|
// 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.Threading.Tasks;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.RemoveUnnecessaryImports;
using Microsoft.CodeAnalysis.Editor.UnitTests.CodeActions;
using Microsoft.CodeAnalysis.Shared.Extensions;
using Microsoft.CodeAnalysis.Test.Utilities;
using Microsoft.CodeAnalysis.Testing;
using Roslyn.Test.Utilities;
using Xunit;
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.RemoveUnnecessaryImports
{
using VerifyCS = CSharpCodeFixVerifier<
CSharpRemoveUnnecessaryImportsDiagnosticAnalyzer,
CSharpRemoveUnnecessaryImportsCodeFixProvider>;
[Trait(Traits.Feature, Traits.Features.CodeActionsRemoveUnnecessaryImports)]
public class RemoveUnnecessaryImportsTests
{
[Fact]
public async Task TestNoReferences()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|{|IDE0005:using System;
using System.Collections.Generic;
using System.Linq;|}|]
class Program
{
static void Main(string[] args)
{
}
}
""",
"""
class Program
{
static void Main(string[] args)
{
}
}
""");
}
[Fact]
public async Task TestNoReferencesWithCopyright()
{
await VerifyCS.VerifyCodeFixAsync(
"""
// Copyright (c) Somebody.
[|{|IDE0005:using System;
using System.Collections.Generic;
using System.Linq;|}|]
class Program
{
static void Main(string[] args)
{
}
}
""",
"""
// Copyright (c) Somebody.
class Program
{
static void Main(string[] args)
{
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/27006")]
public async Task TestReferencesWithCopyrightAndPreservableTrivia()
{
await VerifyCS.VerifyCodeFixAsync(
"""
// Copyright (c) Somebody.
[|using System;
{|IDE0005:using System.Collections.Generic;
// This is important
using System.Linq;|}|]
class Program
{
static void Main(string[] args)
{
Action a;
}
}
""",
"""
// Copyright (c) Somebody.
using System;
// This is important
class Program
{
static void Main(string[] args)
{
Action a;
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/27006")]
public async Task TestReferencesWithCopyrightAndGroupings()
{
await VerifyCS.VerifyCodeFixAsync(
"""
// Copyright (c) Somebody.
[|using System;
{|IDE0005:using System.Collections.Generic;
using System.Linq;|}|]
class Program
{
static void Main(string[] args)
{
Action a;
}
}
""",
"""
// Copyright (c) Somebody.
using System;
class Program
{
static void Main(string[] args)
{
Action a;
}
}
""");
}
[Fact]
public async Task TestIdentifierReferenceInTypeContext()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|using System;
{|IDE0005:using System.Collections.Generic;
using System.Linq;|}|]
class Program
{
static void Main(string[] args)
{
DateTime d;
}
}
""",
"""
using System;
class Program
{
static void Main(string[] args)
{
DateTime d;
}
}
""");
}
[Fact]
public async Task TestGeneratedCode()
{
var source = """
// <auto-generated/>
[|{|IDE0005_gen:using System;|}
using System.Collections.Generic;
{|IDE0005_gen:using System.Linq;|}|]
class Program
{
static void Main(string[] args)
{
List<int> d;
}
}
""";
var fixedSource = """
// <auto-generated/>
using System.Collections.Generic;
class Program
{
static void Main(string[] args)
{
List<int> d;
}
}
""";
// Fix All operations in generated code do not apply changes
var batchFixedSource = source;
await new VerifyCS.Test
{
TestCode = source,
FixedCode = fixedSource,
BatchFixedState =
{
Sources = { batchFixedSource },
MarkupHandling = MarkupMode.Allow,
},
}.RunAsync();
}
[Fact]
public async Task TestGenericReferenceInTypeContext()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|{|IDE0005:using System;|}
using System.Collections.Generic;
{|IDE0005:using System.Linq;|}|]
class Program
{
static void Main(string[] args)
{
List<int> list;
}
}
""",
"""
using System.Collections.Generic;
class Program
{
static void Main(string[] args)
{
List<int> list;
}
}
""");
}
[Fact]
public async Task TestMultipleReferences()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|using System;
using System.Collections.Generic;
{|IDE0005:using System.Linq;|}|]
class Program
{
static void Main(string[] args)
{
List<int> list;
DateTime d;
}
}
""",
"""
using System;
using System.Collections.Generic;
class Program
{
static void Main(string[] args)
{
List<int> list;
DateTime d;
}
}
""");
}
[Fact]
public async Task TestExtensionMethodReference()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|{|IDE0005:using System;
using System.Collections.Generic;|}
using System.Linq;|]
class Program
{
static void Main(string[] args)
{
args.Where(a => a.Length > 10);
}
}
""",
"""
using System.Linq;
class Program
{
static void Main(string[] args)
{
args.Where(a => a.Length > 10);
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/541827")]
public async Task TestExtensionMethodLinq()
{
// NOTE: Intentionally not running this test with Script options, because in Script,
// NOTE: class "Goo" is placed inside the script class, and can't be seen by the extension
// NOTE: method Select, which is not inside the script class.
var code = """
using System;
using System.Collections;
using SomeNS;
class Program
{
static void Main()
{
Goo qq = new Goo();
IEnumerable x = from q in qq
select q;
}
}
public class Goo
{
public Goo()
{
}
}
namespace SomeNS
{
public static class SomeClass
{
public static IEnumerable Select(this Goo o, Func<object, object> f)
{
return null;
}
}
}
""";
await VerifyCS.VerifyCodeFixAsync(code, code);
}
[Fact]
public async Task TestAliasQualifiedAliasReference()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|{|IDE0005:using System;|}
using G = System.Collections.Generic;
{|IDE0005:using System.Linq;|}|]
class Program
{
static void Main(string[] args)
{
G::List<int> list;
}
}
""",
"""
using G = System.Collections.Generic;
class Program
{
static void Main(string[] args)
{
G::List<int> list;
}
}
""");
}
[Fact]
public async Task TestQualifiedAliasReference()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|{|IDE0005:using System;|}
using G = System.Collections.Generic;|]
class Program
{
static void Main(string[] args)
{
G.List<int> list;
}
}
""",
"""
using G = System.Collections.Generic;
class Program
{
static void Main(string[] args)
{
G.List<int> list;
}
}
""");
}
[Fact]
public async Task TestNestedUnusedUsings()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|{|IDE0005:using System;
using System.Collections.Generic;
using System.Linq;|}|]
namespace N
{
using System;
class Program
{
static void Main(string[] args)
{
DateTime d;
}
}
}
""",
"""
namespace N
{
using System;
class Program
{
static void Main(string[] args)
{
DateTime d;
}
}
}
""");
}
[Fact]
public async Task TestNestedUnusedUsings_FileScopedNamespace()
{
await new VerifyCS.Test
{
TestCode =
"""
[|{|IDE0005:using System;
using System.Collections.Generic;
using System.Linq;|}|]
namespace N;
using System;
class Program
{
static void Main(string[] args)
{
DateTime d;
}
}
""",
FixedCode =
"""
namespace N;
using System;
class Program
{
static void Main(string[] args)
{
DateTime d;
}
}
""",
LanguageVersion = LanguageVersion.CSharp10,
}.RunAsync();
}
[Fact]
public async Task TestNestedUsedUsings()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|using System;
{|IDE0005:using System.Collections.Generic;
using System.Linq;|}|]
namespace N
{
using System;
class Program
{
static void Main(string[] args)
{
DateTime d;
}
}
}
class F
{
DateTime d;
}
""",
"""
using System;
namespace N
{
using System;
class Program
{
static void Main(string[] args)
{
DateTime d;
}
}
}
class F
{
DateTime d;
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/712656")]
public async Task TestNestedUsedUsings2()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|using System;
{|IDE0005:using System.Collections.Generic;
using System.Linq;|}|]
namespace N
{
[|using System;
{|IDE0005:using System.Collections.Generic;|}|]
class Program
{
static void Main(string[] args)
{
DateTime d;
}
}
}
class F
{
DateTime d;
}
""",
"""
using System;
namespace N
{
using System;
class Program
{
static void Main(string[] args)
{
DateTime d;
}
}
}
class F
{
DateTime d;
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/712656")]
public async Task TestNestedUsedUsings2_FileScopedNamespace()
{
await new VerifyCS.Test
{
TestCode =
"""
[|{|IDE0005:using System;
using System.Collections.Generic;
using System.Linq;|}|]
namespace N;
[|using System;
{|IDE0005:using System.Collections.Generic;|}|]
class Program
{
static void Main(string[] args)
{
DateTime d;
}
}
class F
{
DateTime d;
}
""",
FixedCode =
"""
namespace N;
using System;
class Program
{
static void Main(string[] args)
{
DateTime d;
}
}
class F
{
DateTime d;
}
""",
LanguageVersion = LanguageVersion.CSharp10,
}.RunAsync();
}
[Fact]
public async Task TestAttribute()
{
var code = """
using SomeNamespace;
[SomeAttr]
class Goo
{
}
namespace SomeNamespace
{
public class SomeAttrAttribute : System.Attribute
{
}
}
""";
await VerifyCS.VerifyCodeFixAsync(code, code);
}
[Fact]
public async Task TestAttributeArgument()
{
var code = """
using goo;
[SomeAttribute(typeof(SomeClass))]
class Program
{
static void Main()
{
}
}
public class SomeAttribute : System.Attribute
{
public SomeAttribute(object f)
{
}
}
namespace goo
{
public class SomeClass
{
}
}
""";
await VerifyCS.VerifyCodeFixAsync(code, code);
}
[Fact]
public async Task TestRemoveAllWithSurroundingPreprocessor()
{
await VerifyCS.VerifyCodeFixAsync(
"""
#if true
[|{|IDE0005:using System;
using System.Collections.Generic;|}|]
#endif
class Program
{
static void Main(string[] args)
{
}
}
""",
"""
#if true
#endif
class Program
{
static void Main(string[] args)
{
}
}
""");
}
[Fact]
public async Task TestRemoveFirstWithSurroundingPreprocessor()
{
await VerifyCS.VerifyCodeFixAsync(
"""
#if true
[|{|IDE0005:using System;|}
using System.Collections.Generic;|]
#endif
class Program
{
static void Main(string[] args)
{
List<int> list;
}
}
""",
"""
#if true
using System.Collections.Generic;
#endif
class Program
{
static void Main(string[] args)
{
List<int> list;
}
}
""");
}
[Fact]
public async Task TestRemoveAllWithSurroundingPreprocessor2()
{
await VerifyCS.VerifyCodeFixAsync(
"""
namespace N
{
#if true
[|{|IDE0005:using System;
using System.Collections.Generic;|}|]
#endif
class Program
{
static void Main(string[] args)
{
}
}
}
""",
"""
namespace N
{
#if true
#endif
class Program
{
static void Main(string[] args)
{
}
}
}
""");
}
[Fact]
public async Task TestRemoveOneWithSurroundingPreprocessor2()
{
await VerifyCS.VerifyCodeFixAsync(
"""
namespace N
{
#if true
[|{|IDE0005:using System;|}
using System.Collections.Generic;|]
#endif
class Program
{
static void Main(string[] args)
{
List<int> list;
}
}
}
""",
"""
namespace N
{
#if true
using System.Collections.Generic;
#endif
class Program
{
static void Main(string[] args)
{
List<int> list;
}
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/541817")]
public async Task TestComments8718()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|using Goo; {|IDE0005:using System.Collections.Generic; /*comment*/|} using Goo2;|]
class Program
{
static void Main(string[] args)
{
Bar q;
Bar2 qq;
}
}
namespace Goo
{
public class Bar
{
}
}
namespace Goo2
{
public class Bar2
{
}
}
""",
"""
using Goo;
using Goo2;
class Program
{
static void Main(string[] args)
{
Bar q;
Bar2 qq;
}
}
namespace Goo
{
public class Bar
{
}
}
namespace Goo2
{
public class Bar2
{
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/528609")]
public async Task TestComments()
{
await VerifyCS.VerifyCodeFixAsync(
"""
//c1
/*c2*/
{|IDE0005:[|using/*c3*/ System/*c4*/;|] //c5|}
//c6
class Program
{
}
""",
"""
//c1
/*c2*/
//c6
class Program
{
}
""");
}
[Fact]
public async Task TestUnusedUsing()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|{|IDE0005:using System.Collections.Generic;|}|]
class Program
{
static void Main()
{
}
}
""",
"""
class Program
{
static void Main()
{
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/541827")]
public async Task TestSimpleQuery()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|{|IDE0005:using System;
using System.Collections.Generic;|}
using System.Linq;|]
class Program
{
static void Main(string[] args)
{
var q = from a in args
where a.Length > 21
select a;
}
}
""",
"""
using System.Linq;
class Program
{
static void Main(string[] args)
{
var q = from a in args
where a.Length > 21
select a;
}
}
""");
}
[Fact]
public async Task TestUsingStaticClassAccessField1()
{
// Test intentionally uses 'using' instead of 'using static'
var testCode = """
[|{|IDE0005:using {|CS0138:SomeNS.Goo|};|}|]
class Program
{
static void Main()
{
var q = {|CS0103:x|};
}
}
namespace SomeNS
{
static class Goo
{
public static int x;
}
}
""";
var fixedCode = """
class Program
{
static void Main()
{
var q = {|CS0103:x|};
}
}
namespace SomeNS
{
static class Goo
{
public static int x;
}
}
""";
await new VerifyCS.Test
{
TestCode = testCode,
FixedCode = fixedCode,
LanguageVersion = LanguageVersion.CSharp5,
}.RunAsync();
}
[Fact]
public async Task TestUsingStaticClassAccessField2()
{
var code = """
using static SomeNS.Goo;
class Program
{
static void Main()
{
var q = x;
}
}
namespace SomeNS
{
static class Goo
{
public static int x;
}
}
""";
await VerifyCS.VerifyCodeFixAsync(code, code);
}
[Fact]
public async Task TestUsingStaticClassAccessMethod1()
{
// Test intentionally uses 'using' instead of 'using static'
var testCode = """
[|{|IDE0005:using {|CS0138:SomeNS.Goo|};|}|]
class Program
{
static void Main()
{
var q = {|CS0103:X|}();
}
}
namespace SomeNS
{
static class Goo
{
public static int X()
{
return 42;
}
}
}
""";
var fixedCode = """
[|class Program
{
static void Main()
{
var q = {|CS0103:X|}();
}
}
namespace SomeNS
{
static class Goo
{
public static int X()
{
return 42;
}
}
}|]
""";
await new VerifyCS.Test
{
TestCode = testCode,
FixedCode = fixedCode,
LanguageVersion = LanguageVersion.CSharp5,
}.RunAsync();
}
[Fact]
public async Task TestUsingStaticClassAccessMethod2()
{
var code = """
using static SomeNS.Goo;
class Program
{
static void Main()
{
var q = X();
}
}
namespace SomeNS
{
static class Goo
{
public static int X()
{
return 42;
}
}
}
""";
await VerifyCS.VerifyCodeFixAsync(code, code);
}
[Fact, WorkItem(8846, "DevDiv_Projects/Roslyn")]
public async Task TestUnusedTypeImportIsRemoved1()
{
// Test intentionally uses 'using' instead of 'using static'
await VerifyCS.VerifyCodeFixAsync(
"""
[|{|IDE0005:using {|CS0138:SomeNS.Goo|};|}|]
class Program
{
static void Main()
{
}
}
namespace SomeNS
{
static class Goo
{
}
}
""",
"""
class Program
{
static void Main()
{
}
}
namespace SomeNS
{
static class Goo
{
}
}
""");
}
[Fact]
public async Task TestUnusedTypeImportIsRemoved2()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|{|IDE0005:using static SomeNS.Goo;|}|]
class Program
{
static void Main()
{
}
}
namespace SomeNS
{
static class Goo
{
}
}
""",
"""
class Program
{
static void Main()
{
}
}
namespace SomeNS
{
static class Goo
{
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/541817")]
public async Task TestRemoveTrailingComment()
{
await VerifyCS.VerifyCodeFixAsync(
"""
{|IDE0005:[|using System.Collections.Generic;|] // comment|}
class Program
{
static void Main(string[] args)
{
}
}
""",
"""
class Program
{
static void Main(string[] args)
{
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/541914")]
public async Task TestRemovingUnbindableUsing()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|{|IDE0005:using {|CS0246:gibberish|};|}|]
public static class Program
{
}
""",
"""
public static class Program
{
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/541937")]
public async Task TestAliasInUse()
{
var code = """
using GIBBERISH = Goo.Bar;
class Program
{
static void Main(string[] args)
{
GIBBERISH x;
}
}
namespace Goo
{
public class Bar
{
}
}
""";
await VerifyCS.VerifyCodeFixAsync(code, code);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/541914")]
public async Task TestRemoveUnboundUsing()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|{|IDE0005:using {|CS0246:gibberish|};|}|]
public static class Program
{
}
""",
"""
public static class Program
{
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/542016")]
public async Task TestLeadingNewlines1()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|{|IDE0005:using System;
using System.Collections.Generic;
using System.Linq;|}|]
class Program
{
static void Main(string[] args)
{
}
}
""",
"""
class Program
{
static void Main(string[] args)
{
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/542016")]
public async Task TestRemoveLeadingNewLines2()
{
await VerifyCS.VerifyCodeFixAsync(
"""
namespace N
{
[|{|IDE0005:using System;
using System.Collections.Generic;
using System.Linq;|}|]
class Program
{
static void Main(string[] args)
{
}
}
}
""",
"""
namespace N
{
class Program
{
static void Main(string[] args)
{
}
}
}
""");
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/542134")]
public async Task TestImportedTypeUsedAsGenericTypeArgument()
{
var code = """
using GenericThingie;
public class GenericType<T>
{
}
namespace GenericThingie
{
public class Something
{
}
}
public class Program
{
void goo()
{
GenericType<Something> type;
}
}
""";
await VerifyCS.VerifyCodeFixAsync(code, code);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/542723")]
public async Task TestRemoveCorrectUsing1()
{
var source = """
using System.Collections.Generic;
namespace Goo
{
[|{|IDE0005:using Bar = Dictionary<string, string>;|}|]
}
""";
var fixedSource = """
namespace Goo
{
}
""";
await new VerifyCS.Test
{
TestCode = source,
FixedCode = fixedSource,
// Fixing the first diagnostic introduces a second diagnostic to fix.
NumberOfIncrementalIterations = 2,
NumberOfFixAllIterations = 2,
}.RunAsync();
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/542723")]
public async Task TestRemoveCorrectUsing2()
{
var code = """
using System.Collections.Generic;
namespace Goo
{
using Bar = Dictionary<string, string>;
class C
{
Bar b;
}
}
""";
await VerifyCS.VerifyCodeFixAsync(code, code);
}
[Fact]
public async Task TestSpan()
{
var code = """
namespace N
{
[|{|IDE0005:using System;|}|]
}
""";
var fixedCode = """
namespace N
{
}
""";
await VerifyCS.VerifyCodeFixAsync(code, fixedCode);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/543000")]
public async Task TestMissingWhenErrorsWouldBeGenerated()
{
var code = """
using System;
using X;
using Y;
class B
{
static void Main()
{
Bar(x => x.Goo());
}
static void Bar(Action<int> x)
{
}
static void Bar(Action<string> x)
{
}
}
namespace X
{
public static class A
{
public static void Goo(this int x)
{
}
public static void Goo(this string x)
{
}
}
}
namespace Y
{
public static class B
{
public static void Goo(this int x)
{
}
}
}
""";
await VerifyCS.VerifyCodeFixAsync(code, code);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544976")]
public async Task TestMissingWhenMeaningWouldChangeInLambda()
{
var code = """
using System;
using X;
using Y;
class B
{
static void Main()
{
Bar(x => x.Goo(), null); // Prints 1
}
static void Bar(Action<string> x, object y)
{
Console.WriteLine(1);
}
static void Bar(Action<int> x, string y)
{
Console.WriteLine(2);
}
}
namespace X
{
public static class A
{
public static void Goo(this int x)
{
}
public static void Goo(this string x)
{
}
}
}
namespace Y
{
public static class B
{
public static void Goo(this int x)
{
}
}
}
""";
await VerifyCS.VerifyCodeFixAsync(code, code);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544976")]
public async Task TestCasesWithLambdas1()
{
// NOTE: Y is used when speculatively binding "x => x.Goo()". As such, it is marked as
// used even though it isn't in the final bind, and could be removed. However, as we do
// not know if it was necessary to eliminate a speculative lambda bind, we must leave
// it.
var code = """
using System;
using X;
using Y;
class B
{
static void Main()
{
Bar(x => x.Goo(), null); // Prints 1
}
static void Bar(Action<string> x, object y)
{
}
}
namespace X
{
public static class A
{
public static void Goo(this string x)
{
}
}
}
namespace Y
{
public static class B
{
public static void Goo(this int x)
{
}
}
}
""";
await VerifyCS.VerifyCodeFixAsync(code, code);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/545646")]
public async Task TestCasesWithLambdas2()
{
var code = """
using System;
using N; // Falsely claimed as unnecessary
static class C
{
static void Ex(this string x)
{
}
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 void Main()
{
Outer(y => Inner(x => x.Ex(), y), null);
}
}
namespace N
{
static class E
{
public static void Ex(this int x)
{
}
}
}
""";
await VerifyCS.VerifyCodeFixAsync(code, code);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/545741")]
public async Task TestMissingOnAliasedVar()
{
var code = """
using var = var;
class var
{
}
class B
{
static void Main()
{
var a = 1;
}
}
""";
await VerifyCS.VerifyCodeFixAsync(code, code);
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/546115")]
public async Task TestBrokenCode()
{
var code = """
using System.Linq;
public class QueryExpressionTest
{
public static void Main()
{
var expr1 = new[] { };
var expr2 = new[] { };
var query8 = from int i in expr1
join int fixed in expr2 on i equals fixed select new { i, fixed };
var query9 = from object i in expr1
join object fixed in expr2 on i equals fixed select new { i, fixed };
}
}
""";
await new VerifyCS.Test
{
TestCode = code,
ExpectedDiagnostics =
{
// Test0.cs(7,21): error CS0826: No best type found for implicitly-typed array
DiagnosticResult.CompilerError("CS0826").WithSpan(7, 21, 7, 30),
// Test0.cs(8,21): error CS0826: No best type found for implicitly-typed array
DiagnosticResult.CompilerError("CS0826").WithSpan(8, 21, 8, 30),
// Test0.cs(10,31): error CS0742: A query body must end with a select clause or a group clause
DiagnosticResult.CompilerError("CS0742").WithSpan(10, 31, 10, 36),
// Test0.cs(10,31): error CS0743: Expected contextual keyword 'on'
DiagnosticResult.CompilerError("CS0743").WithSpan(10, 31, 10, 36),
// Test0.cs(10,31): error CS0744: Expected contextual keyword 'equals'
DiagnosticResult.CompilerError("CS0744").WithSpan(10, 31, 10, 36),
// Test0.cs(10,31): error CS1001: Identifier expected
DiagnosticResult.CompilerError("CS1001").WithSpan(10, 31, 10, 36),
// Test0.cs(10,31): error CS1002: ; expected
DiagnosticResult.CompilerError("CS1002").WithSpan(10, 31, 10, 36),
// Test0.cs(10,31): error CS1003: Syntax error, 'in' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(10, 31, 10, 36).WithArguments("in"),
// Test0.cs(10,31): error CS1525: Invalid expression term 'fixed'
DiagnosticResult.CompilerError("CS1525").WithSpan(10, 31, 10, 36).WithArguments("fixed"),
// Test0.cs(10,31): error CS1525: Invalid expression term 'fixed'
DiagnosticResult.CompilerError("CS1525").WithSpan(10, 31, 10, 36).WithArguments("fixed"),
// Test0.cs(10,31): error CS1525: Invalid expression term 'fixed'
DiagnosticResult.CompilerError("CS1525").WithSpan(10, 31, 10, 36).WithArguments("fixed"),
// Test0.cs(10,31): error CS0214: Pointers and fixed size buffers may only be used in an unsafe context
DiagnosticResult.CompilerError("CS0214").WithSpan(10, 31, 10, 49),
// Test0.cs(10,37): error CS0209: The type of a local declared in a fixed statement must be a pointer type
DiagnosticResult.CompilerError("CS0209").WithSpan(10, 37, 10, 37),
// Test0.cs(10,37): error CS0210: You must provide an initializer in a fixed or using statement declaration
DiagnosticResult.CompilerError("CS0210").WithSpan(10, 37, 10, 37),
// Test0.cs(10,37): error CS1001: Identifier expected
DiagnosticResult.CompilerError("CS1001").WithSpan(10, 37, 10, 39),
// Test0.cs(10,37): error CS1003: Syntax error, '(' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(10, 37, 10, 39).WithArguments("("),
// Test0.cs(10,37): error CS1003: Syntax error, ',' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(10, 37, 10, 39).WithArguments(","),
// Test0.cs(10,37): error CS1031: Type expected
DiagnosticResult.CompilerError("CS1031").WithSpan(10, 37, 10, 39),
// Test0.cs(10,40): error CS0118: 'expr2' is a variable but is used like a type
DiagnosticResult.CompilerError("CS0118").WithSpan(10, 40, 10, 45).WithMessage(null),
// Test0.cs(10,40): error CS1026: ) expected
DiagnosticResult.CompilerError("CS1026").WithSpan(10, 40, 10, 45),
// Test0.cs(10,40): error CS1023: Embedded statement cannot be a declaration or labeled statement
DiagnosticResult.CompilerError("CS1023").WithSpan(10, 40, 10, 49),
// Test0.cs(10,49): error CS0246: The type or namespace name 'i' could not be found (are you missing a using directive or an assembly reference?)
DiagnosticResult.CompilerError("CS0246").WithSpan(10, 49, 10, 50).WithArguments("i"),
// Test0.cs(10,49): error CS1002: ; expected
DiagnosticResult.CompilerError("CS1002").WithSpan(10, 49, 10, 50),
// Test0.cs(10,58): error CS1002: ; expected
DiagnosticResult.CompilerError("CS1002").WithSpan(10, 58, 10, 63),
// Test0.cs(10,58): error CS0214: Pointers and fixed size buffers may only be used in an unsafe context
DiagnosticResult.CompilerError("CS0214").WithSpan(10, 58, 10, 80),
// Test0.cs(10,64): error CS0246: The type or namespace name 'select' could not be found (are you missing a using directive or an assembly reference?)
DiagnosticResult.CompilerError("CS0246").WithSpan(10, 64, 10, 70).WithArguments("select"),
// Test0.cs(10,64): error CS1003: Syntax error, '(' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(10, 64, 10, 70).WithArguments("("),
// Test0.cs(10,71): error CS0209: The type of a local declared in a fixed statement must be a pointer type
DiagnosticResult.CompilerError("CS0209").WithSpan(10, 71, 10, 71),
// Test0.cs(10,71): error CS0210: You must provide an initializer in a fixed or using statement declaration
DiagnosticResult.CompilerError("CS0210").WithSpan(10, 71, 10, 71),
// Test0.cs(10,71): error CS1001: Identifier expected
DiagnosticResult.CompilerError("CS1001").WithSpan(10, 71, 10, 74),
// Test0.cs(10,71): error CS1026: ) expected
DiagnosticResult.CompilerError("CS1026").WithSpan(10, 71, 10, 74),
// Test0.cs(10,77): error CS0103: The name 'i' does not exist in the current context
DiagnosticResult.CompilerError("CS0103").WithSpan(10, 77, 10, 78).WithArguments("i"),
// Test0.cs(10,80): error CS1002: ; expected
DiagnosticResult.CompilerError("CS1002").WithSpan(10, 80, 10, 85),
// Test0.cs(10,80): error CS1513: } expected
DiagnosticResult.CompilerError("CS1513").WithSpan(10, 80, 10, 85),
// Test0.cs(10,80): error CS0214: Pointers and fixed size buffers may only be used in an unsafe context
DiagnosticResult.CompilerError("CS0214").WithSpan(10, 80, 10, 86),
// Test0.cs(10,86): error CS0209: The type of a local declared in a fixed statement must be a pointer type
DiagnosticResult.CompilerError("CS0209").WithSpan(10, 86, 10, 86),
// Test0.cs(10,86): error CS0210: You must provide an initializer in a fixed or using statement declaration
DiagnosticResult.CompilerError("CS0210").WithSpan(10, 86, 10, 86),
// Test0.cs(10,86): error CS1001: Identifier expected
DiagnosticResult.CompilerError("CS1001").WithSpan(10, 86, 10, 87),
// Test0.cs(10,86): error CS1002: ; expected
DiagnosticResult.CompilerError("CS1002").WithSpan(10, 86, 10, 87),
// Test0.cs(10,86): error CS1003: Syntax error, '(' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(10, 86, 10, 87).WithArguments("("),
// Test0.cs(10,86): error CS1026: ) expected
DiagnosticResult.CompilerError("CS1026").WithSpan(10, 86, 10, 87),
// Test0.cs(10,86): error CS1031: Type expected
DiagnosticResult.CompilerError("CS1031").WithSpan(10, 86, 10, 87),
// Test0.cs(10,86): error CS1525: Invalid expression term '}'
DiagnosticResult.CompilerError("CS1525").WithSpan(10, 86, 10, 87).WithArguments("}"),
// Test0.cs(10,87): error CS1597: Semicolon after method or accessor block is not valid
DiagnosticResult.CompilerError("CS1597").WithSpan(10, 87, 10, 88),
// Test0.cs(12,5): error CS0825: The contextual keyword 'var' may only appear within a local variable declaration or in script code
DiagnosticResult.CompilerError("CS0825").WithSpan(12, 5, 12, 8),
// Test0.cs(12,35): error CS0103: The name 'expr1' does not exist in the current context
DiagnosticResult.CompilerError("CS0103").WithSpan(12, 35, 12, 40).WithArguments("expr1"),
// Test0.cs(13,30): error CS0742: A query body must end with a select clause or a group clause
DiagnosticResult.CompilerError("CS0742").WithSpan(13, 30, 13, 35),
// Test0.cs(13,30): error CS0743: Expected contextual keyword 'on'
DiagnosticResult.CompilerError("CS0743").WithSpan(13, 30, 13, 35),
// Test0.cs(13,30): error CS0744: Expected contextual keyword 'equals'
DiagnosticResult.CompilerError("CS0744").WithSpan(13, 30, 13, 35),
// Test0.cs(13,30): error CS1001: Identifier expected
DiagnosticResult.CompilerError("CS1001").WithSpan(13, 30, 13, 35),
// Test0.cs(13,30): error CS1002: ; expected
DiagnosticResult.CompilerError("CS1002").WithSpan(13, 30, 13, 35),
// Test0.cs(13,30): error CS1003: Syntax error, 'in' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(13, 30, 13, 35).WithArguments("in"),
// Test0.cs(13,30): error CS1525: Invalid expression term 'fixed'
DiagnosticResult.CompilerError("CS1525").WithSpan(13, 30, 13, 35).WithArguments("fixed"),
// Test0.cs(13,30): error CS1525: Invalid expression term 'fixed'
DiagnosticResult.CompilerError("CS1525").WithSpan(13, 30, 13, 35).WithArguments("fixed"),
// Test0.cs(13,30): error CS1525: Invalid expression term 'fixed'
DiagnosticResult.CompilerError("CS1525").WithSpan(13, 30, 13, 35).WithArguments("fixed"),
// Test0.cs(13,36): error CS1642: Fixed size buffer fields may only be members of structs
DiagnosticResult.CompilerError("CS1642").WithSpan(13, 36, 13, 36),
// Test0.cs(13,36): error CS1663: Fixed size buffer type must be one of the following: bool, byte, short, int, long, char, sbyte, ushort, uint, ulong, float or double
DiagnosticResult.CompilerError("CS1663").WithSpan(13, 36, 13, 36),
// Test0.cs(13,36): error CS1001: Identifier expected
DiagnosticResult.CompilerError("CS1001").WithSpan(13, 36, 13, 38),
// Test0.cs(13,36): error CS1003: Syntax error, ',' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(13, 36, 13, 38).WithArguments(","),
// Test0.cs(13,36): error CS1003: Syntax error, '[' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(13, 36, 13, 38).WithArguments("["),
// Test0.cs(13,36): error CS1031: Type expected
DiagnosticResult.CompilerError("CS1031").WithSpan(13, 36, 13, 38),
// Test0.cs(13,36): error CS0214: Pointers and fixed size buffers may only be used in an unsafe context
DiagnosticResult.CompilerError("CS0214").WithSpan(13, 36, 13, 57),
// Test0.cs(13,36): error CS7092: A fixed buffer may only have one dimension.
DiagnosticResult.CompilerError("CS7092").WithSpan(13, 36, 13, 57),
// Test0.cs(13,39): error CS0103: The name 'expr2' does not exist in the current context
DiagnosticResult.CompilerError("CS0103").WithSpan(13, 39, 13, 44).WithArguments("expr2"),
// Test0.cs(13,45): error CS1003: Syntax error, ',' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(13, 45, 13, 47).WithArguments(","),
// Test0.cs(13,48): error CS1003: Syntax error, ',' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(13, 48, 13, 49).WithArguments(","),
// Test0.cs(13,50): error CS1003: Syntax error, ',' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(13, 50, 13, 56).WithArguments(","),
// Test0.cs(13,57): error CS0443: Syntax error; value expected
DiagnosticResult.CompilerError("CS0443").WithSpan(13, 57, 13, 57),
// Test0.cs(13,57): error CS1002: ; expected
DiagnosticResult.CompilerError("CS1002").WithSpan(13, 57, 13, 62),
// Test0.cs(13,57): error CS1003: Syntax error, ',' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(13, 57, 13, 62).WithArguments(","),
// Test0.cs(13,57): error CS1003: Syntax error, ']' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(13, 57, 13, 62).WithArguments("]"),
// Test0.cs(13,63): error CS0246: The type or namespace name 'select' could not be found (are you missing a using directive or an assembly reference?)
DiagnosticResult.CompilerError("CS0246").WithSpan(13, 63, 13, 69).WithArguments("select"),
// Test0.cs(13,63): error CS1663: Fixed size buffer type must be one of the following: bool, byte, short, int, long, char, sbyte, ushort, uint, ulong, float or double
DiagnosticResult.CompilerError("CS1663").WithSpan(13, 63, 13, 69),
// Test0.cs(13,70): error CS0102: The type 'QueryExpressionTest' already contains a definition for ''
DiagnosticResult.CompilerError("CS0102").WithSpan(13, 70, 13, 70).WithArguments("QueryExpressionTest", ""),
// Test0.cs(13,70): error CS1642: Fixed size buffer fields may only be members of structs
DiagnosticResult.CompilerError("CS1642").WithSpan(13, 70, 13, 70),
// Test0.cs(13,70): error CS0836: Cannot use anonymous type in a constant expression
DiagnosticResult.CompilerError("CS0836").WithSpan(13, 70, 13, 73),
// Test0.cs(13,70): error CS1001: Identifier expected
DiagnosticResult.CompilerError("CS1001").WithSpan(13, 70, 13, 73),
// Test0.cs(13,70): error CS1003: Syntax error, '[' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(13, 70, 13, 73).WithArguments("["),
// Test0.cs(13,70): error CS0214: Pointers and fixed size buffers may only be used in an unsafe context
DiagnosticResult.CompilerError("CS0214").WithSpan(13, 70, 13, 79),
// Test0.cs(13,70): error CS7092: A fixed buffer may only have one dimension.
DiagnosticResult.CompilerError("CS7092").WithSpan(13, 70, 13, 79),
// Test0.cs(13,76): error CS0103: The name 'i' does not exist in the current context
DiagnosticResult.CompilerError("CS0103").WithSpan(13, 76, 13, 77).WithArguments("i"),
// Test0.cs(13,79): error CS0443: Syntax error; value expected
DiagnosticResult.CompilerError("CS0443").WithSpan(13, 79, 13, 79),
// Test0.cs(13,79): error CS1002: ; expected
DiagnosticResult.CompilerError("CS1002").WithSpan(13, 79, 13, 84),
// Test0.cs(13,79): error CS1003: Syntax error, ',' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(13, 79, 13, 84).WithArguments(","),
// Test0.cs(13,79): error CS1003: Syntax error, ']' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(13, 79, 13, 84).WithArguments("]"),
// Test0.cs(13,79): error CS1513: } expected
DiagnosticResult.CompilerError("CS1513").WithSpan(13, 79, 13, 84),
// Test0.cs(13,85): error CS0102: The type 'QueryExpressionTest' already contains a definition for ''
DiagnosticResult.CompilerError("CS0102").WithSpan(13, 85, 13, 85).WithArguments("QueryExpressionTest", ""),
// Test0.cs(13,85): error CS0214: Pointers and fixed size buffers may only be used in an unsafe context
DiagnosticResult.CompilerError("CS0214").WithSpan(13, 85, 13, 85),
// Test0.cs(13,85): error CS1642: Fixed size buffer fields may only be members of structs
DiagnosticResult.CompilerError("CS1642").WithSpan(13, 85, 13, 85),
// Test0.cs(13,85): error CS1663: Fixed size buffer type must be one of the following: bool, byte, short, int, long, char, sbyte, ushort, uint, ulong, float or double
DiagnosticResult.CompilerError("CS1663").WithSpan(13, 85, 13, 85),
// Test0.cs(13,85): error CS0443: Syntax error; value expected
DiagnosticResult.CompilerError("CS0443").WithSpan(13, 85, 13, 86),
// Test0.cs(13,85): error CS1001: Identifier expected
DiagnosticResult.CompilerError("CS1001").WithSpan(13, 85, 13, 86),
// Test0.cs(13,85): error CS1002: ; expected
DiagnosticResult.CompilerError("CS1002").WithSpan(13, 85, 13, 86),
// Test0.cs(13,85): error CS1003: Syntax error, '[' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(13, 85, 13, 86).WithArguments("["),
// Test0.cs(13,85): error CS1003: Syntax error, ']' expected
DiagnosticResult.CompilerError("CS1003").WithSpan(13, 85, 13, 86).WithArguments("]"),
// Test0.cs(13,85): error CS1031: Type expected
DiagnosticResult.CompilerError("CS1031").WithSpan(13, 85, 13, 86),
// Test0.cs(14,3): error CS1022: Type or namespace definition, or end-of-file expected
DiagnosticResult.CompilerError("CS1022").WithSpan(14, 3, 14, 4),
// Test0.cs(15,1): error CS1022: Type or namespace definition, or end-of-file expected
DiagnosticResult.CompilerError("CS1022").WithSpan(15, 1, 15, 2),
},
FixedCode = code,
}.RunAsync();
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/530980")]
public async Task TestReferenceInCref()
{
// Parsing doc comments as simple trivia; we don't know System is unnecessary, but CS8019 is disabled so
// no diagnostics are reported.
var code = """
using System;
/// <summary><see cref="String" /></summary>
class C
{
}
""";
await new VerifyCS.Test
{
TestState =
{
Sources = { code },
DocumentationMode = DocumentationMode.None,
},
}.RunAsync();
// fully parsing doc comments; System is necessary
await new VerifyCS.Test
{
TestState =
{
Sources = { code },
DocumentationMode = DocumentationMode.Parse,
},
}.RunAsync();
// fully parsing and diagnosing doc comments; System is necessary
await new VerifyCS.Test
{
TestState =
{
Sources = { code },
DocumentationMode = DocumentationMode.Diagnose,
},
}.RunAsync();
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/751283")]
public async Task TestUnusedUsingOverLinq()
{
await VerifyCS.VerifyCodeFixAsync(
"""
[|using System;
{|IDE0005:using System.Linq;
using System.Threading.Tasks;|}|]
class Program
{
static void Main(string[] args)
{
Console.WriteLine();
}
}
""",
"""
using System;
class Program
{
static void Main(string[] args)
{
Console.WriteLine();
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/1323")]
public async Task TestUsingsInPPRegionWithoutOtherMembers()
{
await VerifyCS.VerifyCodeFixAsync(
"""
#if true
[|{|IDE0005:using System;|}|]
#endif
""",
"""
#if true
#endif
""");
}
[Theory]
[InlineData(0)]
[InlineData(1)]
[InlineData(2)]
[InlineData(3)]
[InlineData(4)]
[InlineData(5)]
[WorkItem("https://github.com/dotnet/roslyn/issues/20377")]
public async Task TestWarningLevel(int warningLevel)
{
var code = """
[|{|IDE0005:using System;
using System.Collections.Generic;
using System.Linq;|}|]
class Program
{
static void Main(string[] args)
{
}
}
""";
var fixedCode = warningLevel switch
{
0 => code,
_ => """
class Program
{
static void Main(string[] args)
{
}
}
""",
};
var markupMode = warningLevel switch
{
// Hidden diagnostics are not reported for warning level 0
0 => MarkupMode.Ignore,
// But are reported for all other warning levels
_ => MarkupMode.Allow,
};
await new VerifyCS.Test
{
TestState =
{
Sources = { code },
MarkupHandling = markupMode,
},
FixedCode = fixedCode,
SolutionTransforms =
{
(solution, projectId) =>
{
var compilationOptions = (CSharpCompilationOptions)solution.GetRequiredProject(projectId).CompilationOptions!;
return solution.WithProjectCompilationOptions(projectId, compilationOptions.WithWarningLevel(warningLevel));
},
},
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/58972")]
public async Task TestWhitespaceBeforeUnusedUsings_FileScopedNamespace()
{
await new VerifyCS.Test
{
TestCode =
"""
namespace N;
[|{|IDE0005:using System;|}
using System.Collections.Generic;|]
class Program
{
static void Main(string[] args)
{
var argList = new List<string>(args);
}
}
""",
FixedCode =
"""
namespace N;
using System.Collections.Generic;
class Program
{
static void Main(string[] args)
{
var argList = new List<string>(args);
}
}
""",
LanguageVersion = LanguageVersion.CSharp10,
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/45866")]
public async Task TestUsingGroups_DeleteLeadingBlankLinesIfFirstGroupWasDeleted_SingleUsing()
{
await new VerifyCS.Test
{
TestCode =
"""
[|{|IDE0005:using System;|}
using System.Collections.Generic;|]
class Program
{
static void Main(string[] args)
{
var argList = new List<string>(args);
}
}
""",
FixedCode =
"""
using System.Collections.Generic;
class Program
{
static void Main(string[] args)
{
var argList = new List<string>(args);
}
}
"""
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/45866")]
public async Task TestUsingGroups_DeleteLeadingBlankLinesIfFirstGroupWasDeleted_MultipleUsings()
{
await new VerifyCS.Test
{
TestCode =
"""
[|{|IDE0005:using System;
using System.Threading.Tasks;|}
using System.Collections.Generic;|]
class Program
{
static void Main(string[] args)
{
var argList = new List<string>(args);
}
}
""",
FixedCode =
"""
using System.Collections.Generic;
class Program
{
static void Main(string[] args)
{
var argList = new List<string>(args);
}
}
"""
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/45866")]
public async Task TestUsingGroups_NotAllFirstGroupIsDeleted()
{
await new VerifyCS.Test
{
TestCode =
"""
[|{|IDE0005:using System;|}
using System.Threading.Tasks;
using System.Collections.Generic;|]
class Program
{
static void Main(string[] args)
{
var argList = new List<string>(args);
Task task = null;
}
}
""",
FixedCode =
"""
using System.Threading.Tasks;
using System.Collections.Generic;
class Program
{
static void Main(string[] args)
{
var argList = new List<string>(args);
Task task = null;
}
}
"""
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/45866")]
public async Task TestUsingGroups_AllLastGroupIsDeleted()
{
await new VerifyCS.Test
{
TestCode =
"""
[|using System.Collections.Generic;
{|IDE0005:using System;
using System.Threading.Tasks;|}|]
class Program
{
static void Main(string[] args)
{
var argList = new List<string>(args);
}
}
""",
FixedCode =
"""
using System.Collections.Generic;
class Program
{
static void Main(string[] args)
{
var argList = new List<string>(args);
}
}
"""
}.RunAsync();
}
}
}
|