message: test(forms): add test on applying unicode flag
  PR Close
diff: @@ -11,6 +11,7 @@ import {describe, expect, it} from '@angular/core/testing/src/testing_internal';
  import {AbstractControl, AsyncValidatorFn, FormArray, FormControl, Validators} from '@angular/forms';
  import {normalizeAsyncValidator} from '@angular/forms/src/directives/normalize_validator';
  import {AsyncValidator, ValidationErrors, ValidatorFn} from '@angular/forms/src/directives/validators';
  +import {browserDetection} from '@angular/platform-browser/testing/src/browser_util';
  import {Observable, of , timer} from 'rxjs';
  import {first, map} from 'rxjs/operators';
  @@ -274,6 +275,13 @@ import {first, map} from 'rxjs/operators';
  it('should not error on "undefined" pattern',
  () => expect(Validators.pattern(undefined !)(new FormControl('aaAA'))).toBeNull());
  + if (browserDetection.supportsRegExUnicodeFlag) {
  + it('should apply unicode flag to pattern when supported', () => {
  + expect(Validators.pattern('[\u{10000}-\u{10001}]')(new FormControl('\u{10000}')))
  + .toBeNull();
  + });
  + }
  +
  it('should work with pattern string containing both boundary symbols',
  () => expect(Validators.pattern('^[aA]*$')(new FormControl('aaAA'))).toBeNull());
  