add remote server cli test

extensions/vscode-api-tests/src/singlefolder-tests/extensions.test.ts

@@ -0,0 +1,22 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import 'mocha';
+import * as assert from 'assert';
+import * as vscode from 'vscode';
+
+suite('vscode server cli', () => {
+
+	const extension = process.env.TESTRESOLVER_INSTALL_BUILTIN_EXTENSION;
+	const skip = !process.env.BUILD_SOURCEVERSION // Skip it when running out of sources
+		|| !process.env.REMOTE_VSCODE // Skip it when not a remote integration test
+		|| !extension // Skip it when extension is not provided to server
+		;
+
+	(skip ? test.skip : test)('extension is installed and enabled when installed by server cli', function () {
+		assert.ok(vscode.extensions.getExtension(extension!));
+	});
+
+});