Add tests for cohosting linked editing range that use real components

src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/CohostLinkedEditingRangeTest.cs → src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/CohostLinkedEditingRangeEndpointTest.cs

@@ -13,10 +13,30 @@
 using Xunit;
 using Xunit.Abstractions;
 
-namespace Microsoft.VisualStudio.LanguageServices.Razor.Test.Cohost;
+namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
 
-public class CohostLinkedEditingRangeTest(ITestOutputHelper testOutputHelper) : CohostTestBase(testOutputHelper)
+public class CohostLinkedEditingRangeEndpointTest(ITestOutputHelper testOutputHelper) : CohostTestBase(testOutputHelper)
 {
+    [Theory]
+    [InlineData("$$PageTitle", "PageTitle")]
+    [InlineData("Page$$Title", "PageTitle")]
+    [InlineData("PageTitle$$", "PageTitle")]
+    [InlineData("PageTitle", "$$PageTitle")]
+    [InlineData("PageTitle", "Page$$Title")]
+    [InlineData("PageTitle", "PageTitle$$")]
+    public async Task Component_StartAndEndTag(string startTag, string endTag)
+    {
+        var input = $"""
+            This is a Razor document.
+
+            <[|{startTag}|]>This is the title</[|{endTag}|]>
+
+            The end.
+            """;
+
+        await VerifyLinkedEditingRangeAsync(input);
+    }
+
     [Theory]
     [InlineData("$$div")]
     [InlineData("di$$v")]
@@ -141,7 +161,7 @@ The end.
     private async Task VerifyLinkedEditingRangeAsync(string input)
     {
         TestFileMarkupParser.GetPositionAndSpans(input, out input, out int cursorPosition, out ImmutableArray<TextSpan> spans);
-        var document = CreateRazorDocument(input);
+        var document = CreateProjectAndRazorDocument(input);
         var sourceText = await document.GetTextAsync(DisposalToken);
         sourceText.GetLineAndOffset(cursorPosition, out var lineIndex, out var characterIndex);
 

src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/CohostTestBase.cs

@@ -2,7 +2,9 @@
 // Licensed under the MIT license. See License.txt in the project root for license information.
 
 using System.IO;
+using System.Linq;
 using System.Threading.Tasks;
+using Basic.Reference.Assemblies;
 using Microsoft.AspNetCore.Razor;
 using Microsoft.AspNetCore.Razor.Test.Common;
 using Microsoft.AspNetCore.Razor.Test.Common.Workspaces;
@@ -12,7 +14,7 @@
 using Microsoft.CodeAnalysis.Text;
 using Xunit.Abstractions;
 
-namespace Microsoft.VisualStudio.LanguageServices.Razor.Test.Cohost;
+namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
 
 public abstract class CohostTestBase(ITestOutputHelper testOutputHelper) : WorkspaceTestBase(testOutputHelper)
 {
@@ -28,27 +30,42 @@ protected override async Task InitializeAsync()
         _remoteServiceProvider = AddDisposable(new TestRemoteServiceProvider(exportProvider));
     }
 
-    protected TextDocument CreateRazorDocument(string contents)
+    protected TextDocument CreateProjectAndRazorDocument(string contents)
     {
         var projectFilePath = TestProjectData.SomeProject.FilePath;
         var documentFilePath = TestProjectData.SomeProjectComponentFile1.FilePath;
         var projectName = Path.GetFileNameWithoutExtension(projectFilePath);
         var projectId = ProjectId.CreateNewId(debugName: projectName);
         var documentId = DocumentId.CreateNewId(projectId, debugName: documentFilePath);
 
-        var solution = Workspace.CurrentSolution.AddProject(ProjectInfo.Create(
-            projectId,
-            VersionStamp.Create(),
-            name: projectName,
-            assemblyName: projectName,
-            LanguageNames.CSharp,
-            documentFilePath));
-
-        solution = solution.AddAdditionalDocument(
-            documentId,
-            documentFilePath,
-            SourceText.From(contents),
-            filePath: documentFilePath);
+        var projectInfo = ProjectInfo
+            .Create(
+                projectId,
+                VersionStamp.Create(),
+                name: projectName,
+                assemblyName: projectName,
+                LanguageNames.CSharp,
+                documentFilePath)
+            .WithMetadataReferences(AspNet80.ReferenceInfos.All.Select(r => r.Reference));
+
+        var solution = Workspace.CurrentSolution.AddProject(projectInfo);
+
+        solution = solution
+            .AddAdditionalDocument(
+                documentId,
+                documentFilePath,
+                SourceText.From(contents),
+                filePath: documentFilePath)
+            .AddAdditionalDocument(
+                DocumentId.CreateNewId(projectId),
+                name: "_Imports.razor",
+                text: SourceText.From("""
+                    @using Microsoft.AspNetCore.Components
+                    @using Microsoft.AspNetCore.Components.Authorization
+                    @using Microsoft.AspNetCore.Components.Routing
+                    @using Microsoft.AspNetCore.Components.Web
+                    """),
+                filePath: TestProjectData.SomeProjectComponentImportFile1.FilePath);
 
         return solution.GetAdditionalDocument(documentId).AssumeNotNull();
     }

src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/ServiceFactoryMap.cs

@@ -8,7 +8,7 @@
 using System;
 using Xunit;
 
-namespace Microsoft.VisualStudio.LanguageServices.Razor.Test.Cohost;
+namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
 
 internal static class ServiceFactoryMap
 {

src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/TestRemoteServiceProvider.cs

@@ -11,12 +11,12 @@
 using Microsoft.CodeAnalysis.Razor.Remote;
 using Microsoft.VisualStudio.Composition;
 
-namespace Microsoft.VisualStudio.LanguageServices.Razor.Test.Cohost;
+namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
 
 /// <summary>
 /// An implementation of IRemoteServiceProvider that doesn't actually do anything remote, but rather directly calls service methods
 /// </summary>
-internal class TestRemoteServiceProvider(ExportProvider exportProvider) : IRemoteServiceProvider, IDisposable
+internal sealed class TestRemoteServiceProvider(ExportProvider exportProvider) : IRemoteServiceProvider, IDisposable
 {
     private readonly TestServiceBroker _testServiceBroker = new TestServiceBroker();
     private readonly Dictionary<Type, IDisposable> _services = new Dictionary<Type, IDisposable>();

src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/TestServiceBroker.cs

@@ -9,9 +9,9 @@
 using Microsoft.CodeAnalysis.ExternalAccess.Razor;
 using Microsoft.CodeAnalysis.Remote.Razor;
 
-namespace Microsoft.VisualStudio.LanguageServices.Razor.Test.Cohost;
+namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
 
-internal class TestServiceBroker : IRazorServiceBroker
+internal sealed class TestServiceBroker : IRazorServiceBroker
 {
     private Solution? _solution;