Type completion with tooltips

src/PowerShellEditorServices/Services/TextDocument/Handlers/CompletionHandler.cs

@@ -251,6 +251,7 @@ private static CompletionItem CreateCompletionItem(
 
             switch (completionDetails.CompletionType)
             {
+                case CompletionType.Type:
                 case CompletionType.ParameterValue:
                 case CompletionType.Method:
                 case CompletionType.Property:

test/PowerShellEditorServices.Test.Shared/Completion/CompleteTypeName.cs

@@ -0,0 +1,30 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using Microsoft.PowerShell.EditorServices.Services.TextDocument;
+
+namespace Microsoft.PowerShell.EditorServices.Test.Shared.Completion
+{
+    internal class CompleteTypeName
+    {
+        public static readonly ScriptRegion SourceDetails =
+            new ScriptRegion(
+                file: TestUtilities.NormalizePath("Completion/CompletionExamples.psm1"),
+                text: string.Empty,
+                startLineNumber: 21,
+                startColumnNumber: 25,
+                startOffset: 0,
+                endLineNumber: 0,
+                endColumnNumber: 0,
+                endOffset: 0);
+
+        public static readonly CompletionDetails ExpectedCompletion =
+            CompletionDetails.Create(
+                "ArrayList",
+                CompletionType.Type,
+                "System.Collections.ArrayList"
+            );
+    }
+}

test/PowerShellEditorServices.Test.Shared/Completion/CompletionExamples.psm1

@@ -17,3 +17,5 @@ function Test-Completion {
 }
 
 Get-ChildItem /
+
+[System.Collections.ArrayList].GetType()

test/PowerShellEditorServices.Test/Language/LanguageServiceTests.cs

@@ -92,6 +92,29 @@ await this.GetCompletionResults(
             Assert.NotNull(completionResults.Completions[0].ToolTipText);
         }
 
+        [Trait("Category", "Completions")]
+        [Fact]
+        public async Task LanguageServiceCompletesTypeName()
+        {
+            CompletionResults completionResults =
+                await this.GetCompletionResults(
+                    CompleteTypeName.SourceDetails);
+
+            Assert.NotEmpty(completionResults.Completions);
+
+            Assert.Equal(
+                CompleteTypeName.ExpectedCompletion.CompletionText,
+                completionResults.Completions[0].CompletionText
+            );
+
+            Assert.Equal(
+                CompleteTypeName.ExpectedCompletion.CompletionType,
+                completionResults.Completions[0].CompletionType
+            );
+
+            Assert.NotNull(completionResults.Completions[0].ToolTipText);
+        }
+
         [Trait("Category", "Completions")]
         [Fact]
         public async Task LanguageServiceCompletesVariableInFile()