/**
 * @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, DOCUMENT, ɵgetDOM as getDOM} from '@angular/common';
import {
  Attribute,
  Compiler,
  Component,
  ComponentFactory,
  ComponentRef,
  ContentChildren,
  createComponent,
  Directive,
  EnvironmentInjector,
  EventEmitter,
  Host,
  HostBinding,
  HostListener,
  Inject,
  Injectable,
  InjectionToken,
  Injector,
  Input,
  NgModule,
  NgModuleRef,
  NO_ERRORS_SCHEMA,
  OnDestroy,
  Output,
  Pipe,
  reflectComponentType,
  SkipSelf,
  ViewChild,
  ViewRef,
  ɵsetClassDebugInfo,
} from '@angular/core';
import {
  ChangeDetectionStrategy,
  ChangeDetectorRef,
  PipeTransform,
} from '@angular/core/src/change_detection/change_detection';
import {ComponentFactoryResolver} from '@angular/core/src/linker/component_factory_resolver';
import {ElementRef} from '@angular/core/src/linker/element_ref';
import {QueryList} from '@angular/core/src/linker/query_list';
import {TemplateRef} from '@angular/core/src/linker/template_ref';
import {ViewContainerRef} from '@angular/core/src/linker/view_container_ref';
import {EmbeddedViewRef} from '@angular/core/src/linker/view_ref';
import {fakeAsync, getTestBed, TestBed, tick, waitForAsync} from '@angular/core/testing';
import {TestBedCompiler} from '@angular/core/testing/src/test_bed_compiler';
import {
  createMouseEvent,
  dispatchEvent,
  el,
  isCommentNode,
} from '@angular/platform-browser/testing/src/browser_util';
import {expect} from '@angular/platform-browser/testing/src/matchers';

import {stringify} from '../../src/util/stringify';

const ANCHOR_ELEMENT = new InjectionToken('AnchorElement');

describe('integration tests', function () {
  describe('react to record changes', function () {
    it('should consume text node changes', () => {
      TestBed.configureTestingModule({declarations: [MyComp]});
      const template = '<div>{{ctxProp}}</div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);
      fixture.componentInstance.ctxProp = 'Hello World!';

      fixture.detectChanges();
      expect(fixture.nativeElement).toHaveText('Hello World!');
    });

    it('should update text node with a blank string when interpolation evaluates to null', () => {
      TestBed.configureTestingModule({declarations: [MyComp]});
      const template = '<div>{{null}}{{ctxProp}}</div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);
      fixture.componentInstance.ctxProp = null!;

      fixture.detectChanges();
      expect(fixture.nativeElement).toHaveText('');
    });

    it('should allow both null and undefined in expressions', () => {
      const template = '<div>{{null == undefined}}|{{null === undefined}}</div>';
      const fixture = TestBed.configureTestingModule({declarations: [MyComp]})
        .overrideComponent(MyComp, {set: {template}})
        .createComponent(MyComp);
      fixture.detectChanges();
      expect(fixture.nativeElement).toHaveText('true|false');
    });

    it('should support an arbitrary number of interpolations in an element', () => {
      TestBed.configureTestingModule({declarations: [MyComp]});
      const template = `<div>before{{'0'}}a{{'1'}}b{{'2'}}c{{'3'}}d{{'4'}}e{{'5'}}f{{'6'}}g{{'7'}}h{{'8'}}i{{'9'}}j{{'10'}}after</div>`;
      const fixture = TestBed.overrideComponent(MyComp, {set: {template}}).createComponent(MyComp);

      fixture.detectChanges();
      expect(fixture.nativeElement).toHaveText('before0a1b2c3d4e5f6g7h8i9j10after');
    });

    it('should use a blank string when interpolation evaluates to null or undefined with an arbitrary number of interpolations', () => {
      TestBed.configureTestingModule({declarations: [MyComp]});
      const template = `<div>0{{null}}a{{undefined}}b{{null}}c{{undefined}}d{{null}}e{{undefined}}f{{null}}g{{undefined}}h{{null}}i{{undefined}}j{{null}}1</div>`;
      const fixture = TestBed.overrideComponent(MyComp, {set: {template}}).createComponent(MyComp);

      fixture.detectChanges();
      expect(fixture.nativeElement).toHaveText('0abcdefghij1');
    });

    it('should consume element binding changes', () => {
      TestBed.configureTestingModule({declarations: [MyComp]});
      const template = '<div [id]="ctxProp"></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxProp = 'Hello World!';
      fixture.detectChanges();

      expect(fixture.debugElement.children[0].nativeElement.id).toEqual('Hello World!');
    });

    it('should consume binding to aria-* attributes', () => {
      TestBed.configureTestingModule({declarations: [MyComp]});
      const template = '<div [attr.aria-label]="ctxProp"></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxProp = 'Initial aria label';
      fixture.detectChanges();
      expect(fixture.debugElement.children[0].nativeElement.getAttribute('aria-label')).toEqual(
        'Initial aria label',
      );

      fixture.componentInstance.ctxProp = 'Changed aria label';
      fixture.detectChanges();
      expect(fixture.debugElement.children[0].nativeElement.getAttribute('aria-label')).toEqual(
        'Changed aria label',
      );
    });

    it('should remove an attribute when attribute expression evaluates to null', () => {
      TestBed.configureTestingModule({declarations: [MyComp]});
      const template = '<div [attr.foo]="ctxProp"></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxProp = 'bar';
      fixture.detectChanges();
      expect(fixture.debugElement.children[0].nativeElement.getAttribute('foo')).toEqual('bar');

      fixture.componentInstance.ctxProp = null!;
      fixture.detectChanges();
      expect(fixture.debugElement.children[0].nativeElement.hasAttribute('foo')).toBeFalsy();
    });

    it('should remove style when when style expression evaluates to null', () => {
      TestBed.configureTestingModule({declarations: [MyComp]});
      const template = '<div [style.height.px]="ctxProp"></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxProp = '10';
      fixture.detectChanges();
      expect(fixture.debugElement.children[0].nativeElement.style['height']).toEqual('10px');

      fixture.componentInstance.ctxProp = null!;
      fixture.detectChanges();
      expect(fixture.debugElement.children[0].nativeElement.style['height']).toEqual('');
    });

    it('should consume binding to property names where attr name and property name do not match', () => {
      TestBed.configureTestingModule({declarations: [MyComp]});
      const template = '<div [tabindex]="ctxNumProp"></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.detectChanges();
      expect(fixture.debugElement.children[0].nativeElement.tabIndex).toEqual(0);

      fixture.componentInstance.ctxNumProp = 5;
      fixture.detectChanges();
      expect(fixture.debugElement.children[0].nativeElement.tabIndex).toEqual(5);
    });

    it('should consume binding to camel-cased properties', () => {
      TestBed.configureTestingModule({declarations: [MyComp]});
      const template = '<input [readOnly]="ctxBoolProp">';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.detectChanges();
      expect(fixture.debugElement.children[0].nativeElement.readOnly).toBeFalsy();

      fixture.componentInstance.ctxBoolProp = true;
      fixture.detectChanges();
      expect(fixture.debugElement.children[0].nativeElement.readOnly).toBeTruthy();
    });

    it('should consume binding to innerHtml', () => {
      TestBed.configureTestingModule({declarations: [MyComp]});
      const template = '<div innerHtml="{{ctxProp}}"></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxProp = 'Some <span>HTML</span>';
      fixture.detectChanges();
      expect(fixture.debugElement.children[0].nativeElement.innerHTML).toEqual(
        'Some <span>HTML</span>',
      );

      fixture.componentInstance.ctxProp = 'Some other <div>HTML</div>';
      fixture.detectChanges();
      expect(fixture.debugElement.children[0].nativeElement.innerHTML).toEqual(
        'Some other <div>HTML</div>',
      );
    });

    it('should consume binding to htmlFor using for alias', () => {
      const template = '<label [for]="ctxProp"></label>';
      const fixture = TestBed.configureTestingModule({declarations: [MyComp]})
        .overrideComponent(MyComp, {set: {template}})
        .createComponent(MyComp);

      const nativeEl = fixture.debugElement.children[0].nativeElement;
      fixture.debugElement.componentInstance.ctxProp = 'foo';
      fixture.detectChanges();

      expect(nativeEl.htmlFor).toBe('foo');
    });

    it('should consume directive watch expression change.', () => {
      TestBed.configureTestingModule({declarations: [MyComp, MyDir]});
      const template =
        '<span>' +
        '<div my-dir [elprop]="ctxProp"></div>' +
        '<div my-dir elprop="Hi there!"></div>' +
        '<div my-dir elprop="Hi {{\'there!\'}}"></div>' +
        '<div my-dir elprop="One more {{ctxProp}}"></div>' +
        '</span>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxProp = 'Hello World!';
      fixture.detectChanges();

      const containerSpan = fixture.debugElement.children[0];

      expect(containerSpan.children[0].injector.get(MyDir).dirProp).toEqual('Hello World!');
      expect(containerSpan.children[1].injector.get(MyDir).dirProp).toEqual('Hi there!');
      expect(containerSpan.children[2].injector.get(MyDir).dirProp).toEqual('Hi there!');
      expect(containerSpan.children[3].injector.get(MyDir).dirProp).toEqual(
        'One more Hello World!',
      );
    });

    describe('pipes', () => {
      it('should support pipes in bindings', () => {
        TestBed.configureTestingModule({declarations: [MyComp, MyDir, DoublePipe]});
        const template = '<div my-dir #dir="mydir" [elprop]="ctxProp | double"></div>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        fixture.componentInstance.ctxProp = 'a';
        fixture.detectChanges();

        const dir = fixture.debugElement.children[0].references!['dir'];
        expect(dir.dirProp).toEqual('aa');
      });
    });

    it('should support nested components.', () => {
      TestBed.configureTestingModule({declarations: [MyComp, ChildComp]});
      const template = '<child-cmp></child-cmp>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.detectChanges();

      expect(fixture.nativeElement).toHaveText('hello');
    });

    // GH issue 328 - https://github.com/angular/angular/issues/328
    it('should support different directive types on a single node', () => {
      TestBed.configureTestingModule({declarations: [MyComp, ChildComp, MyDir]});
      const template = '<child-cmp my-dir [elprop]="ctxProp"></child-cmp>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxProp = 'Hello World!';
      fixture.detectChanges();

      const tc = fixture.debugElement.children[0];

      expect(tc.injector.get(MyDir).dirProp).toEqual('Hello World!');
      expect(tc.injector.get(ChildComp).dirProp).toEqual(null);
    });

    it('should support directives where a binding attribute is not given', () => {
      TestBed.configureTestingModule({declarations: [MyComp, MyDir]});
      const template = '<p my-dir></p>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);
    });

    it('should execute a given directive once, even if specified multiple times', () => {
      TestBed.configureTestingModule({
        declarations: [MyComp, DuplicateDir, DuplicateDir, [DuplicateDir, [DuplicateDir]]],
      });
      const template = '<p no-duplicate></p>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);
      expect(fixture.nativeElement).toHaveText('noduplicate');
    });

    it('should support directives where a selector matches property binding', () => {
      TestBed.configureTestingModule({declarations: [MyComp, IdDir]});
      const template = '<p [id]="ctxProp"></p>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      const tc = fixture.debugElement.children[0];
      const idDir = tc.injector.get(IdDir);

      fixture.componentInstance.ctxProp = 'some_id';
      fixture.detectChanges();
      expect(idDir.id).toEqual('some_id');

      fixture.componentInstance.ctxProp = 'other_id';
      fixture.detectChanges();
      expect(idDir.id).toEqual('other_id');
    });

    it('should support directives where a selector matches event binding', () => {
      TestBed.configureTestingModule({declarations: [MyComp, EventDir]});
      const template = '<p (customEvent)="doNothing()"></p>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      const tc = fixture.debugElement.children[0];
      expect(tc.injector.get(EventDir)).not.toBeNull();
    });

    it('should display correct error message for uninitialized @Output', () => {
      @Component({selector: 'my-uninitialized-output', template: '<p>It works!</p>'})
      class UninitializedOutputComp {
        @Output() customEvent!: EventEmitter<any>;
      }

      const template =
        '<my-uninitialized-output (customEvent)="doNothing()"></my-uninitialized-output>';
      TestBed.overrideComponent(MyComp, {set: {template}});

      TestBed.configureTestingModule({declarations: [MyComp, UninitializedOutputComp]});
      expect(() => TestBed.createComponent(MyComp)).toThrowError(
        "@Output customEvent not initialized in 'UninitializedOutputComp'.",
      );
    });

    it('should read directives metadata from their binding token', () => {
      TestBed.configureTestingModule({declarations: [MyComp, PrivateImpl, NeedsPublicApi]});
      const template = '<div public-api><div needs-public-api></div></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);
    });

    it('should not share empty context for template directives - issue #10045', () => {
      TestBed.configureTestingModule({declarations: [MyComp, PollutedContext, NoContext]});
      const template =
        '<ng-template pollutedContext let-foo="bar">{{foo}}</ng-template><ng-template noContext let-foo="bar">{{foo}}</ng-template>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.detectChanges();
      expect(fixture.nativeElement).toHaveText('baz');
    });

    it('should not detach views in ViewContainers when the parent view is destroyed.', () => {
      TestBed.configureTestingModule({declarations: [MyComp, SomeViewport]});
      const template =
        '<div *ngIf="ctxBoolProp"><ng-template some-viewport let-greeting="someTmpl"><span>{{greeting}}</span></ng-template></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxBoolProp = true;
      fixture.detectChanges();

      const ngIfEl = fixture.debugElement.children[0];
      const someViewport: SomeViewport = ngIfEl.childNodes
        .find((debugElement) => debugElement.nativeNode.nodeType === Node.COMMENT_NODE)!
        .injector.get(SomeViewport);
      expect(someViewport.container.length).toBe(2);
      expect(ngIfEl.children.length).toBe(2);

      fixture.componentInstance.ctxBoolProp = false;
      fixture.detectChanges();

      expect(someViewport.container.length).toBe(2);
      expect(fixture.debugElement.children.length).toBe(0);
    });

    it('should use a comment while stamping out `<ng-template>` elements.', () => {
      const fixture = TestBed.configureTestingModule({declarations: [MyComp]})
        .overrideComponent(MyComp, {set: {template: '<ng-template></ng-template>'}})
        .createComponent(MyComp);

      const childNodesOfWrapper = fixture.nativeElement.childNodes;
      expect(childNodesOfWrapper.length).toBe(1);
      expect(isCommentNode(childNodesOfWrapper[0])).toBe(true);
    });

    it('should allow to transplant TemplateRefs into other ViewContainers', () => {
      TestBed.configureTestingModule({
        declarations: [
          MyComp,
          SomeDirective,
          CompWithHost,
          ToolbarComponent,
          ToolbarViewContainer,
          ToolbarPart,
        ],
        imports: [CommonModule],
        schemas: [NO_ERRORS_SCHEMA],
      });
      const template =
        '<some-directive><toolbar><ng-template toolbarpart let-toolbarProp="toolbarProp">{{ctxProp}},{{toolbarProp}},<cmp-with-host></cmp-with-host></ng-template></toolbar></some-directive>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxProp = 'From myComp';
      fixture.detectChanges();

      expect(fixture.nativeElement).toHaveText(
        'TOOLBAR(From myComp,From toolbar,Component with an injected host)',
      );
    });

    describe('reference bindings', () => {
      it('should assign a component to a ref-', () => {
        TestBed.configureTestingModule({declarations: [MyComp, ChildComp]});
        const template = '<p><child-cmp ref-alice></child-cmp></p>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        expect(fixture.debugElement.children[0].children[0].references!['alice']).toBeInstanceOf(
          ChildComp,
        );
      });

      it('should assign a directive to a ref-', () => {
        TestBed.configureTestingModule({declarations: [MyComp, ExportDir]});
        const template = '<div><div export-dir #localdir="dir"></div></div>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        expect(fixture.debugElement.children[0].children[0].references!['localdir']).toBeInstanceOf(
          ExportDir,
        );
      });

      it('should assign a directive to a ref when it has multiple exportAs names', () => {
        TestBed.configureTestingModule({
          declarations: [MyComp, DirectiveWithMultipleExportAsNames],
        });

        const template = '<div multiple-export-as #x="dirX" #y="dirY"></div>';
        TestBed.overrideComponent(MyComp, {set: {template}});

        const fixture = TestBed.createComponent(MyComp);
        expect(fixture.debugElement.children[0].references!['x']).toBeInstanceOf(
          DirectiveWithMultipleExportAsNames,
        );
        expect(fixture.debugElement.children[0].references!['y']).toBeInstanceOf(
          DirectiveWithMultipleExportAsNames,
        );
      });

      it('should make the assigned component accessible in property bindings, even if they were declared before the component', () => {
        TestBed.configureTestingModule({declarations: [MyComp, ChildComp]});
        const template =
          '<ng-template [ngIf]="true">{{alice.ctxProp}}</ng-template>|{{alice.ctxProp}}|<child-cmp ref-alice></child-cmp>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        fixture.detectChanges();

        expect(fixture.nativeElement).toHaveText('hello|hello|hello');
      });

      it('should assign two component instances each with a ref-', () => {
        TestBed.configureTestingModule({declarations: [MyComp, ChildComp]});
        const template = '<p><child-cmp ref-alice></child-cmp><child-cmp ref-bob></child-cmp></p>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        const pEl = fixture.debugElement.children[0];

        const alice = pEl.children[0].references!['alice'];
        const bob = pEl.children[1].references!['bob'];
        expect(alice).toBeInstanceOf(ChildComp);
        expect(bob).toBeInstanceOf(ChildComp);
        expect(alice).not.toBe(bob);
      });

      it('should assign the component instance to a ref- with shorthand syntax', () => {
        TestBed.configureTestingModule({declarations: [MyComp, ChildComp]});
        const template = '<child-cmp #alice></child-cmp>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        expect(fixture.debugElement.children[0].references!['alice']).toBeInstanceOf(ChildComp);
      });

      it('should assign the element instance to a user-defined variable', () => {
        TestBed.configureTestingModule({declarations: [MyComp]});
        const template = '<div><div ref-alice><i>Hello</i></div></div>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        const value = fixture.debugElement.children[0].children[0].references!['alice'];
        expect(value).not.toBe(null);
        expect(value.tagName.toLowerCase()).toEqual('div');
      });

      it('should assign the TemplateRef to a user-defined variable', () => {
        const fixture = TestBed.configureTestingModule({declarations: [MyComp]})
          .overrideComponent(MyComp, {set: {template: '<ng-template ref-alice></ng-template>'}})
          .createComponent(MyComp);

        const value = fixture.debugElement.childNodes[0].references!['alice'];
        expect(value.createEmbeddedView).toBeTruthy();
      });

      it('should preserve case', () => {
        TestBed.configureTestingModule({declarations: [MyComp, ChildComp]});
        const template = '<p><child-cmp ref-superAlice></child-cmp></p>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        expect(
          fixture.debugElement.children[0].children[0].references!['superAlice'],
        ).toBeInstanceOf(ChildComp);
      });
    });

    describe('OnPush components', () => {
      it('should use ChangeDetectorRef to manually request a check', () => {
        TestBed.configureTestingModule({declarations: [MyComp, [[PushCmpWithRef]]]});
        const template = '<push-cmp-with-ref #cmp></push-cmp-with-ref>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        const cmp = fixture.debugElement.children[0].references!['cmp'];

        fixture.detectChanges();
        expect(cmp.numberOfChecks).toEqual(1);

        fixture.detectChanges();
        expect(cmp.numberOfChecks).toEqual(1);

        cmp.propagate();

        fixture.detectChanges();
        expect(cmp.numberOfChecks).toEqual(2);
      });

      it('should be checked when its bindings got updated', () => {
        TestBed.configureTestingModule({
          declarations: [MyComp, PushCmp, EventCmp],
          imports: [CommonModule],
        });
        const template = '<push-cmp [prop]="ctxProp" #cmp></push-cmp>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        const cmp = fixture.debugElement.children[0].references!['cmp'];

        fixture.componentInstance.ctxProp = 'one';
        fixture.detectChanges();
        expect(cmp.numberOfChecks).toEqual(1);

        fixture.componentInstance.ctxProp = 'two';
        fixture.detectChanges();
        expect(cmp.numberOfChecks).toEqual(2);
      });

      if (getDOM().supportsDOMEvents) {
        it('should allow to destroy a component from within a host event handler', fakeAsync(() => {
          TestBed.configureTestingModule({declarations: [MyComp, [[PushCmpWithHostEvent]]]});
          const template = '<push-cmp-with-host-event></push-cmp-with-host-event>';
          TestBed.overrideComponent(MyComp, {set: {template}});
          const fixture = TestBed.createComponent(MyComp);

          tick();
          fixture.detectChanges();

          const cmpEl = fixture.debugElement.children[0];
          const cmp: PushCmpWithHostEvent = cmpEl.injector.get(PushCmpWithHostEvent);
          cmp.ctxCallback = (_: any) => fixture.destroy();

          expect(() => cmpEl.triggerEventHandler('click', <Event>{})).not.toThrow();
        }));
      }

      it('should be checked when an event is fired', () => {
        TestBed.configureTestingModule({
          declarations: [MyComp, PushCmp, EventCmp],
          imports: [CommonModule],
        });
        const template = '<push-cmp [prop]="ctxProp" #cmp></push-cmp>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        const cmpEl = fixture.debugElement.children[0];
        const cmp = cmpEl.componentInstance;
        fixture.detectChanges();
        fixture.detectChanges();
        expect(cmp.numberOfChecks).toEqual(1);

        // regular element
        cmpEl.children[0].triggerEventHandler('click', <Event>{});
        fixture.detectChanges();
        fixture.detectChanges();
        expect(cmp.numberOfChecks).toEqual(2);

        // element inside of an *ngIf
        cmpEl.children[1].triggerEventHandler('click', <Event>{});
        fixture.detectChanges();
        fixture.detectChanges();
        expect(cmp.numberOfChecks).toEqual(3);

        // element inside a nested component
        cmpEl.children[2].children[0].triggerEventHandler('click', <Event>{});
        fixture.detectChanges();
        fixture.detectChanges();
        expect(cmp.numberOfChecks).toEqual(4);

        // host element
        cmpEl.triggerEventHandler('click', <Event>{});
        fixture.detectChanges();
        fixture.detectChanges();
        expect(cmp.numberOfChecks).toEqual(5);
      });

      it('should not affect updating properties on the component', () => {
        TestBed.configureTestingModule({declarations: [MyComp, [[PushCmpWithRef]]]});
        const template = '<push-cmp-with-ref [prop]="ctxProp" #cmp></push-cmp-with-ref>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        const cmp = fixture.debugElement.children[0].references!['cmp'];

        fixture.componentInstance.ctxProp = 'one';
        fixture.detectChanges();
        expect(cmp.prop).toEqual('one');

        fixture.componentInstance.ctxProp = 'two';
        fixture.detectChanges();
        expect(cmp.prop).toEqual('two');
      });

      it('should be checked when an async pipe requests a check', fakeAsync(() => {
        TestBed.configureTestingModule({
          declarations: [MyComp, PushCmpWithAsyncPipe],
          imports: [CommonModule],
        });
        const template = '<push-cmp-with-async #cmp></push-cmp-with-async>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        tick();

        const cmp: PushCmpWithAsyncPipe = fixture.debugElement.children[0].references!['cmp'];
        fixture.detectChanges();
        expect(cmp.numberOfChecks).toEqual(1);

        fixture.detectChanges();
        fixture.detectChanges();
        expect(cmp.numberOfChecks).toEqual(1);

        cmp.resolve(2);
        tick();

        fixture.detectChanges();
        expect(cmp.numberOfChecks).toEqual(2);
      }));
    });

    it('should create a component that injects an @Host', () => {
      TestBed.configureTestingModule({
        declarations: [MyComp, SomeDirective, CompWithHost],
        schemas: [NO_ERRORS_SCHEMA],
      });
      const template = `
            <some-directive>
              <p>
                <cmp-with-host #child></cmp-with-host>
              </p>
            </some-directive>`;
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      const childComponent =
        fixture.debugElement.children[0].children[0].children[0].references!['child'];
      expect(childComponent.myHost).toBeInstanceOf(SomeDirective);
    });

    it('should create a component that injects an @Host through viewcontainer directive', () => {
      TestBed.configureTestingModule({
        declarations: [MyComp, SomeDirective, CompWithHost],
        schemas: [NO_ERRORS_SCHEMA],
      });
      const template = `
            <some-directive>
              <p *ngIf="true">
                <cmp-with-host #child></cmp-with-host>
              </p>
            </some-directive>`;
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.detectChanges();

      const tc = fixture.debugElement.children[0].children[0].children[0];

      const childComponent = tc.references!['child'];
      expect(childComponent.myHost).toBeInstanceOf(SomeDirective);
    });

    it('should support events via EventEmitter on regular elements', waitForAsync(() => {
      TestBed.configureTestingModule({
        declarations: [MyComp, DirectiveEmittingEvent, DirectiveListeningEvent],
      });
      const template = '<div emitter listener></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      const tc = fixture.debugElement.children[0];
      const emitter = tc.injector.get(DirectiveEmittingEvent);
      const listener = tc.injector.get(DirectiveListeningEvent);

      expect(listener.msg).toEqual('');
      let eventCount = 0;

      emitter.event.subscribe({
        next: () => {
          eventCount++;
          if (eventCount === 1) {
            expect(listener.msg).toEqual('fired !');
            fixture.destroy();
            emitter.fireEvent('fired again !');
          } else {
            expect(listener.msg).toEqual('fired !');
          }
        },
      });

      emitter.fireEvent('fired !');
    }));

    it('should support events via EventEmitter on template elements', waitForAsync(() => {
      const fixture = TestBed.configureTestingModule({
        declarations: [MyComp, DirectiveEmittingEvent, DirectiveListeningEvent],
      })
        .overrideComponent(MyComp, {
          set: {
            template: '<ng-template emitter listener (event)="ctxProp=$event"></ng-template>',
          },
        })
        .createComponent(MyComp);
      const tc = fixture.debugElement.childNodes.find(
        (debugElement) => debugElement.nativeNode.nodeType === Node.COMMENT_NODE,
      )!;

      const emitter = tc.injector.get(DirectiveEmittingEvent);
      const myComp = fixture.debugElement.injector.get(MyComp);
      const listener = tc.injector.get(DirectiveListeningEvent);

      myComp.ctxProp = '';
      expect(listener.msg).toEqual('');

      emitter.event.subscribe({
        next: () => {
          expect(listener.msg).toEqual('fired !');
          expect(myComp.ctxProp).toEqual('fired !');
        },
      });

      emitter.fireEvent('fired !');
    }));

    it('should support [()] syntax', waitForAsync(() => {
      TestBed.configureTestingModule({declarations: [MyComp, DirectiveWithTwoWayBinding]});
      const template = '<div [(control)]="ctxProp" two-way></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);
      const tc = fixture.debugElement.children[0];
      const dir = tc.injector.get(DirectiveWithTwoWayBinding);

      fixture.componentInstance.ctxProp = 'one';
      fixture.detectChanges();

      expect(dir.control).toEqual('one');

      dir.controlChange.subscribe({
        next: () => {
          expect(fixture.componentInstance.ctxProp).toEqual('two');
        },
      });

      dir.triggerChange('two');
    }));

    it('should support render events', () => {
      TestBed.configureTestingModule({declarations: [MyComp, DirectiveListeningDomEvent]});
      const template = '<div listener></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      const tc = fixture.debugElement.children[0];
      const listener = tc.injector.get(DirectiveListeningDomEvent);

      dispatchEvent(tc.nativeElement, 'domEvent');

      expect(listener.eventTypes).toEqual([
        'domEvent',
        'body_domEvent',
        'document_domEvent',
        'window_domEvent',
      ]);

      fixture.destroy();
      listener.eventTypes = [];
      dispatchEvent(tc.nativeElement, 'domEvent');
      expect(listener.eventTypes).toEqual([]);
    });

    it('should support render global events', () => {
      TestBed.configureTestingModule({declarations: [MyComp, DirectiveListeningDomEvent]});
      const template = '<div listener></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);
      const doc = TestBed.inject(DOCUMENT);

      const tc = fixture.debugElement.children[0];
      const listener = tc.injector.get(DirectiveListeningDomEvent);
      dispatchEvent(getDOM().getGlobalEventTarget(doc, 'window'), 'domEvent');
      expect(listener.eventTypes).toEqual(['window_domEvent']);

      listener.eventTypes = [];
      dispatchEvent(getDOM().getGlobalEventTarget(doc, 'document'), 'domEvent');
      expect(listener.eventTypes).toEqual(['document_domEvent', 'window_domEvent']);

      fixture.destroy();
      listener.eventTypes = [];
      dispatchEvent(getDOM().getGlobalEventTarget(doc, 'body'), 'domEvent');
      expect(listener.eventTypes).toEqual([]);
    });

    it('should support updating host element via hostAttributes on root elements', () => {
      @Component({host: {'role': 'button'}, template: ''})
      class ComponentUpdatingHostAttributes {}

      TestBed.configureTestingModule({declarations: [ComponentUpdatingHostAttributes]});
      const fixture = TestBed.createComponent(ComponentUpdatingHostAttributes);

      fixture.detectChanges();

      expect(fixture.debugElement.nativeElement.getAttribute('role')).toEqual('button');
    });

    it('should support updating host element via hostAttributes on host elements', () => {
      TestBed.configureTestingModule({declarations: [MyComp, DirectiveUpdatingHostAttributes]});
      const template = '<div update-host-attributes></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.detectChanges();

      expect(fixture.debugElement.children[0].nativeElement.getAttribute('role')).toEqual('button');
    });

    it('should support updating host element via hostProperties', () => {
      TestBed.configureTestingModule({declarations: [MyComp, DirectiveUpdatingHostProperties]});
      const template = '<div update-host-properties></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      const tc = fixture.debugElement.children[0];
      const updateHost = tc.injector.get(DirectiveUpdatingHostProperties);

      updateHost.id = 'newId';

      fixture.detectChanges();

      expect(tc.nativeElement.id).toEqual('newId');
    });

    it('should not use template variables for expressions in hostProperties', () => {
      @Directive({selector: '[host-properties]', host: {'[id]': 'id', '[title]': 'unknownProp'}})
      class DirectiveWithHostProps {
        id = 'one';
        unknownProp = 'unknownProp';
      }

      const fixture = TestBed.configureTestingModule({
        declarations: [MyComp, DirectiveWithHostProps],
      })
        .overrideComponent(MyComp, {
          set: {template: `<div *ngFor="let id of ['forId']" host-properties></div>`},
        })
        .createComponent(MyComp);
      fixture.detectChanges();

      const tc = fixture.debugElement.children[0];
      expect(tc.properties['id']).toBe('one');
      expect(tc.properties['title']).toBe('unknownProp');
    });

    it('should not allow pipes in hostProperties', () => {
      @Directive({selector: '[host-properties]', host: {'[id]': 'id | uppercase'}})
      class DirectiveWithHostProps {}

      TestBed.configureTestingModule({declarations: [MyComp, DirectiveWithHostProps]});
      const template = '<div host-properties></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      expect(() => TestBed.createComponent(MyComp)).toThrowError(
        /Host binding expression cannot contain pipes/,
      );
    });

    it('should not use template variables for expressions in hostListeners', () => {
      @Directive({selector: '[host-listener]', host: {'(click)': 'doIt(id, unknownProp)'}})
      class DirectiveWithHostListener {
        id = 'one';
        receivedArgs: any[] = [];

        doIt(...args: any[]) {
          this.receivedArgs = args;
        }
      }

      const fixture = TestBed.configureTestingModule({
        declarations: [MyComp, DirectiveWithHostListener],
      })
        .overrideComponent(MyComp, {
          set: {template: `<div *ngFor="let id of ['forId']" host-listener></div>`},
        })
        .createComponent(MyComp);
      fixture.detectChanges();
      const tc = fixture.debugElement.children[0];
      tc.triggerEventHandler('click', {});
      const dir: DirectiveWithHostListener = tc.injector.get(DirectiveWithHostListener);
      expect(dir.receivedArgs).toEqual(['one', undefined]);
    });

    it('should not allow pipes in hostListeners', () => {
      @Directive({selector: '[host-listener]', host: {'(click)': 'doIt() | somePipe'}})
      class DirectiveWithHostListener {}

      TestBed.configureTestingModule({declarations: [MyComp, DirectiveWithHostListener]});
      const template = '<div host-listener></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      expect(() => TestBed.createComponent(MyComp)).toThrowError(
        /Cannot have a pipe in an action expression/,
      );
    });

    if (getDOM().supportsDOMEvents) {
      it('should support preventing default on render events', () => {
        TestBed.configureTestingModule({
          declarations: [
            MyComp,
            DirectiveListeningDomEventPrevent,
            DirectiveListeningDomEventNoPrevent,
          ],
        });
        const template =
          '<input type="checkbox" listenerprevent><input type="checkbox" listenernoprevent>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        const dispatchedEvent = createMouseEvent('click');
        const dispatchedEvent2 = createMouseEvent('click');
        getDOM().dispatchEvent(fixture.debugElement.children[0].nativeElement, dispatchedEvent);
        getDOM().dispatchEvent(fixture.debugElement.children[1].nativeElement, dispatchedEvent2);
        expect(isPrevented(dispatchedEvent)).toBe(true);
        expect(isPrevented(dispatchedEvent2)).toBe(false);
        expect(fixture.debugElement.children[0].nativeElement.checked).toBeFalsy();
        expect(fixture.debugElement.children[1].nativeElement.checked).toBeTruthy();
      });
    }

    it('should support render global events from multiple directives', () => {
      TestBed.configureTestingModule({
        declarations: [MyComp, DirectiveListeningDomEvent, DirectiveListeningDomEventOther],
      });
      const template = '<div *ngIf="ctxBoolProp" listener listenerother></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);
      const doc = TestBed.inject(DOCUMENT);

      globalCounter = 0;
      fixture.componentInstance.ctxBoolProp = true;
      fixture.detectChanges();

      const tc = fixture.debugElement.children[0];

      const listener = tc.injector.get(DirectiveListeningDomEvent);
      const listenerother = tc.injector.get(DirectiveListeningDomEventOther);
      dispatchEvent(getDOM().getGlobalEventTarget(doc, 'window'), 'domEvent');
      expect(listener.eventTypes).toEqual(['window_domEvent']);
      expect(listenerother.eventType).toEqual('other_domEvent');
      expect(globalCounter).toEqual(1);

      fixture.componentInstance.ctxBoolProp = false;
      fixture.detectChanges();
      dispatchEvent(getDOM().getGlobalEventTarget(doc, 'window'), 'domEvent');
      expect(globalCounter).toEqual(1);

      fixture.componentInstance.ctxBoolProp = true;
      fixture.detectChanges();
      dispatchEvent(getDOM().getGlobalEventTarget(doc, 'window'), 'domEvent');
      expect(globalCounter).toEqual(2);

      // need to destroy to release all remaining global event listeners
      fixture.destroy();
    });

    describe('ViewContainerRef', () => {
      beforeEach(() => {
        TestBed.configureTestingModule({
          declarations: [MyComp, DynamicViewport, ChildCompUsingService],
        });
        TestBed.overrideComponent(MyComp, {
          add: {template: '<div><dynamic-vp #dynamic></dynamic-vp></div>'},
        });
      });

      describe('.createComponent', () => {
        it('should allow to create a component at any bound location', waitForAsync(() => {
          const fixture = TestBed.configureTestingModule({
            schemas: [NO_ERRORS_SCHEMA],
          }).createComponent(MyComp);
          const tc = fixture.debugElement.children[0].children[0];
          const dynamicVp: DynamicViewport = tc.injector.get(DynamicViewport);
          dynamicVp.create();
          fixture.detectChanges();
          expect(fixture.debugElement.children[0].children[1].nativeElement).toHaveText(
            'dynamic greet',
          );
        }));

        it('should allow to create multiple components at a location', waitForAsync(() => {
          const fixture = TestBed.configureTestingModule({
            schemas: [NO_ERRORS_SCHEMA],
          }).createComponent(MyComp);
          const tc = fixture.debugElement.children[0].children[0];
          const dynamicVp: DynamicViewport = tc.injector.get(DynamicViewport);
          dynamicVp.create();
          dynamicVp.create();
          fixture.detectChanges();
          expect(fixture.debugElement.children[0].children[1].nativeElement).toHaveText(
            'dynamic greet',
          );
          expect(fixture.debugElement.children[0].children[2].nativeElement).toHaveText(
            'dynamic greet',
          );
        }));

        it('should create a component that has been freshly compiled', () => {
          @Component({template: ''})
          class RootComp {
            constructor(public vc: ViewContainerRef) {}
          }

          @NgModule({
            declarations: [RootComp],
            providers: [{provide: 'someToken', useValue: 'someRootValue'}],
          })
          class RootModule {}

          @Component({template: ''})
          class MyComp {
            constructor(@Inject('someToken') public someToken: string) {}
          }

          @NgModule({
            declarations: [MyComp],
            providers: [{provide: 'someToken', useValue: 'someValue'}],
          })
          class MyModule {}

          const compFixture = TestBed.configureTestingModule({
            imports: [RootModule],
          }).createComponent(RootComp);
          const compiler = TestBed.inject(Compiler);
          const myCompFactory = <ComponentFactory<MyComp>>(
            compiler.compileModuleAndAllComponentsSync(MyModule).componentFactories[0]
          );

          // Note: the ComponentFactory was created directly via the compiler, i.e. it
          // does not have an association to an NgModuleRef.
          // -> expect the providers of the module that the view container belongs to.
          const compRef = compFixture.componentInstance.vc.createComponent(myCompFactory);
          expect(compRef.instance.someToken).toBe('someRootValue');
        });

        it('should create a component with the passed NgModuleRef', () => {
          @Component({template: ''})
          class RootComp {
            constructor(public vc: ViewContainerRef) {}
          }

          @Component({template: ''})
          class MyComp {
            constructor(@Inject('someToken') public someToken: string) {}
          }

          @NgModule({
            declarations: [RootComp, MyComp],
            providers: [{provide: 'someToken', useValue: 'someRootValue'}],
          })
          class RootModule {}

          @NgModule({providers: [{provide: 'someToken', useValue: 'someValue'}]})
          class MyModule {}

          const compFixture = TestBed.configureTestingModule({
            imports: [RootModule],
          }).createComponent(RootComp);
          const compiler = TestBed.inject(Compiler);
          const myModule = compiler
            .compileModuleSync(MyModule)
            .create(TestBed.inject(NgModuleRef).injector);

          // Note: MyComp was declared as entryComponent in the RootModule,
          // but we pass MyModule to the createComponent call.
          // -> expect the providers of MyModule!
          const compRef = compFixture.componentInstance.vc.createComponent(MyComp, {
            ngModuleRef: myModule,
          });
          expect(compRef.instance.someToken).toBe('someValue');
        });

        it('should create a component with the NgModuleRef of the ComponentFactoryResolver', () => {
          @Component({template: ''})
          class RootComp {
            constructor(public vc: ViewContainerRef) {}
          }

          @NgModule({
            declarations: [RootComp],
            providers: [{provide: 'someToken', useValue: 'someRootValue'}],
          })
          class RootModule {}

          @Component({template: ''})
          class MyComp {
            constructor(@Inject('someToken') public someToken: string) {}
          }

          @NgModule({
            declarations: [MyComp],
            providers: [{provide: 'someToken', useValue: 'someValue'}],
          })
          class MyModule {}

          const compFixture = TestBed.configureTestingModule({
            imports: [RootModule],
          }).createComponent(RootComp);
          const compiler = TestBed.inject(Compiler);
          const myModule = compiler
            .compileModuleSync(MyModule)
            .create(TestBed.inject(NgModuleRef).injector);
          const myCompFactory = myModule.componentFactoryResolver.resolveComponentFactory(MyComp);

          // Note: MyComp was declared as entryComponent in MyModule,
          // and we don't pass an explicit ModuleRef to the createComponent call.
          // -> expect the providers of MyModule!
          const compRef = compFixture.componentInstance.vc.createComponent(myCompFactory);
          expect(compRef.instance.someToken).toBe('someValue');
        });
      });

      describe('.insert', () => {
        it('should throw with destroyed views', waitForAsync(() => {
          const fixture = TestBed.configureTestingModule({
            schemas: [NO_ERRORS_SCHEMA],
          }).createComponent(MyComp);
          const tc = fixture.debugElement.children[0].children[0];
          const dynamicVp: DynamicViewport = tc.injector.get(DynamicViewport);
          const ref = dynamicVp.create();
          fixture.detectChanges();

          ref.destroy();
          expect(() => {
            dynamicVp.insert(ref.hostView);
          }).toThrowError('Cannot insert a destroyed View in a ViewContainer!');
        }));
      });

      describe('.move', () => {
        it('should throw with destroyed views', waitForAsync(() => {
          const fixture = TestBed.configureTestingModule({
            schemas: [NO_ERRORS_SCHEMA],
          }).createComponent(MyComp);
          const tc = fixture.debugElement.children[0].children[0];
          const dynamicVp: DynamicViewport = tc.injector.get(DynamicViewport);
          const ref = dynamicVp.create();
          fixture.detectChanges();

          ref.destroy();
          expect(() => {
            dynamicVp.move(ref.hostView, 1);
          }).toThrowError('Cannot move a destroyed View in a ViewContainer!');
        }));
      });
    });

    it('should support static attributes', () => {
      TestBed.configureTestingModule({declarations: [MyComp, NeedsAttribute]});
      const template = '<input static type="text" title>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      const tc = fixture.debugElement.children[0];
      const needsAttribute = tc.injector.get(NeedsAttribute);
      expect(needsAttribute.typeAttribute).toEqual('text');
      expect(needsAttribute.staticAttribute).toEqual('');
      expect(needsAttribute.fooAttribute).toBeNull();
    });

    it('should support custom interpolation', () => {
      TestBed.configureTestingModule({
        declarations: [
          MyComp,
          ComponentWithCustomInterpolationA,
          ComponentWithCustomInterpolationB,
          ComponentWithDefaultInterpolation,
        ],
      });
      const template = `<div>{{ctxProp}}</div>
<cmp-with-custom-interpolation-a></cmp-with-custom-interpolation-a>
<cmp-with-custom-interpolation-b></cmp-with-custom-interpolation-b>`;
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxProp = 'Default Interpolation';

      fixture.detectChanges();
      expect(fixture.nativeElement).toHaveText(
        'Default InterpolationCustom Interpolation ACustom Interpolation B (Default Interpolation)',
      );
    });
  });

  describe('dependency injection', () => {
    it('should support bindings', () => {
      TestBed.configureTestingModule({
        declarations: [MyComp, DirectiveProvidingInjectable, DirectiveConsumingInjectable],
        schemas: [NO_ERRORS_SCHEMA],
      });
      const template = `
            <directive-providing-injectable >
              <directive-consuming-injectable #consuming>
              </directive-consuming-injectable>
            </directive-providing-injectable>
          `;
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      const comp = fixture.debugElement.children[0].children[0].references['consuming'];
      expect(comp.injectable).toBeInstanceOf(InjectableService);
    });

    it('should support viewProviders', () => {
      TestBed.configureTestingModule({
        declarations: [MyComp, DirectiveProvidingInjectableInView, DirectiveConsumingInjectable],
        schemas: [NO_ERRORS_SCHEMA],
      });
      const template = `
              <directive-consuming-injectable #consuming>
              </directive-consuming-injectable>
          `;
      TestBed.overrideComponent(DirectiveProvidingInjectableInView, {set: {template}});
      const fixture = TestBed.createComponent(DirectiveProvidingInjectableInView);

      const comp = fixture.debugElement.children[0].references['consuming'];
      expect(comp.injectable).toBeInstanceOf(InjectableService);
    });

    it('should support unbounded lookup', () => {
      TestBed.configureTestingModule({
        declarations: [
          MyComp,
          DirectiveProvidingInjectable,
          DirectiveContainingDirectiveConsumingAnInjectable,
          DirectiveConsumingInjectableUnbounded,
        ],
        schemas: [NO_ERRORS_SCHEMA],
      });
      const template = `
            <directive-providing-injectable>
              <directive-containing-directive-consuming-an-injectable #dir>
              </directive-containing-directive-consuming-an-injectable>
            </directive-providing-injectable>
          `;
      TestBed.overrideComponent(MyComp, {set: {template}});
      TestBed.overrideComponent(DirectiveContainingDirectiveConsumingAnInjectable, {
        set: {
          template: `
            <directive-consuming-injectable-unbounded></directive-consuming-injectable-unbounded>
          `,
        },
      });
      const fixture = TestBed.createComponent(MyComp);

      const comp = fixture.debugElement.children[0].children[0].references['dir'];
      expect(comp.directive.injectable).toBeInstanceOf(InjectableService);
    });

    it('should support the event-bus scenario', () => {
      TestBed.configureTestingModule({
        declarations: [
          MyComp,
          GrandParentProvidingEventBus,
          ParentProvidingEventBus,
          ChildConsumingEventBus,
        ],
        schemas: [NO_ERRORS_SCHEMA],
      });
      const template = `
            <grand-parent-providing-event-bus>
              <parent-providing-event-bus>
                <child-consuming-event-bus>
                </child-consuming-event-bus>
              </parent-providing-event-bus>
            </grand-parent-providing-event-bus>
          `;
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      const gpComp = fixture.debugElement.children[0];
      const parentComp = gpComp.children[0];
      const childComp = parentComp.children[0];

      const grandParent = gpComp.injector.get(GrandParentProvidingEventBus);
      const parent = parentComp.injector.get(ParentProvidingEventBus);
      const child = childComp.injector.get(ChildConsumingEventBus);

      expect(grandParent.bus.name).toEqual('grandparent');
      expect(parent.bus.name).toEqual('parent');
      expect(parent.grandParentBus).toBe(grandParent.bus);
      expect(child.bus).toBe(parent.bus);
    });

    it('should instantiate bindings lazily', () => {
      TestBed.configureTestingModule({
        declarations: [MyComp, DirectiveConsumingInjectable, ComponentProvidingLoggingInjectable],
        schemas: [NO_ERRORS_SCHEMA],
      });
      const template = `
              <component-providing-logging-injectable #providing>
                <directive-consuming-injectable *ngIf="ctxBoolProp">
                </directive-consuming-injectable>
              </component-providing-logging-injectable>
          `;
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      const providing = fixture.debugElement.children[0].references['providing'];
      expect(providing.created).toBe(false);

      fixture.componentInstance.ctxBoolProp = true;
      fixture.detectChanges();

      expect(providing.created).toBe(true);
    });
  });

  describe('corner cases', () => {
    it('should remove script tags from templates', () => {
      TestBed.configureTestingModule({declarations: [MyComp]});
      const template = `
            <script>alert("Ooops");</script>
            <div>before<script>alert("Ooops");</script><span>inside</span>after</div>`;
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      expect(fixture.nativeElement.querySelectorAll('script').length).toEqual(0);
    });

    it('should throw when using directives without selector in NgModule declarations', () => {
      @Directive({})
      class SomeDirective {}

      @Component({selector: 'comp', template: ''})
      class SomeComponent {}

      TestBed.configureTestingModule({declarations: [MyComp, SomeDirective, SomeComponent]});
      expect(() => TestBed.createComponent(MyComp)).toThrowError(
        `Directive ${stringify(SomeDirective)} has no selector, please add it!`,
      );
    });

    it('should not throw when using directives without selector as base class not in declarations', () => {
      @Directive({})
      abstract class Base {
        constructor(readonly injector: Injector) {}
      }

      @Directive()
      abstract class EmptyDir {}

      @Directive({inputs: ['a', 'b']})
      class TestDirWithInputs {}

      @Component({selector: 'comp', template: ''})
      class SomeComponent extends Base {}

      @Component({selector: 'comp2', template: ''})
      class SomeComponent2 extends EmptyDir {}

      @Component({selector: 'comp3', template: ''})
      class SomeComponent3 extends TestDirWithInputs {}

      TestBed.configureTestingModule({
        declarations: [MyComp, SomeComponent, SomeComponent2, SomeComponent3],
      });
      expect(() => TestBed.createComponent(MyComp)).not.toThrowError();
    });

    it('should throw when using directives with empty string selector', () => {
      @Directive({selector: ''})
      class SomeDirective {}

      @Component({selector: 'comp', template: ''})
      class SomeComponent {}

      TestBed.configureTestingModule({declarations: [MyComp, SomeDirective, SomeComponent]});
      expect(() => TestBed.createComponent(MyComp)).toThrowError(
        `Directive ${stringify(SomeDirective)} has no selector, please add it!`,
      );
    });

    it('should use a default element name for components without selectors', () => {
      @Component({template: '----'})
      class NoSelectorComponent {}

      expect(reflectComponentType(NoSelectorComponent)?.selector).toBe('ng-component');

      expect(
        createComponent(NoSelectorComponent, {
          environmentInjector: TestBed.inject(EnvironmentInjector),
        }).location.nativeElement.nodeName.toLowerCase(),
      ).toEqual('ng-component');
    });
  });

  describe('error handling', () => {
    it('should report a meaningful error when a directive is missing annotation', () => {
      TestBed.configureTestingModule({declarations: [MyComp, SomeDirectiveMissingAnnotation]});

      expect(() => TestBed.createComponent(MyComp)).toThrowError(
        `Unexpected value '${stringify(
          SomeDirectiveMissingAnnotation,
        )}' declared by the module 'DynamicTestModule'. Please add a @Pipe/@Directive/@Component annotation.`,
      );
    });

    it('should report a meaningful error when a component is missing view annotation', () => {
      TestBed.configureTestingModule({declarations: [MyComp, ComponentWithoutView]});
      try {
        TestBed.createComponent(ComponentWithoutView);
      } catch (e) {
        expect((e as Error).message).toContain(
          `No template specified for component ${stringify(ComponentWithoutView)}`,
        );
      }
    });
  });

  it('should support imperative views', () => {
    TestBed.configureTestingModule({declarations: [MyComp, SimpleImperativeViewComponent]});
    const template = '<simple-imp-cmp></simple-imp-cmp>';
    TestBed.overrideComponent(MyComp, {set: {template}});
    const fixture = TestBed.createComponent(MyComp);

    expect(fixture.nativeElement).toHaveText('hello imp view');
  });

  it('should support moving embedded views around', () => {
    TestBed.configureTestingModule({
      declarations: [MyComp, SomeImperativeViewport],
      providers: [{provide: ANCHOR_ELEMENT, useValue: el('<div></div>')}],
    });
    const template = '<div><div *someImpvp="ctxBoolProp">hello</div></div>';
    TestBed.overrideComponent(MyComp, {set: {template}});
    const anchorElement = getTestBed().get(ANCHOR_ELEMENT);
    const fixture = TestBed.createComponent(MyComp);

    fixture.detectChanges();
    expect(anchorElement).toHaveText('');

    fixture.componentInstance.ctxBoolProp = true;
    fixture.detectChanges();

    expect(anchorElement).toHaveText('hello');

    fixture.componentInstance.ctxBoolProp = false;
    fixture.detectChanges();
    expect(fixture.nativeElement).toHaveText('');
  });

  describe('moving embedded views of projectable nodes in a dynamic component', () => {
    @Component({selector: 'menu-item', template: ''})
    class DynamicMenuItem {
      @ViewChild('templateRef', {static: true}) templateRef!: TemplateRef<any>;
      itemContent: string | undefined;
    }

    @Component({selector: 'test', template: `<ng-container #menuItemsContainer></ng-container>`})
    class TestCmp {
      constructor(public cfr: ComponentFactoryResolver) {}
      @ViewChild('menuItemsContainer', {static: true, read: ViewContainerRef})
      menuItemsContainer!: ViewContainerRef;
    }

    beforeEach(() => {
      TestBed.configureTestingModule({declarations: [TestCmp, DynamicMenuItem]});
    });

    const createElWithContent = (content: string, tagName = 'span') => {
      const element = document.createElement(tagName);
      element.textContent = content;
      return element;
    };

    it('should support moving embedded views of projectable nodes', () => {
      TestBed.overrideTemplate(
        DynamicMenuItem,
        `<ng-template #templateRef><ng-content></ng-content></ng-template>`,
      );

      const fixture = TestBed.createComponent(TestCmp);
      const menuItemsContainer = fixture.componentInstance.menuItemsContainer;
      const dynamicCmptFactory =
        fixture.componentInstance.cfr.resolveComponentFactory(DynamicMenuItem);

      const cmptRefWithAa = dynamicCmptFactory.create(Injector.NULL, [[createElWithContent('Aa')]]);
      const cmptRefWithBb = dynamicCmptFactory.create(Injector.NULL, [[createElWithContent('Bb')]]);
      const cmptRefWithCc = dynamicCmptFactory.create(Injector.NULL, [[createElWithContent('Cc')]]);

      menuItemsContainer.insert(cmptRefWithAa.instance.templateRef.createEmbeddedView({}));
      menuItemsContainer.insert(cmptRefWithBb.instance.templateRef.createEmbeddedView({}));
      menuItemsContainer.insert(cmptRefWithCc.instance.templateRef.createEmbeddedView({}));

      menuItemsContainer.move(menuItemsContainer.get(0)!, 1);
      expect(fixture.nativeElement.textContent).toBe('BbAaCc');
      menuItemsContainer.move(menuItemsContainer.get(2)!, 1);
      expect(fixture.nativeElement.textContent).toBe('BbCcAa');
    });

    it('should support moving embedded views of projectable nodes in multiple slots', () => {
      TestBed.overrideTemplate(
        DynamicMenuItem,
        `<ng-template #templateRef><ng-content select="span"></ng-content><ng-content select="button"></ng-content></ng-template>`,
      );

      const fixture = TestBed.createComponent(TestCmp);
      const menuItemsContainer = fixture.componentInstance.menuItemsContainer;
      const dynamicCmptFactory =
        fixture.componentInstance.cfr.resolveComponentFactory(DynamicMenuItem);

      const cmptRefWithAa = dynamicCmptFactory.create(Injector.NULL, [
        [createElWithContent('A')],
        [createElWithContent('a', 'button')],
      ]);
      const cmptRefWithBb = dynamicCmptFactory.create(Injector.NULL, [
        [createElWithContent('B')],
        [createElWithContent('b', 'button')],
      ]);
      const cmptRefWithCc = dynamicCmptFactory.create(Injector.NULL, [
        [createElWithContent('C')],
        [createElWithContent('c', 'button')],
      ]);

      menuItemsContainer.insert(cmptRefWithAa.instance.templateRef.createEmbeddedView({}));
      menuItemsContainer.insert(cmptRefWithBb.instance.templateRef.createEmbeddedView({}));
      menuItemsContainer.insert(cmptRefWithCc.instance.templateRef.createEmbeddedView({}));

      menuItemsContainer.move(menuItemsContainer.get(0)!, 1);
      expect(fixture.nativeElement.textContent).toBe('BbAaCc');
      menuItemsContainer.move(menuItemsContainer.get(2)!, 1);
      expect(fixture.nativeElement.textContent).toBe('BbCcAa');
    });

    it('should support moving embedded views of projectable nodes in multiple slots and interpolations', () => {
      TestBed.overrideTemplate(
        DynamicMenuItem,
        `<ng-template #templateRef><ng-content select="span"></ng-content>{{itemContent}}<ng-content select="button"></ng-content></ng-template>`,
      );

      TestBed.configureTestingModule({declarations: [TestCmp, DynamicMenuItem]});

      const fixture = TestBed.createComponent(TestCmp);
      const menuItemsContainer = fixture.componentInstance.menuItemsContainer;
      const dynamicCmptFactory =
        fixture.componentInstance.cfr.resolveComponentFactory(DynamicMenuItem);

      const cmptRefWithAa = dynamicCmptFactory.create(Injector.NULL, [
        [createElWithContent('A')],
        [createElWithContent('a', 'button')],
      ]);
      const cmptRefWithBb = dynamicCmptFactory.create(Injector.NULL, [
        [createElWithContent('B')],
        [createElWithContent('b', 'button')],
      ]);
      const cmptRefWithCc = dynamicCmptFactory.create(Injector.NULL, [
        [createElWithContent('C')],
        [createElWithContent('c', 'button')],
      ]);

      menuItemsContainer.insert(cmptRefWithAa.instance.templateRef.createEmbeddedView({}));
      menuItemsContainer.insert(cmptRefWithBb.instance.templateRef.createEmbeddedView({}));
      menuItemsContainer.insert(cmptRefWithCc.instance.templateRef.createEmbeddedView({}));

      cmptRefWithAa.instance.itemContent = '0';
      cmptRefWithBb.instance.itemContent = '1';
      cmptRefWithCc.instance.itemContent = '2';

      fixture.detectChanges();

      menuItemsContainer.move(menuItemsContainer.get(0)!, 1);
      expect(fixture.nativeElement.textContent).toBe('B1bA0aC2c');
      menuItemsContainer.move(menuItemsContainer.get(2)!, 1);
      expect(fixture.nativeElement.textContent).toBe('B1bC2cA0a');
    });

    it('should support moving embedded views with empty projectable slots', () => {
      TestBed.overrideTemplate(
        DynamicMenuItem,
        `<ng-template #templateRef><ng-content></ng-content></ng-template>`,
      );

      const fixture = TestBed.createComponent(TestCmp);
      const menuItemsContainer = fixture.componentInstance.menuItemsContainer;
      const dynamicCmptFactory =
        fixture.componentInstance.cfr.resolveComponentFactory(DynamicMenuItem);

      const cmptRefWithAa = dynamicCmptFactory.create(Injector.NULL, [[]]);
      const cmptRefWithBb = dynamicCmptFactory.create(Injector.NULL, [[createElWithContent('Bb')]]);
      const cmptRefWithCc = dynamicCmptFactory.create(Injector.NULL, [[createElWithContent('Cc')]]);

      menuItemsContainer.insert(cmptRefWithAa.instance.templateRef.createEmbeddedView({}));
      menuItemsContainer.insert(cmptRefWithBb.instance.templateRef.createEmbeddedView({}));
      menuItemsContainer.insert(cmptRefWithCc.instance.templateRef.createEmbeddedView({}));

      menuItemsContainer.move(menuItemsContainer.get(0)!, 1); // [ Bb, NULL, Cc]
      expect(fixture.nativeElement.textContent).toBe('BbCc');
      menuItemsContainer.move(menuItemsContainer.get(2)!, 1); // [ Bb, Cc, NULL]
      expect(fixture.nativeElement.textContent).toBe('BbCc');
      menuItemsContainer.move(menuItemsContainer.get(0)!, 1); // [ Cc, Bb, NULL]
      expect(fixture.nativeElement.textContent).toBe('CcBb');
    });
  });

  describe('Property bindings', () => {
    it('should throw on bindings to unknown properties', () => {
      TestBed.configureTestingModule({declarations: [MyComp]});
      const template = '<div unknown="{{ctxProp}}"></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});

      const spy = spyOn(console, 'error');
      const fixture = TestBed.createComponent(MyComp);
      fixture.detectChanges();
      expect(spy.calls.mostRecent().args[0]).toMatch(
        /Can't bind to 'unknown' since it isn't a known property of 'div'./,
      );
    });

    it('should throw on bindings to unknown properties', () => {
      TestBed.configureTestingModule({imports: [CommonModule], declarations: [MyComp]});
      const template = '<div *ngFor="let item in ctxArrProp">{{item}}</div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const spy = spyOn(console, 'error');
      const fixture = TestBed.createComponent(MyComp);
      fixture.detectChanges();
      expect(spy.calls.mostRecent().args[0]).toMatch(
        /Can't bind to 'ngForIn' since it isn't a known property of 'div'./,
      );
    });

    it('should not throw for property binding to a non-existing property when there is a matching directive property', () => {
      TestBed.configureTestingModule({declarations: [MyComp, MyDir]});
      const template = '<div my-dir [elprop]="ctxProp"></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      expect(() => TestBed.createComponent(MyComp)).not.toThrow();
    });

    it('should not be created when there is a directive with the same property', () => {
      TestBed.configureTestingModule({declarations: [MyComp, DirectiveWithTitle]});
      const template = '<span [title]="ctxProp"></span>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxProp = 'TITLE';
      fixture.detectChanges();

      const el = fixture.nativeElement.querySelector('span');
      expect(el.title).toBeFalsy();
    });

    it('should work when a directive uses hostProperty to update the DOM element', () => {
      TestBed.configureTestingModule({declarations: [MyComp, DirectiveWithTitleAndHostProperty]});
      const template = '<span [title]="ctxProp"></span>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxProp = 'TITLE';
      fixture.detectChanges();

      const el = fixture.nativeElement.querySelector('span');
      expect(el.title).toEqual('TITLE');
    });
  });

  describe('logging property updates', () => {
    it('should reflect property values as attributes', () => {
      TestBed.configureTestingModule({declarations: [MyComp, MyDir]});
      TestBed.overrideComponent(MyComp, {set: {template: `<div my-dir [elprop]="ctxProp"></div>`}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxProp = 'hello';
      fixture.detectChanges();

      const html = fixture.nativeElement.innerHTML;
      expect(html).toContain('ng-reflect-dir-prop="hello"');
    });

    it('should reflect property values on unbound inputs', () => {
      TestBed.configureTestingModule({declarations: [MyComp, MyDir]});
      TestBed.overrideComponent(MyComp, {
        set: {template: `<div my-dir elprop="hello" title="Reflect test"></div>`},
      });
      const fixture = TestBed.createComponent(MyComp);
      fixture.detectChanges();

      const html = fixture.nativeElement.innerHTML;
      expect(html).toContain('ng-reflect-dir-prop="hello"');
      expect(html).not.toContain('ng-reflect-title');
    });

    it(`should work with prop names containing '$'`, () => {
      TestBed.configureTestingModule({declarations: [ParentCmp, SomeCmpWithInput]});
      const fixture = TestBed.createComponent(ParentCmp);
      fixture.detectChanges();

      const html = fixture.nativeElement.innerHTML;
      expect(html).toContain('ng-reflect-test_="hello"');
    });

    it('should reflect property values on template comments', () => {
      const fixture = TestBed.configureTestingModule({declarations: [MyComp]})
        .overrideComponent(MyComp, {
          set: {template: `<ng-template [ngIf]="ctxBoolProp"></ng-template>`},
        })
        .createComponent(MyComp);

      fixture.componentInstance.ctxBoolProp = true;
      fixture.detectChanges();

      const html = fixture.nativeElement.innerHTML;
      expect(html).toContain('"ng-reflect-ng-if": "true"');
    });

    it('should reflect property values on ng-containers', () => {
      const fixture = TestBed.configureTestingModule({declarations: [MyComp]})
        .overrideComponent(MyComp, {
          set: {template: `<ng-container *ngIf="ctxBoolProp">content</ng-container>`},
        })
        .createComponent(MyComp);

      fixture.componentInstance.ctxBoolProp = true;
      fixture.detectChanges();

      const html = fixture.nativeElement.innerHTML;
      expect(html).toContain('"ng-reflect-ng-if": "true"');
    });

    it('should reflect property values of multiple directive bound to the same input name', () => {
      TestBed.configureTestingModule({declarations: [MyComp, MyDir, MyDir2]});
      TestBed.overrideComponent(MyComp, {
        set: {template: `<div my-dir my-dir2 [elprop]="ctxProp"></div>`},
      });
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxProp = 'hello';
      fixture.detectChanges();

      const html = fixture.nativeElement.innerHTML;
      expect(html).toContain('ng-reflect-dir-prop="hello"');
      expect(html).toContain('ng-reflect-dir-prop2="hello"');
    });

    it('should indicate when toString() throws', () => {
      TestBed.configureTestingModule({declarations: [MyComp, MyDir]});
      const template = '<div my-dir [elprop]="toStringThrow"></div>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.detectChanges();
      expect(fixture.nativeElement.innerHTML).toContain('[ERROR]');
    });

    it('should not reflect undefined values', () => {
      TestBed.configureTestingModule({declarations: [MyComp, MyDir, MyDir2]});
      TestBed.overrideComponent(MyComp, {set: {template: `<div my-dir [elprop]="ctxProp"></div>`}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxProp = 'hello';
      fixture.detectChanges();

      expect(fixture.nativeElement.innerHTML).toContain('ng-reflect-dir-prop="hello"');

      fixture.componentInstance.ctxProp = undefined!;
      fixture.detectChanges();

      expect(fixture.nativeElement.innerHTML).not.toContain('ng-reflect-');
    });

    it('should not reflect null values', () => {
      TestBed.configureTestingModule({declarations: [MyComp, MyDir, MyDir2]});
      TestBed.overrideComponent(MyComp, {set: {template: `<div my-dir [elprop]="ctxProp"></div>`}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxProp = 'hello';
      fixture.detectChanges();

      expect(fixture.nativeElement.innerHTML).toContain('ng-reflect-dir-prop="hello"');

      fixture.componentInstance.ctxProp = null!;
      fixture.detectChanges();

      expect(fixture.nativeElement.innerHTML).not.toContain('ng-reflect-');
    });

    it('should reflect empty strings', () => {
      TestBed.configureTestingModule({declarations: [MyComp, MyDir, MyDir2]});
      TestBed.overrideComponent(MyComp, {set: {template: `<div my-dir [elprop]="ctxProp"></div>`}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.componentInstance.ctxProp = '';
      fixture.detectChanges();

      expect(fixture.nativeElement.innerHTML).toContain('ng-reflect-dir-prop=""');
    });

    it('should not reflect in comment nodes when the value changes to undefined', () => {
      const fixture = TestBed.configureTestingModule({declarations: [MyComp]})
        .overrideComponent(MyComp, {
          set: {template: `<ng-template [ngIf]="ctxBoolProp"></ng-template>`},
        })
        .createComponent(MyComp);

      fixture.componentInstance.ctxBoolProp = true;
      fixture.detectChanges();

      let html = fixture.nativeElement.innerHTML;
      expect(html).toContain('bindings={');
      expect(html).toContain('"ng-reflect-ng-if": "true"');

      fixture.componentInstance.ctxBoolProp = undefined!;
      fixture.detectChanges();

      html = fixture.nativeElement.innerHTML;
      expect(html).toContain('bindings={');
      expect(html).not.toContain('ng-reflect');
    });

    it('should reflect in comment nodes when the value changes to null', () => {
      const fixture = TestBed.configureTestingModule({declarations: [MyComp]})
        .overrideComponent(MyComp, {
          set: {template: `<ng-template [ngIf]="ctxBoolProp"></ng-template>`},
        })
        .createComponent(MyComp);

      fixture.componentInstance.ctxBoolProp = true;
      fixture.detectChanges();

      let html = fixture.nativeElement.innerHTML;
      expect(html).toContain('bindings={');
      expect(html).toContain('"ng-reflect-ng-if": "true"');

      fixture.componentInstance.ctxBoolProp = null!;
      fixture.detectChanges();

      html = fixture.nativeElement.innerHTML;
      expect(html).toContain('bindings={');
      expect(html).toContain('"ng-reflect-ng-if": null');
    });
  });

  describe('property decorators', () => {
    it('should support property decorators', () => {
      TestBed.configureTestingModule({
        declarations: [MyComp, DirectiveWithPropDecorators],
        schemas: [NO_ERRORS_SCHEMA],
      });
      const template = '<with-prop-decorators elProp="aaa"></with-prop-decorators>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.detectChanges();
      const dir = fixture.debugElement.children[0].injector.get(DirectiveWithPropDecorators);
      expect(dir.dirProp).toEqual('aaa');
    });

    it('should support host binding decorators', () => {
      TestBed.configureTestingModule({
        declarations: [MyComp, DirectiveWithPropDecorators],
        schemas: [NO_ERRORS_SCHEMA],
      });
      const template = '<with-prop-decorators></with-prop-decorators>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.detectChanges();
      const dir = fixture.debugElement.children[0].injector.get(DirectiveWithPropDecorators);
      dir.myAttr = 'aaa';

      fixture.detectChanges();
      expect(fixture.debugElement.children[0].nativeElement.outerHTML).toContain('my-attr="aaa"');
    });

    if (getDOM().supportsDOMEvents) {
      it('should support event decorators', fakeAsync(() => {
        TestBed.configureTestingModule({
          declarations: [MyComp, DirectiveWithPropDecorators],
          schemas: [NO_ERRORS_SCHEMA],
        });
        const template = `<with-prop-decorators (elEvent)="ctxProp='called'">`;
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        tick();

        const emitter = fixture.debugElement.children[0].injector.get(DirectiveWithPropDecorators);
        emitter.fireEvent('fired !');

        tick();

        expect(fixture.componentInstance.ctxProp).toEqual('called');
      }));

      it('should support host listener decorators', () => {
        TestBed.configureTestingModule({
          declarations: [MyComp, DirectiveWithPropDecorators],
          schemas: [NO_ERRORS_SCHEMA],
        });
        const template = '<with-prop-decorators></with-prop-decorators>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        fixture.detectChanges();
        const dir = fixture.debugElement.children[0].injector.get(DirectiveWithPropDecorators);
        const native = fixture.debugElement.children[0].nativeElement;
        getDOM().dispatchEvent(native, createMouseEvent('click'));

        expect(dir.target).toBe(native);
      });
    }

    it('should support defining views in the component decorator', () => {
      TestBed.configureTestingModule({
        declarations: [MyComp, ComponentWithTemplate],
        imports: [CommonModule],
        schemas: [NO_ERRORS_SCHEMA],
      });
      const template = '<component-with-template></component-with-template>';
      TestBed.overrideComponent(MyComp, {set: {template}});
      const fixture = TestBed.createComponent(MyComp);

      fixture.detectChanges();
      const native = fixture.debugElement.children[0].nativeElement;
      expect(native).toHaveText('No View Decorator: 123');
    });
  });

  describe('whitespaces in templates', () => {
    it('should not remove whitespaces by default', waitForAsync(() => {
      @Component({
        selector: 'comp',
        template: '<span>foo</span>  <span>bar</span>',
      })
      class MyCmp {}

      const f = TestBed.configureTestingModule({declarations: [MyCmp]}).createComponent(MyCmp);
      f.detectChanges();

      expect(f.nativeElement.childNodes.length).toBe(2);
    }));

    it('should not remove whitespaces when explicitly requested not to do so', waitForAsync(() => {
      @Component({
        selector: 'comp',
        template: '<span>foo</span>  <span>bar</span>',
        preserveWhitespaces: true,
      })
      class MyCmp {}

      const f = TestBed.configureTestingModule({declarations: [MyCmp]}).createComponent(MyCmp);
      f.detectChanges();

      expect(f.nativeElement.childNodes.length).toBe(3);
    }));

    it('should remove whitespaces when explicitly requested to do so', waitForAsync(() => {
      @Component({
        selector: 'comp',
        template: '<span>foo</span>  <span>bar</span>',
        preserveWhitespaces: false,
      })
      class MyCmp {}

      const f = TestBed.configureTestingModule({declarations: [MyCmp]}).createComponent(MyCmp);
      f.detectChanges();

      expect(f.nativeElement.childNodes.length).toBe(2);
    }));
  });

  describe('orphan components', () => {
    it('should display correct error message for orphan component if forbidOrphanRendering option is set', () => {
      @Component({template: '...'})
      class MainComp {}
      ɵsetClassDebugInfo(MainComp, {
        className: 'MainComp',
        filePath: 'test.ts',
        lineNumber: 11,
        forbidOrphanRendering: true,
      });

      TestBed.configureTestingModule({declarations: [MainComp]});
      expect(() => TestBed.createComponent(MainComp)).toThrowError(
        /^NG01001: Orphan component found\! Trying to render the component MainComp \(at test\.ts:11\) without first loading the NgModule that declares it/,
      );
    });

    it('should not throw error for orphan component if forbidOrphanRendering option is not set', () => {
      @Component({template: '...'})
      class MainComp {}
      ɵsetClassDebugInfo(MainComp, {
        className: 'MainComp',
        filePath: 'test.ts',
        lineNumber: 11,
      });

      TestBed.configureTestingModule({declarations: [MainComp]});
      expect(() => TestBed.createComponent(MainComp)).not.toThrow();
    });
  });

  if (getDOM().supportsDOMEvents) {
    describe('svg', () => {
      it('should support svg elements', () => {
        TestBed.configureTestingModule({declarations: [MyComp]});
        const template = '<svg><use xlink:href="Port" /></svg>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        const el = fixture.nativeElement;
        const svg = el.childNodes[0];
        const use = svg.childNodes[0];
        expect(svg.namespaceURI).toEqual('http://www.w3.org/2000/svg');
        expect(use.namespaceURI).toEqual('http://www.w3.org/2000/svg');

        const firstAttribute = use.attributes[0];
        expect(firstAttribute.name).toEqual('xlink:href');
        expect(firstAttribute.namespaceURI).toEqual('http://www.w3.org/1999/xlink');
      });

      it('should support foreignObjects with document fragments', () => {
        TestBed.configureTestingModule({declarations: [MyComp]});
        const template =
          '<svg><foreignObject><xhtml:div><p>Test</p></xhtml:div></foreignObject></svg>';
        TestBed.overrideComponent(MyComp, {set: {template}});
        const fixture = TestBed.createComponent(MyComp);

        const el = fixture.nativeElement;
        const svg = el.childNodes[0];
        const foreignObject = svg.childNodes[0];
        const p = foreignObject.childNodes[0];
        expect(svg.namespaceURI).toEqual('http://www.w3.org/2000/svg');
        expect(foreignObject.namespaceURI).toEqual('http://www.w3.org/2000/svg');
        expect(p.namespaceURI).toEqual('http://www.w3.org/1999/xhtml');
      });
    });

    describe('attributes', () => {
      it('should support attributes with namespace', () => {
        TestBed.configureTestingModule({declarations: [MyComp, SomeCmp]});
        const template = '<svg:use xlink:href="#id" />';
        TestBed.overrideComponent(SomeCmp, {set: {template}});
        const fixture = TestBed.createComponent(SomeCmp);

        const useEl = fixture.nativeElement.firstChild;
        expect(useEl.getAttributeNS('http://www.w3.org/1999/xlink', 'href')).toEqual('#id');
      });

      it('should support binding to attributes with namespace', () => {
        TestBed.configureTestingModule({declarations: [MyComp, SomeCmp]});
        const template = '<svg:use [attr.xlink:href]="value" />';
        TestBed.overrideComponent(SomeCmp, {set: {template}});
        const fixture = TestBed.createComponent(SomeCmp);

        const cmp = fixture.componentInstance;
        const useEl = fixture.nativeElement.firstChild;

        cmp.value = '#id';
        fixture.detectChanges();

        expect(useEl.getAttributeNS('http://www.w3.org/1999/xlink', 'href')).toEqual('#id');

        cmp.value = null;
        fixture.detectChanges();

        expect(useEl.hasAttributeNS('http://www.w3.org/1999/xlink', 'href')).toEqual(false);
      });
    });
  }
});

@Component({selector: 'cmp-with-default-interpolation', template: `{{text}}`})
class ComponentWithDefaultInterpolation {
  text = 'Default Interpolation';
}

@Component({
  selector: 'cmp-with-custom-interpolation-a',
  template: `<div>{%text%}</div>`,
  interpolation: ['{%', '%}'],
})
class ComponentWithCustomInterpolationA {
  text = 'Custom Interpolation A';
}

@Component({
  selector: 'cmp-with-custom-interpolation-b',
  template: `<div>{**text%}</div> (<cmp-with-default-interpolation></cmp-with-default-interpolation>)`,
  interpolation: ['{**', '%}'],
})
class ComponentWithCustomInterpolationB {
  text = 'Custom Interpolation B';
}

@Injectable()
class MyService {
  greeting: string;
  constructor() {
    this.greeting = 'hello';
  }
}

@Component({selector: 'simple-imp-cmp', template: ''})
class SimpleImperativeViewComponent {
  done: any;

  constructor(self: ElementRef) {
    const hostElement = self.nativeElement;
    hostElement.appendChild(el('hello imp view'));
  }
}

@Directive({selector: 'dynamic-vp'})
class DynamicViewport {
  private injector: Injector;
  constructor(private vc: ViewContainerRef) {
    const myService = new MyService();
    myService.greeting = 'dynamic greet';

    this.injector = Injector.create({
      providers: [{provide: MyService, useValue: myService}],
      parent: vc.injector,
    });
  }

  create(): ComponentRef<ChildCompUsingService> {
    return this.vc.createComponent(ChildCompUsingService, {
      index: this.vc.length,
      injector: this.injector,
    });
  }

  insert(viewRef: ViewRef, index?: number): ViewRef {
    return this.vc.insert(viewRef, index);
  }

  move(viewRef: ViewRef, currentIndex: number): ViewRef {
    return this.vc.move(viewRef, currentIndex);
  }
}

@Directive({selector: '[my-dir]', inputs: ['dirProp: elprop'], exportAs: 'mydir'})
class MyDir {
  dirProp: string;
  constructor() {
    this.dirProp = '';
  }
}

@Directive({selector: '[my-dir2]', inputs: ['dirProp2: elprop'], exportAs: 'mydir2'})
class MyDir2 {
  dirProp2: string;
  constructor() {
    this.dirProp2 = '';
  }
}

@Directive({selector: '[title]', inputs: ['title']})
class DirectiveWithTitle {
  title: string | undefined;
}

@Directive({selector: '[title]', inputs: ['title'], host: {'[title]': 'title'}})
class DirectiveWithTitleAndHostProperty {
  title: string | undefined;
}

@Component({selector: 'event-cmp', template: '<div (click)="noop()"></div>'})
class EventCmp {
  noop() {}
}

@Component({
  selector: 'push-cmp',
  inputs: ['prop'],
  host: {'(click)': 'true'},
  changeDetection: ChangeDetectionStrategy.OnPush,
  template:
    '{{field}}<div (click)="noop()"></div><div *ngIf="true" (click)="noop()"></div><event-cmp></event-cmp>',
})
class PushCmp {
  numberOfChecks: number;
  prop: any;

  constructor() {
    this.numberOfChecks = 0;
  }

  noop() {}

  get field() {
    this.numberOfChecks++;
    return 'fixed';
  }
}

@Component({
  selector: 'push-cmp-with-ref',
  inputs: ['prop'],
  changeDetection: ChangeDetectionStrategy.OnPush,
  template: '{{field}}',
})
class PushCmpWithRef {
  numberOfChecks: number;
  ref: ChangeDetectorRef;
  prop: any;

  constructor(ref: ChangeDetectorRef) {
    this.numberOfChecks = 0;
    this.ref = ref;
  }

  get field() {
    this.numberOfChecks++;
    return 'fixed';
  }

  propagate() {
    this.ref.markForCheck();
  }
}

@Component({
  selector: 'push-cmp-with-host-event',
  host: {'(click)': 'ctxCallback($event)'},
  changeDetection: ChangeDetectionStrategy.OnPush,
  template: '',
})
class PushCmpWithHostEvent {
  ctxCallback: Function = (_: any) => {};
}

@Component({
  selector: 'push-cmp-with-async',
  changeDetection: ChangeDetectionStrategy.OnPush,
  template: '{{field | async}}',
})
class PushCmpWithAsyncPipe {
  numberOfChecks: number = 0;
  resolve!: (result: any) => void;
  promise: Promise<any>;

  constructor() {
    this.promise = new Promise((resolve) => {
      this.resolve = resolve;
    });
  }

  get field() {
    this.numberOfChecks++;
    return this.promise;
  }
}

@Component({selector: 'my-comp', template: ''})
class MyComp {
  ctxProp: string;
  ctxNumProp: number;
  ctxBoolProp: boolean;
  ctxArrProp: number[];
  toStringThrow = {
    toString: function () {
      throw 'boom';
    },
  };

  constructor() {
    this.ctxProp = 'initial value';
    this.ctxNumProp = 0;
    this.ctxBoolProp = false;
    this.ctxArrProp = [0, 1, 2];
  }

  throwError() {
    throw 'boom';
  }
}

@Component({
  selector: 'child-cmp',
  inputs: ['dirProp'],
  viewProviders: [MyService],
  template: '{{ctxProp}}',
})
class ChildComp {
  ctxProp: string;
  dirProp: string | null;
  constructor(service: MyService) {
    this.ctxProp = service.greeting;
    this.dirProp = null;
  }
}

@Component({selector: 'child-cmp-no-template', template: ''})
class ChildCompNoTemplate {
  ctxProp: string = 'hello';
}

@Component({selector: 'child-cmp-svc', template: '{{ctxProp}}'})
class ChildCompUsingService {
  ctxProp: string;
  constructor(service: MyService) {
    this.ctxProp = service.greeting;
  }
}

@Directive({selector: 'some-directive'})
class SomeDirective {}

class SomeDirectiveMissingAnnotation {}

@Component({
  selector: 'cmp-with-host',
  template: '<p>Component with an injected host</p>',
})
class CompWithHost {
  myHost: SomeDirective;
  constructor(@Host() someComp: SomeDirective) {
    this.myHost = someComp;
  }
}

@Component({selector: '[child-cmp2]', viewProviders: [MyService]})
class ChildComp2 {
  ctxProp: string;
  dirProp: string | null;
  constructor(service: MyService) {
    this.ctxProp = service.greeting;
    this.dirProp = null;
  }
}

class SomeViewportContext {
  constructor(public someTmpl: string) {}
}

@Directive({selector: '[some-viewport]'})
class SomeViewport {
  constructor(
    public container: ViewContainerRef,
    templateRef: TemplateRef<SomeViewportContext>,
  ) {
    container.createEmbeddedView(templateRef, new SomeViewportContext('hello'));
    container.createEmbeddedView(templateRef, new SomeViewportContext('again'));
  }
}

@Directive({selector: '[pollutedContext]'})
class PollutedContext {
  constructor(
    private tplRef: TemplateRef<any>,
    private vcRef: ViewContainerRef,
  ) {
    const evRef = this.vcRef.createEmbeddedView(this.tplRef);
    evRef.context.bar = 'baz';
  }
}

@Directive({selector: '[noContext]'})
class NoContext {
  constructor(
    private tplRef: TemplateRef<any>,
    private vcRef: ViewContainerRef,
  ) {
    this.vcRef.createEmbeddedView(this.tplRef);
  }
}

@Pipe({name: 'double'})
class DoublePipe implements PipeTransform, OnDestroy {
  ngOnDestroy() {}
  transform(value: any) {
    return `${value}${value}`;
  }
}

@Directive({selector: '[emitter]', outputs: ['event']})
class DirectiveEmittingEvent {
  msg: string;
  event: EventEmitter<any>;

  constructor() {
    this.msg = '';
    this.event = new EventEmitter();
  }

  fireEvent(msg: string) {
    this.event.emit(msg);
  }
}

@Directive({selector: '[update-host-attributes]', host: {'role': 'button'}})
class DirectiveUpdatingHostAttributes {}

@Directive({selector: '[update-host-properties]', host: {'[id]': 'id'}})
class DirectiveUpdatingHostProperties {
  id: string;

  constructor() {
    this.id = 'one';
  }
}

@Directive({selector: '[listener]', host: {'(event)': 'onEvent($event)'}})
class DirectiveListeningEvent {
  msg: string;

  constructor() {
    this.msg = '';
  }

  onEvent(msg: string) {
    this.msg = msg;
  }
}

@Directive({
  selector: '[listener]',
  host: {
    '(domEvent)': 'onEvent($event.type)',
    '(window:domEvent)': 'onWindowEvent($event.type)',
    '(document:domEvent)': 'onDocumentEvent($event.type)',
    '(body:domEvent)': 'onBodyEvent($event.type)',
  },
})
class DirectiveListeningDomEvent {
  eventTypes: string[] = [];
  onEvent(eventType: string) {
    this.eventTypes.push(eventType);
  }
  onWindowEvent(eventType: string) {
    this.eventTypes.push('window_' + eventType);
  }
  onDocumentEvent(eventType: string) {
    this.eventTypes.push('document_' + eventType);
  }
  onBodyEvent(eventType: string) {
    this.eventTypes.push('body_' + eventType);
  }
}

let globalCounter = 0;
@Directive({selector: '[listenerother]', host: {'(window:domEvent)': 'onEvent($event.type)'}})
class DirectiveListeningDomEventOther {
  eventType: string;
  constructor() {
    this.eventType = '';
  }
  onEvent(eventType: string) {
    globalCounter++;
    this.eventType = 'other_' + eventType;
  }
}

@Directive({selector: '[listenerprevent]', host: {'(click)': 'onEvent($event)'}})
class DirectiveListeningDomEventPrevent {
  onEvent(event: any) {
    return false;
  }
}

@Directive({selector: '[listenernoprevent]', host: {'(click)': 'onEvent($event)'}})
class DirectiveListeningDomEventNoPrevent {
  onEvent(event: any) {
    return true;
  }
}

@Directive({selector: '[id]', inputs: ['id']})
class IdDir {
  id: string | undefined;
}

@Directive({selector: '[customEvent]'})
class EventDir {
  @Output() customEvent = new EventEmitter();
  doSomething() {}
}

@Directive({selector: '[static]'})
class NeedsAttribute {
  typeAttribute: string;
  staticAttribute: string;
  fooAttribute: string;
  constructor(
    @Attribute('type') typeAttribute: string,
    @Attribute('static') staticAttribute: string,
    @Attribute('foo') fooAttribute: string,
  ) {
    this.typeAttribute = typeAttribute;
    this.staticAttribute = staticAttribute;
    this.fooAttribute = fooAttribute;
  }
}

@Injectable()
class PublicApi {}

@Directive({
  selector: '[public-api]',
  providers: [{provide: PublicApi, useExisting: PrivateImpl, deps: []}],
})
class PrivateImpl extends PublicApi {}

@Directive({selector: '[needs-public-api]'})
class NeedsPublicApi {
  constructor(@Host() api: PublicApi) {
    expect(api instanceof PrivateImpl).toBe(true);
  }
}

class ToolbarContext {
  constructor(public toolbarProp: string) {}
}

@Directive({selector: '[toolbarpart]'})
class ToolbarPart {
  templateRef: TemplateRef<ToolbarContext>;
  constructor(templateRef: TemplateRef<ToolbarContext>) {
    this.templateRef = templateRef;
  }
}

@Directive({selector: '[toolbarVc]', inputs: ['toolbarVc']})
class ToolbarViewContainer {
  constructor(public vc: ViewContainerRef) {}

  set toolbarVc(part: ToolbarPart) {
    this.vc.createEmbeddedView(part.templateRef, new ToolbarContext('From toolbar'), 0);
  }
}

@Component({
  selector: 'toolbar',
  template: 'TOOLBAR(<div *ngFor="let  part of query" [toolbarVc]="part"></div>)',
})
class ToolbarComponent {
  @ContentChildren(ToolbarPart) query!: QueryList<ToolbarPart>;
  ctxProp: string = 'hello world';

  constructor() {}
}

@Directive({selector: '[two-way]', inputs: ['control'], outputs: ['controlChange']})
class DirectiveWithTwoWayBinding {
  controlChange = new EventEmitter();
  control: any = null;

  triggerChange(value: any) {
    this.controlChange.emit(value);
  }
}

@Injectable()
class InjectableService {}

function createInjectableWithLogging(inj: Injector) {
  inj.get(ComponentProvidingLoggingInjectable).created = true;
  return new InjectableService();
}

@Component({
  selector: 'component-providing-logging-injectable',
  providers: [
    {provide: InjectableService, useFactory: createInjectableWithLogging, deps: [Injector]},
  ],
  template: '',
})
class ComponentProvidingLoggingInjectable {
  created: boolean = false;
}

@Directive({selector: 'directive-providing-injectable', providers: [[InjectableService]]})
class DirectiveProvidingInjectable {}

@Component({
  selector: 'directive-providing-injectable',
  viewProviders: [[InjectableService]],
  template: '',
})
class DirectiveProvidingInjectableInView {}

@Component({
  selector: 'directive-providing-injectable',
  providers: [{provide: InjectableService, useValue: 'host'}],
  viewProviders: [{provide: InjectableService, useValue: 'view'}],
  template: '',
})
class DirectiveProvidingInjectableInHostAndView {}

@Component({selector: 'directive-consuming-injectable', template: ''})
class DirectiveConsumingInjectable {
  injectable: any;

  constructor(@Host() @Inject(InjectableService) injectable: any) {
    this.injectable = injectable;
  }
}

@Component({selector: 'directive-containing-directive-consuming-an-injectable'})
class DirectiveContainingDirectiveConsumingAnInjectable {
  directive: any;
}

@Component({selector: 'directive-consuming-injectable-unbounded', template: ''})
class DirectiveConsumingInjectableUnbounded {
  injectable: any;

  constructor(
    injectable: InjectableService,
    @SkipSelf() parent: DirectiveContainingDirectiveConsumingAnInjectable,
  ) {
    this.injectable = injectable;
    parent.directive = this;
  }
}

class EventBus {
  parentEventBus: EventBus;
  name: string;

  constructor(parentEventBus: EventBus, name: string) {
    this.parentEventBus = parentEventBus;
    this.name = name;
  }
}

@Directive({
  selector: 'grand-parent-providing-event-bus',
  providers: [{provide: EventBus, useValue: new EventBus(null!, 'grandparent')}],
})
class GrandParentProvidingEventBus {
  bus: EventBus;

  constructor(bus: EventBus) {
    this.bus = bus;
  }
}

function createParentBus(peb: EventBus) {
  return new EventBus(peb, 'parent');
}

@Component({
  selector: 'parent-providing-event-bus',
  providers: [{provide: EventBus, useFactory: createParentBus, deps: [[EventBus, new SkipSelf()]]}],
  template: `<child-consuming-event-bus></child-consuming-event-bus>`,
})
class ParentProvidingEventBus {
  bus: EventBus;
  grandParentBus: EventBus;

  constructor(bus: EventBus, @SkipSelf() grandParentBus: EventBus) {
    this.bus = bus;
    this.grandParentBus = grandParentBus;
  }
}

@Directive({selector: 'child-consuming-event-bus'})
class ChildConsumingEventBus {
  bus: EventBus;

  constructor(@SkipSelf() bus: EventBus) {
    this.bus = bus;
  }
}

@Directive({selector: '[someImpvp]', inputs: ['someImpvp']})
class SomeImperativeViewport {
  view: EmbeddedViewRef<Object> | null;
  anchor: any;
  constructor(
    public vc: ViewContainerRef,
    public templateRef: TemplateRef<Object>,
    @Inject(ANCHOR_ELEMENT) anchor: any,
  ) {
    this.view = null;
    this.anchor = anchor;
  }

  set someImpvp(value: boolean) {
    if (this.view) {
      this.vc.clear();
      this.view = null;
    }

    if (value) {
      this.view = this.vc.createEmbeddedView(this.templateRef);
      const nodes = this.view.rootNodes;
      for (let i = 0; i < nodes.length; i++) {
        this.anchor.appendChild(nodes[i]);
      }
    }
  }
}

@Directive({selector: '[export-dir]', exportAs: 'dir'})
class ExportDir {}

@Directive({selector: '[multiple-export-as]', exportAs: 'dirX, dirY'})
export class DirectiveWithMultipleExportAsNames {}

@Component({selector: 'comp'})
class ComponentWithoutView {}

@Directive({selector: '[no-duplicate]'})
class DuplicateDir {
  constructor(elRef: ElementRef) {
    elRef.nativeElement.textContent += 'noduplicate';
  }
}

@Directive({selector: '[no-duplicate]'})
class OtherDuplicateDir {
  constructor(elRef: ElementRef) {
    elRef.nativeElement.textContent += 'othernoduplicate';
  }
}

@Directive({selector: 'directive-throwing-error'})
class DirectiveThrowingAnError {
  constructor() {
    throw new Error('BOOM');
  }
}

@Component({
  selector: 'component-with-template',
  template: `No View Decorator: <div *ngFor="let item of items">{{item}}</div>`,
})
class ComponentWithTemplate {
  items = [1, 2, 3];
}

@Directive({selector: 'with-prop-decorators'})
class DirectiveWithPropDecorators {
  target: any;

  @Input('elProp') dirProp: string | undefined;
  @Output('elEvent') event = new EventEmitter();

  @HostBinding('attr.my-attr') myAttr: string | undefined;
  @HostListener('click', ['$event.target'])
  onClick(target: any) {
    this.target = target;
  }

  fireEvent(msg: any) {
    this.event.emit(msg);
  }
}

@Component({selector: 'some-cmp'})
class SomeCmp {
  value: any;
}

@Component({
  selector: 'parent-cmp',
  template: `<cmp [test$]="name"></cmp>`,
})
export class ParentCmp {
  name: string = 'hello';
}

@Component({
  selector: 'cmp',
  template: '',
})
class SomeCmpWithInput {
  @Input() test$: any;
}

function isPrevented(evt: Event): boolean {
  return evt.defaultPrevented || (evt.returnValue != null && !evt.returnValue);
}
