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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://angular.io/api/core/testing/tick