Method validate

packages/forms/test/validators_spec.ts:40–46

(c: any)

    ) {}

    validate(c: any): Observable<ValidationErrors> {
      return new Observable((obs: any) => {
        const error = this.expected !== c.value ? this.error : null;
        obs.next(error);
        obs.complete();
      });
    }
  }

  describe('Validators', () => {