Enable async completion

azure-pipelines-integration.yml

@@ -22,16 +22,24 @@ jobs:
 - job: Windows_VisualStudio_Integration_Tests
   pool: dotnet-external-vs2019-preview
   strategy:
-    maxParallel: 2
+    maxParallel: 4
     matrix:
       debug:
         _configuration: Debug
+        _useLegacyCompletion: false
       release:
         _configuration: Release
+        _useLegacyCompletion: false
+      debug_legacy:
+        _configuration: Debug
+        _useLegacyCompletion: true
+      release_legacy:
+        _configuration: Release
+        _useLegacyCompletion: true
   timeoutInMinutes: 135
 
   steps:
-    - script: eng/cibuild.cmd -configuration $(_configuration) -prepareMachine -testVsi 
+    - script: eng/cibuild.cmd -configuration $(_configuration) -prepareMachine -testVsi -testLegacyCompletion:$$(_useLegacyCompletion)
       displayName: Build and Test
 
     - task: PublishTestResults@1
@@ -40,14 +48,14 @@ jobs:
         testRunner: XUnit
         testResultsFiles: $(Build.SourcesDirectory)\artifacts\TestResults\$(_configuration)\*.xml
         mergeTestResults: true
-        testRunTitle: 'Windows Visual Studio Integration $(_configuration)' 
+        testRunTitle: 'Windows Visual Studio Integration $(_configuration)_$(_useLegacyCompletion)' 
       condition: always()
 
     - task: PublishBuildArtifacts@1
       displayName: Publish Logs
       inputs:
         PathtoPublish: '$(Build.SourcesDirectory)\artifacts\log\$(_configuration)'
-        ArtifactName: 'Windows Visual Studio Integration $(_configuration)'
+        ArtifactName: 'Windows Visual Studio Integration $(_configuration)_$(_useLegacyCompletion)'
         publishLocation: Container
       continueOnError: true
       condition: not(succeeded())
@@ -56,7 +64,7 @@ jobs:
       displayName: Publish Screenshots
       inputs:
         PathtoPublish: '$(Build.SourcesDirectory)\artifacts\bin\Microsoft.VisualStudio.LanguageServices.IntegrationTests\$(_configuration)\net472\xUnitResults'
-        ArtifactName: 'Screenshots $(_configuration)' 
+        ArtifactName: 'Screenshots $(_configuration)_$(_useLegacyCompletion)' 
         publishLocation: Container
       continueOnError: true
       condition: not(succeeded())

eng/build.ps1

@@ -57,6 +57,7 @@ param (
     [switch][Alias('test')]$testDesktop,
     [switch]$testCoreClr,
     [switch]$testIOperation,
+    [switch]$testLegacyCompletion,
 
     [parameter(ValueFromRemainingArguments=$true)][string[]]$properties)
 
@@ -87,6 +88,7 @@ function Print-Usage() {
     Write-Host "  -testCoreClr              Run CoreClr unit tests"
     Write-Host "  -testVsi                  Run all integration tests"
     Write-Host "  -testIOperation           Run extra checks to validate IOperations"
+    Write-Host "  -testLegacyCompletion     Run integration tests with legacy completion"
     Write-Host ""
     Write-Host "Advanced settings:"
     Write-Host "  -ci                       Set when running on CI server"
@@ -325,6 +327,10 @@ function TestUsingOptimizedRunner() {
         $env:ROSLYN_TEST_IOPERATION = "true"
     }
 
+    if ($testLegacyCompletion) {
+        $env:ROSLYN_TEST_LEGACY_COMPLETION = "true"
+    }
+
     $testResultsDir = Join-Path $ArtifactsDir "TestResults\$configuration"
     $binDir = Join-Path $ArtifactsDir "bin" 
     $runTests = GetProjectOutputBinary "RunTests.exe"
@@ -397,6 +403,9 @@ function TestUsingOptimizedRunner() {
         if ($testIOperation) {
             Remove-Item env:\ROSLYN_TEST_IOPERATION
         }
+        if ($testLegacyCompletion) {
+            Remove-Item env:\ROSLYN_TEST_LEGACY_COMPLETION
+        }
     }
 }
 

src/EditorFeatures/Core/Implementation/IntelliSense/Completion/AsyncCompletionService.cs

@@ -162,5 +162,21 @@ private ImmutableHashSet<char> GetAllAutoBraceCompletionChars(IContentType buffe
 
             return set;
         }
+
+        internal TestAccessor GetTestAccessor()
+            => new TestAccessor(this);
+
+        internal readonly struct TestAccessor
+        {
+            private readonly AsyncCompletionService _asyncCompletionService;
+
+            public TestAccessor(AsyncCompletionService asyncCompletionService)
+            {
+                _asyncCompletionService = asyncCompletionService;
+            }
+
+            internal bool UseLegacyCompletion(ITextView textView, ITextBuffer subjectBuffer)
+                => _asyncCompletionService.UseLegacyCompletion(textView, subjectBuffer);
+        }
     }
 }

src/VisualStudio/IntegrationTest/IntegrationTests/AbstractEditorTest.cs

@@ -51,7 +51,7 @@ public override async Task InitializeAsync()
                     _projectTemplate != WellKnownProjectTemplates.WpfApplication &&
                     _projectTemplate != WellKnownProjectTemplates.CSharpNetCoreClassLibrary)
                 {
-                    VisualStudio.Workspace.SetUseSuggestionMode(false);
+                    VisualStudio.Editor.SetUseSuggestionMode(false);
                     ClearEditor();
                 }
             }

src/VisualStudio/IntegrationTest/IntegrationTests/AbstractIntegrationTest.cs

@@ -63,6 +63,13 @@ public virtual async Task InitializeAsync()
         /// </summary>
         public virtual Task DisposeAsync()
         {
+            if (VisualStudio?.Editor.IsCompletionActive() ?? false)
+            {
+                // Make sure completion isn't visible.
+                // 🐛 Only needed as a workaround for https://devdiv.visualstudio.com/DevDiv/_workitems/edit/801435
+                VisualStudio.SendKeys.Send(VirtualKey.Escape);
+            }
+
             _visualStudioContext.Dispose();
             return Task.CompletedTask;
         }

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

@@ -1,5 +1,7 @@
 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
+using System;
+using System.Linq;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.Test.Utilities;
 using Microsoft.VisualStudio.IntegrationTest.Utilities;
@@ -87,7 +89,7 @@ public static class NavigateTo
         [WpfFact, Trait(Traits.Feature, Traits.Features.Completion)]
         public void CtrlAltSpace()
         {
-            VisualStudio.Workspace.SetUseSuggestionMode(false);
+            VisualStudio.Editor.SetUseSuggestionMode(false);
 
             VisualStudio.Editor.SendKeys("nam Goo", VirtualKey.Enter);
             VisualStudio.Editor.SendKeys('{', VirtualKey.Enter, '}', VirtualKey.Up, VirtualKey.Enter);
@@ -99,7 +101,7 @@ public void CtrlAltSpace()
             VisualStudio.Editor.Verify.CurrentLineText("System.Console.WriteLine();$$", assertCaretPosition: true);
             VisualStudio.Editor.SendKeys(VirtualKey.Home, Shift(VirtualKey.End), VirtualKey.Delete);
 
-            VisualStudio.ExecuteCommand(WellKnownCommandNames.Edit_ToggleCompletionMode);
+            VisualStudio.Editor.SendKeys(new KeyPress(VirtualKey.Space, ShiftState.Ctrl | ShiftState.Alt));
 
             VisualStudio.Editor.SendKeys("System.Console.writeline();");
             VisualStudio.Editor.Verify.CurrentLineText("System.Console.writeline();$$", assertCaretPosition: true);
@@ -108,13 +110,13 @@ public void CtrlAltSpace()
         [WpfFact, Trait(Traits.Feature, Traits.Features.Completion)]
         public void CtrlAltSpaceOption()
         {
-            VisualStudio.Workspace.SetUseSuggestionMode(false);
+            VisualStudio.Editor.SetUseSuggestionMode(false);
 
             VisualStudio.Editor.SendKeys("nam Goo");
             VisualStudio.Editor.Verify.CurrentLineText("namespace Goo$$", assertCaretPosition: true);
 
             ClearEditor();
-            VisualStudio.Workspace.SetUseSuggestionMode(true);
+            VisualStudio.Editor.SetUseSuggestionMode(true);
 
             VisualStudio.Editor.SendKeys("nam Goo");
             VisualStudio.Editor.Verify.CurrentLineText("nam Goo$$", assertCaretPosition: true);
@@ -157,6 +159,20 @@ void Main(string[] args)
             VisualStudio.Editor.SendKeys("<s");
             VisualStudio.Editor.Verify.CompletionItemsExist("see", "seealso", "summary");
 
+            if (LegacyCompletionCondition.Instance.ShouldSkip)
+            {
+                // 🐛 Workaround for https://github.com/dotnet/roslyn/issues/33824
+                var completionItems = VisualStudio.Editor.GetCompletionItems();
+                var targetIndex = Array.IndexOf(completionItems, "see");
+                var currentIndex = Array.IndexOf(completionItems, VisualStudio.Editor.GetCurrentCompletionItem());
+                if (currentIndex != targetIndex)
+                {
+                    var key = currentIndex < targetIndex ? VirtualKey.Down : VirtualKey.Up;
+                    var keys = Enumerable.Repeat(key, Math.Abs(currentIndex - targetIndex)).Cast<object>().ToArray();
+                    VisualStudio.Editor.SendKeys(keys);
+                }
+            }
+
             VisualStudio.Editor.SendKeys(VirtualKey.Enter);
             VisualStudio.Editor.Verify.CurrentLineText("///<see cref=\"$$\"/>", assertCaretPosition: true);
         }
@@ -193,15 +209,17 @@ void Main(string[] args)
     }
 }");
 
-            VisualStudio.Workspace.SetUseSuggestionMode(false);
+            VisualStudio.Editor.SetUseSuggestionMode(false);
 
             VisualStudio.Editor.SendKeys("Mai(");
 
             VisualStudio.Editor.Verify.CurrentSignature("void Class1.Main(string[] args)");
             VisualStudio.Editor.Verify.CurrentParameter("args", "");
         }
 
-        [WpfFact, Trait(Traits.Feature, Traits.Features.Completion)]
+        // 🐛 The async completion controller in 16.0 Preview 4 fails to account for brace completion sessions.
+        [ConditionalWpfFact(typeof(LegacyCompletionCondition)), Trait(Traits.Feature, Traits.Features.Completion)]
+        [WorkItem(33825, "https://github.com/dotnet/roslyn/issues/33825")]
         public void CompletionUsesTrackingPointsInTheFaceOfAutomaticBraceCompletion()
         {
             SetUpEditor(@"
@@ -211,7 +229,7 @@ void Main(string[] args)
     $$
 }");
 
-            VisualStudio.Workspace.SetUseSuggestionMode(false);
+            VisualStudio.Editor.SetUseSuggestionMode(false);
 
             VisualStudio.Editor.SendKeys(
                 '{',
@@ -232,7 +250,9 @@ void Main(string[] args)
 assertCaretPosition: true);
         }
 
-        [WpfFact, Trait(Traits.Feature, Traits.Features.Completion)]
+        // 🐛 This should work with async completion, but currently does not.
+        [ConditionalWpfFact(typeof(LegacyCompletionCondition)), Trait(Traits.Feature, Traits.Features.Completion)]
+        [WorkItem(33823, "https://github.com/dotnet/roslyn/issues/33823")]
         public void CommitOnShiftEnter()
         {
             SetUpEditor(@"
@@ -244,7 +264,7 @@ void Main(string[] args)
     }
 }");
 
-            VisualStudio.Workspace.SetUseSuggestionMode(false);
+            VisualStudio.Editor.SetUseSuggestionMode(false);
 
             VisualStudio.Editor.SendKeys(
                 'M',
@@ -261,6 +281,36 @@ void Main(string[] args)
 assertCaretPosition: true);
         }
 
+        [WpfFact, Trait(Traits.Feature, Traits.Features.Completion)]
+        public void LineBreakOnShiftEnter()
+        {
+            SetUpEditor(@"
+class Class1
+{
+    void Main(string[] args)
+    {
+        $$
+    }
+}");
+
+            VisualStudio.Editor.SetUseSuggestionMode(true);
+
+            VisualStudio.Editor.SendKeys(
+                'M',
+                Shift(VirtualKey.Enter));
+
+            VisualStudio.Editor.Verify.TextContains(@"
+class Class1
+{
+    void Main(string[] args)
+    {
+        M
+$$
+    }
+}",
+assertCaretPosition: true);
+        }
+
         [WpfFact, Trait(Traits.Feature, Traits.Features.Completion)]
         public void CommitOnLeftCurly()
         {
@@ -270,7 +320,7 @@ class Class1
     $$
 }");
 
-            VisualStudio.Workspace.SetUseSuggestionMode(false);
+            VisualStudio.Editor.SetUseSuggestionMode(false);
 
             VisualStudio.Editor.SendKeys("int P { g{");
 
@@ -282,26 +332,31 @@ class Class1
 assertCaretPosition: true);
         }
 
-        [WpfFact, Trait(Traits.Feature, Traits.Features.Completion)]
+        [ConditionalWpfFact(typeof(LegacyCompletionCondition)), Trait(Traits.Feature, Traits.Features.Completion)]
+        [WorkItem(33822, "https://github.com/dotnet/roslyn/issues/33822")]
         public void EnsureTheCaretIsVisibleAfterALongEdit()
         {
-            SetUpEditor(@"
+            var visibleColumns = VisualStudio.Editor.GetVisibleColumnCount();
+            var variableName = new string('a', (int)(0.75 * visibleColumns));
+            SetUpEditor($@"
 public class Program
-{
+{{
     static void Main(string[] args)
-    {
-        var aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa = 0;
-        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa = $$
-    }
-}");
+    {{
+        var {variableName} = 0;
+        {variableName} = $$
+    }}
+}}");
 
+            Assert.True(variableName.Length > 0);
             VisualStudio.Editor.SendKeys(
                 VirtualKey.Delete,
                 "aaa",
                 VirtualKey.Tab);
             var actualText = VisualStudio.Editor.GetText();
-            Assert.Contains("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", actualText);
+            Assert.Contains($"{variableName} = {variableName}", actualText);
             Assert.True(VisualStudio.Editor.IsCaretOnScreen());
+            Assert.True(VisualStudio.Editor.GetCaretColumn() > visibleColumns, "This test is inconclusive if the view didn't need to move to keep the caret on screen.");
         }
 
         [WpfFact, Trait(Traits.Feature, Traits.Features.Completion)]

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

@@ -97,7 +97,6 @@ public async Task WpfInteractionAsync()
         [WpfFact]
         public void TypingHelpDirectiveWorks()
         {
-            VisualStudio.Workspace.SetUseSuggestionMode(true);
             VisualStudio.InteractiveWindow.ShowWindow(waitForPrompt: true);
 
             // Directly type #help, rather than sending it through VisualStudio.InteractiveWindow.SubmitText. We want to actually test

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

@@ -18,7 +18,6 @@ public CSharpInteractiveDirectives(VisualStudioInstanceFactory instanceFactory)
         [WpfFact]
         public void VerifyHostCommandsCompletionList()
         {
-            VisualStudio.Workspace.SetUseSuggestionMode(true);
             VisualStudio.InteractiveWindow.InsertCode("#");
             VisualStudio.InteractiveWindow.InvokeCompletionList();
 

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

@@ -16,15 +16,9 @@ public CSharpReplIdeFeatures(VisualStudioInstanceFactory instanceFactory)
         {
         }
 
-        public override async Task InitializeAsync()
-        {
-            await base.InitializeAsync().ConfigureAwait(true);
-            VisualStudio.Workspace.SetUseSuggestionMode(true);
-        }
-
         public override Task DisposeAsync()
         {
-            VisualStudio.Workspace.SetUseSuggestionMode(false);
+            VisualStudio.Editor.SetUseSuggestionMode(false);
             VisualStudio.InteractiveWindow.ClearReplText();
             VisualStudio.InteractiveWindow.Reset();
             return base.DisposeAsync();