Fix integration test

src/VisualStudio/IntegrationTest/IntegrationTests/CSharp/CSharpRenameFileToMatchTypeRefactoring.cs

@@ -67,9 +67,21 @@ public void RenameFileToMatchType_UndoStackPreserved()
             VisualStudio.Editor.Verify.CurrentLineText("public class MismatchedClassName { }");
             VisualStudio.SolutionExplorer.Verify.FileContents(project, "MismatchedClassName.cs", @"public class MismatchedClassName { }");
 
-            // Undo just undoes text changes. The file rename is not undone, and the changes are not saved after the undo
+            // The first undo is for the file rename.
+            VisualStudio.Editor.Undo();
+            VisualStudio.Editor.Verify.CurrentLineText("public class MismatchedClassName { }");
+            VisualStudio.SolutionExplorer.Verify.FileContents(project, "Class1.cs", @"public class MismatchedClassName { }");
+
+            // The second undo is for the text changes.
             VisualStudio.Editor.Undo();
             VisualStudio.Editor.Verify.CurrentLineText("class MismatchedClassName { }");
+
+            // Redo the text changes
+            VisualStudio.Editor.Redo();
+            VisualStudio.Editor.Verify.CurrentLineText("public class MismatchedClassName { }");
+
+            // Redo the file rename
+            VisualStudio.Editor.Redo();
             VisualStudio.SolutionExplorer.Verify.FileContents(project, "MismatchedClassName.cs", @"public class MismatchedClassName { }");
         }
     }

src/VisualStudio/IntegrationTest/TestUtilities/InProcess/Editor_InProc.cs

@@ -697,6 +697,9 @@ public void Paste()
         public void Undo()
             => ExecuteCommand(WellKnownCommandNames.Edit_Undo);
 
+        public void Redo()
+            => GetDTE().ExecuteCommand(WellKnownCommandNames.Edit_Redo);
+
         protected override ITextBuffer GetBufferContainingCaret(IWpfTextView view)
         {
             return view.GetBufferContainingCaret();

src/VisualStudio/IntegrationTest/TestUtilities/OutOfProcess/Editor_OutOfProc.cs

@@ -218,6 +218,9 @@ public void Paste(string text)
         public void Undo()
             => _editorInProc.Undo();
 
+        public void Redo()
+            => _editorInProc.Redo();
+
         public void NavigateToSendKeys(params object[] keys)
             => _editorInProc.SendKeysToNavigateTo(keys);
 

src/VisualStudio/IntegrationTest/TestUtilities/WellKnownCommandNames.cs

@@ -15,6 +15,7 @@ public static class WellKnownCommandNames
         public const string Edit_QuickInfo = "Edit.QuickInfo";
         public const string Edit_ToggleCompletionMode = "Edit.ToggleCompletionMode";
         public const string Edit_Undo = "Edit.Undo";
+        public const string Edit_Redo = "Edit.Redo";
         public const string Edit_SelectionCancel = "Edit.SelectionCancel";
         public const string Edit_LineStart = "Edit.LineStart";
         public const string Edit_LineEnd = "Edit.LineEnd";