angular-cn/packages/forms/test/form_group_spec.ts

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/**
* @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 {EventEmitter} from '@angular/core';
import {async, fakeAsync, tick} from '@angular/core/testing';
import {AsyncTestCompleter, beforeEach, describe, inject, it} from '@angular/core/testing/src/testing_internal';
import {AbstractControl, FormArray, FormControl, FormGroup, Validators} from '@angular/forms';
export function main() {
function asyncValidator(expected: string, timeouts = {}) {
return (c: AbstractControl) => {
let resolve: (result: any) => void = undefined !;
const promise = new Promise(res => { resolve = res; });
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const t = (timeouts as any)[c.value] != null ? (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;
}
describe('FormGroup', () => {
describe('value', () => {
it('should be the reduced value of the child controls', () => {
const g = new FormGroup({'one': new FormControl('111'), 'two': new FormControl('222')});
expect(g.value).toEqual({'one': '111', 'two': '222'});
});
it('should be empty when there are no child controls', () => {
const g = new FormGroup({});
expect(g.value).toEqual({});
});
it('should support nested groups', () => {
const g = new FormGroup({
'one': new FormControl('111'),
'nested': new FormGroup({'two': new FormControl('222')})
});
expect(g.value).toEqual({'one': '111', 'nested': {'two': '222'}});
(<FormControl>(g.get('nested.two'))).setValue('333');
expect(g.value).toEqual({'one': '111', 'nested': {'two': '333'}});
});
});
describe('getRawValue', () => {
let fg: FormGroup;
it('should work with nested form groups/arrays', () => {
fg = new FormGroup({
'c1': new FormControl('v1'),
'group': new FormGroup({'c2': new FormControl('v2'), 'c3': new FormControl('v3')}),
'array': new FormArray([new FormControl('v4'), new FormControl('v5')])
});
fg.get('group') !.get('c3') !.disable();
(fg.get('array') as FormArray).at(1).disable();
expect(fg.getRawValue())
.toEqual({'c1': 'v1', 'group': {'c2': 'v2', 'c3': 'v3'}, 'array': ['v4', 'v5']});
});
});
describe('adding and removing controls', () => {
it('should update value and validity when control is added', () => {
const g = new FormGroup({'one': new FormControl('1')});
expect(g.value).toEqual({'one': '1'});
expect(g.valid).toBe(true);
g.addControl('two', new FormControl('2', Validators.minLength(10)));
expect(g.value).toEqual({'one': '1', 'two': '2'});
expect(g.valid).toBe(false);
});
it('should update value and validity when control is removed', () => {
const g = new FormGroup(
{'one': new FormControl('1'), 'two': new FormControl('2', Validators.minLength(10))});
expect(g.value).toEqual({'one': '1', 'two': '2'});
expect(g.valid).toBe(false);
g.removeControl('two');
expect(g.value).toEqual({'one': '1'});
expect(g.valid).toBe(true);
});
});
describe('errors', () => {
it('should run the validator when the value changes', () => {
const simpleValidator = (c: FormGroup) =>
c.controls['one'].value != 'correct' ? {'broken': true} : null;
const c = new FormControl(null);
const g = new FormGroup({'one': c}, simpleValidator);
c.setValue('correct');
expect(g.valid).toEqual(true);
expect(g.errors).toEqual(null);
c.setValue('incorrect');
expect(g.valid).toEqual(false);
expect(g.errors).toEqual({'broken': true});
});
});
describe('dirty', () => {
let c: FormControl, g: FormGroup;
beforeEach(() => {
c = new FormControl('value');
g = new FormGroup({'one': c});
});
it('should be false after creating a control', () => { expect(g.dirty).toEqual(false); });
it('should be true after changing the value of the control', () => {
c.markAsDirty();
expect(g.dirty).toEqual(true);
});
});
describe('touched', () => {
let c: FormControl, g: FormGroup;
beforeEach(() => {
c = new FormControl('value');
g = new FormGroup({'one': c});
});
it('should be false after creating a control', () => { expect(g.touched).toEqual(false); });
it('should be true after control is marked as touched', () => {
c.markAsTouched();
expect(g.touched).toEqual(true);
});
});
describe('setValue', () => {
let c: FormControl, c2: FormControl, g: FormGroup;
beforeEach(() => {
c = new FormControl('');
c2 = new FormControl('');
g = new FormGroup({'one': c, 'two': c2});
});
it('should set its own value', () => {
g.setValue({'one': 'one', 'two': 'two'});
expect(g.value).toEqual({'one': 'one', 'two': 'two'});
});
it('should set child values', () => {
g.setValue({'one': 'one', 'two': 'two'});
expect(c.value).toEqual('one');
expect(c2.value).toEqual('two');
});
it('should set child control values if disabled', () => {
c2.disable();
g.setValue({'one': 'one', 'two': 'two'});
expect(c2.value).toEqual('two');
expect(g.value).toEqual({'one': 'one'});
expect(g.getRawValue()).toEqual({'one': 'one', 'two': 'two'});
});
it('should set group value if group is disabled', () => {
g.disable();
g.setValue({'one': 'one', 'two': 'two'});
expect(c.value).toEqual('one');
expect(c2.value).toEqual('two');
expect(g.value).toEqual({'one': 'one', 'two': 'two'});
});
it('should set parent values', () => {
const form = new FormGroup({'parent': g});
g.setValue({'one': 'one', 'two': 'two'});
expect(form.value).toEqual({'parent': {'one': 'one', 'two': 'two'}});
});
it('should not update the parent when explicitly specified', () => {
const form = new FormGroup({'parent': g});
g.setValue({'one': 'one', 'two': 'two'}, {onlySelf: true});
expect(form.value).toEqual({parent: {'one': '', 'two': ''}});
});
it('should throw if fields are missing from supplied value (subset)', () => {
expect(() => g.setValue({
'one': 'one'
})).toThrowError(new RegExp(`Must supply a value for form control with name: 'two'`));
});
it('should throw if a value is provided for a missing control (superset)', () => {
expect(() => g.setValue({'one': 'one', 'two': 'two', 'three': 'three'}))
.toThrowError(new RegExp(`Cannot find form control with name: three`));
});
it('should throw if a value is not provided for a disabled control', () => {
c2.disable();
expect(() => g.setValue({
'one': 'one'
})).toThrowError(new RegExp(`Must supply a value for form control with name: 'two'`));
});
it('should throw if no controls are set yet', () => {
const empty = new FormGroup({});
expect(() => empty.setValue({
'one': 'one'
})).toThrowError(new RegExp(`no form controls registered with this group`));
});
describe('setValue() events', () => {
let form: FormGroup;
let logger: any[];
beforeEach(() => {
form = new FormGroup({'parent': g});
logger = [];
});
it('should emit one valueChange event per control', () => {
form.valueChanges.subscribe(() => logger.push('form'));
g.valueChanges.subscribe(() => logger.push('group'));
c.valueChanges.subscribe(() => logger.push('control1'));
c2.valueChanges.subscribe(() => logger.push('control2'));
g.setValue({'one': 'one', 'two': 'two'});
expect(logger).toEqual(['control1', 'control2', 'group', 'form']);
});
it('should not fire an event when explicitly specified', fakeAsync(() => {
form.valueChanges.subscribe((value) => { throw 'Should not happen'; });
g.valueChanges.subscribe((value) => { throw 'Should not happen'; });
c.valueChanges.subscribe((value) => { throw 'Should not happen'; });
g.setValue({'one': 'one', 'two': 'two'}, {emitEvent: false});
tick();
}));
it('should emit one statusChange event per control', () => {
form.statusChanges.subscribe(() => logger.push('form'));
g.statusChanges.subscribe(() => logger.push('group'));
c.statusChanges.subscribe(() => logger.push('control1'));
c2.statusChanges.subscribe(() => logger.push('control2'));
g.setValue({'one': 'one', 'two': 'two'});
expect(logger).toEqual(['control1', 'control2', 'group', 'form']);
});
});
});
describe('patchValue', () => {
let c: FormControl, c2: FormControl, g: FormGroup;
beforeEach(() => {
c = new FormControl('');
c2 = new FormControl('');
g = new FormGroup({'one': c, 'two': c2});
});
it('should set its own value', () => {
g.patchValue({'one': 'one', 'two': 'two'});
expect(g.value).toEqual({'one': 'one', 'two': 'two'});
});
it('should set child values', () => {
g.patchValue({'one': 'one', 'two': 'two'});
expect(c.value).toEqual('one');
expect(c2.value).toEqual('two');
});
it('should patch disabled control values', () => {
c2.disable();
g.patchValue({'one': 'one', 'two': 'two'});
expect(c2.value).toEqual('two');
expect(g.value).toEqual({'one': 'one'});
expect(g.getRawValue()).toEqual({'one': 'one', 'two': 'two'});
});
it('should patch disabled control groups', () => {
g.disable();
g.patchValue({'one': 'one', 'two': 'two'});
expect(c.value).toEqual('one');
expect(c2.value).toEqual('two');
expect(g.value).toEqual({'one': 'one', 'two': 'two'});
});
it('should set parent values', () => {
const form = new FormGroup({'parent': g});
g.patchValue({'one': 'one', 'two': 'two'});
expect(form.value).toEqual({'parent': {'one': 'one', 'two': 'two'}});
});
it('should not update the parent when explicitly specified', () => {
const form = new FormGroup({'parent': g});
g.patchValue({'one': 'one', 'two': 'two'}, {onlySelf: true});
expect(form.value).toEqual({parent: {'one': '', 'two': ''}});
});
it('should ignore fields that are missing from supplied value (subset)', () => {
g.patchValue({'one': 'one'});
expect(g.value).toEqual({'one': 'one', 'two': ''});
});
it('should not ignore fields that are null', () => {
g.patchValue({'one': null});
expect(g.value).toEqual({'one': null, 'two': ''});
});
it('should ignore any value provided for a missing control (superset)', () => {
g.patchValue({'three': 'three'});
expect(g.value).toEqual({'one': '', 'two': ''});
});
describe('patchValue() events', () => {
let form: FormGroup;
let logger: any[];
beforeEach(() => {
form = new FormGroup({'parent': g});
logger = [];
});
it('should emit one valueChange event per control', () => {
form.valueChanges.subscribe(() => logger.push('form'));
g.valueChanges.subscribe(() => logger.push('group'));
c.valueChanges.subscribe(() => logger.push('control1'));
c2.valueChanges.subscribe(() => logger.push('control2'));
g.patchValue({'one': 'one', 'two': 'two'});
expect(logger).toEqual(['control1', 'control2', 'group', 'form']);
});
it('should not emit valueChange events for skipped controls', () => {
form.valueChanges.subscribe(() => logger.push('form'));
g.valueChanges.subscribe(() => logger.push('group'));
c.valueChanges.subscribe(() => logger.push('control1'));
c2.valueChanges.subscribe(() => logger.push('control2'));
g.patchValue({'one': 'one'});
expect(logger).toEqual(['control1', 'group', 'form']);
});
it('should not fire an event when explicitly specified', fakeAsync(() => {
form.valueChanges.subscribe((value) => { throw 'Should not happen'; });
g.valueChanges.subscribe((value) => { throw 'Should not happen'; });
c.valueChanges.subscribe((value) => { throw 'Should not happen'; });
g.patchValue({'one': 'one', 'two': 'two'}, {emitEvent: false});
tick();
}));
it('should emit one statusChange event per control', () => {
form.statusChanges.subscribe(() => logger.push('form'));
g.statusChanges.subscribe(() => logger.push('group'));
c.statusChanges.subscribe(() => logger.push('control1'));
c2.statusChanges.subscribe(() => logger.push('control2'));
g.patchValue({'one': 'one', 'two': 'two'});
expect(logger).toEqual(['control1', 'control2', 'group', 'form']);
});
});
});
describe('reset()', () => {
let c: FormControl, c2: FormControl, g: FormGroup;
beforeEach(() => {
c = new FormControl('initial value');
c2 = new FormControl('');
g = new FormGroup({'one': c, 'two': c2});
});
it('should set its own value if value passed', () => {
g.setValue({'one': 'new value', 'two': 'new value'});
g.reset({'one': 'initial value', 'two': ''});
expect(g.value).toEqual({'one': 'initial value', 'two': ''});
});
it('should set its own value if boxed value passed', () => {
g.setValue({'one': 'new value', 'two': 'new value'});
g.reset({'one': {value: 'initial value', disabled: false}, 'two': ''});
expect(g.value).toEqual({'one': 'initial value', 'two': ''});
});
it('should clear its own value if no value passed', () => {
g.setValue({'one': 'new value', 'two': 'new value'});
g.reset();
expect(g.value).toEqual({'one': null, 'two': null});
});
it('should set the value of each of its child controls if value passed', () => {
g.setValue({'one': 'new value', 'two': 'new value'});
g.reset({'one': 'initial value', 'two': ''});
expect(c.value).toBe('initial value');
expect(c2.value).toBe('');
});
it('should clear the value of each of its child controls if no value passed', () => {
g.setValue({'one': 'new value', 'two': 'new value'});
g.reset();
expect(c.value).toBe(null);
expect(c2.value).toBe(null);
});
it('should set the value of its parent if value passed', () => {
const form = new FormGroup({'g': g});
g.setValue({'one': 'new value', 'two': 'new value'});
g.reset({'one': 'initial value', 'two': ''});
expect(form.value).toEqual({'g': {'one': 'initial value', 'two': ''}});
});
it('should clear the value of its parent if no value passed', () => {
const form = new FormGroup({'g': g});
g.setValue({'one': 'new value', 'two': 'new value'});
g.reset();
expect(form.value).toEqual({'g': {'one': null, 'two': null}});
});
it('should not update the parent when explicitly specified', () => {
const form = new FormGroup({'g': g});
g.reset({'one': 'new value', 'two': 'new value'}, {onlySelf: true});
expect(form.value).toEqual({g: {'one': 'initial value', 'two': ''}});
});
it('should mark itself as pristine', () => {
g.markAsDirty();
expect(g.pristine).toBe(false);
g.reset();
expect(g.pristine).toBe(true);
});
it('should mark all child controls as pristine', () => {
c.markAsDirty();
c2.markAsDirty();
expect(c.pristine).toBe(false);
expect(c2.pristine).toBe(false);
g.reset();
expect(c.pristine).toBe(true);
expect(c2.pristine).toBe(true);
});
it('should mark the parent as pristine if all siblings pristine', () => {
const c3 = new FormControl('');
const form = new FormGroup({'g': g, 'c3': c3});
g.markAsDirty();
expect(form.pristine).toBe(false);
g.reset();
expect(form.pristine).toBe(true);
});
it('should not mark the parent pristine if any dirty siblings', () => {
const c3 = new FormControl('');
const form = new FormGroup({'g': g, 'c3': c3});
g.markAsDirty();
c3.markAsDirty();
expect(form.pristine).toBe(false);
g.reset();
expect(form.pristine).toBe(false);
});
it('should mark itself as untouched', () => {
g.markAsTouched();
expect(g.untouched).toBe(false);
g.reset();
expect(g.untouched).toBe(true);
});
it('should mark all child controls as untouched', () => {
c.markAsTouched();
c2.markAsTouched();
expect(c.untouched).toBe(false);
expect(c2.untouched).toBe(false);
g.reset();
expect(c.untouched).toBe(true);
expect(c2.untouched).toBe(true);
});
it('should mark the parent untouched if all siblings untouched', () => {
const c3 = new FormControl('');
const form = new FormGroup({'g': g, 'c3': c3});
g.markAsTouched();
expect(form.untouched).toBe(false);
g.reset();
expect(form.untouched).toBe(true);
});
it('should not mark the parent untouched if any touched siblings', () => {
const c3 = new FormControl('');
const form = new FormGroup({'g': g, 'c3': c3});
g.markAsTouched();
c3.markAsTouched();
expect(form.untouched).toBe(false);
g.reset();
expect(form.untouched).toBe(false);
});
it('should retain previous disabled state', () => {
g.disable();
g.reset();
expect(g.disabled).toBe(true);
});
it('should set child disabled state if boxed value passed', () => {
g.disable();
g.reset({'one': {value: '', disabled: false}, 'two': ''});
expect(c.disabled).toBe(false);
expect(g.disabled).toBe(false);
});
describe('reset() events', () => {
let form: FormGroup, c3: FormControl, logger: any[];
beforeEach(() => {
c3 = new FormControl('');
form = new FormGroup({'g': g, 'c3': c3});
logger = [];
});
it('should emit one valueChange event per reset control', () => {
form.valueChanges.subscribe(() => logger.push('form'));
g.valueChanges.subscribe(() => logger.push('group'));
c.valueChanges.subscribe(() => logger.push('control1'));
c2.valueChanges.subscribe(() => logger.push('control2'));
c3.valueChanges.subscribe(() => logger.push('control3'));
g.reset();
expect(logger).toEqual(['control1', 'control2', 'group', 'form']);
});
it('should not fire an event when explicitly specified', fakeAsync(() => {
form.valueChanges.subscribe((value) => { throw 'Should not happen'; });
g.valueChanges.subscribe((value) => { throw 'Should not happen'; });
c.valueChanges.subscribe((value) => { throw 'Should not happen'; });
g.reset({}, {emitEvent: false});
tick();
}));
it('should emit one statusChange event per reset control', () => {
form.statusChanges.subscribe(() => logger.push('form'));
g.statusChanges.subscribe(() => logger.push('group'));
c.statusChanges.subscribe(() => logger.push('control1'));
c2.statusChanges.subscribe(() => logger.push('control2'));
c3.statusChanges.subscribe(() => logger.push('control3'));
g.reset();
expect(logger).toEqual(['control1', 'control2', 'group', 'form']);
});
it('should emit one statusChange event per reset control', () => {
form.statusChanges.subscribe(() => logger.push('form'));
g.statusChanges.subscribe(() => logger.push('group'));
c.statusChanges.subscribe(() => logger.push('control1'));
c2.statusChanges.subscribe(() => logger.push('control2'));
c3.statusChanges.subscribe(() => logger.push('control3'));
g.reset({'one': {value: '', disabled: true}});
expect(logger).toEqual(['control1', 'control2', 'group', 'form']);
});
});
});
describe('contains', () => {
let group: FormGroup;
beforeEach(() => {
group = new FormGroup({
'required': new FormControl('requiredValue'),
'optional': new FormControl({value: 'disabled value', disabled: true})
});
});
it('should return false when the component is disabled',
() => { expect(group.contains('optional')).toEqual(false); });
it('should return false when there is no component with the given name',
() => { expect(group.contains('something else')).toEqual(false); });
it('should return true when the component is enabled', () => {
expect(group.contains('required')).toEqual(true);
group.enable('optional');
expect(group.contains('optional')).toEqual(true);
});
it('should support controls with dots in their name', () => {
expect(group.contains('some.name')).toBe(false);
group.addControl('some.name', new FormControl());
expect(group.contains('some.name')).toBe(true);
});
});
describe('statusChanges', () => {
let control: FormControl;
let group: FormGroup;
beforeEach(async(() => {
control = new FormControl('', asyncValidatorReturningObservable);
group = new FormGroup({'one': control});
}));
// TODO(kara): update these tests to use fake Async
it('should fire a statusChange if child has async validation change',
inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
const loggedValues: string[] = [];
group.statusChanges.subscribe({
next: (status: string) => {
loggedValues.push(status);
if (loggedValues.length === 2) {
expect(loggedValues).toEqual(['PENDING', 'INVALID']);
}
async.done();
}
});
control.setValue('');
}));
});
describe('getError', () => {
it('should return the error when it is present', () => {
const c = new FormControl('', Validators.required);
const g = new FormGroup({'one': c});
expect(c.getError('required')).toEqual(true);
expect(g.getError('required', ['one'])).toEqual(true);
});
it('should return null otherwise', () => {
const c = new FormControl('not empty', Validators.required);
const g = new FormGroup({'one': c});
expect(c.getError('invalid')).toEqual(null);
expect(g.getError('required', ['one'])).toEqual(null);
expect(g.getError('required', ['invalid'])).toEqual(null);
});
});
describe('asyncValidator', () => {
it('should run the async validator', fakeAsync(() => {
const c = new FormControl('value');
const g = new FormGroup({'one': c}, null !, asyncValidator('expected'));
expect(g.pending).toEqual(true);
tick(1);
expect(g.errors).toEqual({'async': true});
expect(g.pending).toEqual(false);
}));
it('should set the parent group\'s status to pending', fakeAsync(() => {
const c = new FormControl('value', null !, asyncValidator('expected'));
const g = new FormGroup({'one': c});
expect(g.pending).toEqual(true);
tick(1);
expect(g.pending).toEqual(false);
}));
it('should run the parent group\'s async validator when children are pending',
fakeAsync(() => {
const c = new FormControl('value', null !, asyncValidator('expected'));
const g = new FormGroup({'one': c}, null !, asyncValidator('expected'));
tick(1);
expect(g.errors).toEqual({'async': true});
expect(g.get('one') !.errors).toEqual({'async': true});
}));
});
describe('disable() & enable()', () => {
it('should mark the group as disabled', () => {
const g = new FormGroup({'one': new FormControl(null)});
expect(g.disabled).toBe(false);
expect(g.valid).toBe(true);
g.disable();
expect(g.disabled).toBe(true);
expect(g.valid).toBe(false);
g.enable();
expect(g.disabled).toBe(false);
expect(g.valid).toBe(true);
});
it('should set the group status as disabled', () => {
const g = new FormGroup({'one': new FormControl(null)});
expect(g.status).toEqual('VALID');
g.disable();
expect(g.status).toEqual('DISABLED');
g.enable();
expect(g.status).toBe('VALID');
});
it('should mark children of the group as disabled', () => {
const c1 = new FormControl(null);
const c2 = new FormControl(null);
const g = new FormGroup({'one': c1, 'two': c2});
expect(c1.disabled).toBe(false);
expect(c2.disabled).toBe(false);
g.disable();
expect(c1.disabled).toBe(true);
expect(c2.disabled).toBe(true);
g.enable();
expect(c1.disabled).toBe(false);
expect(c2.disabled).toBe(false);
});
it('should ignore disabled controls in validation', () => {
const g = new FormGroup({
nested: new FormGroup({one: new FormControl(null, Validators.required)}),
two: new FormControl('two')
});
expect(g.valid).toBe(false);
g.get('nested') !.disable();
expect(g.valid).toBe(true);
g.get('nested') !.enable();
expect(g.valid).toBe(false);
});
it('should ignore disabled controls when serializing value', () => {
const g = new FormGroup(
{nested: new FormGroup({one: new FormControl('one')}), two: new FormControl('two')});
expect(g.value).toEqual({'nested': {'one': 'one'}, 'two': 'two'});
g.get('nested') !.disable();
expect(g.value).toEqual({'two': 'two'});
g.get('nested') !.enable();
expect(g.value).toEqual({'nested': {'one': 'one'}, 'two': 'two'});
});
it('should update its value when disabled with disabled children', () => {
const g = new FormGroup(
{nested: new FormGroup({one: new FormControl('one'), two: new FormControl('two')})});
g.get('nested.two') !.disable();
expect(g.value).toEqual({nested: {one: 'one'}});
g.get('nested') !.disable();
expect(g.value).toEqual({nested: {one: 'one', two: 'two'}});
g.get('nested') !.enable();
expect(g.value).toEqual({nested: {one: 'one', two: 'two'}});
});
it('should update its value when enabled with disabled children', () => {
const g = new FormGroup(
{nested: new FormGroup({one: new FormControl('one'), two: new FormControl('two')})});
g.get('nested.two') !.disable();
expect(g.value).toEqual({nested: {one: 'one'}});
g.get('nested') !.enable();
expect(g.value).toEqual({nested: {one: 'one', two: 'two'}});
});
it('should ignore disabled controls when determining dirtiness', () => {
const g = new FormGroup(
{nested: new FormGroup({one: new FormControl('one')}), two: new FormControl('two')});
g.get('nested.one') !.markAsDirty();
expect(g.dirty).toBe(true);
g.get('nested') !.disable();
expect(g.get('nested') !.dirty).toBe(true);
expect(g.dirty).toEqual(false);
g.get('nested') !.enable();
expect(g.dirty).toEqual(true);
});
it('should ignore disabled controls when determining touched state', () => {
const g = new FormGroup(
{nested: new FormGroup({one: new FormControl('one')}), two: new FormControl('two')});
g.get('nested.one') !.markAsTouched();
expect(g.touched).toBe(true);
g.get('nested') !.disable();
expect(g.get('nested') !.touched).toBe(true);
expect(g.touched).toEqual(false);
g.get('nested') !.enable();
expect(g.touched).toEqual(true);
});
it('should keep empty, disabled groups disabled when updating validity', () => {
const group = new FormGroup({});
expect(group.status).toEqual('VALID');
group.disable();
expect(group.status).toEqual('DISABLED');
group.updateValueAndValidity();
expect(group.status).toEqual('DISABLED');
group.addControl('one', new FormControl({value: '', disabled: true}));
expect(group.status).toEqual('DISABLED');
group.addControl('two', new FormControl());
expect(group.status).toEqual('VALID');
});
it('should re-enable empty, disabled groups', () => {
const group = new FormGroup({});
group.disable();
expect(group.status).toEqual('DISABLED');
group.enable();
expect(group.status).toEqual('VALID');
});
it('should not run validators on disabled controls', () => {
const validator = jasmine.createSpy('validator');
const g = new FormGroup({'one': new FormControl()}, validator);
expect(validator.calls.count()).toEqual(1);
g.disable();
expect(validator.calls.count()).toEqual(1);
g.setValue({one: 'value'});
expect(validator.calls.count()).toEqual(1);
g.enable();
expect(validator.calls.count()).toEqual(2);
});
describe('disabled errors', () => {
it('should clear out group errors when disabled', () => {
const g = new FormGroup({'one': new FormControl()}, () => ({'expected': true}));
expect(g.errors).toEqual({'expected': true});
g.disable();
expect(g.errors).toEqual(null);
g.enable();
expect(g.errors).toEqual({'expected': true});
});
it('should re-populate group errors when enabled from a child', () => {
const g = new FormGroup({'one': new FormControl()}, () => ({'expected': true}));
g.disable();
expect(g.errors).toEqual(null);
g.addControl('two', new FormControl());
expect(g.errors).toEqual({'expected': true});
});
it('should clear out async group errors when disabled', fakeAsync(() => {
const g =
new FormGroup({'one': new FormControl()}, null !, asyncValidator('expected'));
tick();
expect(g.errors).toEqual({'async': true});
g.disable();
expect(g.errors).toEqual(null);
g.enable();
tick();
expect(g.errors).toEqual({'async': true});
}));
it('should re-populate async group errors when enabled from a child', fakeAsync(() => {
const g =
new FormGroup({'one': new FormControl()}, null !, asyncValidator('expected'));
tick();
expect(g.errors).toEqual({'async': true});
g.disable();
expect(g.errors).toEqual(null);
g.addControl('two', new FormControl());
tick();
expect(g.errors).toEqual({'async': true});
}));
});
describe('disabled events', () => {
let logger: string[];
let c: FormControl;
let g: FormGroup;
let form: FormGroup;
beforeEach(() => {
logger = [];
c = new FormControl('', Validators.required);
g = new FormGroup({one: c});
form = new FormGroup({g: g});
});
it('should emit value change events in the right order', () => {
c.valueChanges.subscribe(() => logger.push('control'));
g.valueChanges.subscribe(() => logger.push('group'));
form.valueChanges.subscribe(() => logger.push('form'));
g.disable();
expect(logger).toEqual(['control', 'group', 'form']);
});
it('should emit status change events in the right order', () => {
c.statusChanges.subscribe(() => logger.push('control'));
g.statusChanges.subscribe(() => logger.push('group'));
form.statusChanges.subscribe(() => logger.push('form'));
g.disable();
expect(logger).toEqual(['control', 'group', 'form']);
});
});
});
describe('updateTreeValidity()', () => {
let c: FormControl, c2: FormControl, c3: FormControl;
let nested: FormGroup, form: FormGroup;
let logger: string[];
beforeEach(() => {
c = new FormControl('one');
c2 = new FormControl('two');
c3 = new FormControl('three');
nested = new FormGroup({one: c, two: c2});
form = new FormGroup({nested: nested, three: c3});
logger = [];
c.statusChanges.subscribe(() => logger.push('one'));
c2.statusChanges.subscribe(() => logger.push('two'));
c3.statusChanges.subscribe(() => logger.push('three'));
nested.statusChanges.subscribe(() => logger.push('nested'));
form.statusChanges.subscribe(() => logger.push('form'));
});
it('should update tree validity', () => {
form._updateTreeValidity();
expect(logger).toEqual(['one', 'two', 'nested', 'three', 'form']);
});
it('should not emit events when turned off', () => {
form._updateTreeValidity({emitEvent: false});
expect(logger).toEqual([]);
});
});
describe('setControl()', () => {
let c: FormControl;
let g: FormGroup;
beforeEach(() => {
c = new FormControl('one');
g = new FormGroup({one: c});
});
it('should replace existing control with new control', () => {
const c2 = new FormControl('new!', Validators.minLength(10));
g.setControl('one', c2);
expect(g.controls['one']).toEqual(c2);
expect(g.value).toEqual({one: 'new!'});
expect(g.valid).toBe(false);
});
it('should add control if control did not exist before', () => {
const c2 = new FormControl('new!', Validators.minLength(10));
g.setControl('two', c2);
expect(g.controls['two']).toEqual(c2);
expect(g.value).toEqual({one: 'one', two: 'new!'});
expect(g.valid).toBe(false);
});
it('should remove control if new control is null', () => {
g.setControl('one', null !);
expect(g.controls['one']).not.toBeDefined();
expect(g.value).toEqual({});
});
it('should only emit value change event once', () => {
const logger: string[] = [];
const c2 = new FormControl('new!');
g.valueChanges.subscribe(() => logger.push('change!'));
g.setControl('one', c2);
expect(logger).toEqual(['change!']);
});
});
});
}