angular-docs-cn/packages/forms/test/reactive_integration_spec.ts

/**
 * @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 {Component, Directive, Input, Type, forwardRef} from '@angular/core';
import {ComponentFixture, TestBed, fakeAsync, tick} from '@angular/core/testing';
import {AbstractControl, AsyncValidator, AsyncValidatorFn, COMPOSITION_BUFFER_MODE, FormArray, FormControl, FormGroup, FormGroupDirective, FormsModule, NG_ASYNC_VALIDATORS, NG_VALIDATORS, ReactiveFormsModule, Validators} from '@angular/forms';
import {By} from '@angular/platform-browser/src/dom/debug/by';
import {getDOM} from '@angular/platform-browser/src/dom/dom_adapter';
import {dispatchEvent} from '@angular/platform-browser/testing/src/browser_util';
import {timer} from 'rxjs/observable/timer';
import {_do} from 'rxjs/operator/do';
import {MyInput, MyInputForm} from './value_accessor_integration_spec';

export function main() {
  describe('reactive forms integration tests', () => {

    function initTest<T>(component: Type<T>, ...directives: Type<any>[]): ComponentFixture<T> {
      TestBed.configureTestingModule(
          {declarations: [component, ...directives], imports: [FormsModule, ReactiveFormsModule]});
      return TestBed.createComponent(component);
    }

    describe('basic functionality', () => {
      it('should work with single controls', () => {
        const fixture = initTest(FormControlComp);
        const control = new FormControl('old value');
        fixture.componentInstance.control = control;
        fixture.detectChanges();

        // model -> view
        const input = fixture.debugElement.query(By.css('input'));
        expect(input.nativeElement.value).toEqual('old value');

        input.nativeElement.value = 'updated value';
        dispatchEvent(input.nativeElement, 'input');

        // view -> model
        expect(control.value).toEqual('updated value');
      });

      it('should work with formGroups (model -> view)', () => {
        const fixture = initTest(FormGroupComp);
        fixture.componentInstance.form = new FormGroup({'login': new FormControl('loginValue')});
        fixture.detectChanges();

        const input = fixture.debugElement.query(By.css('input'));
        expect(input.nativeElement.value).toEqual('loginValue');
      });

      it('should add novalidate by default to form', () => {
        const fixture = initTest(FormGroupComp);
        fixture.componentInstance.form = new FormGroup({'login': new FormControl('loginValue')});
        fixture.detectChanges();

        const form = fixture.debugElement.query(By.css('form'));
        expect(form.nativeElement.getAttribute('novalidate')).toEqual('');
      });

      it('work with formGroups (view -> model)', () => {
        const fixture = initTest(FormGroupComp);
        const form = new FormGroup({'login': new FormControl('oldValue')});
        fixture.componentInstance.form = form;
        fixture.detectChanges();

        const input = fixture.debugElement.query(By.css('input'));
        input.nativeElement.value = 'updatedValue';
        dispatchEvent(input.nativeElement, 'input');

        expect(form.value).toEqual({'login': 'updatedValue'});
      });

    });

    describe('re-bound form groups', () => {

      it('should update DOM elements initially', () => {
        const fixture = initTest(FormGroupComp);
        fixture.componentInstance.form = new FormGroup({'login': new FormControl('oldValue')});
        fixture.detectChanges();

        fixture.componentInstance.form = new FormGroup({'login': new FormControl('newValue')});
        fixture.detectChanges();

        const input = fixture.debugElement.query(By.css('input'));
        expect(input.nativeElement.value).toEqual('newValue');
      });

      it('should update model when UI changes', () => {
        const fixture = initTest(FormGroupComp);
        fixture.componentInstance.form = new FormGroup({'login': new FormControl('oldValue')});
        fixture.detectChanges();

        const newForm = new FormGroup({'login': new FormControl('newValue')});
        fixture.componentInstance.form = newForm;
        fixture.detectChanges();

        const input = fixture.debugElement.query(By.css('input'));
        input.nativeElement.value = 'Nancy';
        dispatchEvent(input.nativeElement, 'input');
        fixture.detectChanges();

        expect(newForm.value).toEqual({login: 'Nancy'});

        newForm.setValue({login: 'Carson'});
        fixture.detectChanges();
        expect(input.nativeElement.value).toEqual('Carson');
      });

      it('should update nested form group model when UI changes', () => {
        const fixture = initTest(NestedFormGroupComp);
        fixture.componentInstance.form = new FormGroup(
            {'signin': new FormGroup({'login': new FormControl(), 'password': new FormControl()})});
        fixture.detectChanges();

        const newForm = new FormGroup({
          'signin': new FormGroup(
              {'login': new FormControl('Nancy'), 'password': new FormControl('secret')})
        });
        fixture.componentInstance.form = newForm;
        fixture.detectChanges();

        const inputs = fixture.debugElement.queryAll(By.css('input'));
        expect(inputs[0].nativeElement.value).toEqual('Nancy');
        expect(inputs[1].nativeElement.value).toEqual('secret');

        inputs[0].nativeElement.value = 'Carson';
        dispatchEvent(inputs[0].nativeElement, 'input');
        fixture.detectChanges();

        expect(newForm.value).toEqual({signin: {login: 'Carson', password: 'secret'}});

        newForm.setValue({signin: {login: 'Bess', password: 'otherpass'}});
        fixture.detectChanges();
        expect(inputs[0].nativeElement.value).toEqual('Bess');
      });

      it('should pick up dir validators from form controls', () => {
        const fixture = initTest(LoginIsEmptyWrapper, LoginIsEmptyValidator);
        const form = new FormGroup({
          'login': new FormControl(''),
          'min': new FormControl(''),
          'max': new FormControl(''),
          'pattern': new FormControl('')
        });
        fixture.componentInstance.form = form;
        fixture.detectChanges();
        expect(form.get('login') !.errors).toEqual({required: true});

        const newForm = new FormGroup({
          'login': new FormControl(''),
          'min': new FormControl(''),
          'max': new FormControl(''),
          'pattern': new FormControl('')
        });
        fixture.componentInstance.form = newForm;
        fixture.detectChanges();

        expect(newForm.get('login') !.errors).toEqual({required: true});
      });

      it('should pick up dir validators from nested form groups', () => {
        const fixture = initTest(NestedFormGroupComp, LoginIsEmptyValidator);
        const form = new FormGroup({
          'signin':
              new FormGroup({'login': new FormControl(''), 'password': new FormControl('')})
        });
        fixture.componentInstance.form = form;
        fixture.detectChanges();
        expect(form.get('signin') !.valid).toBe(false);

        const newForm = new FormGroup({
          'signin':
              new FormGroup({'login': new FormControl(''), 'password': new FormControl('')})
        });
        fixture.componentInstance.form = newForm;
        fixture.detectChanges();

        expect(form.get('signin') !.valid).toBe(false);
      });

      it('should strip named controls that are not found', () => {
        const fixture = initTest(NestedFormGroupComp, LoginIsEmptyValidator);
        const form = new FormGroup({
          'signin':
              new FormGroup({'login': new FormControl(''), 'password': new FormControl('')})
        });
        fixture.componentInstance.form = form;
        fixture.detectChanges();

        form.addControl('email', new FormControl('email'));
        fixture.detectChanges();

        let emailInput = fixture.debugElement.query(By.css('[formControlName="email"]'));
        expect(emailInput.nativeElement.value).toEqual('email');

        const newForm = new FormGroup({
          'signin':
              new FormGroup({'login': new FormControl(''), 'password': new FormControl('')})
        });
        fixture.componentInstance.form = newForm;
        fixture.detectChanges();

        emailInput = fixture.debugElement.query(By.css('[formControlName="email"]'));
        expect(emailInput).toBe(null);
      });

      it('should strip array controls that are not found', () => {
        const fixture = initTest(FormArrayComp);
        const cityArray = new FormArray([new FormControl('SF'), new FormControl('NY')]);
        const form = new FormGroup({cities: cityArray});
        fixture.componentInstance.form = form;
        fixture.componentInstance.cityArray = cityArray;
        fixture.detectChanges();

        let inputs = fixture.debugElement.queryAll(By.css('input'));
        expect(inputs[2]).not.toBeDefined();
        cityArray.push(new FormControl('LA'));
        fixture.detectChanges();

        inputs = fixture.debugElement.queryAll(By.css('input'));
        expect(inputs[2]).toBeDefined();

        const newArr = new FormArray([new FormControl('SF'), new FormControl('NY')]);
        const newForm = new FormGroup({cities: newArr});
        fixture.componentInstance.form = newForm;
        fixture.componentInstance.cityArray = newArr;
        fixture.detectChanges();

        inputs = fixture.debugElement.queryAll(By.css('input'));
        expect(inputs[2]).not.toBeDefined();
      });

      describe('nested control rebinding', () => {

        it('should attach dir to control when leaf control changes', () => {
          const form = new FormGroup({'login': new FormControl('oldValue')});
          const fixture = initTest(FormGroupComp);
          fixture.componentInstance.form = form;
          fixture.detectChanges();

          form.removeControl('login');
          form.addControl('login', new FormControl('newValue'));
          fixture.detectChanges();

          const input = fixture.debugElement.query(By.css('input'));
          expect(input.nativeElement.value).toEqual('newValue');

          input.nativeElement.value = 'user input';
          dispatchEvent(input.nativeElement, 'input');
          fixture.detectChanges();

          expect(form.value).toEqual({login: 'user input'});

          form.setValue({login: 'Carson'});
          fixture.detectChanges();
          expect(input.nativeElement.value).toEqual('Carson');
        });

        it('should attach dirs to all child controls when group control changes', () => {
          const fixture = initTest(NestedFormGroupComp, LoginIsEmptyValidator);
          const form = new FormGroup({
            signin: new FormGroup(
                {login: new FormControl('oldLogin'), password: new FormControl('oldPassword')})
          });
          fixture.componentInstance.form = form;
          fixture.detectChanges();

          form.removeControl('signin');
          form.addControl(
              'signin',
              new FormGroup(
                  {login: new FormControl('newLogin'), password: new FormControl('newPassword')}));
          fixture.detectChanges();

          const inputs = fixture.debugElement.queryAll(By.css('input'));
          expect(inputs[0].nativeElement.value).toEqual('newLogin');
          expect(inputs[1].nativeElement.value).toEqual('newPassword');

          inputs[0].nativeElement.value = 'user input';
          dispatchEvent(inputs[0].nativeElement, 'input');
          fixture.detectChanges();

          expect(form.value).toEqual({signin: {login: 'user input', password: 'newPassword'}});

          form.setValue({signin: {login: 'Carson', password: 'Drew'}});
          fixture.detectChanges();
          expect(inputs[0].nativeElement.value).toEqual('Carson');
          expect(inputs[1].nativeElement.value).toEqual('Drew');
        });

        it('should attach dirs to all present child controls when array control changes', () => {
          const fixture = initTest(FormArrayComp);
          const cityArray = new FormArray([new FormControl('SF'), new FormControl('NY')]);
          const form = new FormGroup({cities: cityArray});
          fixture.componentInstance.form = form;
          fixture.componentInstance.cityArray = cityArray;
          fixture.detectChanges();

          form.removeControl('cities');
          form.addControl('cities', new FormArray([new FormControl('LA')]));
          fixture.detectChanges();

          const input = fixture.debugElement.query(By.css('input'));
          expect(input.nativeElement.value).toEqual('LA');

          input.nativeElement.value = 'MTV';
          dispatchEvent(input.nativeElement, 'input');
          fixture.detectChanges();

          expect(form.value).toEqual({cities: ['MTV']});

          form.setValue({cities: ['LA']});
          fixture.detectChanges();
          expect(input.nativeElement.value).toEqual('LA');
        });

      });

    });

    describe('form arrays', () => {
      it('should support form arrays', () => {
        const fixture = initTest(FormArrayComp);
        const cityArray = new FormArray([new FormControl('SF'), new FormControl('NY')]);
        const form = new FormGroup({cities: cityArray});
        fixture.componentInstance.form = form;
        fixture.componentInstance.cityArray = cityArray;
        fixture.detectChanges();

        const inputs = fixture.debugElement.queryAll(By.css('input'));

        // model -> view
        expect(inputs[0].nativeElement.value).toEqual('SF');
        expect(inputs[1].nativeElement.value).toEqual('NY');
        expect(form.value).toEqual({cities: ['SF', 'NY']});

        inputs[0].nativeElement.value = 'LA';
        dispatchEvent(inputs[0].nativeElement, 'input');
        fixture.detectChanges();

        //  view -> model
        expect(form.value).toEqual({cities: ['LA', 'NY']});
      });

      it('should support pushing new controls to form arrays', () => {
        const fixture = initTest(FormArrayComp);
        const cityArray = new FormArray([new FormControl('SF'), new FormControl('NY')]);
        const form = new FormGroup({cities: cityArray});
        fixture.componentInstance.form = form;
        fixture.componentInstance.cityArray = cityArray;
        fixture.detectChanges();

        cityArray.push(new FormControl('LA'));
        fixture.detectChanges();

        const inputs = fixture.debugElement.queryAll(By.css('input'));
        expect(inputs[2].nativeElement.value).toEqual('LA');
        expect(form.value).toEqual({cities: ['SF', 'NY', 'LA']});
      });

      it('should support form groups nested in form arrays', () => {
        const fixture = initTest(FormArrayNestedGroup);
        const cityArray = new FormArray([
          new FormGroup({town: new FormControl('SF'), state: new FormControl('CA')}),
          new FormGroup({town: new FormControl('NY'), state: new FormControl('NY')})
        ]);
        const form = new FormGroup({cities: cityArray});
        fixture.componentInstance.form = form;
        fixture.componentInstance.cityArray = cityArray;
        fixture.detectChanges();

        const inputs = fixture.debugElement.queryAll(By.css('input'));
        expect(inputs[0].nativeElement.value).toEqual('SF');
        expect(inputs[1].nativeElement.value).toEqual('CA');
        expect(inputs[2].nativeElement.value).toEqual('NY');
        expect(inputs[3].nativeElement.value).toEqual('NY');
        expect(form.value).toEqual({
          cities: [{town: 'SF', state: 'CA'}, {town: 'NY', state: 'NY'}]
        });

        inputs[0].nativeElement.value = 'LA';
        dispatchEvent(inputs[0].nativeElement, 'input');
        fixture.detectChanges();

        expect(form.value).toEqual({
          cities: [{town: 'LA', state: 'CA'}, {town: 'NY', state: 'NY'}]
        });
      });

    });

    describe('programmatic changes', () => {
      it('should update the value in the DOM when setValue() is called', () => {
        const fixture = initTest(FormGroupComp);
        const login = new FormControl('oldValue');
        const form = new FormGroup({'login': login});
        fixture.componentInstance.form = form;
        fixture.detectChanges();

        login.setValue('newValue');
        fixture.detectChanges();

        const input = fixture.debugElement.query(By.css('input'));
        expect(input.nativeElement.value).toEqual('newValue');
      });

      describe('disabled controls', () => {
        it('should add disabled attribute to an individual control when instantiated as disabled',
           () => {
             const fixture = initTest(FormControlComp);
             const control = new FormControl({value: 'some value', disabled: true});
             fixture.componentInstance.control = control;
             fixture.detectChanges();

             const input = fixture.debugElement.query(By.css('input'));
             expect(input.nativeElement.disabled).toBe(true);

             control.enable();
             fixture.detectChanges();
             expect(input.nativeElement.disabled).toBe(false);
           });

        it('should add disabled attribute to formControlName when instantiated as disabled', () => {
          const fixture = initTest(FormGroupComp);
          const control = new FormControl({value: 'some value', disabled: true});
          fixture.componentInstance.form = new FormGroup({login: control});
          fixture.componentInstance.control = control;
          fixture.detectChanges();

          const input = fixture.debugElement.query(By.css('input'));
          expect(input.nativeElement.disabled).toBe(true);

          control.enable();
          fixture.detectChanges();
          expect(input.nativeElement.disabled).toBe(false);
        });

        it('should add disabled attribute to an individual control when disable() is called',
           () => {
             const fixture = initTest(FormControlComp);
             const control = new FormControl('some value');
             fixture.componentInstance.control = control;
             fixture.detectChanges();

             control.disable();
             fixture.detectChanges();

             const input = fixture.debugElement.query(By.css('input'));
             expect(input.nativeElement.disabled).toBe(true);

             control.enable();
             fixture.detectChanges();
             expect(input.nativeElement.disabled).toBe(false);
           });

        it('should add disabled attribute to child controls when disable() is called on group',
           () => {
             const fixture = initTest(FormGroupComp);
             const form = new FormGroup({'login': new FormControl('login')});
             fixture.componentInstance.form = form;
             fixture.detectChanges();

             form.disable();
             fixture.detectChanges();

             const inputs = fixture.debugElement.queryAll(By.css('input'));
             expect(inputs[0].nativeElement.disabled).toBe(true);

             form.enable();
             fixture.detectChanges();
             expect(inputs[0].nativeElement.disabled).toBe(false);
           });


        it('should not add disabled attribute to custom controls when disable() is called', () => {
          const fixture = initTest(MyInputForm, MyInput);
          const control = new FormControl('some value');
          fixture.componentInstance.form = new FormGroup({login: control});
          fixture.detectChanges();

          control.disable();
          fixture.detectChanges();

          const input = fixture.debugElement.query(By.css('my-input'));
          expect(input.nativeElement.getAttribute('disabled')).toBe(null);
        });

      });

    });

    describe('user input', () => {

      it('should mark controls as touched after interacting with the DOM control', () => {
        const fixture = initTest(FormGroupComp);
        const login = new FormControl('oldValue');
        const form = new FormGroup({'login': login});
        fixture.componentInstance.form = form;
        fixture.detectChanges();

        const loginEl = fixture.debugElement.query(By.css('input'));
        expect(login.touched).toBe(false);

        dispatchEvent(loginEl.nativeElement, 'blur');

        expect(login.touched).toBe(true);
      });

    });

    describe('submit and reset events', () => {
      it('should emit ngSubmit event with the original submit event on submit', () => {
        const fixture = initTest(FormGroupComp);
        fixture.componentInstance.form = new FormGroup({'login': new FormControl('loginValue')});
        fixture.componentInstance.event = null !;
        fixture.detectChanges();

        const formEl = fixture.debugElement.query(By.css('form')).nativeElement;
        dispatchEvent(formEl, 'submit');

        fixture.detectChanges();
        expect(fixture.componentInstance.event.type).toEqual('submit');
      });

      it('should mark formGroup as submitted on submit event', () => {
        const fixture = initTest(FormGroupComp);
        fixture.componentInstance.form = new FormGroup({'login': new FormControl('loginValue')});
        fixture.detectChanges();

        const formGroupDir = fixture.debugElement.children[0].injector.get(FormGroupDirective);
        expect(formGroupDir.submitted).toBe(false);

        const formEl = fixture.debugElement.query(By.css('form')).nativeElement;
        dispatchEvent(formEl, 'submit');

        fixture.detectChanges();
        expect(formGroupDir.submitted).toEqual(true);
      });

      it('should set value in UI when form resets to that value programmatically', () => {
        const fixture = initTest(FormGroupComp);
        const login = new FormControl('some value');
        const form = new FormGroup({'login': login});
        fixture.componentInstance.form = form;
        fixture.detectChanges();

        const loginEl = fixture.debugElement.query(By.css('input')).nativeElement;
        expect(loginEl.value).toBe('some value');

        form.reset({'login': 'reset value'});
        expect(loginEl.value).toBe('reset value');
      });

      it('should clear value in UI when form resets programmatically', () => {
        const fixture = initTest(FormGroupComp);
        const login = new FormControl('some value');
        const form = new FormGroup({'login': login});
        fixture.componentInstance.form = form;
        fixture.detectChanges();

        const loginEl = fixture.debugElement.query(By.css('input')).nativeElement;
        expect(loginEl.value).toBe('some value');

        form.reset();
        expect(loginEl.value).toBe('');
      });

    });

    describe('value changes and status changes', () => {

      it('should mark controls as dirty before emitting a value change event', () => {
        const fixture = initTest(FormGroupComp);
        const login = new FormControl('oldValue');
        fixture.componentInstance.form = new FormGroup({'login': login});
        fixture.detectChanges();

        login.valueChanges.subscribe(() => { expect(login.dirty).toBe(true); });

        const loginEl = fixture.debugElement.query(By.css('input')).nativeElement;
        loginEl.value = 'newValue';

        dispatchEvent(loginEl, 'input');
      });

      it('should mark control as pristine before emitting a value change event when resetting ',
         () => {
           const fixture = initTest(FormGroupComp);
           const login = new FormControl('oldValue');
           const form = new FormGroup({'login': login});
           fixture.componentInstance.form = form;
           fixture.detectChanges();

           const loginEl = fixture.debugElement.query(By.css('input')).nativeElement;
           loginEl.value = 'newValue';
           dispatchEvent(loginEl, 'input');

           expect(login.pristine).toBe(false);

           login.valueChanges.subscribe(() => { expect(login.pristine).toBe(true); });

           form.reset();
         });

    });

    describe('setting status classes', () => {
      it('should work with single fields', () => {
        const fixture = initTest(FormControlComp);
        const control = new FormControl('', Validators.required);
        fixture.componentInstance.control = control;
        fixture.detectChanges();

        const input = fixture.debugElement.query(By.css('input')).nativeElement;
        expect(sortedClassList(input)).toEqual(['ng-invalid', 'ng-pristine', 'ng-untouched']);

        dispatchEvent(input, 'blur');
        fixture.detectChanges();

        expect(sortedClassList(input)).toEqual(['ng-invalid', 'ng-pristine', 'ng-touched']);

        input.value = 'updatedValue';
        dispatchEvent(input, 'input');
        fixture.detectChanges();

        expect(sortedClassList(input)).toEqual(['ng-dirty', 'ng-touched', 'ng-valid']);
      });

      it('should work with single fields and async validators', fakeAsync(() => {
           const fixture = initTest(FormControlComp);
           const control = new FormControl('', null !, uniqLoginAsyncValidator('good'));
           fixture.debugElement.componentInstance.control = control;
           fixture.detectChanges();

           const input = fixture.debugElement.query(By.css('input')).nativeElement;
           expect(sortedClassList(input)).toEqual(['ng-pending', 'ng-pristine', 'ng-untouched']);

           dispatchEvent(input, 'blur');
           fixture.detectChanges();
           expect(sortedClassList(input)).toEqual(['ng-pending', 'ng-pristine', 'ng-touched']);

           input.value = 'good';
           dispatchEvent(input, 'input');
           tick();
           fixture.detectChanges();

           expect(sortedClassList(input)).toEqual(['ng-dirty', 'ng-touched', 'ng-valid']);
         }));

      it('should work with single fields that combines async and sync validators', fakeAsync(() => {
           const fixture = initTest(FormControlComp);
           const control =
               new FormControl('', Validators.required, uniqLoginAsyncValidator('good'));
           fixture.debugElement.componentInstance.control = control;
           fixture.detectChanges();

           const input = fixture.debugElement.query(By.css('input')).nativeElement;
           expect(sortedClassList(input)).toEqual(['ng-invalid', 'ng-pristine', 'ng-untouched']);

           dispatchEvent(input, 'blur');
           fixture.detectChanges();
           expect(sortedClassList(input)).toEqual(['ng-invalid', 'ng-pristine', 'ng-touched']);

           input.value = 'bad';
           dispatchEvent(input, 'input');
           fixture.detectChanges();

           expect(sortedClassList(input)).toEqual(['ng-dirty', 'ng-pending', 'ng-touched']);

           tick();
           fixture.detectChanges();

           expect(sortedClassList(input)).toEqual(['ng-dirty', 'ng-invalid', 'ng-touched']);

           input.value = 'good';
           dispatchEvent(input, 'input');
           tick();
           fixture.detectChanges();

           expect(sortedClassList(input)).toEqual(['ng-dirty', 'ng-touched', 'ng-valid']);
         }));

      it('should work with single fields in parent forms', () => {
        const fixture = initTest(FormGroupComp);
        const form = new FormGroup({'login': new FormControl('', Validators.required)});
        fixture.componentInstance.form = form;
        fixture.detectChanges();

        const input = fixture.debugElement.query(By.css('input')).nativeElement;
        expect(sortedClassList(input)).toEqual(['ng-invalid', 'ng-pristine', 'ng-untouched']);

        dispatchEvent(input, 'blur');
        fixture.detectChanges();

        expect(sortedClassList(input)).toEqual(['ng-invalid', 'ng-pristine', 'ng-touched']);

        input.value = 'updatedValue';
        dispatchEvent(input, 'input');
        fixture.detectChanges();

        expect(sortedClassList(input)).toEqual(['ng-dirty', 'ng-touched', 'ng-valid']);
      });

      it('should work with formGroup', () => {
        const fixture = initTest(FormGroupComp);
        const form = new FormGroup({'login': new FormControl('', Validators.required)});
        fixture.componentInstance.form = form;
        fixture.detectChanges();

        const input = fixture.debugElement.query(By.css('input')).nativeElement;
        const formEl = fixture.debugElement.query(By.css('form')).nativeElement;

        expect(sortedClassList(formEl)).toEqual(['ng-invalid', 'ng-pristine', 'ng-untouched']);

        dispatchEvent(input, 'blur');
        fixture.detectChanges();

        expect(sortedClassList(formEl)).toEqual(['ng-invalid', 'ng-pristine', 'ng-touched']);

        input.value = 'updatedValue';
        dispatchEvent(input, 'input');
        fixture.detectChanges();

        expect(sortedClassList(formEl)).toEqual(['ng-dirty', 'ng-touched', 'ng-valid']);
      });

    });

    describe('ngModel interactions', () => {

      it('should support ngModel for complex forms', fakeAsync(() => {
           const fixture = initTest(FormGroupNgModel);
           fixture.componentInstance.form = new FormGroup({'login': new FormControl('')});
           fixture.componentInstance.login = 'oldValue';
           fixture.detectChanges();
           tick();

           const input = fixture.debugElement.query(By.css('input')).nativeElement;
           expect(input.value).toEqual('oldValue');

           input.value = 'updatedValue';
           dispatchEvent(input, 'input');

           tick();
           expect(fixture.componentInstance.login).toEqual('updatedValue');
         }));

      it('should support ngModel for single fields', fakeAsync(() => {
           const fixture = initTest(FormControlNgModel);
           fixture.componentInstance.control = new FormControl('');
           fixture.componentInstance.login = 'oldValue';
           fixture.detectChanges();
           tick();

           const input = fixture.debugElement.query(By.css('input')).nativeElement;
           expect(input.value).toEqual('oldValue');

           input.value = 'updatedValue';
           dispatchEvent(input, 'input');
           tick();

           expect(fixture.componentInstance.login).toEqual('updatedValue');
         }));

      it('should not update the view when the value initially came from the view', fakeAsync(() => {
           const fixture = initTest(FormControlNgModel);
           fixture.componentInstance.control = new FormControl('');
           fixture.detectChanges();
           tick();

           const input = fixture.debugElement.query(By.css('input')).nativeElement;
           input.value = 'aa';
           input.setSelectionRange(1, 2);
           dispatchEvent(input, 'input');

           fixture.detectChanges();
           tick();

           // selection start has not changed because we did not reset the value
           expect(input.selectionStart).toEqual(1);
         }));

    });

    describe('validations', () => {
      it('required validator should validate checkbox', () => {
        const fixture = initTest(FormControlCheckboxRequiredValidator);
        const control = new FormControl(false, Validators.requiredTrue);
        fixture.componentInstance.control = control;
        fixture.detectChanges();

        const checkbox = fixture.debugElement.query(By.css('input'));
        expect(checkbox.nativeElement.checked).toBe(false);
        expect(control.hasError('required')).toEqual(true);

        checkbox.nativeElement.checked = true;
        dispatchEvent(checkbox.nativeElement, 'change');
        fixture.detectChanges();

        expect(checkbox.nativeElement.checked).toBe(true);
        expect(control.hasError('required')).toEqual(false);
      });

      it('should use sync validators defined in html', () => {
        const fixture = initTest(LoginIsEmptyWrapper, LoginIsEmptyValidator);
        const form = new FormGroup({
          'login': new FormControl(''),
          'min': new FormControl(''),
          'max': new FormControl(''),
          'pattern': new FormControl('')
        });
        fixture.componentInstance.form = form;
        fixture.detectChanges();

        const required = fixture.debugElement.query(By.css('[required]'));
        const minLength = fixture.debugElement.query(By.css('[minlength]'));
        const maxLength = fixture.debugElement.query(By.css('[maxlength]'));
        const pattern = fixture.debugElement.query(By.css('[pattern]'));

        required.nativeElement.value = '';
        minLength.nativeElement.value = '1';
        maxLength.nativeElement.value = '1234';
        pattern.nativeElement.value = '12';

        dispatchEvent(required.nativeElement, 'input');
        dispatchEvent(minLength.nativeElement, 'input');
        dispatchEvent(maxLength.nativeElement, 'input');
        dispatchEvent(pattern.nativeElement, 'input');

        expect(form.hasError('required', ['login'])).toEqual(true);
        expect(form.hasError('minlength', ['min'])).toEqual(true);
        expect(form.hasError('maxlength', ['max'])).toEqual(true);
        expect(form.hasError('pattern', ['pattern'])).toEqual(true);
        expect(form.hasError('loginIsEmpty')).toEqual(true);

        required.nativeElement.value = '1';
        minLength.nativeElement.value = '123';
        maxLength.nativeElement.value = '123';
        pattern.nativeElement.value = '123';

        dispatchEvent(required.nativeElement, 'input');
        dispatchEvent(minLength.nativeElement, 'input');
        dispatchEvent(maxLength.nativeElement, 'input');
        dispatchEvent(pattern.nativeElement, 'input');

        expect(form.valid).toEqual(true);
      });

      it('should use sync validators using bindings', () => {
        const fixture = initTest(ValidationBindingsForm);
        const form = new FormGroup({
          'login': new FormControl(''),
          'min': new FormControl(''),
          'max': new FormControl(''),
          'pattern': new FormControl('')
        });
        fixture.componentInstance.form = form;
        fixture.componentInstance.required = true;
        fixture.componentInstance.minLen = 3;
        fixture.componentInstance.maxLen = 3;
        fixture.componentInstance.pattern = '.{3,}';
        fixture.detectChanges();

        const required = fixture.debugElement.query(By.css('[name=required]'));
        const minLength = fixture.debugElement.query(By.css('[name=minlength]'));
        const maxLength = fixture.debugElement.query(By.css('[name=maxlength]'));
        const pattern = fixture.debugElement.query(By.css('[name=pattern]'));

        required.nativeElement.value = '';
        minLength.nativeElement.value = '1';
        maxLength.nativeElement.value = '1234';
        pattern.nativeElement.value = '12';

        dispatchEvent(required.nativeElement, 'input');
        dispatchEvent(minLength.nativeElement, 'input');
        dispatchEvent(maxLength.nativeElement, 'input');
        dispatchEvent(pattern.nativeElement, 'input');

        expect(form.hasError('required', ['login'])).toEqual(true);
        expect(form.hasError('minlength', ['min'])).toEqual(true);
        expect(form.hasError('maxlength', ['max'])).toEqual(true);
        expect(form.hasError('pattern', ['pattern'])).toEqual(true);

        required.nativeElement.value = '1';
        minLength.nativeElement.value = '123';
        maxLength.nativeElement.value = '123';
        pattern.nativeElement.value = '123';

        dispatchEvent(required.nativeElement, 'input');
        dispatchEvent(minLength.nativeElement, 'input');
        dispatchEvent(maxLength.nativeElement, 'input');
        dispatchEvent(pattern.nativeElement, 'input');

        expect(form.valid).toEqual(true);
      });

      it('changes on bound properties should change the validation state of the form', () => {
        const fixture = initTest(ValidationBindingsForm);
        const form = new FormGroup({
          'login': new FormControl(''),
          'min': new FormControl(''),
          'max': new FormControl(''),
          'pattern': new FormControl('')
        });
        fixture.componentInstance.form = form;
        fixture.detectChanges();

        const required = fixture.debugElement.query(By.css('[name=required]'));
        const minLength = fixture.debugElement.query(By.css('[name=minlength]'));
        const maxLength = fixture.debugElement.query(By.css('[name=maxlength]'));
        const pattern = fixture.debugElement.query(By.css('[name=pattern]'));

        required.nativeElement.value = '';
        minLength.nativeElement.value = '1';
        maxLength.nativeElement.value = '1234';
        pattern.nativeElement.value = '12';

        dispatchEvent(required.nativeElement, 'input');
        dispatchEvent(minLength.nativeElement, 'input');
        dispatchEvent(maxLength.nativeElement, 'input');
        dispatchEvent(pattern.nativeElement, 'input');

        expect(form.hasError('required', ['login'])).toEqual(false);
        expect(form.hasError('minlength', ['min'])).toEqual(false);
        expect(form.hasError('maxlength', ['max'])).toEqual(false);
        expect(form.hasError('pattern', ['pattern'])).toEqual(false);
        expect(form.valid).toEqual(true);

        fixture.componentInstance.required = true;
        fixture.componentInstance.minLen = 3;
        fixture.componentInstance.maxLen = 3;
        fixture.componentInstance.pattern = '.{3,}';
        fixture.detectChanges();

        dispatchEvent(required.nativeElement, 'input');
        dispatchEvent(minLength.nativeElement, 'input');
        dispatchEvent(maxLength.nativeElement, 'input');
        dispatchEvent(pattern.nativeElement, 'input');

        expect(form.hasError('required', ['login'])).toEqual(true);
        expect(form.hasError('minlength', ['min'])).toEqual(true);
        expect(form.hasError('maxlength', ['max'])).toEqual(true);
        expect(form.hasError('pattern', ['pattern'])).toEqual(true);
        expect(form.valid).toEqual(false);

        expect(required.nativeElement.getAttribute('required')).toEqual('');
        expect(fixture.componentInstance.minLen.toString())
            .toEqual(minLength.nativeElement.getAttribute('minlength'));
        expect(fixture.componentInstance.maxLen.toString())
            .toEqual(maxLength.nativeElement.getAttribute('maxlength'));
        expect(fixture.componentInstance.pattern.toString())
            .toEqual(pattern.nativeElement.getAttribute('pattern'));

        fixture.componentInstance.required = false;
        fixture.componentInstance.minLen = null !;
        fixture.componentInstance.maxLen = null !;
        fixture.componentInstance.pattern = null !;
        fixture.detectChanges();

        expect(form.hasError('required', ['login'])).toEqual(false);
        expect(form.hasError('minlength', ['min'])).toEqual(false);
        expect(form.hasError('maxlength', ['max'])).toEqual(false);
        expect(form.hasError('pattern', ['pattern'])).toEqual(false);
        expect(form.valid).toEqual(true);

        expect(required.nativeElement.getAttribute('required')).toEqual(null);
        expect(required.nativeElement.getAttribute('minlength')).toEqual(null);
        expect(required.nativeElement.getAttribute('maxlength')).toEqual(null);
        expect(required.nativeElement.getAttribute('pattern')).toEqual(null);
      });

      it('should support rebound controls with rebound validators', () => {
        const fixture = initTest(ValidationBindingsForm);
        const form = new FormGroup({
          'login': new FormControl(''),
          'min': new FormControl(''),
          'max': new FormControl(''),
          'pattern': new FormControl('')
        });
        fixture.componentInstance.form = form;
        fixture.componentInstance.required = true;
        fixture.componentInstance.minLen = 3;
        fixture.componentInstance.maxLen = 3;
        fixture.componentInstance.pattern = '.{3,}';
        fixture.detectChanges();

        const newForm = new FormGroup({
          'login': new FormControl(''),
          'min': new FormControl(''),
          'max': new FormControl(''),
          'pattern': new FormControl('')
        });
        fixture.componentInstance.form = newForm;
        fixture.detectChanges();

        fixture.componentInstance.required = false;
        fixture.componentInstance.minLen = null !;
        fixture.componentInstance.maxLen = null !;
        fixture.componentInstance.pattern = null !;
        fixture.detectChanges();

        expect(newForm.hasError('required', ['login'])).toEqual(false);
        expect(newForm.hasError('minlength', ['min'])).toEqual(false);
        expect(newForm.hasError('maxlength', ['max'])).toEqual(false);
        expect(newForm.hasError('pattern', ['pattern'])).toEqual(false);
        expect(newForm.valid).toEqual(true);
      });

      it('should use async validators defined in the html', fakeAsync(() => {
           const fixture = initTest(UniqLoginWrapper, UniqLoginValidator);
           const form = new FormGroup({'login': new FormControl('')});
           tick();
           fixture.componentInstance.form = form;
           fixture.detectChanges();

           expect(form.pending).toEqual(true);
           tick(100);

           expect(form.hasError('uniqLogin', ['login'])).toEqual(true);

           const input = fixture.debugElement.query(By.css('input'));
           input.nativeElement.value = 'expected';
           dispatchEvent(input.nativeElement, 'input');
           tick(100);

           expect(form.valid).toEqual(true);
         }));

      it('should use sync validators defined in the model', () => {
        const fixture = initTest(FormGroupComp);
        const form = new FormGroup({'login': new FormControl('aa', Validators.required)});
        fixture.componentInstance.form = form;
        fixture.detectChanges();
        expect(form.valid).toEqual(true);

        const input = fixture.debugElement.query(By.css('input'));
        input.nativeElement.value = '';
        dispatchEvent(input.nativeElement, 'input');

        expect(form.valid).toEqual(false);
      });

      it('should use async validators defined in the model', fakeAsync(() => {
           const fixture = initTest(FormGroupComp);
           const control =
               new FormControl('', Validators.required, uniqLoginAsyncValidator('expected'));
           const form = new FormGroup({'login': control});
           fixture.componentInstance.form = form;
           fixture.detectChanges();
           tick();

           expect(form.hasError('required', ['login'])).toEqual(true);

           const input = fixture.debugElement.query(By.css('input'));
           input.nativeElement.value = 'wrong value';
           dispatchEvent(input.nativeElement, 'input');

           expect(form.pending).toEqual(true);
           tick();

           expect(form.hasError('uniqLogin', ['login'])).toEqual(true);

           input.nativeElement.value = 'expected';
           dispatchEvent(input.nativeElement, 'input');
           tick();

           expect(form.valid).toEqual(true);
         }));

      it('async validator should not override result of sync validator', fakeAsync(() => {
           const fixture = initTest(FormGroupComp);
           const control =
               new FormControl('', Validators.required, uniqLoginAsyncValidator('expected', 100));
           fixture.componentInstance.form = new FormGroup({'login': control});
           fixture.detectChanges();
           tick();

           expect(control.hasError('required')).toEqual(true);

           const input = fixture.debugElement.query(By.css('input'));
           input.nativeElement.value = 'expected';
           dispatchEvent(input.nativeElement, 'input');

           expect(control.pending).toEqual(true);

           input.nativeElement.value = '';
           dispatchEvent(input.nativeElement, 'input');
           tick(110);

           expect(control.valid).toEqual(false);
         }));

      it('should cancel observable properly between validation runs', fakeAsync(() => {
           const fixture = initTest(FormControlComp);
           const resultArr: number[] = [];
           fixture.componentInstance.control =
               new FormControl('', null !, observableValidator(resultArr));
           fixture.detectChanges();
           tick(100);

           expect(resultArr.length).toEqual(1, `Expected source observable to emit once on init.`);

           const input = fixture.debugElement.query(By.css('input'));
           input.nativeElement.value = 'a';
           dispatchEvent(input.nativeElement, 'input');
           fixture.detectChanges();

           input.nativeElement.value = 'aa';
           dispatchEvent(input.nativeElement, 'input');
           fixture.detectChanges();

           tick(100);
           expect(resultArr.length)
               .toEqual(2, `Expected original observable to be canceled on the next value change.`)
         }));


    });

    describe('errors', () => {

      it('should throw if a form isn\'t passed into formGroup', () => {
        const fixture = initTest(FormGroupComp);

        expect(() => fixture.detectChanges())
            .toThrowError(new RegExp(`formGroup expects a FormGroup instance`));
      });

      it('should throw if formControlName is used without a control container', () => {
        TestBed.overrideComponent(FormGroupComp, {
          set: {
            template: `
          <input type="text" formControlName="login">
        `
          }
        });
        const fixture = initTest(FormGroupComp);

        expect(() => fixture.detectChanges())
            .toThrowError(
                new RegExp(`formControlName must be used with a parent formGroup directive`));
      });

      it('should throw if formControlName is used with NgForm', () => {
        TestBed.overrideComponent(FormGroupComp, {
          set: {
            template: `
          <form>
            <input type="text" formControlName="login">
          </form>
        `
          }
        });
        const fixture = initTest(FormGroupComp);

        expect(() => fixture.detectChanges())
            .toThrowError(
                new RegExp(`formControlName must be used with a parent formGroup directive.`));
      });

      it('should throw if formControlName is used with NgModelGroup', () => {
        TestBed.overrideComponent(FormGroupComp, {
          set: {
            template: `
          <form>
            <div ngModelGroup="parent">
              <input type="text" formControlName="login">
            </div>
          </form>
        `
          }
        });
        const fixture = initTest(FormGroupComp);

        expect(() => fixture.detectChanges())
            .toThrowError(
                new RegExp(`formControlName cannot be used with an ngModelGroup parent.`));
      });

      it('should throw if formGroupName is used without a control container', () => {
        TestBed.overrideComponent(FormGroupComp, {
          set: {
            template: `
          <div formGroupName="person">
            <input type="text" formControlName="login">
          </div>
        `
          }
        });
        const fixture = initTest(FormGroupComp);

        expect(() => fixture.detectChanges())
            .toThrowError(
                new RegExp(`formGroupName must be used with a parent formGroup directive`));
      });

      it('should throw if formGroupName is used with NgForm', () => {
        TestBed.overrideComponent(FormGroupComp, {
          set: {
            template: `
          <form>
            <div formGroupName="person">
              <input type="text" formControlName="login">
            </div>
          </form>
        `
          }
        });
        const fixture = initTest(FormGroupComp);

        expect(() => fixture.detectChanges())
            .toThrowError(
                new RegExp(`formGroupName must be used with a parent formGroup directive.`));
      });

      it('should throw if formArrayName is used without a control container', () => {
        TestBed.overrideComponent(FormGroupComp, {
          set: {
            template: `
         <div formArrayName="cities">
           <input type="text" formControlName="login">
         </div>`
          }
        });
        const fixture = initTest(FormGroupComp);

        expect(() => fixture.detectChanges())
            .toThrowError(
                new RegExp(`formArrayName must be used with a parent formGroup directive`));
      });

      it('should throw if ngModel is used alone under formGroup', () => {
        TestBed.overrideComponent(FormGroupComp, {
          set: {
            template: `
         <div [formGroup]="myGroup">
           <input type="text" [(ngModel)]="data">
         </div>
        `
          }
        });
        const fixture = initTest(FormGroupComp);
        fixture.componentInstance.myGroup = new FormGroup({});

        expect(() => fixture.detectChanges())
            .toThrowError(new RegExp(
                `ngModel cannot be used to register form controls with a parent formGroup directive.`));
      });

      it('should not throw if ngModel is used alone under formGroup with standalone: true', () => {
        TestBed.overrideComponent(FormGroupComp, {
          set: {
            template: `
         <div [formGroup]="myGroup">
            <input type="text" [(ngModel)]="data" [ngModelOptions]="{standalone: true}">
         </div>
        `
          }
        });
        const fixture = initTest(FormGroupComp);
        fixture.componentInstance.myGroup = new FormGroup({});

        expect(() => fixture.detectChanges()).not.toThrowError();
      });

      it('should throw if ngModel is used alone with formGroupName', () => {
        TestBed.overrideComponent(FormGroupComp, {
          set: {
            template: `
          <div [formGroup]="myGroup">
            <div formGroupName="person">
              <input type="text" [(ngModel)]="data">
            </div>
          </div>
        `
          }
        });
        const fixture = initTest(FormGroupComp);
        const myGroup = new FormGroup({person: new FormGroup({})});
        fixture.componentInstance.myGroup = new FormGroup({person: new FormGroup({})});

        expect(() => fixture.detectChanges())
            .toThrowError(new RegExp(
                `ngModel cannot be used to register form controls with a parent formGroupName or formArrayName directive.`));
      });

      it('should throw if ngModelGroup is used with formGroup', () => {
        TestBed.overrideComponent(FormGroupComp, {
          set: {
            template: `
          <div [formGroup]="myGroup">
            <div ngModelGroup="person">
              <input type="text" [(ngModel)]="data">
            </div>
          </div>
        `
          }
        });
        const fixture = initTest(FormGroupComp);
        fixture.componentInstance.myGroup = new FormGroup({});

        expect(() => fixture.detectChanges())
            .toThrowError(
                new RegExp(`ngModelGroup cannot be used with a parent formGroup directive`));
      });

      it('should throw if radio button name does not match formControlName attr', () => {
        TestBed.overrideComponent(FormGroupComp, {
          set: {
            template: `
          <form [formGroup]="form">hav
            <input type="radio" formControlName="food" name="drink" value="chicken">
          </form>`
          }
        });
        const fixture = initTest(FormGroupComp);
        fixture.componentInstance.form = new FormGroup({'food': new FormControl('fish')});

        expect(() => fixture.detectChanges())
            .toThrowError(new RegExp('If you define both a name and a formControlName'));
      });

    });

    describe('IME events', () => {

      it('should determine IME event handling depending on platform by default', () => {
        const fixture = initTest(FormControlComp);
        fixture.componentInstance.control = new FormControl('oldValue');
        fixture.detectChanges();

        const inputEl = fixture.debugElement.query(By.css('input'));
        const inputNativeEl = inputEl.nativeElement;
        expect(inputNativeEl.value).toEqual('oldValue');

        inputEl.triggerEventHandler('compositionstart', null);

        inputNativeEl.value = 'updatedValue';
        dispatchEvent(inputNativeEl, 'input');
        const isAndroid = /android (\d+)/.test(getDOM().getUserAgent().toLowerCase());

        if (isAndroid) {
          // On Android, values should update immediately
          expect(fixture.componentInstance.control.value).toEqual('updatedValue');
        } else {
          // On other platforms, values should wait for compositionend
          expect(fixture.componentInstance.control.value).toEqual('oldValue');

          inputEl.triggerEventHandler('compositionend', {target: {value: 'updatedValue'}});
          fixture.detectChanges();
          expect(fixture.componentInstance.control.value).toEqual('updatedValue');
        }
      });

      it('should hold IME events until compositionend if composition mode', () => {
        TestBed.overrideComponent(
            FormControlComp,
            {set: {providers: [{provide: COMPOSITION_BUFFER_MODE, useValue: true}]}});
        const fixture = initTest(FormControlComp);
        fixture.componentInstance.control = new FormControl('oldValue');
        fixture.detectChanges();

        const inputEl = fixture.debugElement.query(By.css('input'));
        const inputNativeEl = inputEl.nativeElement;
        expect(inputNativeEl.value).toEqual('oldValue');

        inputEl.triggerEventHandler('compositionstart', null);

        inputNativeEl.value = 'updatedValue';
        dispatchEvent(inputNativeEl, 'input');

        // should not update when compositionstart
        expect(fixture.componentInstance.control.value).toEqual('oldValue');

        inputEl.triggerEventHandler('compositionend', {target: {value: 'updatedValue'}});

        fixture.detectChanges();

        // should update when compositionend
        expect(fixture.componentInstance.control.value).toEqual('updatedValue');
      });

      it('should work normally with composition events if composition mode is off', () => {
        TestBed.overrideComponent(
            FormControlComp,
            {set: {providers: [{provide: COMPOSITION_BUFFER_MODE, useValue: false}]}});
        const fixture = initTest(FormControlComp);
        fixture.componentInstance.control = new FormControl('oldValue');
        fixture.detectChanges();

        const inputEl = fixture.debugElement.query(By.css('input'));
        const inputNativeEl = inputEl.nativeElement;
        expect(inputNativeEl.value).toEqual('oldValue');

        inputEl.triggerEventHandler('compositionstart', null);

        inputNativeEl.value = 'updatedValue';
        dispatchEvent(inputNativeEl, 'input');
        fixture.detectChanges();

        // formControl should update normally
        expect(fixture.componentInstance.control.value).toEqual('updatedValue');
      });
    });
  });
}

function uniqLoginAsyncValidator(expectedValue: string, timeout: number = 0) {
  return (c: AbstractControl) => {
    let resolve: (result: any) => void;
    const promise = new Promise(res => { resolve = res; });
    const res = (c.value == expectedValue) ? null : {'uniqLogin': true};
    setTimeout(() => resolve(res), timeout);
    return promise;
  };
}

function observableValidator(resultArr: number[]): AsyncValidatorFn {
  return (c: AbstractControl) => {
    return _do.call(timer(100), (resp: any) => resultArr.push(resp));
  };
}

function loginIsEmptyGroupValidator(c: FormGroup) {
  return c.controls['login'].value == '' ? {'loginIsEmpty': true} : null;
}

@Directive({
  selector: '[login-is-empty-validator]',
  providers: [{provide: NG_VALIDATORS, useValue: loginIsEmptyGroupValidator, multi: true}]
})
class LoginIsEmptyValidator {
}

@Directive({
  selector: '[uniq-login-validator]',
  providers: [{
    provide: NG_ASYNC_VALIDATORS,
    useExisting: forwardRef(() => UniqLoginValidator),
    multi: true
  }]
})
class UniqLoginValidator implements AsyncValidator {
  @Input('uniq-login-validator') expected: any;

  validate(c: AbstractControl) { return uniqLoginAsyncValidator(this.expected)(c); }
}

function sortedClassList(el: HTMLElement) {
  return getDOM().classList(el).sort();
}

@Component({selector: 'form-control-comp', template: `<input type="text" [formControl]="control">`})
class FormControlComp {
  control: FormControl;
}

@Component({
  selector: 'form-group-comp',
  template: `
    <form [formGroup]="form" (ngSubmit)="event=$event">
      <input type="text" formControlName="login">
    </form>`
})
class FormGroupComp {
  control: FormControl;
  form: FormGroup;
  myGroup: FormGroup;
  event: Event;
}

@Component({
  selector: 'nested-form-group-comp',
  template: `
    <form [formGroup]="form">
      <div formGroupName="signin" login-is-empty-validator>
        <input formControlName="login">
        <input formControlName="password">
      </div>
      <input *ngIf="form.contains('email')" formControlName="email">
    </form>`
})
class NestedFormGroupComp {
  form: FormGroup;
}

@Component({
  selector: 'form-array-comp',
  template: `
    <div [formGroup]="form">
      <div formArrayName="cities">
        <div *ngFor="let city of cityArray.controls; let i=index">
          <input [formControlName]="i">
        </div>
      </div>
     </div>`
})
class FormArrayComp {
  form: FormGroup;
  cityArray: FormArray;
}

@Component({
  selector: 'form-array-nested-group',
  template: `
     <div [formGroup]="form">
      <div formArrayName="cities">
        <div *ngFor="let city of cityArray.controls; let i=index" [formGroupName]="i">
          <input formControlName="town">
          <input formControlName="state">
        </div>
      </div>
     </div>`
})
class FormArrayNestedGroup {
  form: FormGroup;
  cityArray: FormArray;
}


@Component({
  selector: 'form-group-ng-model',
  template: `
  <div [formGroup]="form">
    <input type="text" formControlName="login" [(ngModel)]="login">
   </div>`
})
class FormGroupNgModel {
  form: FormGroup;
  login: string;
}

@Component({
  selector: 'form-control-ng-model',
  template: `<input type="text" [formControl]="control" [(ngModel)]="login">`
})
class FormControlNgModel {
  control: FormControl;
  login: string;
}

@Component({
  selector: 'login-is-empty-wrapper',
  template: `
    <div [formGroup]="form" login-is-empty-validator>
      <input type="text" formControlName="login" required>
      <input type="text" formControlName="min" minlength="3">
      <input type="text" formControlName="max" maxlength="3">
      <input type="text" formControlName="pattern" pattern=".{3,}">
   </div>`
})
class LoginIsEmptyWrapper {
  form: FormGroup;
}

@Component({
  selector: 'validation-bindings-form',
  template: `
    <div [formGroup]="form">
      <input name="required" type="text" formControlName="login" [required]="required">
      <input name="minlength" type="text" formControlName="min" [minlength]="minLen">
      <input name="maxlength" type="text" formControlName="max" [maxlength]="maxLen">
      <input name="pattern" type="text" formControlName="pattern" [pattern]="pattern">
   </div>`
})
class ValidationBindingsForm {
  form: FormGroup;
  required: boolean;
  minLen: number;
  maxLen: number;
  pattern: string;
}

@Component({
  selector: 'form-control-checkbox-validator',
  template: `<input type="checkbox" [formControl]="control">`
})
class FormControlCheckboxRequiredValidator {
  control: FormControl;
}

@Component({
  selector: 'uniq-login-wrapper',
  template: `
  <div [formGroup]="form">
    <input type="text" formControlName="login" uniq-login-validator="expected">
  </div>`
})
class UniqLoginWrapper {
  form: FormGroup;
}