/**
 * @license
 * Copyright Google LLC 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 {CommonModule, ɵgetDOM as getDOM} from '@angular/common';
import {Component, Directive, ElementRef, forwardRef, Input, Type, ViewChild} from '@angular/core';
import {ComponentFixture, fakeAsync, TestBed, tick, waitForAsync} from '@angular/core/testing';
import {
  AbstractControl,
  AsyncValidator,
  COMPOSITION_BUFFER_MODE,
  ControlValueAccessor,
  FormControl,
  FormsModule,
  MaxValidator,
  MinValidator,
  NG_ASYNC_VALIDATORS,
  NG_VALIDATORS,
  NG_VALUE_ACCESSOR,
  NgForm,
  NgModel,
  Validator,
} from '@angular/forms';
import {By} from '@angular/platform-browser/src/dom/debug/by';
import {dispatchEvent, sortedClassList} from '@angular/platform-browser/testing/src/browser_util';
import {merge} from 'rxjs';

import {NgModelCustomComp, NgModelCustomWrapper} from './value_accessor_integration_spec';

describe('template-driven forms integration tests', () => {
  function initTest<T>(component: Type<T>, ...directives: Type<any>[]): ComponentFixture<T> {
    TestBed.configureTestingModule({
      declarations: [component, ...directives],
      imports: [FormsModule, CommonModule],
    });
    return TestBed.createComponent(component);
  }

  describe('basic functionality', () => {
    it('should support ngModel for standalone fields', fakeAsync(() => {
      const fixture = initTest(StandaloneNgModel);
      fixture.componentInstance.name = 'oldValue';

      fixture.detectChanges();
      tick();

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

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

      // view -> model
      expect(fixture.componentInstance.name).toEqual('updatedValue');
    }));

    it('should support ngModel registration with a parent form', fakeAsync(() => {
      const fixture = initTest(NgModelForm);
      fixture.componentInstance.name = 'Nancy';

      fixture.detectChanges();
      tick();

      const form = fixture.debugElement.children[0].injector.get(NgForm);
      expect(form.value).toEqual({name: 'Nancy'});
      expect(form.valid).toBe(false);
    }));

    it('should report properties which are written outside of template bindings', async () => {
      // For example ngModel writes to `checked` property programmatically
      // (template does not contain binding to `checked` explicitly)
      // https://github.com/angular/angular/issues/33695
      @Component({
        selector: 'app-root',
        template: `<input type="radio" value="one" [(ngModel)]="active"/>`,
      })
      class AppComponent {
        active = 'one';
      }
      TestBed.configureTestingModule({imports: [FormsModule], declarations: [AppComponent]});
      const fixture = TestBed.createComponent(AppComponent);
      // We need the Await as `ngModel` writes data asynchronously into the DOM
      await fixture.detectChanges();
      const input = fixture.debugElement.query(By.css('input'));
      expect(input.properties['checked']).toBe(true);
      expect(input.nativeElement.checked).toBe(true);
    });

    it('should add novalidate by default to form element', fakeAsync(() => {
      const fixture = initTest(NgModelForm);

      fixture.detectChanges();
      tick();

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

    it('should be possible to use native validation and angular forms', fakeAsync(() => {
      const fixture = initTest(NgModelNativeValidateForm);

      fixture.detectChanges();
      tick();

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

    it('should support ngModelGroup', fakeAsync(() => {
      const fixture = initTest(NgModelGroupForm);
      fixture.componentInstance.first = 'Nancy';
      fixture.componentInstance.last = 'Drew';
      fixture.componentInstance.email = 'some email';

      fixture.detectChanges();
      tick();

      // model -> view
      const inputs = fixture.debugElement.queryAll(By.css('input'));
      expect(inputs[0].nativeElement.value).toEqual('Nancy');
      expect(inputs[1].nativeElement.value).toEqual('Drew');

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

      // view -> model
      const form = fixture.debugElement.children[0].injector.get(NgForm);
      expect(form.value).toEqual({name: {first: 'Carson', last: 'Drew'}, email: 'some email'});
    }));

    it('should add controls and control groups to form control model', fakeAsync(() => {
      const fixture = initTest(NgModelGroupForm);
      fixture.componentInstance.first = 'Nancy';
      fixture.componentInstance.last = 'Drew';
      fixture.componentInstance.email = 'some email';

      fixture.detectChanges();
      tick();

      const form = fixture.debugElement.children[0].injector.get(NgForm);
      expect(form.control.get('name')!.value).toEqual({first: 'Nancy', last: 'Drew'});
      expect(form.control.get('name.first')!.value).toEqual('Nancy');
      expect(form.control.get('email')!.value).toEqual('some email');
    }));

    it('should remove controls and control groups from form control model', fakeAsync(() => {
      const fixture = initTest(NgModelNgIfForm);
      fixture.componentInstance.emailShowing = true;
      fixture.componentInstance.first = 'Nancy';
      fixture.componentInstance.email = 'some email';
      fixture.detectChanges();
      tick();

      const form = fixture.debugElement.children[0].injector.get(NgForm);
      expect(form.control.get('email')!.value).toEqual('some email');
      expect(form.value).toEqual({name: {first: 'Nancy'}, email: 'some email'});

      // should remove individual control successfully
      fixture.componentInstance.emailShowing = false;
      fixture.detectChanges();
      tick();

      expect(form.control.get('email')).toBe(null);
      expect(form.value).toEqual({name: {first: 'Nancy'}});

      expect(form.control.get('name')!.value).toEqual({first: 'Nancy'});
      expect(form.control.get('name.first')!.value).toEqual('Nancy');

      // should remove form group successfully
      fixture.componentInstance.groupShowing = false;
      fixture.detectChanges();
      tick();

      expect(form.control.get('name')).toBe(null);
      expect(form.control.get('name.first')).toBe(null);
      expect(form.value).toEqual({});
    }));

    it('should set status classes with ngModel', waitForAsync(() => {
      const fixture = initTest(NgModelForm);
      fixture.componentInstance.name = 'aa';
      fixture.detectChanges();
      fixture.whenStable().then(() => {
        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']);

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

        expect(sortedClassList(formEl)).toEqual([
          'ng-dirty',
          'ng-submitted',
          'ng-touched',
          'ng-valid',
        ]);
        expect(sortedClassList(input)).not.toContain('ng-submitted');

        dispatchEvent(formEl, 'reset');
        fixture.detectChanges();

        expect(sortedClassList(formEl)).toEqual(['ng-pristine', 'ng-untouched', 'ng-valid']);
        expect(sortedClassList(input)).not.toContain('ng-submitted');
      });
    }));

    it('should set status classes with ngModel and async validators', fakeAsync(() => {
      const fixture = initTest(NgModelAsyncValidation, NgAsyncValidator);
      fixture.whenStable().then(() => {
        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 = 'updatedValue';
        dispatchEvent(input, 'input');
        tick();
        fixture.detectChanges();

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

    it('should set status classes with ngModelGroup and ngForm', waitForAsync(() => {
      const fixture = initTest(NgModelGroupForm);
      fixture.componentInstance.first = '';
      fixture.detectChanges();

      const form = fixture.debugElement.query(By.css('form')).nativeElement;
      const modelGroup = fixture.debugElement.query(By.css('[ngModelGroup]')).nativeElement;
      const input = fixture.debugElement.query(By.css('input')).nativeElement;

      // ngModelGroup creates its control asynchronously
      fixture.whenStable().then(() => {
        fixture.detectChanges();
        expect(sortedClassList(modelGroup)).toEqual(['ng-invalid', 'ng-pristine', 'ng-untouched']);

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

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

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

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

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

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

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

    it('should set status classes involving nested FormGroups', async () => {
      const fixture = initTest(NgModelNestedForm);
      fixture.componentInstance.first = '';
      fixture.componentInstance.other = '';
      fixture.detectChanges();

      const form = fixture.debugElement.query(By.css('form')).nativeElement;
      const modelGroup = fixture.debugElement.query(By.css('[ngModelGroup]')).nativeElement;
      const input = fixture.debugElement.query(By.css('input')).nativeElement;

      await fixture.whenStable();
      fixture.detectChanges();
      expect(sortedClassList(modelGroup)).toEqual(['ng-pristine', 'ng-untouched', 'ng-valid']);

      expect(sortedClassList(form)).toEqual(['ng-pristine', 'ng-untouched', 'ng-valid']);

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

      expect(sortedClassList(modelGroup)).toEqual(['ng-pristine', 'ng-untouched', 'ng-valid']);
      expect(sortedClassList(form)).toEqual([
        'ng-pristine',
        'ng-submitted',
        'ng-untouched',
        'ng-valid',
      ]);
      expect(sortedClassList(input)).not.toContain('ng-submitted');

      dispatchEvent(formEl, 'reset');
      fixture.detectChanges();

      expect(sortedClassList(modelGroup)).toEqual(['ng-pristine', 'ng-untouched', 'ng-valid']);
      expect(sortedClassList(form)).toEqual(['ng-pristine', 'ng-untouched', 'ng-valid']);
      expect(sortedClassList(input)).not.toContain('ng-submitted');
    });

    it('should not create a template-driven form when ngNoForm is used', () => {
      const fixture = initTest(NgNoFormComp);
      fixture.detectChanges();
      expect(fixture.debugElement.children[0].providerTokens!.length).toEqual(0);
    });

    it('should not add novalidate when ngNoForm is used', () => {
      const fixture = initTest(NgNoFormComp);
      fixture.detectChanges();
      const form = fixture.debugElement.query(By.css('form'));
      expect(form.nativeElement.hasAttribute('novalidate')).toEqual(false);
    });

    it('should keep track of the ngModel value when together used with an ngFor inside a form', fakeAsync(() => {
      @Component({
        template: `
              <form>
                <div *ngFor="let item of items; index as i">
                  <input [(ngModel)]="item.value" name="name-{{i}}">
                </div>
              </form>
            `,
      })
      class App {
        private _counter = 0;
        items: {value: string}[] = [];

        add(amount: number) {
          for (let i = 0; i < amount; i++) {
            this.items.push({value: `${this._counter++}`});
          }
        }

        remove(index: number) {
          this.items.splice(index, 1);
        }
      }

      const getValues = () =>
        fixture.debugElement.queryAll(By.css('input')).map((el) => el.nativeElement.value);
      const fixture = initTest(App);
      fixture.componentInstance.add(3);
      fixture.detectChanges();
      tick();
      expect(getValues()).toEqual(['0', '1', '2']);

      fixture.componentInstance.remove(1);
      fixture.detectChanges();
      tick();
      expect(getValues()).toEqual(['0', '2']);

      fixture.componentInstance.add(1);
      fixture.detectChanges();
      tick();
      expect(getValues()).toEqual(['0', '2', '3']);

      fixture.componentInstance.items[1].value = '1';
      fixture.detectChanges();
      tick();
      expect(getValues()).toEqual(['0', '1', '3']);

      fixture.componentInstance.items[2].value = '2';
      fixture.detectChanges();
      tick();
      expect(getValues()).toEqual(['0', '1', '2']);
    }));

    it('should keep track of the ngModel value when together used with an ngFor inside an ngModelGroup', fakeAsync(() => {
      @Component({
        template: `
              <form>
                <ng-container ngModelGroup="group">
                  <div *ngFor="let item of items; index as i">
                    <input [(ngModel)]="item.value" name="name-{{i}}">
                  </div>
                </ng-container>
              </form>
            `,
      })
      class App {
        private _counter = 0;
        group = {};
        items: {value: string}[] = [];

        add(amount: number) {
          for (let i = 0; i < amount; i++) {
            this.items.push({value: `${this._counter++}`});
          }
        }

        remove(index: number) {
          this.items.splice(index, 1);
        }
      }

      const getValues = () =>
        fixture.debugElement.queryAll(By.css('input')).map((el) => el.nativeElement.value);
      const fixture = initTest(App);
      fixture.componentInstance.add(3);
      fixture.detectChanges();
      tick();
      expect(getValues()).toEqual(['0', '1', '2']);

      fixture.componentInstance.remove(1);
      fixture.detectChanges();
      tick();
      expect(getValues()).toEqual(['0', '2']);

      fixture.componentInstance.add(1);
      fixture.detectChanges();
      tick();
      expect(getValues()).toEqual(['0', '2', '3']);

      fixture.componentInstance.items[1].value = '1';
      fixture.detectChanges();
      tick();
      expect(getValues()).toEqual(['0', '1', '3']);

      fixture.componentInstance.items[2].value = '2';
      fixture.detectChanges();
      tick();
      expect(getValues()).toEqual(['0', '1', '2']);
    }));
  });

  describe('name and ngModelOptions', () => {
    it('should throw if ngModel has a parent form but no name attr or standalone label', () => {
      const fixture = initTest(InvalidNgModelNoName);
      expect(() => fixture.detectChanges()).toThrowError(new RegExp(`name attribute must be set`));
    });

    it('should not throw if ngModel has a parent form, no name attr, and a standalone label', () => {
      const fixture = initTest(NgModelOptionsStandalone);
      expect(() => fixture.detectChanges()).not.toThrow();
    });

    it('should not register standalone ngModels with parent form', fakeAsync(() => {
      const fixture = initTest(NgModelOptionsStandalone);
      fixture.componentInstance.one = 'some data';
      fixture.componentInstance.two = 'should not show';
      fixture.detectChanges();
      tick();

      const form = fixture.debugElement.children[0].injector.get(NgForm);
      const inputs = fixture.debugElement.queryAll(By.css('input'));
      tick();

      expect(form.value).toEqual({one: 'some data'});
      expect(inputs[1].nativeElement.value).toEqual('should not show');
    }));

    it('should override name attribute with ngModelOptions name if provided', fakeAsync(() => {
      const fixture = initTest(NgModelForm);
      fixture.componentInstance.options = {name: 'override'};
      fixture.componentInstance.name = 'some data';
      fixture.detectChanges();
      tick();

      const form = fixture.debugElement.children[0].injector.get(NgForm);
      expect(form.value).toEqual({override: 'some data'});
    }));
  });

  describe('updateOn', () => {
    describe('blur', () => {
      it('should default updateOn to change', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = '';
        fixture.componentInstance.options = {};
        fixture.detectChanges();
        tick();

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        const name = form.control.get('name') as FormControl;
        expect((name as any)._updateOn).toBeUndefined();
        expect(name.updateOn).toEqual('change');
      }));

      it('should set control updateOn to blur properly', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = '';
        fixture.componentInstance.options = {updateOn: 'blur'};
        fixture.detectChanges();
        tick();

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        const name = form.control.get('name') as FormControl;
        expect((name as any)._updateOn).toEqual('blur');
        expect(name.updateOn).toEqual('blur');
      }));

      it('should always set value and validity on init', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = 'Nancy Drew';
        fixture.componentInstance.options = {updateOn: 'blur'};
        fixture.detectChanges();
        tick();

        const input = fixture.debugElement.query(By.css('input')).nativeElement;
        const form = fixture.debugElement.children[0].injector.get(NgForm);
        expect(input.value)
          .withContext('Expected initial view value to be set.')
          .toEqual('Nancy Drew');
        expect(form.value).withContext('Expected initial control value be set.').toEqual({
          name: 'Nancy Drew',
        });
        expect(form.valid).withContext('Expected validation to run on initial value.').toBe(true);
      }));

      it('should always set value programmatically right away', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = 'Nancy Drew';
        fixture.componentInstance.options = {updateOn: 'blur'};
        fixture.detectChanges();
        tick();

        fixture.componentInstance.name = 'Carson';
        fixture.detectChanges();
        tick();

        const input = fixture.debugElement.query(By.css('input')).nativeElement;
        const form = fixture.debugElement.children[0].injector.get(NgForm);
        expect(input.value)
          .withContext('Expected view value to update on programmatic change.')
          .toEqual('Carson');
        expect(form.value).toEqual(
          {name: 'Carson'},
          'Expected form value to update on programmatic change.',
        );
        expect(form.valid)
          .withContext('Expected validation to run immediately on programmatic change.')
          .toBe(false);
      }));

      it('should update value/validity on blur', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = 'Carson';
        fixture.componentInstance.options = {updateOn: 'blur'};
        fixture.detectChanges();
        tick();

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

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        expect(fixture.componentInstance.name)
          .withContext('Expected value not to update on input.')
          .toEqual('Carson');
        expect(form.valid).withContext('Expected validation not to run on input.').toBe(false);

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

        expect(fixture.componentInstance.name)
          .withContext('Expected value to update on blur.')
          .toEqual('Nancy Drew');
        expect(form.valid).withContext('Expected validation to run on blur.').toBe(true);
      }));

      it('should wait for second blur to update value/validity again', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = 'Carson';
        fixture.componentInstance.options = {updateOn: 'blur'};
        fixture.detectChanges();
        tick();

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

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

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

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        expect(fixture.componentInstance.name)
          .withContext('Expected value not to update until another blur.')
          .toEqual('Nancy Drew');
        expect(form.valid)
          .withContext('Expected validation not to run until another blur.')
          .toBe(true);

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

        expect(fixture.componentInstance.name)
          .withContext('Expected value to update on second blur.')
          .toEqual('Carson');
        expect(form.valid).withContext('Expected validation to run on second blur.').toBe(false);
      }));

      it('should not update dirtiness until blur', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = '';
        fixture.componentInstance.options = {updateOn: 'blur'};
        fixture.detectChanges();
        tick();

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

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        expect(form.dirty).withContext('Expected dirtiness not to update on input.').toBe(false);

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

        expect(form.dirty).withContext('Expected dirtiness to update on blur.').toBe(true);
      }));

      it('should not update touched until blur', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = '';
        fixture.componentInstance.options = {updateOn: 'blur'};
        fixture.detectChanges();
        tick();

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

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        expect(form.touched).withContext('Expected touched not to update on input.').toBe(false);

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

        expect(form.touched).withContext('Expected touched to update on blur.').toBe(true);
      }));

      it('should not emit valueChanges or statusChanges until blur', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = '';
        fixture.componentInstance.options = {updateOn: 'blur'};
        fixture.detectChanges();
        tick();

        const values: any[] = [];
        const form = fixture.debugElement.children[0].injector.get(NgForm);

        const sub = merge(form.valueChanges!, form.statusChanges!).subscribe((val) =>
          values.push(val),
        );

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

        expect(values)
          .withContext('Expected no valueChanges or statusChanges on input.')
          .toEqual([]);

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

        expect(values).toEqual(
          [{name: 'Nancy Drew'}, 'VALID'],
          'Expected valueChanges and statusChanges on blur.',
        );

        sub.unsubscribe();
      }));

      it('should not fire ngModelChange event on blur unless value has changed', fakeAsync(() => {
        const fixture = initTest(NgModelChangesForm);
        fixture.componentInstance.name = 'Carson';
        fixture.componentInstance.options = {updateOn: 'blur'};
        fixture.detectChanges();
        tick();

        expect(fixture.componentInstance.events)
          .withContext('Expected ngModelChanges not to fire.')
          .toEqual([]);

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

        expect(fixture.componentInstance.events)
          .withContext('Expected ngModelChanges not to fire if value unchanged.')
          .toEqual([]);

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

        expect(fixture.componentInstance.events)
          .withContext('Expected ngModelChanges not to fire on input.')
          .toEqual([]);

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

        expect(fixture.componentInstance.events)
          .withContext('Expected ngModelChanges to fire once blurred if value changed.')
          .toEqual(['fired']);

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

        expect(fixture.componentInstance.events).toEqual(
          ['fired'],
          'Expected ngModelChanges not to fire again on blur unless value changed.',
        );

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

        expect(fixture.componentInstance.events)
          .withContext('Expected ngModelChanges not to fire on input after blur.')
          .toEqual(['fired']);

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

        expect(fixture.componentInstance.events).toEqual(
          ['fired', 'fired'],
          'Expected ngModelChanges to fire again on blur if value changed.',
        );
      }));
    });

    describe('submit', () => {
      it('should set control updateOn to submit properly', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = '';
        fixture.componentInstance.options = {updateOn: 'submit'};
        fixture.detectChanges();
        tick();

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        const name = form.control.get('name') as FormControl;
        expect((name as any)._updateOn).toEqual('submit');
        expect(name.updateOn).toEqual('submit');
      }));

      it('should always set value and validity on init', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = 'Nancy Drew';
        fixture.componentInstance.options = {updateOn: 'submit'};
        fixture.detectChanges();
        tick();

        const input = fixture.debugElement.query(By.css('input')).nativeElement;
        const form = fixture.debugElement.children[0].injector.get(NgForm);
        expect(input.value)
          .withContext('Expected initial view value to be set.')
          .toEqual('Nancy Drew');
        expect(form.value)
          .withContext('Expected initial control value be set.')
          .toEqual({name: 'Nancy Drew'});
        expect(form.valid).withContext('Expected validation to run on initial value.').toBe(true);
      }));

      it('should always set value programmatically right away', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = 'Nancy Drew';
        fixture.componentInstance.options = {updateOn: 'submit'};
        fixture.detectChanges();
        tick();

        fixture.componentInstance.name = 'Carson';
        fixture.detectChanges();
        tick();

        const input = fixture.debugElement.query(By.css('input')).nativeElement;
        const form = fixture.debugElement.children[0].injector.get(NgForm);
        expect(input.value)
          .withContext('Expected view value to update on programmatic change.')
          .toEqual('Carson');
        expect(form.value)
          .withContext('Expected form value to update on programmatic change.')
          .toEqual({name: 'Carson'});
        expect(form.valid)
          .withContext('Expected validation to run immediately on programmatic change.')
          .toBe(false);
      }));

      it('should update on submit', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = 'Carson';
        fixture.componentInstance.options = {updateOn: 'submit'};
        fixture.detectChanges();
        tick();

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

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        expect(fixture.componentInstance.name)
          .withContext('Expected value not to update on input.')
          .toEqual('Carson');
        expect(form.valid).withContext('Expected validation not to run on input.').toBe(false);

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

        expect(fixture.componentInstance.name)
          .withContext('Expected value not to update on blur.')
          .toEqual('Carson');
        expect(form.valid).withContext('Expected validation not to run on blur.').toBe(false);

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

        expect(fixture.componentInstance.name)
          .withContext('Expected value to update on submit.')
          .toEqual('Nancy Drew');
        expect(form.valid).withContext('Expected validation to run on submit.').toBe(true);
      }));

      it('should wait until second submit to update again', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = 'Carson';
        fixture.componentInstance.options = {updateOn: 'submit'};
        fixture.detectChanges();
        tick();

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

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

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

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        expect(fixture.componentInstance.name)
          .withContext('Expected value not to update until second submit.')
          .toEqual('Nancy Drew');
        expect(form.valid)
          .withContext('Expected validation not to run until second submit.')
          .toBe(true);

        dispatchEvent(formEl, 'submit');
        fixture.detectChanges();
        tick();

        expect(fixture.componentInstance.name)
          .withContext('Expected value to update on second submit.')
          .toEqual('Carson');
        expect(form.valid).withContext('Expected validation to run on second submit.').toBe(false);
      }));

      it('should not run validation for onChange controls on submit', fakeAsync(() => {
        const validatorSpy = jasmine.createSpy('validator');
        const groupValidatorSpy = jasmine.createSpy('groupValidatorSpy');

        const fixture = initTest(NgModelGroupForm);
        fixture.componentInstance.options = {updateOn: 'submit'};
        fixture.detectChanges();
        tick();

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        form.control.get('name')!.setValidators(groupValidatorSpy);
        form.control.get('name.last')!.setValidators(validatorSpy);

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

        expect(validatorSpy).not.toHaveBeenCalled();
        expect(groupValidatorSpy).not.toHaveBeenCalled();
      }));

      it('should not update dirtiness until submit', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = '';
        fixture.componentInstance.options = {updateOn: 'submit'};
        fixture.detectChanges();
        tick();

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

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        expect(form.dirty).withContext('Expected dirtiness not to update on input.').toBe(false);

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

        expect(form.dirty).withContext('Expected dirtiness not to update on blur.').toBe(false);

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

        expect(form.dirty).withContext('Expected dirtiness to update on submit.').toBe(true);
      }));

      it('should not update touched until submit', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = '';
        fixture.componentInstance.options = {updateOn: 'submit'};
        fixture.detectChanges();
        tick();

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

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

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        expect(form.touched).withContext('Expected touched not to update on blur.').toBe(false);

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

        expect(form.touched).withContext('Expected touched to update on submit.').toBe(true);
      }));

      it('should reset properly', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = 'Nancy' as string | null;
        fixture.componentInstance.options = {updateOn: 'submit'};
        fixture.detectChanges();
        tick();

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

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

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        form.resetForm();
        fixture.detectChanges();
        tick();

        expect(input.value).withContext('Expected view value to reset.').toEqual('');
        expect(form.value).withContext('Expected form value to reset.').toEqual({name: null});
        expect(fixture.componentInstance.name)
          .withContext('Expected ngModel value to reset.')
          .toEqual(null);
        expect(form.dirty).withContext('Expected dirty to stay false on reset.').toBe(false);
        expect(form.touched).withContext('Expected touched to stay false on reset.').toBe(false);

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

        expect(form.value).withContext('Expected form value to stay empty on submit').toEqual({
          name: null,
        });
        expect(fixture.componentInstance.name)
          .withContext('Expected ngModel value to stay empty on submit.')
          .toEqual(null);
        expect(form.dirty).withContext('Expected dirty to stay false on submit.').toBe(false);
        expect(form.touched).withContext('Expected touched to stay false on submit.').toBe(false);
      }));

      it('should not emit valueChanges or statusChanges until submit', fakeAsync(() => {
        const fixture = initTest(NgModelForm);
        fixture.componentInstance.name = '';
        fixture.componentInstance.options = {updateOn: 'submit'};
        fixture.detectChanges();
        tick();

        const values: any[] = [];
        const form = fixture.debugElement.children[0].injector.get(NgForm);

        const sub = merge(form.valueChanges!, form.statusChanges!).subscribe((val) =>
          values.push(val),
        );

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

        expect(values)
          .withContext('Expected no valueChanges or statusChanges on input.')
          .toEqual([]);

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

        expect(values)
          .withContext('Expected no valueChanges or statusChanges on blur.')
          .toEqual([]);

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

        expect(values).toEqual(
          [{name: 'Nancy Drew'}, 'VALID'],
          'Expected valueChanges and statusChanges on submit.',
        );
        sub.unsubscribe();
      }));

      it('should not fire ngModelChange event on submit unless value has changed', fakeAsync(() => {
        const fixture = initTest(NgModelChangesForm);
        fixture.componentInstance.name = 'Carson';
        fixture.componentInstance.options = {updateOn: 'submit'};
        fixture.detectChanges();
        tick();

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

        expect(fixture.componentInstance.events)
          .withContext('Expected ngModelChanges not to fire if value unchanged.')
          .toEqual([]);

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

        expect(fixture.componentInstance.events)
          .withContext('Expected ngModelChanges not to fire on input.')
          .toEqual([]);

        dispatchEvent(formEl, 'submit');
        fixture.detectChanges();

        expect(fixture.componentInstance.events)
          .withContext('Expected ngModelChanges to fire once submitted if value changed.')
          .toEqual(['fired']);

        dispatchEvent(formEl, 'submit');
        fixture.detectChanges();

        expect(fixture.componentInstance.events).toEqual(
          ['fired'],
          'Expected ngModelChanges not to fire again on submit unless value changed.',
        );

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

        expect(fixture.componentInstance.events)
          .withContext('Expected ngModelChanges not to fire on input after submit.')
          .toEqual(['fired']);

        dispatchEvent(formEl, 'submit');
        fixture.detectChanges();

        expect(fixture.componentInstance.events).toEqual(
          ['fired', 'fired'],
          'Expected ngModelChanges to fire again on submit if value changed.',
        );
      }));

      it('should not prevent the default action on forms with method="dialog"', fakeAsync(() => {
        if (typeof HTMLDialogElement === 'undefined') {
          return;
        }

        const fixture = initTest(NativeDialogForm);
        fixture.detectChanges();
        tick();
        const event = dispatchEvent(fixture.componentInstance.form.nativeElement, 'submit');
        fixture.detectChanges();

        expect(event.defaultPrevented).toBe(false);
      }));
    });

    describe('ngFormOptions', () => {
      it('should use ngFormOptions value when ngModelOptions are not set', fakeAsync(() => {
        const fixture = initTest(NgModelOptionsStandalone);
        fixture.componentInstance.options = {name: 'two'};
        fixture.componentInstance.formOptions = {updateOn: 'blur'};
        fixture.detectChanges();
        tick();

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        const controlOne = form.control.get('one')! as FormControl;
        expect((controlOne as any)._updateOn).toBeUndefined();
        expect(controlOne.updateOn)
          .withContext('Expected first control to inherit updateOn from parent form.')
          .toEqual('blur');

        const controlTwo = form.control.get('two')! as FormControl;
        expect((controlTwo as any)._updateOn).toBeUndefined();
        expect(controlTwo.updateOn)
          .withContext('Expected last control to inherit updateOn from parent form.')
          .toEqual('blur');
      }));

      it('should actually update using ngFormOptions value', fakeAsync(() => {
        const fixture = initTest(NgModelOptionsStandalone);
        fixture.componentInstance.one = '';
        fixture.componentInstance.formOptions = {updateOn: 'blur'};
        fixture.detectChanges();
        tick();

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

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        expect(form.value).withContext('Expected value not to update on input.').toEqual({
          one: '',
        });

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

        expect(form.value).withContext('Expected value to update on blur.').toEqual({
          one: 'Nancy Drew',
        });
      }));

      it('should allow ngModelOptions updateOn to override ngFormOptions', fakeAsync(() => {
        const fixture = initTest(NgModelOptionsStandalone);
        fixture.componentInstance.options = {updateOn: 'blur', name: 'two'};
        fixture.componentInstance.formOptions = {updateOn: 'change'};
        fixture.detectChanges();
        tick();

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        const controlOne = form.control.get('one')! as FormControl;
        expect((controlOne as any)._updateOn).toBeUndefined();
        expect(controlOne.updateOn)
          .withContext('Expected control updateOn to inherit form updateOn.')
          .toEqual('change');

        const controlTwo = form.control.get('two')! as FormControl;
        expect((controlTwo as any)._updateOn)
          .withContext('Expected control to set blur override.')
          .toEqual('blur');
        expect(controlTwo.updateOn)
          .withContext('Expected control updateOn to override form updateOn.')
          .toEqual('blur');
      }));

      it('should update using ngModelOptions override', fakeAsync(() => {
        const fixture = initTest(NgModelOptionsStandalone);
        fixture.componentInstance.one = '';
        fixture.componentInstance.two = '';
        fixture.componentInstance.options = {updateOn: 'blur', name: 'two'};
        fixture.componentInstance.formOptions = {updateOn: 'change'};
        fixture.detectChanges();
        tick();

        const [inputOne, inputTwo] = fixture.debugElement.queryAll(By.css('input'));
        inputOne.nativeElement.value = 'Nancy Drew';
        dispatchEvent(inputOne.nativeElement, 'input');
        fixture.detectChanges();

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        expect(form.value).withContext('Expected first value to update on input.').toEqual({
          one: 'Nancy Drew',
          two: '',
        });

        inputTwo.nativeElement.value = 'Carson Drew';
        dispatchEvent(inputTwo.nativeElement, 'input');
        fixture.detectChanges();
        tick();

        expect(form.value).withContext('Expected second value not to update on input.').toEqual({
          one: 'Nancy Drew',
          two: '',
        });

        dispatchEvent(inputTwo.nativeElement, 'blur');
        fixture.detectChanges();

        expect(form.value).toEqual(
          {one: 'Nancy Drew', two: 'Carson Drew'},
          'Expected second value to update on blur.',
        );
      }));

      it('should not use ngFormOptions for standalone ngModels', fakeAsync(() => {
        const fixture = initTest(NgModelOptionsStandalone);
        fixture.componentInstance.two = '';
        fixture.componentInstance.options = {standalone: true};
        fixture.componentInstance.formOptions = {updateOn: 'blur'};
        fixture.detectChanges();
        tick();

        const inputTwo = fixture.debugElement.queryAll(By.css('input'))[1].nativeElement;
        inputTwo.value = 'Nancy Drew';
        dispatchEvent(inputTwo, 'input');
        fixture.detectChanges();

        expect(fixture.componentInstance.two)
          .withContext('Expected standalone ngModel not to inherit blur update.')
          .toEqual('Nancy Drew');
      }));
    });
  });

  describe('submit and reset events', () => {
    it('should emit ngSubmit event with the original submit event on submit', fakeAsync(() => {
      const fixture = initTest(NgModelForm);
      fixture.componentInstance.event = null!;

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

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

    it('should mark NgForm as submitted on submit event', fakeAsync(() => {
      const fixture = initTest(NgModelForm);

      tick();
      const form = fixture.debugElement.children[0].injector.get(NgForm);
      expect(form.submitted).toBe(false);

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

      expect(form.submitted).toBe(true);
    }));

    it('should reset the form to empty when reset event is fired', fakeAsync(() => {
      const fixture = initTest(NgModelForm);
      fixture.componentInstance.name = 'should be cleared' as string | null;
      fixture.detectChanges();
      tick();

      const form = fixture.debugElement.children[0].injector.get(NgForm);
      const formEl = fixture.debugElement.query(By.css('form'));
      const input = fixture.debugElement.query(By.css('input'));

      expect(input.nativeElement.value).toBe('should be cleared'); // view value
      expect(fixture.componentInstance.name).toBe('should be cleared'); // ngModel value
      expect(form.value.name).toEqual('should be cleared'); // control value

      dispatchEvent(formEl.nativeElement, 'reset');
      fixture.detectChanges();
      tick();

      expect(input.nativeElement.value).toBe(''); // view value
      expect(fixture.componentInstance.name).toBe(null); // ngModel value
      expect(form.value.name).toEqual(null); // control value
    }));

    it('should reset the form submit state when reset button is clicked', fakeAsync(() => {
      const fixture = initTest(NgModelForm);
      const form = fixture.debugElement.children[0].injector.get(NgForm);
      const formEl = fixture.debugElement.query(By.css('form'));

      dispatchEvent(formEl.nativeElement, 'submit');
      fixture.detectChanges();
      tick();
      expect(form.submitted).toBe(true);

      dispatchEvent(formEl.nativeElement, 'reset');
      fixture.detectChanges();
      tick();
      expect(form.submitted).toBe(false);
    }));
  });

  describe('valueChange and statusChange events', () => {
    it('should emit valueChanges and statusChanges on init', fakeAsync(() => {
      const fixture = initTest(NgModelForm);
      const form = fixture.debugElement.children[0].injector.get(NgForm);
      fixture.componentInstance.name = 'aa';
      fixture.detectChanges();

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

      let formValidity: string = undefined!;
      let formValue: Object = undefined!;

      form.statusChanges!.subscribe((status: string) => (formValidity = status));
      form.valueChanges!.subscribe((value: string) => (formValue = value));

      tick();

      expect(formValidity).toEqual('INVALID');
      expect(formValue).toEqual({name: 'aa'});
    }));

    it('should mark controls dirty before emitting the value change event', fakeAsync(() => {
      const fixture = initTest(NgModelForm);
      const form = fixture.debugElement.children[0].injector.get(NgForm).form;

      fixture.detectChanges();
      tick();

      form.get('name')!.valueChanges.subscribe(() => {
        expect(form.get('name')!.dirty).toBe(true);
      });

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

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

    it('should mark controls pristine before emitting the value change event when resetting ', fakeAsync(() => {
      const fixture = initTest(NgModelForm);
      fixture.detectChanges();
      tick();

      const form = fixture.debugElement.children[0].injector.get(NgForm).form;
      const formEl = fixture.debugElement.query(By.css('form')).nativeElement;
      const inputEl = fixture.debugElement.query(By.css('input')).nativeElement;

      inputEl.value = 'newValue';
      dispatchEvent(inputEl, 'input');

      expect(form.get('name')!.pristine).toBe(false);

      form.get('name')!.valueChanges.subscribe(() => {
        expect(form.get('name')!.pristine).toBe(true);
      });

      dispatchEvent(formEl, 'reset');
    }));
  });

  describe('disabled controls', () => {
    it('should not consider disabled controls in value or validation', fakeAsync(() => {
      const fixture = initTest(NgModelGroupForm);
      fixture.componentInstance.isDisabled = false;
      fixture.componentInstance.first = '';
      fixture.componentInstance.last = 'Drew';
      fixture.componentInstance.email = 'some email';
      fixture.detectChanges();
      tick();

      const form = fixture.debugElement.children[0].injector.get(NgForm);
      expect(form.value).toEqual({name: {first: '', last: 'Drew'}, email: 'some email'});
      expect(form.valid).toBe(false);
      expect(form.control.get('name.first')!.disabled).toBe(false);

      fixture.componentInstance.isDisabled = true;
      fixture.detectChanges();
      tick();

      expect(form.value).toEqual({name: {last: 'Drew'}, email: 'some email'});
      expect(form.valid).toBe(true);
      expect(form.control.get('name.first')!.disabled).toBe(true);
    }));

    it('should add disabled attribute in the UI if disable() is called programmatically', fakeAsync(() => {
      const fixture = initTest(NgModelGroupForm);
      fixture.componentInstance.isDisabled = false;
      fixture.componentInstance.first = 'Nancy';
      fixture.detectChanges();
      tick();

      const form = fixture.debugElement.children[0].injector.get(NgForm);
      form.control.get('name.first')!.disable();
      fixture.detectChanges();
      tick();

      const input = fixture.debugElement.query(By.css(`[name="first"]`));
      expect(input.nativeElement.disabled).toBe(true);
    }));

    it('should disable a custom control if disabled attr is added', waitForAsync(() => {
      const fixture = initTest(NgModelCustomWrapper, NgModelCustomComp);
      fixture.componentInstance.name = 'Nancy';
      fixture.componentInstance.isDisabled = true;
      fixture.detectChanges();
      fixture.whenStable().then(() => {
        fixture.detectChanges();
        fixture.whenStable().then(() => {
          const form = fixture.debugElement.children[0].injector.get(NgForm);
          expect(form.control.get('name')!.disabled).toBe(true);

          const customInput = fixture.debugElement.query(By.css('[name="custom"]'));
          expect(customInput.nativeElement.disabled).toEqual(true);
        });
      });
    }));

    it('should disable a control with unbound disabled attr', fakeAsync(() => {
      TestBed.overrideComponent(NgModelForm, {
        set: {
          template: `
            <form>
             <input name="name" [(ngModel)]="name" disabled>
            </form>
          `,
        },
      });
      const fixture = initTest(NgModelForm);
      fixture.detectChanges();
      tick();
      const form = fixture.debugElement.children[0].injector.get(NgForm);
      expect(form.control.get('name')!.disabled).toBe(true);

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

      form.control.enable();
      fixture.detectChanges();
      tick();
      expect(input.nativeElement.disabled).toEqual(false);
    }));
  });

  describe('validation directives', () => {
    it('required validator should validate checkbox', fakeAsync(() => {
      const fixture = initTest(NgModelCheckboxRequiredValidator);
      fixture.detectChanges();
      tick();

      const control = fixture.debugElement.children[0].injector
        .get(NgForm)
        .control.get('checkbox')!;

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

      fixture.componentInstance.required = true;
      fixture.detectChanges();
      tick();

      expect(input.nativeElement.checked).toBe(false);
      expect(control.hasError('required')).toBe(true);

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

      expect(input.nativeElement.checked).toBe(true);
      expect(control.hasError('required')).toBe(false);

      input.nativeElement.checked = false;
      dispatchEvent(input.nativeElement, 'change');
      fixture.detectChanges();
      tick();

      expect(input.nativeElement.checked).toBe(false);
      expect(control.hasError('required')).toBe(true);

      fixture.componentInstance.required = false;
      dispatchEvent(input.nativeElement, 'change');
      fixture.detectChanges();
      tick();

      expect(input.nativeElement.checked).toBe(false);
      expect(control.hasError('required')).toBe(false);
    }));

    it('should validate email', fakeAsync(() => {
      const fixture = initTest(NgModelEmailValidator);
      fixture.detectChanges();
      tick();

      const control = fixture.debugElement.children[0].injector.get(NgForm).control.get('email')!;

      const input = fixture.debugElement.query(By.css('input'));
      expect(control.hasError('email')).toBe(false);

      fixture.componentInstance.validatorEnabled = true;
      fixture.detectChanges();
      tick();

      expect(input.nativeElement.value).toEqual('');
      expect(control.hasError('email')).toBe(false);

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

      expect(input.nativeElement.value).toEqual('@');
      expect(control.hasError('email')).toBe(true);

      input.nativeElement.value = 'test@gmail.com';
      dispatchEvent(input.nativeElement, 'input');
      fixture.detectChanges();
      tick();

      expect(input.nativeElement.value).toEqual('test@gmail.com');
      expect(control.hasError('email')).toBe(false);

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

      expect(input.nativeElement.value).toEqual('text');
      expect(control.hasError('email')).toBe(true);
    }));

    it('should support dir validators using bindings', fakeAsync(() => {
      const fixture = initTest(NgModelValidationBindings);
      fixture.componentInstance.required = true;
      fixture.componentInstance.minLen = 3;
      fixture.componentInstance.maxLen = 3;
      fixture.componentInstance.pattern = '.{3,}';
      fixture.detectChanges();
      tick();

      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');
      fixture.detectChanges();

      const form = fixture.debugElement.children[0].injector.get(NgForm);
      expect(form.control.hasError('required', ['required'])).toEqual(true);
      expect(form.control.hasError('minlength', ['minlength'])).toEqual(true);
      expect(form.control.hasError('maxlength', ['maxlength'])).toEqual(true);
      expect(form.control.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('should support optional fields with string pattern validator', fakeAsync(() => {
      const fixture = initTest(NgModelMultipleValidators);
      fixture.componentInstance.required = false;
      fixture.componentInstance.pattern = '[a-z]+';
      fixture.detectChanges();
      tick();

      const form = fixture.debugElement.children[0].injector.get(NgForm);
      const input = fixture.debugElement.query(By.css('input'));

      input.nativeElement.value = '';
      dispatchEvent(input.nativeElement, 'input');
      fixture.detectChanges();
      expect(form.valid).toBeTruthy();

      input.nativeElement.value = '1';
      dispatchEvent(input.nativeElement, 'input');
      fixture.detectChanges();
      expect(form.valid).toBeFalsy();
      expect(form.control.hasError('pattern', ['tovalidate'])).toBeTruthy();
    }));

    it('should support optional fields with RegExp pattern validator', fakeAsync(() => {
      const fixture = initTest(NgModelMultipleValidators);
      fixture.componentInstance.required = false;
      fixture.componentInstance.pattern = /^[a-z]+$/;
      fixture.detectChanges();
      tick();

      const form = fixture.debugElement.children[0].injector.get(NgForm);
      const input = fixture.debugElement.query(By.css('input'));

      input.nativeElement.value = '';
      dispatchEvent(input.nativeElement, 'input');
      fixture.detectChanges();
      expect(form.valid).toBeTruthy();

      input.nativeElement.value = '1';
      dispatchEvent(input.nativeElement, 'input');
      fixture.detectChanges();
      expect(form.valid).toBeFalsy();
      expect(form.control.hasError('pattern', ['tovalidate'])).toBeTruthy();
    }));

    it('should support optional fields with minlength validator', fakeAsync(() => {
      const fixture = initTest(NgModelMultipleValidators);
      fixture.componentInstance.required = false;
      fixture.componentInstance.minLen = 2;
      fixture.detectChanges();
      tick();

      const form = fixture.debugElement.children[0].injector.get(NgForm);
      const input = fixture.debugElement.query(By.css('input'));

      input.nativeElement.value = '';
      dispatchEvent(input.nativeElement, 'input');
      fixture.detectChanges();
      expect(form.valid).toBeTruthy();

      input.nativeElement.value = '1';
      dispatchEvent(input.nativeElement, 'input');
      fixture.detectChanges();
      expect(form.valid).toBeFalsy();
      expect(form.control.hasError('minlength', ['tovalidate'])).toBeTruthy();
    }));

    it('changes on bound properties should change the validation state of the form', fakeAsync(() => {
      const fixture = initTest(NgModelValidationBindings);
      fixture.detectChanges();
      tick();

      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');

      const form = fixture.debugElement.children[0].injector.get(NgForm);
      expect(form.control.hasError('required', ['required'])).toEqual(false);
      expect(form.control.hasError('minlength', ['minlength'])).toEqual(false);
      expect(form.control.hasError('maxlength', ['maxlength'])).toEqual(false);
      expect(form.control.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.control.hasError('required', ['required'])).toEqual(true);
      expect(form.control.hasError('minlength', ['minlength'])).toEqual(true);
      expect(form.control.hasError('maxlength', ['maxlength'])).toEqual(true);
      expect(form.control.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.control.hasError('required', ['required'])).toEqual(false);
      expect(form.control.hasError('minlength', ['minlength'])).toEqual(false);
      expect(form.control.hasError('maxlength', ['maxlength'])).toEqual(false);
      expect(form.control.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 update control status', fakeAsync(() => {
      const fixture = initTest(NgModelChangeState);
      const inputEl = fixture.debugElement.query(By.css('input'));
      const inputNativeEl = inputEl.nativeElement;
      const onNgModelChange = jasmine.createSpy('onNgModelChange');
      fixture.componentInstance.onNgModelChange = onNgModelChange;
      fixture.detectChanges();
      tick();

      expect(onNgModelChange).not.toHaveBeenCalled();

      inputNativeEl.value = 'updated';
      onNgModelChange.and.callFake((ngModel: NgModel) => {
        expect(ngModel.invalid).toBe(true);
        expect(ngModel.value).toBe('updated');
      });
      dispatchEvent(inputNativeEl, 'input');
      expect(onNgModelChange).toHaveBeenCalled();
      tick();

      inputNativeEl.value = '333';
      onNgModelChange.and.callFake((ngModel: NgModel) => {
        expect(ngModel.invalid).toBe(false);
        expect(ngModel.value).toBe('333');
      });
      dispatchEvent(inputNativeEl, 'input');
      expect(onNgModelChange).toHaveBeenCalledTimes(2);
      tick();
    }));

    it('should validate max', fakeAsync(() => {
      const fixture = initTest(NgModelMaxValidator);
      fixture.componentInstance.max = 10;
      fixture.detectChanges();
      tick();

      const input = fixture.debugElement.query(By.css('input')).nativeElement;
      const form = fixture.debugElement.children[0].injector.get(NgForm);

      input.value = '';
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(input.getAttribute('max')).toEqual('10');
      expect(form.valid).toEqual(true);
      expect(form.controls['max'].errors).toBeNull();

      input.value = 11;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(false);
      expect(form.controls['max'].errors).toEqual({max: {max: 10, actual: 11}});

      input.value = 9;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['max'].errors).toBeNull();

      fixture.componentInstance.max = 0;
      fixture.detectChanges();
      tick();
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(input.getAttribute('max')).toEqual('0');
      expect(form.valid).toEqual(false);
      expect(form.controls['max'].errors).toEqual({max: {max: 0, actual: 9}});

      input.value = 0;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['max'].errors).toBeNull();
    }));

    it('should validate max for float number', fakeAsync(() => {
      const fixture = initTest(NgModelMaxValidator);
      fixture.componentInstance.max = 10.25;
      fixture.detectChanges();
      tick();

      const input = fixture.debugElement.query(By.css('input')).nativeElement;
      const form = fixture.debugElement.children[0].injector.get(NgForm);

      input.value = '';
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(input.getAttribute('max')).toEqual('10.25');
      expect(form.valid).toEqual(true);
      expect(form.controls['max'].errors).toBeNull();

      input.value = 10.25;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['max'].errors).toBeNull();

      input.value = 10.15;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['max'].errors).toBeNull();

      input.value = 10.35;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(false);
      expect(form.controls['max'].errors).toEqual({max: {max: 10.25, actual: 10.35}});
    }));

    it('should apply max validation when control value is defined as a string', fakeAsync(() => {
      const fixture = initTest(NgModelMaxValidator);
      fixture.componentInstance.max = 10;
      fixture.detectChanges();
      tick();

      const input = fixture.debugElement.query(By.css('input')).nativeElement;
      const form = fixture.debugElement.children[0].injector.get(NgForm);

      input.value = '11';
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(input.getAttribute('max')).toEqual('10');
      expect(form.valid).toEqual(false);
      expect(form.controls['max'].errors).toEqual({max: {max: 10, actual: 11}});

      input.value = '9';
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['max'].errors).toBeNull();
    }));

    it('should re-validate if max changes', fakeAsync(() => {
      const fixture = initTest(NgModelMaxValidator);
      fixture.componentInstance.max = 10;
      fixture.detectChanges();
      tick();

      const input = fixture.debugElement.query(By.css('input')).nativeElement;
      const form = fixture.debugElement.children[0].injector.get(NgForm);

      input.value = 11;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(false);
      expect(form.controls['max'].errors).toEqual({max: {max: 10, actual: 11}});

      input.value = 9;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['max'].errors).toBeNull();

      fixture.componentInstance.max = 5;
      fixture.detectChanges();
      expect(form.valid).toEqual(false);
      expect(form.controls['max'].errors).toEqual({max: {max: 5, actual: 9}});
    }));

    it('should validate min', fakeAsync(() => {
      const fixture = initTest(NgModelMinValidator);
      fixture.componentInstance.min = 10;
      fixture.detectChanges();
      tick();

      const input = fixture.debugElement.query(By.css('input')).nativeElement;
      const form = fixture.debugElement.children[0].injector.get(NgForm);

      input.value = '';
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(input.getAttribute('min')).toEqual('10');
      expect(form.valid).toEqual(true);
      expect(form.controls['min'].errors).toBeNull();

      input.value = 11;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['min'].errors).toBeNull();

      input.value = 9;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(false);
      expect(form.controls['min'].errors).toEqual({min: {min: 10, actual: 9}});

      fixture.componentInstance.min = 0;
      fixture.detectChanges();
      tick();
      input.value = -5;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(input.getAttribute('min')).toEqual('0');
      expect(form.valid).toEqual(false);
      expect(form.controls['min'].errors).toEqual({min: {min: 0, actual: -5}});

      input.value = 0;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['min'].errors).toBeNull();
    }));

    it('should validate min for float number', fakeAsync(() => {
      const fixture = initTest(NgModelMinValidator);
      fixture.componentInstance.min = 10.25;
      fixture.detectChanges();
      tick();

      const input = fixture.debugElement.query(By.css('input')).nativeElement;
      const form = fixture.debugElement.children[0].injector.get(NgForm);

      input.value = '';
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(input.getAttribute('min')).toEqual('10.25');
      expect(form.valid).toEqual(true);
      expect(form.controls['min'].errors).toBeNull();

      input.value = 10.35;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['min'].errors).toBeNull();

      input.value = 10.25;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['min'].errors).toBeNull();

      input.value = 10.15;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(false);
      expect(form.controls['min'].errors).toEqual({min: {min: 10.25, actual: 10.15}});
    }));
    it('should apply min validation when control value is defined as a string', fakeAsync(() => {
      const fixture = initTest(NgModelMinValidator);
      fixture.componentInstance.min = 10;
      fixture.detectChanges();
      tick();

      const input = fixture.debugElement.query(By.css('input')).nativeElement;
      const form = fixture.debugElement.children[0].injector.get(NgForm);

      input.value = '11';
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(input.getAttribute('min')).toEqual('10');
      expect(form.valid).toEqual(true);
      expect(form.controls['min'].errors).toBeNull();

      input.value = '9';
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(false);
      expect(form.controls['min'].errors).toEqual({min: {min: 10, actual: 9}});
    }));

    it('should re-validate if min changes', fakeAsync(() => {
      const fixture = initTest(NgModelMinValidator);
      fixture.componentInstance.min = 10;
      fixture.detectChanges();
      tick();

      const input = fixture.debugElement.query(By.css('input')).nativeElement;
      const form = fixture.debugElement.children[0].injector.get(NgForm);

      input.value = 11;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['min'].errors).toBeNull();

      input.value = 9;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(false);
      expect(form.controls['min'].errors).toEqual({min: {min: 10, actual: 9}});

      fixture.componentInstance.min = 9;
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['min'].errors).toBeNull();
    }));

    it('should not include the min and max validators when using another directive with the same properties', fakeAsync(() => {
      const fixture = initTest(NgModelNoMinMaxValidator);
      const validateFnSpy = spyOn(MaxValidator.prototype, 'validate');

      fixture.componentInstance.min = 10;
      fixture.componentInstance.max = 20;
      fixture.detectChanges();
      tick();

      const min = fixture.debugElement.query(By.directive(MinValidator));
      expect(min).toBeNull();

      const max = fixture.debugElement.query(By.directive(MaxValidator));
      expect(max).toBeNull();

      const cd = fixture.debugElement.query(By.directive(CustomDirective));
      expect(cd).toBeDefined();

      expect(validateFnSpy).not.toHaveBeenCalled();
    }));

    it('should not include the min and max validators when using a custom component with the same properties', fakeAsync(() => {
      @Directive({
        selector: 'my-custom-component',
        providers: [
          {
            provide: NG_VALUE_ACCESSOR,
            multi: true,
            useExisting: forwardRef(() => MyCustomComponentDirective),
          },
        ],
      })
      class MyCustomComponentDirective implements ControlValueAccessor {
        @Input() min!: number;
        @Input() max!: number;

        writeValue(obj: any): void {}
        registerOnChange(fn: any): void {}
        registerOnTouched(fn: any): void {}
      }

      @Component({
        template: `
              <!-- no min/max validators should be matched on these elements -->
              <my-custom-component name="min" ngModel [min]="min"></my-custom-component>
              <my-custom-component name="max" ngModel [max]="max"></my-custom-component>
            `,
      })
      class AppComponent {}

      const fixture = initTest(AppComponent, MyCustomComponentDirective);
      const validateFnSpy = spyOn(MaxValidator.prototype, 'validate');

      fixture.detectChanges();
      tick();

      const mv = fixture.debugElement.query(By.directive(MaxValidator));
      expect(mv).toBeNull();

      const cd = fixture.debugElement.query(By.directive(CustomDirective));
      expect(cd).toBeDefined();

      expect(validateFnSpy).not.toHaveBeenCalled();
    }));

    it('should not include the min and max validators for inputs with type range', fakeAsync(() => {
      @Component({template: '<input type="range" min="10" max="20">'})
      class AppComponent {}

      const fixture = initTest(AppComponent);
      const maxValidateFnSpy = spyOn(MaxValidator.prototype, 'validate');
      const minValidateFnSpy = spyOn(MinValidator.prototype, 'validate');

      fixture.detectChanges();
      tick();

      const maxValidator = fixture.debugElement.query(By.directive(MaxValidator));
      expect(maxValidator).toBeNull();

      const minValidator = fixture.debugElement.query(By.directive(MinValidator));
      expect(minValidator).toBeNull();

      expect(maxValidateFnSpy).not.toHaveBeenCalled();
      expect(minValidateFnSpy).not.toHaveBeenCalled();
    }));

    describe('enabling validators conditionally', () => {
      it('should not include the minLength and maxLength validators for null', fakeAsync(() => {
        @Component({
          template:
            '<form><input name="amount" ngModel [minlength]="minlen" [maxlength]="maxlen"></form>',
        })
        class MinLengthMaxLengthComponent {
          minlen: number | null = null;
          maxlen: number | null = null;
          control!: FormControl;
        }

        const fixture = initTest(MinLengthMaxLengthComponent);
        fixture.detectChanges();
        tick();
        const input = fixture.debugElement.query(By.css('input')).nativeElement;

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        const control = fixture.debugElement.children[0].injector
          .get(NgForm)
          .control.get('amount')!;

        interface minmax {
          minlength: number | null;
          maxlength: number | null;
        }

        interface state {
          isValid: boolean;
          failedValidator?: string;
        }

        const setInputValue = (value: number) => {
          input.value = value;
          dispatchEvent(input, 'input');
          fixture.detectChanges();
        };
        const verifyValidatorAttrValues = (values: {minlength: any; maxlength: any}) => {
          expect(input.getAttribute('minlength')).toBe(values.minlength);
          expect(input.getAttribute('maxlength')).toBe(values.maxlength);
        };
        const setValidatorValues = (values: minmax) => {
          fixture.componentInstance.minlen = values.minlength;
          fixture.componentInstance.maxlen = values.maxlength;
          fixture.detectChanges();
        };
        const verifyFormState = (state: state) => {
          expect(form.valid).toBe(state.isValid);
          if (state.failedValidator) {
            expect(control!.hasError('minlength')).toEqual(state.failedValidator === 'minlength');
            expect(control!.hasError('maxlength')).toEqual(state.failedValidator === 'maxlength');
          }
        };

        ////////// Actual test scenarios start below //////////
        // 1. Verify that validators are disabled when input is `null`.
        verifyValidatorAttrValues({minlength: null, maxlength: null});
        verifyValidatorAttrValues({minlength: null, maxlength: null});

        // 2. Verify that setting validator inputs (to a value different from `null`) activate
        // validators.
        setInputValue(12345);
        setValidatorValues({minlength: 2, maxlength: 4});
        verifyValidatorAttrValues({minlength: '2', maxlength: '4'});
        verifyFormState({isValid: false, failedValidator: 'maxlength'});

        // 3. Changing value to the valid range should make the form valid.
        setInputValue(123);
        verifyFormState({isValid: true});

        // 4. Changing value to trigger `minlength` validator.
        setInputValue(1);
        verifyFormState({isValid: false, failedValidator: 'minlength'});

        // 5. Changing validator inputs to verify that attribute values are updated (and the
        // form is now valid).
        setInputValue(1);
        setValidatorValues({minlength: 1, maxlength: 5});
        verifyValidatorAttrValues({minlength: '1', maxlength: '5'});
        verifyFormState({isValid: true});

        // 6. Reset validator inputs back to `null` should deactivate validators.
        setInputValue(123);
        setValidatorValues({minlength: null, maxlength: null});
        verifyValidatorAttrValues({minlength: null, maxlength: null});
        verifyFormState({isValid: true});
      }));

      it('should not include the min and max validators for null', fakeAsync(() => {
        @Component({
          template:
            '<form><input type="number" name="minmaxinput" ngModel [min]="minlen" [max]="maxlen"></form>',
        })
        class MinLengthMaxLengthComponent {
          minlen: number | null = null;
          maxlen: number | null = null;
          control!: FormControl;
        }

        const fixture = initTest(MinLengthMaxLengthComponent);
        fixture.detectChanges();
        tick();
        const input = fixture.debugElement.query(By.css('input')).nativeElement;

        const form = fixture.debugElement.children[0].injector.get(NgForm);
        const control = fixture.debugElement.children[0].injector
          .get(NgForm)
          .control.get('minmaxinput')!;

        interface minmax {
          min: number | null;
          max: number | null;
        }

        interface state {
          isValid: boolean;
          failedValidator?: string;
        }

        const setInputValue = (value: number) => {
          input.value = value;
          dispatchEvent(input, 'input');
          fixture.detectChanges();
        };
        const verifyValidatorAttrValues = (values: {min: any; max: any}) => {
          expect(input.getAttribute('min')).toBe(values.min);
          expect(input.getAttribute('max')).toBe(values.max);
        };
        const setValidatorValues = (values: minmax) => {
          fixture.componentInstance.minlen = values.min;
          fixture.componentInstance.maxlen = values.max;
          fixture.detectChanges();
        };
        const verifyFormState = (state: state) => {
          expect(form.valid).toBe(state.isValid);
          if (state.failedValidator) {
            expect(control!.hasError('min')).toEqual(state.failedValidator === 'min');
            expect(control!.hasError('max')).toEqual(state.failedValidator === 'max');
          }
        };

        ////////// Actual test scenarios start below //////////
        // 1. Verify that validators are disabled when input is `null`.
        verifyValidatorAttrValues({min: null, max: null});
        verifyValidatorAttrValues({min: null, max: null});

        // 2. Verify that setting validator inputs (to a value different from `null`) activate
        // validators.
        setInputValue(12345);
        setValidatorValues({min: 2, max: 4});
        verifyValidatorAttrValues({min: '2', max: '4'});
        verifyFormState({isValid: false, failedValidator: 'max'});

        // 3. Changing value to the valid range should make the form valid.
        setInputValue(3);
        verifyFormState({isValid: true});

        // 4. Changing value to trigger `minlength` validator.
        setInputValue(1);
        verifyFormState({isValid: false, failedValidator: 'min'});

        // 5. Changing validator inputs to verify that attribute values are updated (and the
        // form is now valid).
        setInputValue(1);
        setValidatorValues({min: 1, max: 5});
        verifyValidatorAttrValues({min: '1', max: '5'});
        verifyFormState({isValid: true});

        // 6. Reset validator inputs back to `null` should deactivate validators.
        setInputValue(123);
        setValidatorValues({min: null, max: null});
        verifyValidatorAttrValues({min: null, max: null});
        verifyFormState({isValid: true});
      }));
    });

    ['number', 'string'].forEach((inputType: string) => {
      it(`should validate min and max when constraints are represented using a ${inputType}`, fakeAsync(() => {
        const fixture = initTest(NgModelMinMaxValidator);

        fixture.componentInstance.min = inputType === 'string' ? '5' : 5;
        fixture.componentInstance.max = inputType === 'string' ? '10' : 10;

        fixture.detectChanges();
        tick();

        const input = fixture.debugElement.query(By.css('input')).nativeElement;
        const form = fixture.debugElement.children[0].injector.get(NgForm);

        input.value = '';
        dispatchEvent(input, 'input');
        fixture.detectChanges();
        expect(form.valid).toEqual(true);
        expect(form.controls['min_max'].errors).toBeNull();

        input.value = 11;
        dispatchEvent(input, 'input');
        fixture.detectChanges();
        expect(form.valid).toEqual(false);
        expect(form.controls['min_max'].errors).toEqual({max: {max: 10, actual: 11}});

        input.value = 4;
        dispatchEvent(input, 'input');
        fixture.detectChanges();
        expect(form.valid).toEqual(false);
        expect(form.controls['min_max'].errors).toEqual({min: {min: 5, actual: 4}});

        input.value = 9;
        dispatchEvent(input, 'input');
        fixture.detectChanges();
        expect(form.valid).toEqual(true);
        expect(form.controls['min_max'].errors).toBeNull();
      }));
    });
    it('should validate min and max', fakeAsync(() => {
      const fixture = initTest(NgModelMinMaxValidator);
      fixture.componentInstance.min = 5;
      fixture.componentInstance.max = 10;
      fixture.detectChanges();
      tick();

      const input = fixture.debugElement.query(By.css('input')).nativeElement;
      const form = fixture.debugElement.children[0].injector.get(NgForm);

      input.value = '';
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['min_max'].errors).toBeNull();

      input.value = 11;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(false);
      expect(form.controls['min_max'].errors).toEqual({max: {max: 10, actual: 11}});

      input.value = 4;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(false);
      expect(form.controls['min_max'].errors).toEqual({min: {min: 5, actual: 4}});

      input.value = 9;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['min_max'].errors).toBeNull();
    }));

    it('should apply min and max validation when control value is defined as a string', fakeAsync(() => {
      const fixture = initTest(NgModelMinMaxValidator);
      fixture.componentInstance.min = 5;
      fixture.componentInstance.max = 10;
      fixture.detectChanges();
      tick();

      const input = fixture.debugElement.query(By.css('input')).nativeElement;
      const form = fixture.debugElement.children[0].injector.get(NgForm);

      input.value = '';
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['min_max'].errors).toBeNull();

      input.value = '11';
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(false);
      expect(form.controls['min_max'].errors).toEqual({max: {max: 10, actual: 11}});

      input.value = '4';
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(false);
      expect(form.controls['min_max'].errors).toEqual({min: {min: 5, actual: 4}});

      input.value = '9';
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['min_max'].errors).toBeNull();
    }));

    it('should re-validate if min/max changes', fakeAsync(() => {
      const fixture = initTest(NgModelMinMaxValidator);
      fixture.componentInstance.min = 5;
      fixture.componentInstance.max = 10;
      fixture.detectChanges();
      tick();

      const input = fixture.debugElement.query(By.css('input')).nativeElement;
      const form = fixture.debugElement.children[0].injector.get(NgForm);

      input.value = 10;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['min_max'].errors).toBeNull();

      input.value = 12;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(false);
      expect(form.controls['min_max'].errors).toEqual({max: {max: 10, actual: 12}});

      fixture.componentInstance.max = 12;
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['min_max'].errors).toBeNull();

      input.value = 5;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['min_max'].errors).toBeNull();

      input.value = 0;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(false);
      expect(form.controls['min_max'].errors).toEqual({min: {min: 5, actual: 0}});

      fixture.componentInstance.min = 0;
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['min_max'].errors).toBeNull();
    }));

    it('should run min/max validation for empty values ', fakeAsync(() => {
      const fixture = initTest(NgModelMinMaxValidator);
      fixture.componentInstance.min = 5;
      fixture.componentInstance.max = 10;
      fixture.detectChanges();
      tick();

      const input = fixture.debugElement.query(By.css('input')).nativeElement;
      const form = fixture.debugElement.children[0].injector.get(NgForm);

      const maxValidateFnSpy = spyOn(MaxValidator.prototype, 'validate');
      const minValidateFnSpy = spyOn(MinValidator.prototype, 'validate');

      input.value = '';
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toEqual(true);
      expect(form.controls['min_max'].errors).toBeNull();

      expect(maxValidateFnSpy).toHaveBeenCalled();
      expect(minValidateFnSpy).toHaveBeenCalled();
    }));

    it('should run min/max validation for negative values', fakeAsync(() => {
      const fixture = initTest(NgModelMinMaxValidator);
      fixture.componentInstance.min = -20;
      fixture.componentInstance.max = -10;
      fixture.detectChanges();
      tick();

      const input = fixture.debugElement.query(By.css('input')).nativeElement;
      const form = fixture.debugElement.children[0].injector.get(NgForm);

      input.value = '-30';
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toBeFalse();
      expect(form.controls['min_max'].errors).toEqual({min: {min: -20, actual: -30}});

      input.value = -15;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toBeTruthy();
      expect(form.controls['min_max'].errors).toBeNull();

      input.value = -5;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toBeFalse();
      expect(form.controls['min_max'].errors).toEqual({max: {max: -10, actual: -5}});

      input.value = 0;
      dispatchEvent(input, 'input');
      fixture.detectChanges();
      expect(form.valid).toBeFalse();
      expect(form.controls['min_max'].errors).toEqual({max: {max: -10, actual: 0}});
    }));

    it('should call registerOnValidatorChange as a part of a formGroup setup', fakeAsync(() => {
      let registerOnValidatorChangeFired = 0;
      let registerOnAsyncValidatorChangeFired = 0;

      @Directive({
        selector: '[ng-noop-validator]',
        providers: [
          {provide: NG_VALIDATORS, useExisting: forwardRef(() => NoOpValidator), multi: true},
        ],
      })
      class NoOpValidator implements Validator {
        @Input() validatorInput = '';

        validate(c: AbstractControl) {
          return null;
        }

        public registerOnValidatorChange(fn: () => void) {
          registerOnValidatorChangeFired++;
        }
      }

      @Directive({
        selector: '[ng-noop-async-validator]',
        providers: [
          {
            provide: NG_ASYNC_VALIDATORS,
            useExisting: forwardRef(() => NoOpAsyncValidator),
            multi: true,
          },
        ],
      })
      class NoOpAsyncValidator implements AsyncValidator {
        @Input() validatorInput = '';

        validate(c: AbstractControl) {
          return Promise.resolve(null);
        }

        public registerOnValidatorChange(fn: () => void) {
          registerOnAsyncValidatorChangeFired++;
        }
      }

      @Component({
        selector: 'ng-model-noop-validation',
        template: `
              <form>
                <div ngModelGroup="emptyGroup" ng-noop-validator ng-noop-async-validator [validatorInput]="validatorInput">
                  <input name="fgInput" ngModel>
                </div>
              </form>
            `,
      })
      class NgModelNoOpValidation {
        validatorInput = 'foo';
        emptyGroup = {};
      }

      const fixture = initTest(NgModelNoOpValidation, NoOpValidator, NoOpAsyncValidator);
      fixture.detectChanges();
      tick();

      expect(registerOnValidatorChangeFired).toBe(1);
      expect(registerOnAsyncValidatorChangeFired).toBe(1);

      fixture.componentInstance.validatorInput = 'bar';
      fixture.detectChanges();

      // Changing validator inputs should not cause `registerOnValidatorChange` to be invoked,
      // since it's invoked just once during the setup phase.
      expect(registerOnValidatorChangeFired).toBe(1);
      expect(registerOnAsyncValidatorChangeFired).toBe(1);
    }));
  });

  describe('IME events', () => {
    it('should determine IME event handling depending on platform by default', fakeAsync(() => {
      const fixture = initTest(StandaloneNgModel);
      const inputEl = fixture.debugElement.query(By.css('input'));
      const inputNativeEl = inputEl.nativeElement;
      fixture.componentInstance.name = 'oldValue';
      fixture.detectChanges();
      tick();
      expect(inputNativeEl.value).toEqual('oldValue');

      inputEl.triggerEventHandler('compositionstart');

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

      const isAndroid = /android (\d+)/.test(getDOM().getUserAgent().toLowerCase());
      if (isAndroid) {
        // On Android, values should update immediately
        expect(fixture.componentInstance.name).toEqual('updatedValue');
      } else {
        // On other platforms, values should wait until compositionend
        expect(fixture.componentInstance.name).toEqual('oldValue');

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

        fixture.detectChanges();
        tick();

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

    it('should hold IME events until compositionend if composition mode', fakeAsync(() => {
      TestBed.overrideComponent(StandaloneNgModel, {
        set: {providers: [{provide: COMPOSITION_BUFFER_MODE, useValue: true}]},
      });
      const fixture = initTest(StandaloneNgModel);
      const inputEl = fixture.debugElement.query(By.css('input'));
      const inputNativeEl = inputEl.nativeElement;
      fixture.componentInstance.name = 'oldValue';
      fixture.detectChanges();
      tick();
      expect(inputNativeEl.value).toEqual('oldValue');

      inputEl.triggerEventHandler('compositionstart');

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

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

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

      fixture.detectChanges();
      tick();

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

    it('should work normally with composition events if composition mode is off', fakeAsync(() => {
      TestBed.overrideComponent(StandaloneNgModel, {
        set: {providers: [{provide: COMPOSITION_BUFFER_MODE, useValue: false}]},
      });
      const fixture = initTest(StandaloneNgModel);

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

      inputEl.triggerEventHandler('compositionstart');

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

      // ngModel should update normally
      expect(fixture.componentInstance.name).toEqual('updatedValue');
    }));
  });

  describe('ngModel corner cases', () => {
    it('should update the view when the model is set back to what used to be in the view', fakeAsync(() => {
      const fixture = initTest(StandaloneNgModel);
      fixture.componentInstance.name = '';
      fixture.detectChanges();
      tick();

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

      fixture.detectChanges();
      tick();
      expect(fixture.componentInstance.name).toEqual('aa');

      // Programmatically update the input value to be "bb".
      fixture.componentInstance.name = 'bb';
      fixture.detectChanges();
      tick();
      expect(input.value).toEqual('bb');

      // Programatically set it back to "aa".
      fixture.componentInstance.name = 'aa';
      fixture.detectChanges();
      tick();
      expect(input.value).toEqual('aa');
    }));

    it('should not crash when validity is checked from a binding', fakeAsync(() => {
      const fixture = initTest(NgModelValidBinding);
      tick();
      expect(() => fixture.detectChanges()).not.toThrowError();
    }));
  });
});

@Component({
  selector: 'standalone-ng-model',
  template: `
    <input type="text" [(ngModel)]="name">
  `,
})
class StandaloneNgModel {
  name!: string;
}

@Component({
  selector: 'ng-model-form',
  template: `
    <form (ngSubmit)="event=$event" (reset)="onReset()">
      <input name="name" [(ngModel)]="name" minlength="10" [ngModelOptions]="options">
    </form>
  `,
})
class NgModelForm {
  name!: string | null;
  event!: Event;
  options = {};

  onReset() {}
}

@Component({selector: 'ng-model-native-validate-form', template: `<form ngNativeValidate></form>`})
class NgModelNativeValidateForm {}

@Component({
  selector: 'ng-model-group-form',
  template: `
    <form>
      <div ngModelGroup="name">
        <input name="first" [(ngModel)]="first" required [disabled]="isDisabled">
        <input name="last" [(ngModel)]="last">
      </div>
      <input name="email" [(ngModel)]="email" [ngModelOptions]="options">
    </form>
  `,
})
class NgModelGroupForm {
  first!: string;
  last!: string;
  email!: string;
  isDisabled!: boolean;
  options = {updateOn: 'change'};
}

@Component({
  selector: 'ng-model-valid-binding',
  template: `
    <form>
      <div ngModelGroup="name" #group="ngModelGroup">
        <input name="first" [(ngModel)]="first" required>
        {{ group.valid }}
      </div>
    </form>
  `,
})
class NgModelValidBinding {
  first!: string;
}

@Component({
  selector: 'ng-model-ngif-form',
  template: `
    <form>
      <div ngModelGroup="name" *ngIf="groupShowing">
        <input name="first" [(ngModel)]="first">
      </div>
      <input name="email" [(ngModel)]="email" *ngIf="emailShowing">
    </form>
  `,
})
class NgModelNgIfForm {
  first!: string;
  groupShowing = true;
  emailShowing = true;
  email!: string;
}

@Component({
  selector: 'ng-model-nested',
  template: `
    <form>
      <div ngModelGroup="contact-info">
        <input name="first" [(ngModel)]="first">
        <div ngModelGroup="other-names">
          <input name="other-names" [(ngModel)]="other">
        </div>
      </div>
    </form>
  `,
})
class NgModelNestedForm {
  first!: string;
  other!: string;
}

@Component({
  selector: 'ng-no-form',
  template: `
    <form ngNoForm>
      <input name="name">
    </form>
  `,
})
class NgNoFormComp {}

@Component({
  selector: 'invalid-ng-model-noname',
  template: `
    <form>
      <input [(ngModel)]="name">
    </form>
  `,
})
class InvalidNgModelNoName {}

@Component({
  selector: 'ng-model-options-standalone',
  template: `
    <form [ngFormOptions]="formOptions">
      <input name="one" [(ngModel)]="one">
      <input [(ngModel)]="two" [ngModelOptions]="options">
    </form>
  `,
})
class NgModelOptionsStandalone {
  one!: string;
  two!: string;
  options: {name?: string; standalone?: boolean; updateOn?: string} = {standalone: true};
  formOptions = {};
}

@Component({
  selector: 'ng-model-validation-bindings',
  template: `
    <form>
      <input name="required" ngModel  [required]="required">
      <input name="minlength" ngModel  [minlength]="minLen">
      <input name="maxlength" ngModel [maxlength]="maxLen">
      <input name="pattern" ngModel  [pattern]="pattern">
    </form>
  `,
})
class NgModelValidationBindings {
  required!: boolean;
  minLen!: number;
  maxLen!: number;
  pattern!: string;
}

@Component({
  selector: 'ng-model-multiple-validators',
  template: `
    <form>
      <input name="tovalidate" ngModel  [required]="required" [minlength]="minLen" [pattern]="pattern">
    </form>
  `,
})
class NgModelMultipleValidators {
  required!: boolean;
  minLen!: number;
  pattern!: string | RegExp;
}

@Component({
  selector: 'ng-model-checkbox-validator',
  template: `<form><input type="checkbox" [(ngModel)]="accepted" [required]="required" name="checkbox"></form>`,
})
class NgModelCheckboxRequiredValidator {
  accepted: boolean = false;
  required: boolean = false;
}

@Component({
  selector: 'ng-model-email',
  template: `<form><input type="email" ngModel [email]="validatorEnabled" name="email"></form>`,
})
class NgModelEmailValidator {
  validatorEnabled: boolean = false;
}

@Directive({
  selector: '[ng-async-validator]',
  providers: [
    {provide: NG_ASYNC_VALIDATORS, useExisting: forwardRef(() => NgAsyncValidator), multi: true},
  ],
})
class NgAsyncValidator implements AsyncValidator {
  validate(c: AbstractControl) {
    return Promise.resolve(null);
  }
}

@Component({
  selector: 'ng-model-async-validation',
  template: `<input name="async" ngModel ng-async-validator>`,
})
class NgModelAsyncValidation {}

@Component({
  selector: 'ng-model-changes-form',
  template: `
    <form>
      <input name="async" [ngModel]="name" (ngModelChange)="log()"
             [ngModelOptions]="options">
    </form>
  `,
})
class NgModelChangesForm {
  name!: string;
  events: string[] = [];
  options: any;

  log() {
    this.events.push('fired');
  }
}

@Component({
  selector: 'ng-model-change-state',
  template: `
    <input #ngModel="ngModel" ngModel [maxlength]="4"
           (ngModelChange)="onNgModelChange(ngModel)">
  `,
})
class NgModelChangeState {
  onNgModelChange = () => {};
}

@Component({
  selector: 'ng-model-max',
  template: `<form><input name="max" type="number" ngModel [max]="max"></form>`,
})
class NgModelMaxValidator {
  max!: number;
}

@Component({
  selector: 'ng-model-min',
  template: `<form><input name="min" type="number" ngModel [min]="min"></form>`,
})
class NgModelMinValidator {
  min!: number;
}

@Component({
  selector: 'ng-model-min-max',
  template: `
    <form><input name="min_max" type="number" ngModel [min]="min" [max]="max"></form>`,
})
class NgModelMinMaxValidator {
  min!: number | string;
  max!: number | string;
}

@Directive({selector: '[myDir]'})
class CustomDirective {
  @Input() min!: number;
  @Input() max!: number;
}

@Component({
  selector: 'ng-model-no-min-max',
  template: `
    <form>
      <input name="min" type="text" ngModel [min]="min" myDir>
      <input name="max" type="text" ngModel [max]="max" myDir>
    </form>
  `,
})
class NgModelNoMinMaxValidator {
  min!: number;
  max!: number;
  @ViewChild('myDir') myDir: any;
}

@Component({
  selector: 'ng-model-nested',
  template: `
    <dialog open>
      <form #form method="dialog">
        <button>Submit</button>
      </form>
    </dialog>
  `,
})
class NativeDialogForm {
  @ViewChild('form') form!: ElementRef<HTMLFormElement>;
}
