return pfs.copy(_sourceDir, _testDir).then(() => {
			const encodingOverride: IEncodingOverride[] = [];
			encodingOverride.push({
				extension: 'js',
				encoding: 'utf16le'
			});

			const configurationService = new TestConfigurationService();
			configurationService.setUserConfiguration('files', { encoding: 'windows1252' });

			const textResourceConfigurationService = new TestTextResourceConfigurationService(configurationService);

			const _service = new FileService(
				new TestContextService(new Workspace(_testDir, _testDir, toWorkspaceFolders([{ path: _testDir }]))),
				TestEnvironmentService,
				textResourceConfigurationService,
				configurationService,
				new TestLifecycleService(),
				new TestStorageService(),
				new TestNotificationService(),
				{
					encodingOverride,
					disableWatcher: true
				});

			return _service.resolveContent(uri.file(path.join(testDir, 'index.html'))).then(c => {
				assert.equal(c.encoding, 'windows1252');

				return _service.resolveContent(uri.file(path.join(testDir, 'deep', 'conway.js'))).then(c => {
					assert.equal(c.encoding, 'utf16le');

					// teardown
					_service.dispose();
				});
			});
		});

	test('createFile (allows to overwrite existing)', function () {
		let event: FileOperationEvent;
		const toDispose = service.onAfterOperation(e => {
			event = e;
		});

		const contents = 'Hello World';
		const resource = uri.file(path.join(testDir, 'test.txt'));

		fs.writeFileSync(resource.fsPath, ''); // create file

		return service.createFile(resource, contents, { overwrite: true }).then(s => {
			assert.equal(s.name, 'test.txt');
			assert.equal(fs.existsSync(s.resource.fsPath), true);
			assert.equal(fs.readFileSync(s.resource.fsPath), contents);

			assert.ok(event);
			assert.equal(event.resource.fsPath, resource.fsPath);
			assert.equal(event.operation, FileOperation.CREATE);
			assert.equal(event.target.resource.fsPath, resource.fsPath);
			toDispose.dispose();
		});
	});

			return service.moveFile(source.resource, uri.file(path.join(path.dirname(source.resource.fsPath), 'CONWAY.js'))).then(renamed => {
				assert.equal(fs.existsSync(renamed.resource.fsPath), true);
				assert.ok(fs.readdirSync(testDir).some(f => f === 'CONWAY.js'));

				return service.resolveFile(uri.file(path.join(testDir, 'deep', 'conway.js'))).then(source => {
					const targetParent = uri.file(testDir);
					const target = targetParent.with({ path: path.posix.join(targetParent.path, path.posix.basename(source.resource.path)) });

					return service.copyFile(source.resource, target, true).then(res => { // CONWAY.js => conway.js
						assert.equal(fs.existsSync(res.resource.fsPath), true);
						assert.ok(fs.readdirSync(testDir).some(f => f === 'conway.js'));
					});
				});
			});

	test('updateContent (ITextSnapShot)', function () {
		const resource = uri.file(path.join(testDir, 'small.txt'));

		return service.resolveContent(resource).then(c => {
			assert.equal(c.value, 'Small File');

			const model = TextModel.createFromString('Updates to the small file');

			return service.updateContent(c.resource, model.createSnapshot()).then(c => {
				assert.equal(fs.readFileSync(resource.fsPath), 'Updates to the small file');

				model.dispose();
			});
		});
	});

		return service.resolveFile(uri.file(testDir)).then(parent => {
			const resource = uri.file(path.join(parent.resource.fsPath, 'newFolder'));

			return service.createFolder(resource).then(f => {
				assert.equal(f.name, 'newFolder');
				assert.equal(fs.existsSync(f.resource.fsPath), true);

				assert.ok(event);
				assert.equal(event.resource.fsPath, resource.fsPath);
				assert.equal(event.operation, FileOperation.CREATE);
				assert.equal(event.target.resource.fsPath, resource.fsPath);
				assert.equal(event.target.isDirectory, true);
				toDispose.dispose();
			});
		});