tick

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< @angular/core‎ | testingAngular/docs/8/api/core/testing/tick


tick

function

Simulates the asynchronous passage of time for the timers in the fakeAsync zone.

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tick(millis: number = 0): void

Parameters
millis number Optional. Default is 0.
Returns

void


Description

The microtasks queue is drained at the very start of this function and after any timer callback has been executed.

Usage notes

Example

describe('this test', () => {
  it('looks async but is synchronous', <any>fakeAsync((): void => {
       let flag = false;
       setTimeout(() => { flag = true; }, 100);
       expect(flag).toBe(false);
       tick(50);
       expect(flag).toBe(false);
       tick(50);
       expect(flag).toBe(true);
     }));
});

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Licensed under the Creative Commons Attribution License 4.0.
https://v8.angular.io/api/core/testing/tick