' 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.
 
Imports Microsoft.CodeAnalysis.ExpressionEvaluator
Imports Microsoft.VisualStudio.Debugger.Clr
Imports Microsoft.VisualStudio.Debugger.Evaluation
Imports System.Reflection
Imports Roslyn.Test.Utilities
Imports Xunit
 
Namespace Microsoft.CodeAnalysis.VisualBasic.ExpressionEvaluator.UnitTests
 
    Public Class ResultsViewTests
        Inherits VisualBasicResultProviderTestBase
 
        <Fact>
        Public Sub IEnumerableExplicitImplementation()
            Const source =
"Imports System.Collections
Class C
    Implements IEnumerable
    Private e As IEnumerable
    Sub New(e As IEnumerable)
        Me.e = e
    End Sub
    Private Function F() As IEnumerator Implements IEnumerable.GetEnumerator
        Return e.GetEnumerator()
    End Function
End Class"
            Dim assembly = GetAssembly(source)
            Dim assemblies = ReflectionUtilities.GetMscorlibAndSystemCore(assembly)
            Using ReflectionUtilities.LoadAssemblies(assemblies)
                Dim runtime = New DkmClrRuntimeInstance(assemblies)
                Dim type = assembly.GetType("C")
                Dim value = CreateDkmClrValue(
                    value:=type.Instantiate(New Integer() {1, 2}),
                    type:=runtime.GetType(CType(type, TypeImpl)))
                Dim result = FormatResult("o", value)
                Verify(result,
                       EvalResult("o", "{C}", "C", "o", DkmEvaluationResultFlags.Expandable))
                Dim children = GetChildren(result)
                Verify(children,
                    EvalResult(
                        "e",
                        "{Length=2}",
                        "System.Collections.IEnumerable {Integer()}",
                        "o.e",
                        DkmEvaluationResultFlags.Expandable Or DkmEvaluationResultFlags.CanFavorite),
                    EvalResult(
                        "Results View",
                        "Expanding the Results View will enumerate the IEnumerable",
                        "",
                        "o, results",
                        DkmEvaluationResultFlags.Expandable Or DkmEvaluationResultFlags.ReadOnly Or DkmEvaluationResultFlags.ExpansionHasSideEffects,
                        DkmEvaluationResultCategory.Method))
                children = GetChildren(children(1))
                Verify(children,
                    EvalResult("(0)", "1", "Object {Integer}", "New System.Linq.SystemCore_EnumerableDebugView(o).Items(0)"),
                    EvalResult("(1)", "2", "Object {Integer}", "New System.Linq.SystemCore_EnumerableDebugView(o).Items(1)"))
            End Using
        End Sub
 
        <Fact>
        Public Sub IEnumerableOfTExplicitImplementation()
            Const source =
"Imports System.Collections
Imports System.Collections.Generic
Class C(Of T)
    Implements IEnumerable(Of T)
    Private e As IEnumerable(Of T)
    Sub New(e As IEnumerable(Of T))
        Me.e = e
    End Sub
    Private Function F() As IEnumerator(Of T) Implements IEnumerable(Of T).GetEnumerator
        Return e.GetEnumerator()
    End Function
    Private Function G() As IEnumerator Implements IEnumerable.GetEnumerator
        Return e.GetEnumerator()
    End Function
End Class"
            Dim assembly = GetAssembly(source)
            Dim assemblies = ReflectionUtilities.GetMscorlibAndSystemCore(assembly)
            Using ReflectionUtilities.LoadAssemblies(assemblies)
                Dim runtime = New DkmClrRuntimeInstance(assemblies)
                Dim type = assembly.GetType("C`1").MakeGenericType(GetType(Integer))
                Dim value = CreateDkmClrValue(
                    value:=type.Instantiate(New Integer() {1, 2}),
                    type:=runtime.GetType(CType(type, TypeImpl)))
                Dim result = FormatResult("o", value)
                Verify(result,
                       EvalResult("o", "{C(Of Integer)}", "C(Of Integer)", "o", DkmEvaluationResultFlags.Expandable))
                Dim children = GetChildren(result)
                Verify(children,
                    EvalResult(
                        "e",
                        "{Length=2}",
                        "System.Collections.Generic.IEnumerable(Of Integer) {Integer()}",
                        "o.e",
                        DkmEvaluationResultFlags.Expandable Or DkmEvaluationResultFlags.CanFavorite),
                    EvalResult(
                        "Results View",
                        "Expanding the Results View will enumerate the IEnumerable",
                        "",
                        "o, results",
                        DkmEvaluationResultFlags.Expandable Or DkmEvaluationResultFlags.ReadOnly Or DkmEvaluationResultFlags.ExpansionHasSideEffects,
                        DkmEvaluationResultCategory.Method))
                children = GetChildren(children(1))
                Verify(children,
                    EvalResult("(0)", "1", "Integer", "New System.Linq.SystemCore_EnumerableDebugView(Of Integer)(o).Items(0)"),
                    EvalResult("(1)", "2", "Integer", "New System.Linq.SystemCore_EnumerableDebugView(Of Integer)(o).Items(1)"))
            End Using
        End Sub
 
        <Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1043746")>
        Public Sub GetProxyPropertyValueError()
            Const source =
"Imports System.Collections
Class C
    Implements IEnumerable
    Private Iterator Function F() As IEnumerator Implements IEnumerable.GetEnumerator
        Yield 1
    End Function
End Class"
            Dim runtime As DkmClrRuntimeInstance = Nothing
            Dim getMemberValue As GetMemberValueDelegate = Function(v, m) If(m = "Items", CreateErrorValue(runtime.GetType(GetType(Object)).MakeArrayType(), String.Format("Unable to evaluate '{0}'", m)), Nothing)
            runtime = New DkmClrRuntimeInstance(ReflectionUtilities.GetMscorlibAndSystemCore(GetAssembly(source)), getMemberValue:=getMemberValue)
            Using runtime.Load()
                Dim type = runtime.GetType("C")
                Dim value = type.Instantiate()
                Dim result = FormatResult("o", value)
                Verify(result,
                       EvalResult("o", "{C}", "C", "o", DkmEvaluationResultFlags.Expandable))
                Dim children = GetChildren(result)
                Verify(children,
                    EvalResult(
                        "Results View",
                        "Expanding the Results View will enumerate the IEnumerable",
                        "",
                        "o, results",
                        DkmEvaluationResultFlags.Expandable Or DkmEvaluationResultFlags.ReadOnly Or DkmEvaluationResultFlags.ExpansionHasSideEffects,
                        DkmEvaluationResultCategory.Method))
                children = GetChildren(children(0))
                Verify(children,
                    EvalFailedResult("Error", "Unable to evaluate 'Items'", flags:=DkmEvaluationResultFlags.None))
            End Using
        End Sub
 
    End Class
 
End Namespace