Function expectText

packages/private/testing/src/utils.ts:245–258

(
  text: string | RegExp,
  options: ExpectTextOptions = {},
)

 * ```
 */
export async function expectText(
  text: string | RegExp,
  options: ExpectTextOptions = {},
): Promise<void> {
  const container = options.container || TestBed.getLastFixture().nativeElement;
  await waitFor(() => {
    const content = container.textContent || '';
    if (typeof text === 'string') {
      throwUnless(content).toContain(text);
    } else {
      throwUnless(text.test(content)).toBeTrue();
    }
  }, options);
}

// Intentionally does not participate in fake clocks.
const realNow = performance.now.bind(performance);