Refresh master with initial release/0.24 snapshot (#332)

* Initial port of release/0.24 source code

* Fix additional headers

* Fix a typo in launch.json

test/smoke/src/areas/extensions/extensions.ts

@@ -0,0 +1,42 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { SpectronApplication } from '../../spectron/application';
+import { Viewlet } from '../workbench/viewlet';
+
+const SEARCH_BOX = 'div.extensions-viewlet[id="workbench.view.extensions"] input.search-box';
+
+export class Extensions extends Viewlet {
+
+	constructor(spectron: SpectronApplication) {
+		super(spectron);
+	}
+
+	async openExtensionsViewlet(): Promise<any> {
+		await this.spectron.runCommand('workbench.view.extensions');
+		await this.waitForExtensionsViewlet();
+	}
+
+	async waitForExtensionsViewlet(): Promise<any> {
+		await this.spectron.client.waitForActiveElement(SEARCH_BOX);
+	}
+
+	async searchForExtension(name: string): Promise<any> {
+		await this.spectron.client.click(SEARCH_BOX);
+		await this.spectron.client.waitForActiveElement(SEARCH_BOX);
+		await this.spectron.client.setValue(SEARCH_BOX, name);
+	}
+
+	async installExtension(name: string): Promise<boolean> {
+		await this.searchForExtension(name);
+
+		// we might want to wait for a while longer since the Marketplace can be slow
+		// a minute should do
+		await this.spectron.client.waitFor(() => this.spectron.client.click(`div.extensions-viewlet[id="workbench.view.extensions"] .monaco-list-row[aria-label="${name}"] .extension li[class='action-item'] .extension-action.install`), void 0, 'waiting for install button', 600);
+
+		await this.spectron.client.waitForElement(`div.extensions-viewlet[id="workbench.view.extensions"] .monaco-list-row[aria-label="${name}"] .extension li[class='action-item'] .extension-action.reload`);
+		return true;
+	}
+}