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/problems/problems.ts

@@ -0,0 +1,53 @@
+/*---------------------------------------------------------------------------------------------
+ *  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';
+
+export enum ProblemSeverity {
+	WARNING = 0,
+	ERROR = 1
+};
+
+export class Problems {
+
+	static PROBLEMS_VIEW_SELECTOR = '.panel.markers-panel';
+
+	constructor(private spectron: SpectronApplication) {
+		// noop
+	}
+
+	public async showProblemsView(): Promise<any> {
+		if (!await this.isVisible()) {
+			await this.spectron.runCommand('workbench.actions.view.problems');
+			await this.waitForProblemsView();
+		}
+	}
+
+	public async hideProblemsView(): Promise<any> {
+		if (await this.isVisible()) {
+			await this.spectron.runCommand('workbench.actions.view.problems');
+			await this.spectron.client.waitForElement(Problems.PROBLEMS_VIEW_SELECTOR, el => !el);
+		}
+	}
+
+	public async isVisible(): Promise<boolean> {
+		const element = await this.spectron.client.element(Problems.PROBLEMS_VIEW_SELECTOR);
+		return !!element;
+	}
+
+	public async waitForProblemsView(): Promise<void> {
+		await this.spectron.client.waitForElement(Problems.PROBLEMS_VIEW_SELECTOR);
+	}
+
+	public static getSelectorInProblemsView(problemType: ProblemSeverity): string {
+		let selector = problemType === ProblemSeverity.WARNING ? 'warning' : 'error';
+		return `div[aria-label="Problems grouped by files"] .icon.${selector}`;
+	}
+
+	public static getSelectorInEditor(problemType: ProblemSeverity): string {
+		let selector = problemType === ProblemSeverity.WARNING ? 'warningsquiggly' : 'errorsquiggly';
+		return `.view-overlays .cdr.${selector}`;
+	}
+}