}
""";
var expected = TestSources.Index + TestSources.Range + """
class Program
{
static void Main(string[] args)
{
System.Range {|Rename:value|} = 1..2;
System.Console.WriteLine(value);
}
}
""";
await TestInRegularAndScriptAsync(code, expected);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/30207")]
public async Task TestImplicitRecursiveInstanceMemberAccess_ForAllOccurrences()
{
var code =
"""
class C
{
C c;
void Test()
{
var x = [|c|].c.c;
}
}
""";
var expected =
"""
class C
{
C c;
void Test()
{
C {|Rename:c1|} = c;
var x = c1.c.c;
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/30207")]
public async Task TestExplicitRecursiveInstanceMemberAccess_ForAllOccurrences()
{
var code =
"""
class C
{
C c;
void Test()
{
var x = [|this.c|].c.c;
}
}
""";
var expected =
"""
class C
{
C c;
void Test()
{
C {|Rename:c1|} = this.c;
var x = c1.c.c;
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/30207")]
public async Task TestExplicitInstanceMemberAccess_ForAllOccurrences()
{
var code =
"""
class C
{
C c;
void Test(C arg)
{
var x = [|this.c|].Test(this.c);
}
}
""";
var expected =
"""
class C
{
C c;
void Test(C arg)
{
C {|Rename:c1|} = this.c;
var x = c1.Test(c1);
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/30207")]
public async Task TestImplicitInstanceMemberAccess_ForAllOccurrences()
{
var code =
"""
class C
{
C c;
void Test(C arg)
{
var x = [|c|].Test(c);
}
}
""";
var expected =
"""
class C
{
C c;
void Test(C arg)
{
C {|Rename:c1|} = c;
var x = c1.Test(c1);
}
}
""";
await TestInRegularAndScriptAsync(code, expected, index: 1);
}
[Fact, WorkItem("http://github.com/dotnet/roslyn/issues/30207")]
public async Task TestExpressionOfUndeclaredType()
{
var code =
"""
class C
{
void Test()
{
A[] array = [|A|].Foo();
foreach (A a in array)
{
}
}
}
""";
await TestMissingAsync(code);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40209")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_Method()
{
await TestInRegularAndScriptAsync(
"""
class Program
{
void M(int i)
{
var x = i.ToString();
Local();
void Local()
{
var y = [|i.ToString();|]
}
}
}
""",
"""
class Program
{
void M(int i)
{
var {|Rename:v|} = i.ToString();
var x = v;
Local();
void Local()
{
var y = v;
}
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40209")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_Property()
{
await TestInRegularAndScriptAsync(
"""
class Program
{
public int TestProperty
{
get => 10;
set
{
int i = 10;
var x = i.ToString();
Local();
void Local()
{
var y = [|i.ToString()|];
}
}
}
}
""",
"""
class Program
{
public int TestProperty
{
get => 10;
set
{
int i = 10;
var {|Rename:v|} = i.ToString();
var x = v;
Local();
void Local()
{
var y = v;
}
}
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40209")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_ForLoop()
{
await TestInRegularAndScriptAsync(
"""
class Program
{
public int TestProperty
{
get => 10;
set
{
int i = 10;
var x = i.ToString();
Local();
void Local()
{
for (int j = 0; j < 5; j++)
{
var y = [|i.ToString();|]
}
}
}
}
}
""",
"""
class Program
{
public int TestProperty
{
get => 10;
set
{
int i = 10;
var {|Rename:v|} = i.ToString();
var x = v;
Local();
void Local()
{
for (int j = 0; j < 5; j++)
{
var y = v;
}
}
}
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40209")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_NestedLocalFunction()
{
await TestInRegularAndScriptAsync(
"""
class Program
{
void M(int i)
{
var x = i.ToString();
Local();
void Local()
{
void Local()
{
var y = [|i.ToString();|]
}
var z = i.ToString();
}
}
}
""",
"""
class Program
{
void M(int i)
{
var {|Rename:v|} = i.ToString();
var x = v;
Local();
void Local()
{
void Local()
{
var y = v;
}
var z = v;
}
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40209")]
public async Task TestIntroduceFromStaticLocalFunction_AllOccurences_NestedLocalFunction()
{
await TestInRegularAndScriptAsync(
"""
class Program
{
void M(int i)
{
var x = i.ToString();
Local();
void Local()
{
static void Local()
{
var y = [|i.ToString();|]
}
var z = i.ToString();
}
}
}
""",
"""
class Program
{
void M(int i)
{
var x = i.ToString();
Local();
void Local()
{
static void Local()
{
var {|Rename:v|} = i.ToString();
var y = v;
}
var z = i.ToString();
}
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40209")]
public async Task TestIntroduceFromStaticLocalFunction_AllOccurences_Method()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
void M(int i)
{
var x = Foo();
Local();
static void Local()
{
var y = [|Foo()|];
}
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""",
"""
using System;
class Program
{
void M(int i)
{
var x = Foo();
Local();
static void Local()
{
var {|Rename:v|} = Foo();
var y = v;
}
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40209")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_SingleMatch()
{
await TestInRegularAndScriptAsync(
"""
class Program
{
void M(int i)
{
Local();
void Local()
{
var y = [|i.ToString();|]
}
}
}
""",
"""
class Program
{
void M(int i)
{
Local();
void Local()
{
var {|Rename:v|} = i.ToString();
var y = v;
}
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40209")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_MultipleMatches()
{
await TestInRegularAndScriptAsync(
"""
class Program
{
void M(int i)
{
Local();
void Local()
{
var x = [|i.ToString();|]
var y = i.ToString();
}
}
}
""",
"""
class Program
{
void M(int i)
{
Local();
void Local()
{
var {|Rename:v|} = i.ToString();
var x = v;
var y = v;
}
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40209")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_MultipleMatches2()
{
await TestInRegularAndScriptAsync(
"""
class Program
{
void M(int i)
{
Local();
void Local()
{
var x = i.ToString();
var y = [|i.ToString();|]
}
}
}
""",
"""
class Program
{
void M(int i)
{
Local();
void Local()
{
var {|Rename:v|} = i.ToString();
var x = v;
var y = v;
}
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40374")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_LocalFunctionCall()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Bug
{
void M(int i)
{
Local();
var x = Foo();
void Local()
{
var y = [|Foo();|]
}
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""",
"""
using System;
class Bug
{
void M(int i)
{
var {|Rename:v|} = Foo();
Local();
var x = v;
void Local()
{
var y = v;
}
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40374")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_LocalFunctionCall2()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Bug
{
void M(int i)
{
void Local()
{
var y = [|Foo();|]
}
Local();
var x = Foo();
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""",
"""
using System;
class Bug
{
void M(int i)
{
var {|Rename:v|} = Foo();
void Local()
{
var y = v;
}
Local();
var x = v;
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40374")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_LocalFunctionCall3()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Bug
{
void M(int i)
{
var s = 5;
void Local()
{
var z = 10;
var y = [|Foo();|]
}
Local();
var x = Foo();
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""",
"""
using System;
class Bug
{
void M(int i)
{
var s = 5;
var {|Rename:v|} = Foo();
void Local()
{
var z = 10;
var y = v;
}
Local();
var x = v;
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40374")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_MultipleLocalFunctionCalls()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Bug
{
void M(int i)
{
Local();
var s = 5;
void Local()
{
var z = 10;
var y = [|Foo();|]
}
Local();
var x = Foo();
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""",
"""
using System;
class Bug
{
void M(int i)
{
var {|Rename:v|} = Foo();
Local();
var s = 5;
void Local()
{
var z = 10;
var y = v;
}
Local();
var x = v;
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40374")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_NestedLocalFunctionCalls()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Bug
{
void M0()
{
void M(int i)
{
Local();
var s = 5;
void Local()
{
var z = 10;
var y = [|Foo();|]
}
Local();
var x = Foo();
}
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""",
"""
using System;
class Bug
{
void M0()
{
void M(int i)
{
var {|Rename:v|} = Foo();
Local();
var s = 5;
void Local()
{
var z = 10;
var y = v;
}
Local();
var x = v;
}
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40374")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_MultipleLocalFunctions()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Bug
{
void M(int i)
{
Local();
Local2();
var s = 5;
void Local2()
{
var w = Foo();
}
void Local()
{
var z = 10;
var y = [|Foo();|]
}
Local();
var x = Foo();
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""",
"""
using System;
class Bug
{
void M(int i)
{
var {|Rename:v|} = Foo();
Local();
Local2();
var s = 5;
void Local2()
{
var w = v;
}
void Local()
{
var z = 10;
var y = v;
}
Local();
var x = v;
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40374")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_MultipleLocalFunctions2()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Bug
{
void M(int i)
{
var s = 5;
void Local2()
{
var w = Foo();
}
void Local()
{
var z = 10;
var y = [|Foo();|]
}
Local();
var x = Foo();
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""",
"""
using System;
class Bug
{
void M(int i)
{
var s = 5;
var {|Rename:v|} = Foo();
void Local2()
{
var w = v;
}
void Local()
{
var z = 10;
var y = v;
}
Local();
var x = v;
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40374")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_NoLocalFunctionCall()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Bug
{
void M(int i)
{
var s = 5;
void Local()
{
var z = 10;
var y = [|Foo();|]
}
var x = Foo();
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""",
"""
using System;
class Bug
{
void M(int i)
{
var s = 5;
var {|Rename:v|} = Foo();
void Local()
{
var z = 10;
var y = v;
}
var x = v;
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40374")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_ExpressionBodiedLocalFunction()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Bug
{
void M(int i)
{
Local();
var s = 5;
object y;
void Local() => y = Foo();
var x = [|Foo();|]
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""",
"""
using System;
class Bug
{
void M(int i)
{
var {|Rename:v|} = Foo();
Local();
var s = 5;
object y;
void Local() => y = v;
var x = v;
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40374")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_ExpressionBodiedLocalFunction2()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Bug
{
void M(int i)
{
var s = 5;
object y;
void Local() => y = Foo();
Local();
var x = [|Foo();|]
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""",
"""
using System;
class Bug
{
void M(int i)
{
var s = 5;
object y;
var {|Rename:v|} = Foo();
void Local() => y = v;
Local();
var x = v;
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40374")]
public async Task TestIntroduceFromNonStaticLocalFunction_AllOccurences_SameMethodNames()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Bug
{
void M(int i)
{
var c = new C();
c.Local();
this.Local();
Local();
void Local()
{
var y = [|Foo();|]
}
var x = Foo();
}
private static object Foo()
{
throw new NotImplementedException();
}
private void Local()
{
}
}
class C
{
public void Local() { }
}
""",
"""
using System;
class Bug
{
void M(int i)
{
var c = new C();
c.Local();
this.Local();
var {|Rename:v|} = Foo();
Local();
void Local()
{
var y = v;
}
var x = v;
}
private static object Foo()
{
throw new NotImplementedException();
}
private void Local()
{
}
}
class C
{
public void Local() { }
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40381")]
public async Task TestIntroduceFromMethod_AllOccurences_DontIncludeStaticLocalFunctionReferences()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Bug
{
void M(int i)
{
Local();
static void Local()
{
var y = Foo();
}
var x = [|Foo()|];
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""",
"""
using System;
class Bug
{
void M(int i)
{
Local();
static void Local()
{
var y = Foo();
}
var {|Rename:v|} = Foo();
var x = v;
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40381")]
public async Task TestIntroduceFromMethod_AllOccurences_DontIncludeStaticLocalFunctionReferences2()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Bug
{
void M(int i)
{
var x = [|Foo()|];
Local();
static void Local()
{
var y = Foo();
}
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""",
"""
using System;
class Bug
{
void M(int i)
{
var {|Rename:v|} = Foo();
var x = v;
Local();
static void Local()
{
var y = Foo();
}
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40381")]
public async Task TestIntroduceFromMethod_AllOccurences_IncludeNonStaticLocalFunctionReferences()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Bug
{
void M(int i)
{
Local();
void Local()
{
var y = Foo();
}
var x = [|Foo()|];
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""",
"""
using System;
class Bug
{
void M(int i)
{
var {|Rename:v|} = Foo();
Local();
void Local()
{
var y = v;
}
var x = v;
}
private static object Foo()
{
throw new NotImplementedException();
}
}
""", index: 1, options: ImplicitTypingEverywhere());
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/561")]
public async Task DoNotGenerateBetweenElseAndIf()
{
await TestInRegularAndScriptAsync(
"""
class C
{
static void Main(string[] args)
{
if (true)
{
}
else if ([|args.Length|] == 0)
{
}
}
}
""",
"""
class C
{
static void Main(string[] args)
{
int {|Rename:length|} = args.Length;
if (true)
{
}
else if (length == 0)
{
}
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/12591")]
public async Task TestWhitespaceSelection1()
{
await TestInRegularAndScriptAsync(
"""
public class Class1
{
void M()
{
Foo(1,[| Bar()|]);
}
private void Foo(int v1, object v2)
{
}
private object Bar()
{
}
}
""",
"""
public class Class1
{
void M()
{
object {|Rename:v2|} = Bar();
Foo(1, v2);
}
private void Foo(int v1, object v2)
{
}
private object Bar()
{
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/56")]
public async Task TestGenerateNameForForeachExpression()
{
await TestInRegularAndScriptAsync(
"""
using System.Collections.Generic;
class Program
{
static void Main(string[] args)
{
foreach (var num in [|GetNumbers()|])
{
}
}
static IEnumerable<int> GetNumbers()
{
return new[] { 1, 2, 3 };
}
}
""",
"""
using System.Collections.Generic;
class Program
{
static void Main(string[] args)
{
IEnumerable<int> {|Rename:nums|} = GetNumbers();
foreach (var num in nums)
{
}
}
static IEnumerable<int> GetNumbers()
{
return new[] { 1, 2, 3 };
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/15770")]
public async Task TestKeepReplacementIndentation1()
{
await TestInRegularAndScriptAsync(
"""
class D
{
void C(int a)
{
C(
[|1 + 2|]);
}
}
""",
"""
class D
{
void C(int a)
{
const int {|Rename:A|} = 1 + 2;
C(
A);
}
}
""",
index: 3);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40745")]
public async Task TestKeepExistingNonTrivialCodeInLambda()
{
await TestInRegularAndScriptAsync(
"""
using System.IO;
using System.Threading.Tasks;
class C
{
void M()
{
Task.Run(() => File.Copy("src", [|Path.Combine("dir", "file")|]));
}
}
""",
"""
using System.IO;
using System.Threading.Tasks;
class C
{
void M()
{
Task.Run(() =>
{
string {|Rename:destFileName|} = Path.Combine("dir", "file");
File.Copy("src", destFileName);
});
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40745")]
public async Task TestIntroVarInActionSelectingInsideParens()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
void M()
{
Action<int> goo = x => ([|x.ToString()|]);
}
}
""",
"""
using System;
class Program
{
void M()
{
Action<int> goo = x =>
{
string {|Rename:v|} = x.ToString();
};
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40745")]
public async Task TestIntroVarInActionSelectingParens()
{
await TestInRegularAndScriptAsync(
"""
using System;
class Program
{
void M()
{
Action<int> goo = x => [|(x.ToString())|];
}
}
""",
"""
using System;
class Program
{
void M()
{
Action<int> goo = x =>
{
string {|Rename:v|} = (x.ToString());
};
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40745")]
public async Task TestMissingReturnStatementInAsyncTaskMethod()
{
await TestInRegularAndScriptAsync(
"""
using System;
using System.Threading.Tasks;
class Program
{
void M()
{
Func<int, Task> f = async x => await [|M2()|];
}
async Task M2()
{
}
}
""",
"""
using System;
using System.Threading.Tasks;
class Program
{
void M()
{
Func<int, Task> f = async x =>
{
Task {|Rename:task|} = M2();
await task;
};
}
async Task M2()
{
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40745")]
public async Task TestMissingReturnStatementInAsyncValueTaskMethod()
{
await TestInRegularAndScriptAsync(
"""
using System;
using System.Threading.Tasks;
namespace System.Threading.Tasks {
struct ValueTask
{
}
}
class Program
{
void M()
{
Func<int, ValueTask> f = async x => await [|M2()|];
}
async ValueTask M2()
{
}
}
""",
"""
using System;
using System.Threading.Tasks;
namespace System.Threading.Tasks {
struct ValueTask
{
}
}
class Program
{
void M()
{
Func<int, ValueTask> f = async x =>
{
ValueTask {|Rename:valueTask|} = M2();
await valueTask;
};
}
async ValueTask M2()
{
}
}
""");
}
[Fact]
public async Task TestReturnStatementInAsyncTaskTypeMethod()
{
await TestInRegularAndScriptAsync(
"""
using System;
using System.Threading.Tasks;
class Program
{
void M()
{
Func<int, Task<int>> f = async x => await [|M2()|];
}
async Task<int> M2()
{
return 0;
}
}
""",
"""
using System;
using System.Threading.Tasks;
class Program
{
void M()
{
Func<int, Task<int>> f = async x =>
{
Task<int> {|Rename:task|} = M2();
return await task;
};
}
async Task<int> M2()
{
return 0;
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/40745")]
public async Task TestReturnStatementInAsyncValueTaskTypeMethod()
{
await TestInRegularAndScriptAsync(
"""
using System;
using System.Threading.Tasks;
namespace System.Threading.Tasks {
struct ValueTask<T>
{
}
}
class Program
{
void M()
{
Func<int, ValueTask<int>> f = async x => await [|M2()|];
}
async ValueTask<int> M2()
{
return 0;
}
}
""",
"""
using System;
using System.Threading.Tasks;
namespace System.Threading.Tasks {
struct ValueTask<T>
{
}
}
class Program
{
void M()
{
Func<int, ValueTask<int>> f = async x =>
{
ValueTask<int> {|Rename:valueTask|} = M2();
return await valueTask;
};
}
async ValueTask<int> M2()
{
return 0;
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/44291")]
public async Task TestIntroduceWithAmbiguousExtensionClass()
{
await TestInRegularAndScriptAsync(
"""
<Workspace>
<Project Language="C#" AssemblyName="Assembly1" Name="P1" CommonReferences="true">
<Document>
public static class Extensions
{
public static void Goo(this string s) { }
}
</Document>
</Project>
<Project Language="C#" AssemblyName="Assembly2" Name="P2" CommonReferences="true">
<Document>
public static class Extensions
{
public static void Bar(this string s) { }
}
</Document>
</Project>
<Project Language="C#" AssemblyName="Assembly3" Name="P3" CommonReferences="true">
<ProjectReference>P1</ProjectReference>
<ProjectReference>P2</ProjectReference>
<Document>public class P
{
public void M(string s)
{
s.Bar([|$""|]);
}
}</Document>
</Project>
</Workspace>
""",
"""
public class P
{
private const string {|Rename:V|} = $"";
public void M(string s)
{
s.Bar(V);
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/44656")]
public async Task ImplicitObjectCreation()
{
await TestInRegularAndScriptAsync("""
class A
{
public void Create(A a, B b)
{
}
}
class B
{
void M()
{
new A().Create(new A(), [|new(1)|]);
}
}
""", """
class A
{
public void Create(A a, B b)
{
}
}
class B
{
void M()
{
B {|Rename:b|} = new(1);
new A().Create(new A(), b);
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52833")]
public async Task UniqueParameterName()
{
await TestInRegularAndScriptAsync("""
using System.IO;
public class SomeClass
{
public void Foo()
{
var somePath = Path.Combine("one", "two");
Other([|"someParam"|]);
}
public void Other(string path)
{
}
}
""",
"""
using System.IO;
public class SomeClass
{
public void Foo()
{
var somePath = Path.Combine("one", "two");
const string {|Rename:Path1|} = "someParam";
Other(Path1);
}
public void Other(string path)
{
}
}
""", 2);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/47772")]
public async Task DoNotIntroduceConstantForConstant_Local()
{
await TestMissingAsync(
"""
class C
{
void M()
{
const int foo = [|10|];
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/47772")]
public async Task DoNotIntroduceConstantForConstant_Member()
{
await TestMissingAsync(
"""
class C
{
const int foo = [|10|];
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/47772")]
public async Task DoNotIntroduceConstantForConstant_Parentheses()
{
await TestMissingAsync(
"""
class C
{
const int foo = ([|10|]);
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/47772")]
public async Task DoNotIntroduceConstantForConstant_NotForSubExpression()
{
await TestInRegularAndScriptAsync(
"""
class C
{
void M()
{
const int foo = [|10|] + 10;
}
}
""",
"""
class C
{
void M()
{
const int {|Rename:V|} = 10;
const int foo = V + 10;
}
}
""",
index: 2);
}
[Theory, Trait(Traits.Feature, Traits.Features.CodeActionsIntroduceLocalForExpression)]
[WorkItem("https://github.com/dotnet/roslyn/issues/61796")]
[InlineData("Task")]
[InlineData("ValueTask")]
public async Task IntroduceLocal_DoNotReturnForVoidTaskLikeTypes(string taskType)
{
await TestInRegularAndScriptAsync(
$$"""
using System;
using System.Threading.Tasks;
namespace ConsoleApp1
{
internal class Example1
{
private async {{taskType}} DoStuff() => await ConsumeAsync([|await TransformAsync("abc")|]);
private Task<object> TransformAsync(string v) => throw new NotImplementedException();
private Task ConsumeAsync(object value) => throw new NotImplementedException();
}
}
""" + ValueTaskDeclaration,
$$"""
using System;
using System.Threading.Tasks;
namespace ConsoleApp1
{
internal class Example1
{
private async {{taskType}} DoStuff()
{
object {|Rename:value|} = await TransformAsync("abc");
await ConsumeAsync(value);
}
private Task<object> TransformAsync(string v) => throw new NotImplementedException();
private Task ConsumeAsync(object value) => throw new NotImplementedException();
}
}
""" + ValueTaskDeclaration);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/28730")]
public async Task TestOnThis1()
{
await TestMissingAsync(
"""
sealed class C {
readonly string s;
public C(string s) {
[||]this.s = s;
}
}
""");
}
[Fact]
public async Task Lambda_OptionalParameters()
{
await TestInRegularAndScriptAsync(
"""
using System;
class C
{
void M()
{
H((int x = 1, int y = 2) [||]=> x + y);
}
static void H(Delegate d) { }
}
""",
"""
using System;
class C
{
void M()
{
var {|Rename:d|} = (int x = 1, int y = 2) => x + y;
H(d);
}
static void H(Delegate d) { }
}
""");
}
[Fact]
public async Task Lambda_ParamsArray()
{
await TestInRegularAndScriptAsync(
"""
using System;
class C
{
void M()
{
H((int x, params int[] xs) [||]=> xs.Length + x);
}
static void H(Delegate d) { }
}
""",
"""
using System;
class C
{
void M()
{
var {|Rename:d|} = (int x, params int[] xs) => xs.Length + x;
H(d);
}
static void H(Delegate d) { }
}
""");
}
}
}
|