import {NgZone} from 'angular2/src/core/zone/ng_zone'; export class MockNgZone extends NgZone { _onEventDone: () => void; constructor() { super({enableLongStackTrace: false}); } run(fn: Function): any { return fn(); } runOutsideAngular(fn: Function): any { return fn(); } overrideOnEventDone(fn: () => void, opt_waitForAsync: boolean = false): void { this._onEventDone = fn; } simulateZoneExit(): void { this._onEventDone(); } }