Class MockConsole

packages/core/test/application_ref_spec.ts:1055–1067

});

class MockConsole {
  res: any[][] = [];
  log(...args: any[]): void {
    // Logging from ErrorHandler should run outside of the Angular Zone.
    NgZone.assertNotInAngularZone();
    this.res.push(args);
  }
  error(...args: any[]): void {
    // Logging from ErrorHandler should run outside of the Angular Zone.
    NgZone.assertNotInAngularZone();
    this.res.push(args);
  }
}