angular-docs-cn/modules/@angular/forms/test/form_control_spec.ts

995 lines
30 KiB
TypeScript

/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {fakeAsync, tick} from '@angular/core/testing';
import {AsyncTestCompleter, beforeEach, describe, inject, it} from '@angular/core/testing/testing_internal';
import {FormControl, FormGroup, Validators} from '@angular/forms';
import {EventEmitter} from '../src/facade/async';
import {isPresent} from '../src/facade/lang';
import {FormArray} from '../src/model';
export function main() {
function asyncValidator(expected: string, timeouts = {}) {
return (c: FormControl) => {
let resolve: (result: any) => void;
const promise = new Promise(res => { resolve = res; });
const t = isPresent((timeouts as any)[c.value]) ? (timeouts as any)[c.value] : 0;
const res = c.value != expected ? {'async': true} : null;
if (t == 0) {
resolve(res);
} else {
setTimeout(() => { resolve(res); }, t);
}
return promise;
};
}
function asyncValidatorReturningObservable(c: FormControl) {
const e = new EventEmitter();
Promise.resolve(null).then(() => { e.emit({'async': true}); });
return e;
}
function otherAsyncValidator() { return Promise.resolve({'other': true}); }
function syncValidator(_: any /** TODO #9100 */): any /** TODO #9100 */ { return null; }
describe('FormControl', () => {
it('should default the value to null', () => {
const c = new FormControl();
expect(c.value).toBe(null);
});
describe('boxed values', () => {
it('should support valid boxed values on creation', () => {
const c = new FormControl({value: 'some val', disabled: true}, null, null);
expect(c.disabled).toBe(true);
expect(c.value).toBe('some val');
expect(c.status).toBe('DISABLED');
});
it('should honor boxed value with disabled control when validating', () => {
const c = new FormControl({value: '', disabled: true}, Validators.required);
expect(c.disabled).toBe(true);
expect(c.valid).toBe(false);
expect(c.status).toBe('DISABLED');
});
it('should not treat objects as boxed values if they have more than two props', () => {
const c = new FormControl({value: '', disabled: true, test: 'test'}, null, null);
expect(c.value).toEqual({value: '', disabled: true, test: 'test'});
expect(c.disabled).toBe(false);
});
it('should not treat objects as boxed values if disabled is missing', () => {
const c = new FormControl({value: '', test: 'test'}, null, null);
expect(c.value).toEqual({value: '', test: 'test'});
expect(c.disabled).toBe(false);
});
});
describe('validator', () => {
it('should run validator with the initial value', () => {
const c = new FormControl('value', Validators.required);
expect(c.valid).toEqual(true);
});
it('should rerun the validator when the value changes', () => {
const c = new FormControl('value', Validators.required);
c.setValue(null);
expect(c.valid).toEqual(false);
});
it('should support arrays of validator functions if passed', () => {
const c = new FormControl('value', [Validators.required, Validators.minLength(3)]);
c.setValue('a');
expect(c.valid).toEqual(false);
c.setValue('aaa');
expect(c.valid).toEqual(true);
});
it('should return errors', () => {
const c = new FormControl(null, Validators.required);
expect(c.errors).toEqual({'required': true});
});
it('should set single validator', () => {
const c = new FormControl(null);
expect(c.valid).toEqual(true);
c.setValidators(Validators.required);
c.setValue(null);
expect(c.valid).toEqual(false);
c.setValue('abc');
expect(c.valid).toEqual(true);
});
it('should set multiple validators from array', () => {
const c = new FormControl('');
expect(c.valid).toEqual(true);
c.setValidators([Validators.minLength(5), Validators.required]);
c.setValue('');
expect(c.valid).toEqual(false);
c.setValue('abc');
expect(c.valid).toEqual(false);
c.setValue('abcde');
expect(c.valid).toEqual(true);
});
it('should clear validators', () => {
const c = new FormControl('', Validators.required);
expect(c.valid).toEqual(false);
c.clearValidators();
expect(c.validator).toEqual(null);
c.setValue('');
expect(c.valid).toEqual(true);
});
it('should add after clearing', () => {
const c = new FormControl('', Validators.required);
expect(c.valid).toEqual(false);
c.clearValidators();
expect(c.validator).toEqual(null);
c.setValidators([Validators.required]);
expect(c.validator).not.toBe(null);
});
});
describe('asyncValidator', () => {
it('should run validator with the initial value', fakeAsync(() => {
const c = new FormControl('value', null, asyncValidator('expected'));
tick();
expect(c.valid).toEqual(false);
expect(c.errors).toEqual({'async': true});
}));
it('should support validators returning observables', fakeAsync(() => {
const c = new FormControl('value', null, asyncValidatorReturningObservable);
tick();
expect(c.valid).toEqual(false);
expect(c.errors).toEqual({'async': true});
}));
it('should rerun the validator when the value changes', fakeAsync(() => {
const c = new FormControl('value', null, asyncValidator('expected'));
c.setValue('expected');
tick();
expect(c.valid).toEqual(true);
}));
it('should run the async validator only when the sync validator passes', fakeAsync(() => {
const c = new FormControl('', Validators.required, asyncValidator('expected'));
tick();
expect(c.errors).toEqual({'required': true});
c.setValue('some value');
tick();
expect(c.errors).toEqual({'async': true});
}));
it('should mark the control as pending while running the async validation', fakeAsync(() => {
const c = new FormControl('', null, asyncValidator('expected'));
expect(c.pending).toEqual(true);
tick();
expect(c.pending).toEqual(false);
}));
it('should only use the latest async validation run', fakeAsync(() => {
const c = new FormControl(
'', null, asyncValidator('expected', {'long': 200, 'expected': 100}));
c.setValue('long');
c.setValue('expected');
tick(300);
expect(c.valid).toEqual(true);
}));
it('should support arrays of async validator functions if passed', fakeAsync(() => {
const c =
new FormControl('value', null, [asyncValidator('expected'), otherAsyncValidator]);
tick();
expect(c.errors).toEqual({'async': true, 'other': true});
}));
it('should add single async validator', fakeAsync(() => {
const c = new FormControl('value', null);
c.setAsyncValidators(asyncValidator('expected'));
expect(c.asyncValidator).not.toEqual(null);
c.setValue('expected');
tick();
expect(c.valid).toEqual(true);
}));
it('should add async validator from array', fakeAsync(() => {
const c = new FormControl('value', null);
c.setAsyncValidators([asyncValidator('expected')]);
expect(c.asyncValidator).not.toEqual(null);
c.setValue('expected');
tick();
expect(c.valid).toEqual(true);
}));
it('should clear async validators', fakeAsync(() => {
const c = new FormControl('value', [asyncValidator('expected'), otherAsyncValidator]);
c.clearValidators();
expect(c.asyncValidator).toEqual(null);
}));
it('should not change validity state if control is disabled while async validating',
fakeAsync(() => {
const c = new FormControl('value', [asyncValidator('expected')]);
c.disable();
tick();
expect(c.status).toEqual('DISABLED');
}));
});
describe('dirty', () => {
it('should be false after creating a control', () => {
const c = new FormControl('value');
expect(c.dirty).toEqual(false);
});
it('should be true after changing the value of the control', () => {
const c = new FormControl('value');
c.markAsDirty();
expect(c.dirty).toEqual(true);
});
});
describe('touched', () => {
it('should be false after creating a control', () => {
const c = new FormControl('value');
expect(c.touched).toEqual(false);
});
it('should be true after markAsTouched runs', () => {
const c = new FormControl('value');
c.markAsTouched();
expect(c.touched).toEqual(true);
});
});
describe('setValue', () => {
let g: FormGroup, c: FormControl;
beforeEach(() => {
c = new FormControl('oldValue');
g = new FormGroup({'one': c});
});
it('should set the value of the control', () => {
c.setValue('newValue');
expect(c.value).toEqual('newValue');
});
it('should invoke ngOnChanges if it is present', () => {
let ngOnChanges: any;
c.registerOnChange((v: any) => ngOnChanges = ['invoked', v]);
c.setValue('newValue');
expect(ngOnChanges).toEqual(['invoked', 'newValue']);
});
it('should not invoke on change when explicitly specified', () => {
let onChange: any = null;
c.registerOnChange((v: any) => onChange = ['invoked', v]);
c.setValue('newValue', {emitModelToViewChange: false});
expect(onChange).toBeNull();
});
it('should set the parent', () => {
c.setValue('newValue');
expect(g.value).toEqual({'one': 'newValue'});
});
it('should not set the parent when explicitly specified', () => {
c.setValue('newValue', {onlySelf: true});
expect(g.value).toEqual({'one': 'oldValue'});
});
it('should fire an event', fakeAsync(() => {
c.valueChanges.subscribe((value) => { expect(value).toEqual('newValue'); });
c.setValue('newValue');
tick();
}));
it('should not fire an event when explicitly specified', fakeAsync(() => {
c.valueChanges.subscribe((value) => { throw 'Should not happen'; });
c.setValue('newValue', {emitEvent: false});
tick();
}));
it('should work on a disabled control', () => {
g.addControl('two', new FormControl('two'));
c.disable();
c.setValue('new value');
expect(c.value).toEqual('new value');
expect(g.value).toEqual({'two': 'two'});
});
});
describe('patchValue', () => {
let g: FormGroup, c: FormControl;
beforeEach(() => {
c = new FormControl('oldValue');
g = new FormGroup({'one': c});
});
it('should set the value of the control', () => {
c.patchValue('newValue');
expect(c.value).toEqual('newValue');
});
it('should invoke ngOnChanges if it is present', () => {
let ngOnChanges: any;
c.registerOnChange((v: any) => ngOnChanges = ['invoked', v]);
c.patchValue('newValue');
expect(ngOnChanges).toEqual(['invoked', 'newValue']);
});
it('should not invoke on change when explicitly specified', () => {
let onChange: any = null;
c.registerOnChange((v: any) => onChange = ['invoked', v]);
c.patchValue('newValue', {emitModelToViewChange: false});
expect(onChange).toBeNull();
});
it('should set the parent', () => {
c.patchValue('newValue');
expect(g.value).toEqual({'one': 'newValue'});
});
it('should not set the parent when explicitly specified', () => {
c.patchValue('newValue', {onlySelf: true});
expect(g.value).toEqual({'one': 'oldValue'});
});
it('should fire an event', fakeAsync(() => {
c.valueChanges.subscribe((value) => { expect(value).toEqual('newValue'); });
c.patchValue('newValue');
tick();
}));
it('should not fire an event when explicitly specified', fakeAsync(() => {
c.valueChanges.subscribe((value) => { throw 'Should not happen'; });
c.patchValue('newValue', {emitEvent: false});
tick();
}));
it('should patch value on a disabled control', () => {
g.addControl('two', new FormControl('two'));
c.disable();
c.patchValue('new value');
expect(c.value).toEqual('new value');
expect(g.value).toEqual({'two': 'two'});
});
});
describe('reset()', () => {
let c: FormControl;
beforeEach(() => { c = new FormControl('initial value'); });
it('should reset to a specific value if passed', () => {
c.setValue('new value');
expect(c.value).toBe('new value');
c.reset('initial value');
expect(c.value).toBe('initial value');
});
it('should not set the parent when explicitly specified', () => {
const g = new FormGroup({'one': c});
c.patchValue('newValue', {onlySelf: true});
expect(g.value).toEqual({'one': 'initial value'});
});
it('should reset to a specific value if passed with boxed value', () => {
c.setValue('new value');
expect(c.value).toBe('new value');
c.reset({value: 'initial value', disabled: false});
expect(c.value).toBe('initial value');
});
it('should clear the control value if no value is passed', () => {
c.setValue('new value');
expect(c.value).toBe('new value');
c.reset();
expect(c.value).toBe(null);
});
it('should update the value of any parent controls with passed value', () => {
const g = new FormGroup({'one': c});
c.setValue('new value');
expect(g.value).toEqual({'one': 'new value'});
c.reset('initial value');
expect(g.value).toEqual({'one': 'initial value'});
});
it('should update the value of any parent controls with null value', () => {
const g = new FormGroup({'one': c});
c.setValue('new value');
expect(g.value).toEqual({'one': 'new value'});
c.reset();
expect(g.value).toEqual({'one': null});
});
it('should mark the control as pristine', () => {
c.markAsDirty();
expect(c.pristine).toBe(false);
c.reset();
expect(c.pristine).toBe(true);
});
it('should set the parent pristine state if all pristine', () => {
const g = new FormGroup({'one': c});
c.markAsDirty();
expect(g.pristine).toBe(false);
c.reset();
expect(g.pristine).toBe(true);
});
it('should not set the parent pristine state if it has other dirty controls', () => {
const c2 = new FormControl('two');
const g = new FormGroup({'one': c, 'two': c2});
c.markAsDirty();
c2.markAsDirty();
c.reset();
expect(g.pristine).toBe(false);
});
it('should mark the control as untouched', () => {
c.markAsTouched();
expect(c.untouched).toBe(false);
c.reset();
expect(c.untouched).toBe(true);
});
it('should set the parent untouched state if all untouched', () => {
const g = new FormGroup({'one': c});
c.markAsTouched();
expect(g.untouched).toBe(false);
c.reset();
expect(g.untouched).toBe(true);
});
it('should not set the parent untouched state if other touched controls', () => {
const c2 = new FormControl('two');
const g = new FormGroup({'one': c, 'two': c2});
c.markAsTouched();
c2.markAsTouched();
c.reset();
expect(g.untouched).toBe(false);
});
it('should retain the disabled state of the control', () => {
c.disable();
c.reset();
expect(c.disabled).toBe(true);
});
it('should set disabled state based on boxed value if passed', () => {
c.disable();
c.reset({value: null, disabled: false});
expect(c.disabled).toBe(false);
});
describe('reset() events', () => {
let g: FormGroup, c2: FormControl, logger: any[];
beforeEach(() => {
c2 = new FormControl('two');
g = new FormGroup({'one': c, 'two': c2});
logger = [];
});
it('should emit one valueChange event per reset control', () => {
g.valueChanges.subscribe(() => logger.push('group'));
c.valueChanges.subscribe(() => logger.push('control1'));
c2.valueChanges.subscribe(() => logger.push('control2'));
c.reset();
expect(logger).toEqual(['control1', 'group']);
});
it('should not fire an event when explicitly specified', fakeAsync(() => {
g.valueChanges.subscribe((value) => { throw 'Should not happen'; });
c.valueChanges.subscribe((value) => { throw 'Should not happen'; });
c2.valueChanges.subscribe((value) => { throw 'Should not happen'; });
c.reset(null, {emitEvent: false});
tick();
}));
it('should emit one statusChange event per reset control', () => {
g.statusChanges.subscribe(() => logger.push('group'));
c.statusChanges.subscribe(() => logger.push('control1'));
c2.statusChanges.subscribe(() => logger.push('control2'));
c.reset();
expect(logger).toEqual(['control1', 'group']);
});
it('should emit one statusChange event per disabled control', () => {
g.statusChanges.subscribe(() => logger.push('group'));
c.statusChanges.subscribe(() => logger.push('control1'));
c2.statusChanges.subscribe(() => logger.push('control2'));
c.reset({value: null, disabled: true});
expect(logger).toEqual(['control1', 'group']);
});
});
});
describe('valueChanges & statusChanges', () => {
let c: FormControl;
beforeEach(() => { c = new FormControl('old', Validators.required); });
it('should fire an event after the value has been updated',
inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
c.valueChanges.subscribe({
next: (value: any) => {
expect(c.value).toEqual('new');
expect(value).toEqual('new');
async.done();
}
});
c.setValue('new');
}));
it('should fire an event after the status has been updated to invalid', fakeAsync(() => {
c.statusChanges.subscribe({
next: (status: any) => {
expect(c.status).toEqual('INVALID');
expect(status).toEqual('INVALID');
}
});
c.setValue('');
tick();
}));
it('should fire an event after the status has been updated to pending', fakeAsync(() => {
const c = new FormControl('old', Validators.required, asyncValidator('expected'));
const log: any[] /** TODO #9100 */ = [];
c.valueChanges.subscribe({next: (value: any) => log.push(`value: '${value}'`)});
c.statusChanges.subscribe({next: (status: any) => log.push(`status: '${status}'`)});
c.setValue('');
tick();
c.setValue('nonEmpty');
tick();
c.setValue('expected');
tick();
expect(log).toEqual([
'' +
'value: \'\'',
'status: \'INVALID\'',
'value: \'nonEmpty\'',
'status: \'PENDING\'',
'status: \'INVALID\'',
'value: \'expected\'',
'status: \'PENDING\'',
'status: \'VALID\'',
]);
}));
// TODO: remove the if statement after making observable delivery sync
it('should update set errors and status before emitting an event',
inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
c.valueChanges.subscribe((value: any /** TODO #9100 */) => {
expect(c.valid).toEqual(false);
expect(c.errors).toEqual({'required': true});
async.done();
});
c.setValue('');
}));
it('should return a cold observable',
inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
c.setValue('will be ignored');
c.valueChanges.subscribe({
next: (value: any) => {
expect(value).toEqual('new');
async.done();
}
});
c.setValue('new');
}));
});
describe('setErrors', () => {
it('should set errors on a control', () => {
const c = new FormControl('someValue');
c.setErrors({'someError': true});
expect(c.valid).toEqual(false);
expect(c.errors).toEqual({'someError': true});
});
it('should reset the errors and validity when the value changes', () => {
const c = new FormControl('someValue', Validators.required);
c.setErrors({'someError': true});
c.setValue('');
expect(c.errors).toEqual({'required': true});
});
it('should update the parent group\'s validity', () => {
const c = new FormControl('someValue');
const g = new FormGroup({'one': c});
expect(g.valid).toEqual(true);
c.setErrors({'someError': true});
expect(g.valid).toEqual(false);
});
it('should not reset parent\'s errors', () => {
const c = new FormControl('someValue');
const g = new FormGroup({'one': c});
g.setErrors({'someGroupError': true});
c.setErrors({'someError': true});
expect(g.errors).toEqual({'someGroupError': true});
});
it('should reset errors when updating a value', () => {
const c = new FormControl('oldValue');
const g = new FormGroup({'one': c});
g.setErrors({'someGroupError': true});
c.setErrors({'someError': true});
c.setValue('newValue');
expect(c.errors).toEqual(null);
expect(g.errors).toEqual(null);
});
});
describe('disable() & enable()', () => {
it('should mark the control as disabled', () => {
const c = new FormControl(null);
expect(c.disabled).toBe(false);
expect(c.valid).toBe(true);
c.disable();
expect(c.disabled).toBe(true);
expect(c.valid).toBe(false);
c.enable();
expect(c.disabled).toBe(false);
expect(c.valid).toBe(true);
});
it('should set the control status as disabled', () => {
const c = new FormControl(null);
expect(c.status).toEqual('VALID');
c.disable();
expect(c.status).toEqual('DISABLED');
c.enable();
expect(c.status).toEqual('VALID');
});
it('should retain the original value when disabled', () => {
const c = new FormControl('some value');
expect(c.value).toEqual('some value');
c.disable();
expect(c.value).toEqual('some value');
c.enable();
expect(c.value).toEqual('some value');
});
it('should keep the disabled control in the group, but return false for contains()', () => {
const c = new FormControl('');
const g = new FormGroup({'one': c});
expect(g.get('one')).toBeDefined();
expect(g.contains('one')).toBe(true);
c.disable();
expect(g.get('one')).toBeDefined();
expect(g.contains('one')).toBe(false);
});
it('should mark the parent group disabled if all controls are disabled', () => {
const c = new FormControl();
const c2 = new FormControl();
const g = new FormGroup({'one': c, 'two': c2});
expect(g.enabled).toBe(true);
c.disable();
expect(g.enabled).toBe(true);
c2.disable();
expect(g.enabled).toBe(false);
c.enable();
expect(g.enabled).toBe(true);
});
it('should update the parent group value when child control status changes', () => {
const c = new FormControl('one');
const c2 = new FormControl('two');
const g = new FormGroup({'one': c, 'two': c2});
expect(g.value).toEqual({'one': 'one', 'two': 'two'});
c.disable();
expect(g.value).toEqual({'two': 'two'});
c2.disable();
expect(g.value).toEqual({'one': 'one', 'two': 'two'});
c.enable();
expect(g.value).toEqual({'one': 'one'});
});
it('should mark the parent array disabled if all controls are disabled', () => {
const c = new FormControl();
const c2 = new FormControl();
const a = new FormArray([c, c2]);
expect(a.enabled).toBe(true);
c.disable();
expect(a.enabled).toBe(true);
c2.disable();
expect(a.enabled).toBe(false);
c.enable();
expect(a.enabled).toBe(true);
});
it('should update the parent array value when child control status changes', () => {
const c = new FormControl('one');
const c2 = new FormControl('two');
const a = new FormArray([c, c2]);
expect(a.value).toEqual(['one', 'two']);
c.disable();
expect(a.value).toEqual(['two']);
c2.disable();
expect(a.value).toEqual(['one', 'two']);
c.enable();
expect(a.value).toEqual(['one']);
});
it('should ignore disabled controls in validation', () => {
const c = new FormControl(null, Validators.required);
const c2 = new FormControl(null);
const g = new FormGroup({one: c, two: c2});
expect(g.valid).toBe(false);
c.disable();
expect(g.valid).toBe(true);
c.enable();
expect(g.valid).toBe(false);
});
it('should ignore disabled controls when serializing value in a group', () => {
const c = new FormControl('one');
const c2 = new FormControl('two');
const g = new FormGroup({one: c, two: c2});
expect(g.value).toEqual({one: 'one', two: 'two'});
c.disable();
expect(g.value).toEqual({two: 'two'});
c.enable();
expect(g.value).toEqual({one: 'one', two: 'two'});
});
it('should ignore disabled controls when serializing value in an array', () => {
const c = new FormControl('one');
const c2 = new FormControl('two');
const a = new FormArray([c, c2]);
expect(a.value).toEqual(['one', 'two']);
c.disable();
expect(a.value).toEqual(['two']);
c.enable();
expect(a.value).toEqual(['one', 'two']);
});
it('should ignore disabled controls when determining dirtiness', () => {
const c = new FormControl('one');
const c2 = new FormControl('two');
const g = new FormGroup({one: c, two: c2});
c.markAsDirty();
expect(g.dirty).toBe(true);
c.disable();
expect(c.dirty).toBe(true);
expect(g.dirty).toBe(false);
c.enable();
expect(g.dirty).toBe(true);
});
it('should ignore disabled controls when determining touched state', () => {
const c = new FormControl('one');
const c2 = new FormControl('two');
const g = new FormGroup({one: c, two: c2});
c.markAsTouched();
expect(g.touched).toBe(true);
c.disable();
expect(c.touched).toBe(true);
expect(g.touched).toBe(false);
c.enable();
expect(g.touched).toBe(true);
});
it('should not run validators on disabled controls', () => {
const validator = jasmine.createSpy('validator');
const c = new FormControl('', validator);
expect(validator.calls.count()).toEqual(1);
c.disable();
expect(validator.calls.count()).toEqual(1);
c.setValue('value');
expect(validator.calls.count()).toEqual(1);
c.enable();
expect(validator.calls.count()).toEqual(2);
});
describe('disabled errors', () => {
it('should clear out the errors when disabled', () => {
const c = new FormControl('', Validators.required);
expect(c.errors).toEqual({required: true});
c.disable();
expect(c.errors).toEqual(null);
c.enable();
expect(c.errors).toEqual({required: true});
});
it('should clear out async errors when disabled', fakeAsync(() => {
const c = new FormControl('', null, asyncValidator('expected'));
tick();
expect(c.errors).toEqual({'async': true});
c.disable();
expect(c.errors).toEqual(null);
c.enable();
tick();
expect(c.errors).toEqual({'async': true});
}));
});
describe('disabled events', () => {
let logger: string[];
let c: FormControl;
let g: FormGroup;
beforeEach(() => {
logger = [];
c = new FormControl('', Validators.required);
g = new FormGroup({one: c});
});
it('should emit a statusChange event when disabled status changes', () => {
c.statusChanges.subscribe((status: string) => logger.push(status));
c.disable();
expect(logger).toEqual(['DISABLED']);
c.enable();
expect(logger).toEqual(['DISABLED', 'INVALID']);
});
it('should emit status change events in correct order', () => {
c.statusChanges.subscribe(() => logger.push('control'));
g.statusChanges.subscribe(() => logger.push('group'));
c.disable();
expect(logger).toEqual(['control', 'group']);
});
it('should throw when sync validator passed into async validator param', () => {
const fn = () => new FormControl('', syncValidator, syncValidator);
// test for the specific error since without the error check it would still throw an error
// but
// not a meaningful one
expect(fn).toThrowError(
`expected the following validator to return Promise or Observable: ${syncValidator}. If you are using FormBuilder; did you forget to brace your validators in an array?`);
});
});
});
});
}