import * as assert from 'assert'; import { before } from 'mocha'; // You can import and use all API from the 'vscode' module // as well as import your extension to test it import * as vscode from 'vscode'; // import * as myExtension from '../extension'; suite('Extension Test Suite', () => { before(() => { vscode.window.showInformationMessage('Start all tests.'); }); });