Function asyncTest

packages/zone.js/test/test-util.ts:98–112

(this: unknown, testFn: Function, zone: Zone = Zone.current)

(isSupportSetErrorStack as any).message = 'supportSetErrorStack';

export function asyncTest(this: unknown, testFn: Function, zone: Zone = Zone.current) {
  const AsyncTestZoneSpec = (Zone as any)['AsyncTestZoneSpec'];
  return (done: Function) => {
    let asyncTestZone: Zone = zone.fork(
      new AsyncTestZoneSpec(
        () => {},
        (error: Error) => {
          fail(error);
        },
        'asyncTest',
      ),
    );
    asyncTestZone.run(testFn, this, [done]);
  };
}

export function isFirefox() {
  const userAgent = navigator.userAgent.toLowerCase();