Class NoOpAsyncValidator

packages/forms/test/reactive_integration_spec.ts:4147–4168

        }

        @Directive({
          selector: '[ng-noop-async-validator]',
          providers: [
            {
              provide: NG_ASYNC_VALIDATORS,
              useExisting: forwardRef(() => NoOpAsyncValidator),
              multi: true,
            },
          ],
          standalone: false,
        })
        class NoOpAsyncValidator implements AsyncValidator {
          @Input() validatorInput = '';

          validate(c: AbstractControl) {
            return Promise.resolve(null);
          }

          public registerOnValidatorChange(fn: () => void) {
            registerOnAsyncValidatorChangeFired++;
          }
        }

        @Component({
          selector: 'ng-model-noop-validation',