Function promiseValidator

packages/forms/test/validators_spec.ts:472–477

(response: {[key: string]: any})

    describe('composeAsync', () => {
      describe('promises', () => {
        function promiseValidator(response: {[key: string]: any}): AsyncValidatorFn {
          return (c: AbstractControl) => {
            const res = c.value != 'expected' ? response : null;
            return Promise.resolve(res);
          };
        }

        it('should return null when given null', () => {
          expect(Validators.composeAsync(null!)).toBeNull();