Merge pull request #42253 from CyrusNajmabadi/addTest12

Add test validating behavior.

src/EditorFeatures/Test/MetadataAsSource/MetadataAsSourceTests.CSharp.cs

@@ -2,14 +2,17 @@
 // 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.MetadataAsSource;
 using Microsoft.CodeAnalysis.Test.Utilities;
+using Roslyn.Test.Utilities;
 using Xunit;
 
 namespace Microsoft.CodeAnalysis.Editor.UnitTests.MetadataAsSource
 {
     public partial class MetadataAsSourceTests
     {
+        [UseExportProvider]
         public class CSharp
         {
             [Fact, Trait(Traits.Feature, Traits.Features.MetadataAsSource)]
@@ -27,6 +30,41 @@ public void ExtractXMLFromDocComment()
 
                 Assert.Equal(expectedXMLFragment, extractedXMLFragment);
             }
+
+            [Fact, WorkItem(26605, "https://github.com/dotnet/roslyn/issues/26605")]
+            public async Task TestValueTuple()
+            {
+                using var context = TestContext.Create(LanguageNames.CSharp);
+                await context.GenerateAndVerifySourceAsync("System.ValueTuple",
+@$"#region {FeaturesResources.Assembly} System.ValueTuple, Version=4.0.1.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51
+// System.ValueTuple.dll
+#endregion
+
+using System;
+using System;
+using System.Collections;
+
+namespace System
+{{
+    public struct [|ValueTuple|] : IEquatable<ValueTuple>, IStructuralEquatable, IStructuralComparable, IComparable, IComparable<ValueTuple>, ITupleInternal
+    {{
+        public static ValueTuple Create();
+        public static ValueTuple<T1> Create<T1>(T1 item1);
+        public static (T1, T2) Create<T1, T2>(T1 item1, T2 item2);
+        public static (T1, T2, T3) Create<T1, T2, T3>(T1 item1, T2 item2, T3 item3);
+        public static (T1, T2, T3, T4) Create<T1, T2, T3, T4>(T1 item1, T2 item2, T3 item3, T4 item4);
+        public static (T1, T2, T3, T4, T5) Create<T1, T2, T3, T4, T5>(T1 item1, T2 item2, T3 item3, T4 item4, T5 item5);
+        public static (T1, T2, T3, T4, T5, T6) Create<T1, T2, T3, T4, T5, T6>(T1 item1, T2 item2, T3 item3, T4 item4, T5 item5, T6 item6);
+        public static (T1, T2, T3, T4, T5, T6, T7) Create<T1, T2, T3, T4, T5, T6, T7>(T1 item1, T2 item2, T3 item3, T4 item4, T5 item5, T6 item6, T7 item7);
+        public static (T1, T2, T3, T4, T5, T6, T7, T8) Create<T1, T2, T3, T4, T5, T6, T7, T8>(T1 item1, T2 item2, T3 item3, T4 item4, T5 item5, T6 item6, T7 item7, T8 item8);
+        public int CompareTo(ValueTuple other);
+        public override bool Equals(object obj);
+        public bool Equals(ValueTuple other);
+        public override int GetHashCode();
+        public override string ToString();
+    }}
+}}");
+            }
         }
     }
 }

src/EditorFeatures/Test/MetadataAsSource/MetadataAsSourceTests.VisualBasic.cs

@@ -85,6 +85,41 @@ public void ExtractXMLFromDocComment()
 
                 Assert.Equal(expectedXMLFragment, extractedXMLFragment);
             }
+
+            [Fact, WorkItem(26605, "https://github.com/dotnet/roslyn/issues/26605")]
+            public async Task TestValueTuple()
+            {
+                using var context = TestContext.Create(LanguageNames.VisualBasic);
+                await context.GenerateAndVerifySourceAsync("System.ValueTuple",
+@$"#Region ""{FeaturesResources.Assembly} System.ValueTuple, Version=4.0.1.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51""
+' System.ValueTuple.dll
+#End Region
+
+Imports System
+Imports System
+Imports System.Collections
+
+Namespace System
+    Public Structure [|ValueTuple|]
+        Implements IEquatable(Of ValueTuple), IStructuralEquatable, IStructuralComparable, IComparable, IComparable(Of ValueTuple), ITupleInternal
+
+        Public Shared Function Create() As ValueTuple
+        Public Shared Function Create(Of T1)(item1 As T1) As ValueTuple(Of T1)
+        Public Shared Function Create(Of T1, T2)(item1 As T1, item2 As T2) As (T1, T2)
+        Public Shared Function Create(Of T1, T2, T3)(item1 As T1, item2 As T2, item3 As T3) As (T1, T2, T3)
+        Public Shared Function Create(Of T1, T2, T3, T4)(item1 As T1, item2 As T2, item3 As T3, item4 As T4) As (T1, T2, T3, T4)
+        Public Shared Function Create(Of T1, T2, T3, T4, T5)(item1 As T1, item2 As T2, item3 As T3, item4 As T4, item5 As T5) As (T1, T2, T3, T4, T5)
+        Public Shared Function Create(Of T1, T2, T3, T4, T5, T6)(item1 As T1, item2 As T2, item3 As T3, item4 As T4, item5 As T5, item6 As T6) As (T1, T2, T3, T4, T5, T6)
+        Public Shared Function Create(Of T1, T2, T3, T4, T5, T6, T7)(item1 As T1, item2 As T2, item3 As T3, item4 As T4, item5 As T5, item6 As T6, item7 As T7) As (T1, T2, T3, T4, T5, T6, T7)
+        Public Shared Function Create(Of T1, T2, T3, T4, T5, T6, T7, T8)(item1 As T1, item2 As T2, item3 As T3, item4 As T4, item5 As T5, item6 As T6, item7 As T7, item8 As T8) As (T1, T2, T3, T4, T5, T6, T7, T8)
+        Public Overrides Function Equals(obj As Object) As Boolean
+        Public Function Equals(other As ValueTuple) As Boolean
+        Public Function CompareTo(other As ValueTuple) As Integer
+        Public Overrides Function GetHashCode() As Integer
+        Public Overrides Function ToString() As String
+    End Structure
+End Namespace");
+            }
         }
     }
 }