wait-fake-async.md

🏠   →   Documentation   →   Built-In Functionality   →   waitFakeAsync

Other Predicates:   attributes ・ callLifeCycleHook ・call ・ clicked ・ debug ・ detectChanges・ emit ・ provider ・state ・waitFakeAsync

---

This predicate waits the specified amount of time within a fakeAsync-zone.

Please Note

This predicate only works in a fakeAsync-zone. If not called in a fakeAsync-zone it will throw causing the test case to fail.

Signature

waitFakeAsync(modeOrMs?: 'animationFrame' | number);

Example

import { state, waitFakeAsync, haveText, haveEmitted } from '@centigrade/ngtx';
import { fakeAsync } from '@angular/core/testing';
import { of } from 'rxjs';

class the {
  static GreetingLabel() {
    return get('h2');
  }
}

it('should render the correct welcome message', fakeAsync(() => {
  When(host)
    .has(state({ userName$: of('Ann') }))
    .and(waitFakeAsync())
    .expect(the.GreetingLabel)
    .to(haveText('Welcome Ann!'));
}));

it('[Popup] should emit a close event after five seconds', fakeAsync(() => {
  When(host)
    .rendered()
    .and(waitFakeAsync(5000))
    .expect(host)
    .to(haveEmitted('close'));
}));