angular-docs-cn/modules/angular2/test/common/forms/integration_spec.ts

import {Component, Directive, View, Output, EventEmitter} from 'angular2/angular2';
import {
  ComponentFixture,
  afterEach,
  AsyncTestCompleter,
  TestComponentBuilder,
  beforeEach,
  ddescribe,
  describe,
  dispatchEvent,
  fakeAsync,
  tick,
  expect,
  it,
  inject,
  iit,
  xit,
  browserDetection
} from 'angular2/testing_internal';

import {DOM} from 'angular2/src/core/dom/dom_adapter';
import {
  Input,
  Control,
  ControlGroup,
  ControlValueAccessor,
  FORM_DIRECTIVES,
  NG_VALIDATORS,
  NG_ASYNC_VALIDATORS,
  Provider,
  NgControl,
  NgIf,
  NgFor,
  NgForm,
  Validators,
  forwardRef,
  Validator
} from 'angular2/core';
import {By} from 'angular2/platform/browser';
import {ListWrapper} from 'angular2/src/facade/collection';
import {ObservableWrapper} from 'angular2/src/facade/async';
import {CONST_EXPR} from 'angular2/src/facade/lang';
import {PromiseWrapper} from "angular2/src/facade/promise";

export function main() {
  describe("integration tests", () => {

    it("should initialize DOM elements with the given form object",
       inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
         var t = `<div [ng-form-model]="form">
                <input type="text" ng-control="login">
               </div>`;

         tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
           fixture.debugElement.componentInstance.form =
               new ControlGroup({"login": new Control("loginValue")});
           fixture.detectChanges();

           var input = fixture.debugElement.query(By.css("input"));
           expect(input.nativeElement.value).toEqual("loginValue");
           async.done();
         });
       }));

    it("should update the control group values on DOM change",
       inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
         var form = new ControlGroup({"login": new Control("oldValue")});

         var t = `<div [ng-form-model]="form">
                <input type="text" ng-control="login">
              </div>`;

         tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
           fixture.debugElement.componentInstance.form = form;
           fixture.detectChanges();
           var input = fixture.debugElement.query(By.css("input"));

           input.nativeElement.value = "updatedValue";
           dispatchEvent(input.nativeElement, "change");

           expect(form.value).toEqual({"login": "updatedValue"});
           async.done();
         });
       }));

    it("should emit ng-submit event on submit",
       inject([TestComponentBuilder], fakeAsync((tcb: TestComponentBuilder) => {
                var t = `<div>
                      <form [ng-form-model]="form" (ng-submit)="name='updated'"></form>
                      <span>{{name}}</span>
                    </div>`;

                var fixture: ComponentFixture;

                tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then(
                    (root) => { fixture = root; });
                tick();

                fixture.debugElement.componentInstance.form = new ControlGroup({});
                fixture.debugElement.componentInstance.name = 'old';

                tick();

                var form = fixture.debugElement.query(By.css("form"));
                dispatchEvent(form.nativeElement, "submit");

                tick();
                expect(fixture.debugElement.componentInstance.name).toEqual('updated');
              })));

    it("should work with single controls",
       inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
         var control = new Control("loginValue");

         var t = `<div><input type="text" [ng-form-control]="form"></div>`;

         tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
           fixture.debugElement.componentInstance.form = control;
           fixture.detectChanges();

           var input = fixture.debugElement.query(By.css("input"));
           expect(input.nativeElement.value).toEqual("loginValue");

           input.nativeElement.value = "updatedValue";
           dispatchEvent(input.nativeElement, "change");

           expect(control.value).toEqual("updatedValue");
           async.done();
         });
       }));

    it("should update DOM elements when rebinding the control group",
       inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
         var t = `<div [ng-form-model]="form">
                <input type="text" ng-control="login">
               </div>`;

         tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
           fixture.debugElement.componentInstance.form =
               new ControlGroup({"login": new Control("oldValue")});
           fixture.detectChanges();

           fixture.debugElement.componentInstance.form =
               new ControlGroup({"login": new Control("newValue")});
           fixture.detectChanges();

           var input = fixture.debugElement.query(By.css("input"));
           expect(input.nativeElement.value).toEqual("newValue");
           async.done();
         });
       }));

    it("should update DOM elements when updating the value of a control",
       inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
         var login = new Control("oldValue");
         var form = new ControlGroup({"login": login});

         var t = `<div [ng-form-model]="form">
                <input type="text" ng-control="login">
               </div>`;

         tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
           fixture.debugElement.componentInstance.form = form;
           fixture.detectChanges();

           login.updateValue("newValue");

           fixture.detectChanges();

           var input = fixture.debugElement.query(By.css("input"));
           expect(input.nativeElement.value).toEqual("newValue");
           async.done();
         });
       }));

    it("should mark controls as touched after interacting with the DOM control",
       inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
         var login = new Control("oldValue");
         var form = new ControlGroup({"login": login});

         var t = `<div [ng-form-model]="form">
                <input type="text" ng-control="login">
               </div>`;

         tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
           fixture.debugElement.componentInstance.form = form;
           fixture.detectChanges();

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

           dispatchEvent(loginEl.nativeElement, "blur");

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

           async.done();
         });
       }));

    describe("different control types", () => {
      it("should support <input type=text>",
         inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
           var t = `<div [ng-form-model]="form">
                  <input type="text" ng-control="text">
                </div>`;

           tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
             fixture.debugElement.componentInstance.form =
                 new ControlGroup({"text": new Control("old")});
             fixture.detectChanges();

             var input = fixture.debugElement.query(By.css("input"));
             expect(input.nativeElement.value).toEqual("old");

             input.nativeElement.value = "new";
             dispatchEvent(input.nativeElement, "input");

             expect(fixture.debugElement.componentInstance.form.value).toEqual({"text": "new"});
             async.done();
           });
         }));

      it("should support <input> without type",
         inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
           var t = `<div [ng-form-model]="form">
                  <input ng-control="text">
                </div>`;

           tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
             fixture.debugElement.componentInstance.form =
                 new ControlGroup({"text": new Control("old")});
             fixture.detectChanges();
             var input = fixture.debugElement.query(By.css("input"));
             expect(input.nativeElement.value).toEqual("old");

             input.nativeElement.value = "new";
             dispatchEvent(input.nativeElement, "input");

             expect(fixture.debugElement.componentInstance.form.value).toEqual({"text": "new"});
             async.done();
           });
         }));

      it("should support <textarea>",
         inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
           var t = `<div [ng-form-model]="form">
                  <textarea ng-control="text"></textarea>
                </div>`;

           tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
             fixture.debugElement.componentInstance.form =
                 new ControlGroup({"text": new Control('old')});
             fixture.detectChanges();

             var textarea = fixture.debugElement.query(By.css("textarea"));
             expect(textarea.nativeElement.value).toEqual("old");

             textarea.nativeElement.value = "new";
             dispatchEvent(textarea.nativeElement, "input");

             expect(fixture.debugElement.componentInstance.form.value).toEqual({"text": 'new'});
             async.done();
           });
         }));

      it("should support <type=checkbox>",
         inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
           var t = `<div [ng-form-model]="form">
                  <input type="checkbox" ng-control="checkbox">
                </div>`;

           tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
             fixture.debugElement.componentInstance.form =
                 new ControlGroup({"checkbox": new Control(true)});
             fixture.detectChanges();

             var input = fixture.debugElement.query(By.css("input"));
             expect(input.nativeElement.checked).toBe(true);

             input.nativeElement.checked = false;
             dispatchEvent(input.nativeElement, "change");

             expect(fixture.debugElement.componentInstance.form.value).toEqual({"checkbox": false});
             async.done();
           });
         }));

      it("should support <type=number>",
         inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
           var t = `<div [ng-form-model]="form">
                  <input type="number" ng-control="num">
                </div>`;

           tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
             fixture.debugElement.componentInstance.form =
                 new ControlGroup({"num": new Control(10)});
             fixture.detectChanges();

             var input = fixture.debugElement.query(By.css("input"));
             expect(input.nativeElement.value).toEqual("10");

             input.nativeElement.value = "20";
             dispatchEvent(input.nativeElement, "change");

             expect(fixture.debugElement.componentInstance.form.value).toEqual({"num": 20});
             async.done();
           });
         }));

      it("should support <select>",
         inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
           var t = `<div [ng-form-model]="form">
                    <select ng-control="city">
                      <option value="SF"></option>
                      <option value="NYC"></option>
                    </select>
                  </div>`;

           tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
             fixture.debugElement.componentInstance.form =
                 new ControlGroup({"city": new Control("SF")});
             fixture.detectChanges();

             var select = fixture.debugElement.query(By.css("select"));
             var sfOption = fixture.debugElement.query(By.css("option"));
             expect(select.nativeElement.value).toEqual('SF');
             expect(sfOption.nativeElement.selected).toBe(true);

             select.nativeElement.value = 'NYC';
             dispatchEvent(select.nativeElement, "change");

             expect(fixture.debugElement.componentInstance.form.value).toEqual({"city": 'NYC'});
             expect(sfOption.nativeElement.selected).toBe(false);
             async.done();
           });
         }));

      it("should support <select> with a dynamic list of options",
         inject([TestComponentBuilder], fakeAsync((tcb: TestComponentBuilder) => {
                  var t = `<div [ng-form-model]="form">
                      <select ng-control="city">
                        <option *ng-for="#c of data" [value]="c"></option>
                      </select>
                  </div>`;

                  var fixture;
                  tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then(
                      (compFixture) => fixture = compFixture);
                  tick();

                  fixture.debugElement.componentInstance.form =
                      new ControlGroup({"city": new Control("NYC")});
                  fixture.debugElement.componentInstance.data = ['SF', 'NYC'];
                  fixture.detectChanges();
                  tick();

                  var select = fixture.debugElement.query(By.css('select'));
                  expect(select.nativeElement.value).toEqual('NYC');
                })));

      it("should support custom value accessors",
         inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
           var t = `<div [ng-form-model]="form">
                  <input type="text" ng-control="name" wrapped-value>
                </div>`;

           tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
             fixture.debugElement.componentInstance.form =
                 new ControlGroup({"name": new Control("aa")});
             fixture.detectChanges();
             var input = fixture.debugElement.query(By.css("input"));
             expect(input.nativeElement.value).toEqual("!aa!");

             input.nativeElement.value = "!bb!";
             dispatchEvent(input.nativeElement, "change");

             expect(fixture.debugElement.componentInstance.form.value).toEqual({"name": "bb"});
             async.done();
           });
         }));

      it("should support custom value accessors on non builtin input elements that fire a change event without a 'target' property",
         inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
           var t = `<div [ng-form-model]="form">
                  <my-input ng-control="name"></my-input>
                </div>`;

           tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
             fixture.debugElement.componentInstance.form =
                 new ControlGroup({"name": new Control("aa")});
             fixture.detectChanges();
             var input = fixture.debugElement.query(By.css("my-input"));
             expect(input.componentInstance.value).toEqual("!aa!");

             input.componentInstance.value = "!bb!";
             ObservableWrapper.subscribe(input.componentInstance.onChange, (value) => {
               expect(fixture.debugElement.componentInstance.form.value).toEqual({"name": "bb"});
               async.done();
             });
             input.componentInstance.dispatchChangeEvent();
           });
         }));

    });

    describe("validations", () => {
      it("should use sync validators defined in html",
         inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
           var form = new ControlGroup(
               {"login": new Control(""), "min": new Control(""), "max": new Control("")});

           var t = `<div [ng-form-model]="form" login-is-empty-validator>
                    <input type="text" ng-control="login" required>
                    <input type="text" ng-control="min" minlength="3">
                    <input type="text" ng-control="max" maxlength="3">
                 </div>`;

           tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
             fixture.debugElement.componentInstance.form = form;
             fixture.detectChanges();

             var required = fixture.debugElement.query(By.css("[required]"));
             var minLength = fixture.debugElement.query(By.css("[minlength]"));
             var maxLength = fixture.debugElement.query(By.css("[maxlength]"));

             required.nativeElement.value = "";
             minLength.nativeElement.value = "1";
             maxLength.nativeElement.value = "1234";
             dispatchEvent(required.nativeElement, "change");
             dispatchEvent(minLength.nativeElement, "change");
             dispatchEvent(maxLength.nativeElement, "change");

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

             expect(form.hasError("loginIsEmpty")).toEqual(true);

             required.nativeElement.value = "1";
             minLength.nativeElement.value = "123";
             maxLength.nativeElement.value = "123";
             dispatchEvent(required.nativeElement, "change");
             dispatchEvent(minLength.nativeElement, "change");
             dispatchEvent(maxLength.nativeElement, "change");

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

             async.done();
           });
         }));

      it("should use async validators defined in the html",
         inject([TestComponentBuilder], fakeAsync((tcb: TestComponentBuilder) => {
                  var form = new ControlGroup({"login": new Control("")});

                  var t = `<div [ng-form-model]="form">
                    <input type="text" ng-control="login" uniq-login-validator="expected">
                 </div>`;

                  var rootTC;
                  tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((root) => rootTC = root);
                  tick();

                  rootTC.debugElement.componentInstance.form = form;
                  rootTC.detectChanges();

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

                  tick(100);

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

                  var input = rootTC.debugElement.query(By.css("input"));
                  input.nativeElement.value = "expected";
                  dispatchEvent(input.nativeElement, "change");
                  tick(100);

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

      it("should use sync validators defined in the model",
         inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
           var form = new ControlGroup({"login": new Control("aa", Validators.required)});

           var t = `<div [ng-form-model]="form">
                  <input type="text" ng-control="login">
                 </div>`;

           tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
             fixture.debugElement.componentInstance.form = form;
             fixture.detectChanges();
             expect(form.valid).toEqual(true);

             var input = fixture.debugElement.query(By.css("input"));

             input.nativeElement.value = "";
             dispatchEvent(input.nativeElement, "change");

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

      it("should use async validators defined in the model",
         inject([TestComponentBuilder], fakeAsync((tcb: TestComponentBuilder) => {
                  var control =
                      new Control("", Validators.required, uniqLoginAsyncValidator("expected"));
                  var form = new ControlGroup({"login": control});

                  var t = `<div [ng-form-model]="form">
                  <input type="text" ng-control="login">
                 </div>`;

                  var fixture;
                  tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((root) => fixture =
                                                                               root);
                  tick();

                  fixture.debugElement.componentInstance.form = form;
                  fixture.detectChanges();

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

                  var input = fixture.debugElement.query(By.css("input"));
                  input.nativeElement.value = "wrong value";
                  dispatchEvent(input.nativeElement, "change");

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

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

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

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

    describe("nested forms", () => {
      it("should init DOM with the given form object",
         inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
           var form =
               new ControlGroup({"nested": new ControlGroup({"login": new Control("value")})});

           var t = `<div [ng-form-model]="form">
                  <div ng-control-group="nested">
                    <input type="text" ng-control="login">
                  </div>
              </div>`;

           tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
             fixture.debugElement.componentInstance.form = form;
             fixture.detectChanges();

             var input = fixture.debugElement.query(By.css("input"));
             expect(input.nativeElement.value).toEqual("value");
             async.done();
           });
         }));

      it("should update the control group values on DOM change",
         inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
           var form =
               new ControlGroup({"nested": new ControlGroup({"login": new Control("value")})});

           var t = `<div [ng-form-model]="form">
                    <div ng-control-group="nested">
                      <input type="text" ng-control="login">
                    </div>
                </div>`;

           tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
             fixture.debugElement.componentInstance.form = form;
             fixture.detectChanges();
             var input = fixture.debugElement.query(By.css("input"));

             input.nativeElement.value = "updatedValue";
             dispatchEvent(input.nativeElement, "change");

             expect(form.value).toEqual({"nested": {"login": "updatedValue"}});
             async.done();
           });
         }));
    });

    it("should support ng-model for complex forms",
       inject(
           [TestComponentBuilder], fakeAsync((tcb: TestComponentBuilder) => {
             var form = new ControlGroup({"name": new Control("")});

             var t =
                 `<div [ng-form-model]="form"><input type="text" ng-control="name" [(ng-model)]="name"></div>`;

             var fixture: ComponentFixture;
             tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then(
                 (root) => { fixture = root; });
             tick();

             fixture.debugElement.componentInstance.name = 'oldValue';
             fixture.debugElement.componentInstance.form = form;
             fixture.detectChanges();

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

             input.value = "updatedValue";
             dispatchEvent(input, "change");

             tick();
             expect(fixture.debugElement.componentInstance.name).toEqual("updatedValue");
           })));

    it("should support ng-model for single fields",
       inject([TestComponentBuilder], fakeAsync((tcb: TestComponentBuilder) => {
                var form = new Control("");

                var t =
                    `<div><input type="text" [ng-form-control]="form" [(ng-model)]="name"></div>`;

                var fixture: ComponentFixture;
                tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then(
                    (root) => { fixture = root; });
                tick();
                fixture.debugElement.componentInstance.form = form;
                fixture.debugElement.componentInstance.name = "oldValue";
                fixture.detectChanges();

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

                input.value = "updatedValue";
                dispatchEvent(input, "change");
                tick();

                expect(fixture.debugElement.componentInstance.name).toEqual("updatedValue");
              })));

    describe("template-driven forms", () => {
      it("should add new controls and control groups",
         inject([TestComponentBuilder], fakeAsync((tcb: TestComponentBuilder) => {
                  var t = `<form>
                     <div ng-control-group="user">
                      <input type="text" ng-control="login">
                     </div>
               </form>`;

                  var fixture: ComponentFixture;
                  tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then(
                      (root) => { fixture = root; });
                  tick();
                  fixture.debugElement.componentInstance.name = null;
                  fixture.detectChanges();

                  var form = fixture.debugElement.componentViewChildren[0].inject(NgForm);
                  expect(form.controls['user']).not.toBeDefined();

                  tick();

                  expect(form.controls['user']).toBeDefined();
                  expect(form.controls['user'].controls['login']).toBeDefined();
                })));

      it("should emit ng-submit event on submit",
         inject([TestComponentBuilder], fakeAsync((tcb: TestComponentBuilder) => {
                  var t = `<div><form (ng-submit)="name='updated'"></form></div>`;

                  var fixture: ComponentFixture;
                  tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then(
                      (root) => { fixture = root; });
                  tick();
                  fixture.debugElement.componentInstance.name = 'old';
                  var form = fixture.debugElement.query(By.css("form"));

                  dispatchEvent(form.nativeElement, "submit");
                  tick();

                  expect(fixture.debugElement.componentInstance.name).toEqual("updated");
                })));

      it("should not create a template-driven form when ng-no-form is used",
         inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
           var t = `<form ng-no-form>
               </form>`;

           tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
             fixture.debugElement.componentInstance.name = null;
             fixture.detectChanges();

             expect(fixture.debugElement.componentViewChildren.length).toEqual(0);
             async.done();
           });
         }));

      it("should remove controls",
         inject([TestComponentBuilder], fakeAsync((tcb: TestComponentBuilder) => {
                  var t = `<form>
                    <div *ng-if="name == 'show'">
                      <input type="text" ng-control="login">
                    </div>
                  </form>`;

                  var fixture: ComponentFixture;
                  tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then(
                      (root) => { fixture = root; });
                  tick();
                  fixture.debugElement.componentInstance.name = 'show';
                  fixture.detectChanges();
                  tick();
                  var form = fixture.debugElement.componentViewChildren[0].inject(NgForm);


                  expect(form.controls['login']).toBeDefined();

                  fixture.debugElement.componentInstance.name = 'hide';
                  fixture.detectChanges();
                  tick();

                  expect(form.controls['login']).not.toBeDefined();
                })));

      it("should remove control groups",
         inject([TestComponentBuilder], fakeAsync((tcb: TestComponentBuilder) => {
                  var t = `<form>
                     <div *ng-if="name=='show'" ng-control-group="user">
                      <input type="text" ng-control="login">
                     </div>
               </form>`;


                  var fixture: ComponentFixture;
                  tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then(
                      (root) => { fixture = root; });
                  tick();
                  fixture.debugElement.componentInstance.name = 'show';
                  fixture.detectChanges();
                  tick();
                  var form = fixture.debugElement.componentViewChildren[0].inject(NgForm);

                  expect(form.controls['user']).toBeDefined();

                  fixture.debugElement.componentInstance.name = 'hide';
                  fixture.detectChanges();
                  tick();

                  expect(form.controls['user']).not.toBeDefined();
                })));

      it("should support ng-model for complex forms",
         inject([TestComponentBuilder], fakeAsync((tcb: TestComponentBuilder) => {
                  var t = `<form>
                      <input type="text" ng-control="name" [(ng-model)]="name">
               </form>`;

                  var fixture: ComponentFixture;
                  tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then(
                      (root) => { fixture = root; });
                  tick();
                  fixture.debugElement.componentInstance.name = "oldValue";
                  fixture.detectChanges();
                  tick();

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

                  input.value = "updatedValue";
                  dispatchEvent(input, "change");
                  tick();

                  expect(fixture.debugElement.componentInstance.name).toEqual("updatedValue");
                })));


      it("should support ng-model for single fields",
         inject([TestComponentBuilder], fakeAsync((tcb: TestComponentBuilder) => {
                  var t = `<div><input type="text" [(ng-model)]="name"></div>`;

                  var fixture: ComponentFixture;
                  tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then(
                      (root) => { fixture = root; });
                  tick();
                  fixture.debugElement.componentInstance.name = "oldValue";
                  fixture.detectChanges();

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

                  input.value = "updatedValue";
                  dispatchEvent(input, "change");
                  tick();

                  expect(fixture.debugElement.componentInstance.name).toEqual("updatedValue");
                })));
    });


    describe("setting status classes", () => {
      it("should work with single fields",
         inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
           var form = new Control("", Validators.required);

           var t = `<div><input type="text" [ng-form-control]="form"></div>`;

           tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
             fixture.debugElement.componentInstance.form = form;
             fixture.detectChanges();

             var 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, "change");
             fixture.detectChanges();

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

      it("should work with complex model-driven forms",
         inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
           var form = new ControlGroup({"name": new Control("", Validators.required)});

           var t = `<form [ng-form-model]="form"><input type="text" ng-control="name"></form>`;

           tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
             fixture.debugElement.componentInstance.form = form;
             fixture.detectChanges();

             var 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, "change");
             fixture.detectChanges();

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

      it("should work with ng-model",
         inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
           var t = `<div><input [(ng-model)]="name" required></div>`;

           tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then((fixture) => {
             fixture.debugElement.componentInstance.name = "";
             fixture.detectChanges();

             var 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, "change");
             fixture.detectChanges();

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

    describe("ng-model corner cases", () => {
      it("should not update the view when the value initially came from the view",
         inject([TestComponentBuilder], fakeAsync((tcb: TestComponentBuilder) => {
                  var form = new Control("");

                  var t =
                      `<div><input type="text" [ng-form-control]="form" [(ng-model)]="name"></div>`;
                  var fixture: ComponentFixture;
                  tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then(
                      (root) => { fixture = root; });
                  tick();
                  fixture.debugElement.componentInstance.form = form;
                  fixture.detectChanges();

                  // In Firefox, effective text selection in the real DOM requires an actual focus
                  // of the field. This is not an issue in a new HTML document.
                  if (browserDetection.isFirefox) {
                    var fakeDoc = DOM.createHtmlDocument();
                    DOM.appendChild(fakeDoc.body, fixture.debugElement.nativeElement);
                  }

                  var input = fixture.debugElement.query(By.css("input")).nativeElement;
                  input.value = "aa";
                  input.selectionStart = 1;
                  dispatchEvent(input, "change");

                  tick();
                  fixture.detectChanges();

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

      it("should update the view when the model is set back to what used to be in the view",
         inject([TestComponentBuilder], fakeAsync((tcb: TestComponentBuilder) => {
                  var t = `<input type="text" [(ng-model)]="name">`;
                  var fixture: ComponentFixture;
                  tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then(
                      (root) => { fixture = root; });
                  tick();
                  fixture.debugElement.componentInstance.name = "";
                  fixture.detectChanges();

                  // Type "aa" into the input.
                  var input = fixture.debugElement.query(By.css("input")).nativeElement;
                  input.value = "aa";
                  input.selectionStart = 1;
                  dispatchEvent(input, "change");

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

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

                  // Programatically set it back to "aa".
                  fixture.debugElement.componentInstance.name = "aa";
                  tick();
                  fixture.detectChanges();
                  expect(input.value).toEqual("aa");
                })));
      it("should not crash when validity is checked from a binding",
         inject([TestComponentBuilder], fakeAsync((tcb: TestComponentBuilder) => {
                  // {{x.valid}} used to crash because valid() tried to read a property
                  // from form.control before it was set. This test verifies this bug is
                  // fixed.
                  var t = `<form><div ng-control-group="x" #x="form">
                  <input type="text" ng-control="test"></div>{{x.valid}}</form>`;
                  var fixture: ComponentFixture;
                  tcb.overrideTemplate(MyComp, t).createAsync(MyComp).then(
                      (root) => { fixture = root; });
                  tick();
                  fixture.detectChanges();
                })));
    });
  });
}

@Directive({
  selector: '[wrapped-value]',
  host: {'(change)': 'handleOnChange($event.target.value)', '[value]': 'value'}
})
class WrappedValue implements ControlValueAccessor {
  value;
  onChange: Function;

  constructor(cd: NgControl) { cd.valueAccessor = this; }

  writeValue(value) { this.value = `!${value}!`; }

  registerOnChange(fn) { this.onChange = fn; }
  registerOnTouched(fn) {}

  handleOnChange(value) { this.onChange(value.substring(1, value.length - 1)); }
}

@Component({selector: "my-input", template: ''})
class MyInput implements ControlValueAccessor {
  @Output('change') onChange: EventEmitter<any> = new EventEmitter();
  value: string;

  constructor(cd: NgControl) { cd.valueAccessor = this; }

  writeValue(value) { this.value = `!${value}!`; }

  registerOnChange(fn) { ObservableWrapper.subscribe(this.onChange, fn); }

  registerOnTouched(fn) {}

  dispatchChangeEvent() {
    ObservableWrapper.callEmit(this.onChange, this.value.substring(1, this.value.length - 1));
  }
}

function uniqLoginAsyncValidator(expectedValue: string) {
  return (c) => {
    var completer = PromiseWrapper.completer();
    var res = (c.value == expectedValue) ? null : {"uniqLogin": true};
    completer.resolve(res);
    return completer.promise;
  };
}

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

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

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

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

@Component({
  selector: "my-comp",
  template: '',
  directives: [
    FORM_DIRECTIVES,
    WrappedValue,
    MyInput,
    NgIf,
    NgFor,
    LoginIsEmptyValidator,
    UniqLoginValidator
  ]
})
class MyComp {
  form: any;
  name: string;
  data: any;
}

function sortedClassList(el) {
  var l = DOM.classList(el);
  ListWrapper.sort(l);
  return l;
}