Asynchronous Tests (fakeAsync, tick, async, waitForAsync)

Angular supports asynchronous testing.

fakeAsync Example

import { fakeAsync, tick } from "@angular/core/testing";

it("should wait for async task", fakeAsync(() => {
  let done = false;

  setTimeout(() => {
    done = true;
  }, 1000);

  tick(1000);

  expect(done).toBeTrue();
}));