How to use ngAfterViewChecked method in ng-mocks

Best JavaScript code snippet using ng-mocks

lifcycle-hooks.spec.ts

Source:lifcycle-hooks.spec.ts

1import { Component } from '@angular/core';2import { TestBed } from '@angular/core/testing';3import { Logger } from '../../../src/lifecycle/app/util/logger';4import { FlatComponent } from './components/flat.component';5import { FirstLevelComponent } from './components/first-level.component';6import { SecondLevelComponent } from './components/second-level.component';7import { ThirdLevelComponent } from './components/third-level.component';8describe('Lifecycle hooks - ', () => {9	class MockLogger {10		private cycles: Array<string> = [];11		log(text: string): void {12			this.cycles.push(text);13		}14		print(): Array<string> {15			return this.cycles;16		}17		clear(): void {18			this.cycles = [];19		}20	}21	let mockLogger = new MockLogger();22	describe('Flat, one level component', () => {23		beforeEach(() => {24			TestBed25				.configureTestingModule({26					imports: [],27					declarations: [28						FlatComponent29					],30					providers: [31						{32							provide: Logger, useValue: mockLogger33						}34					]35				});36		});37		it('should invoke lifecycle hooks - without OnChanges', () => {38			// given39			const expectedCycles = [40				'ngOnInit',41				'ngDoCheck',42				'ngAfterContentInit',43				'ngAfterContentChecked',44				'ngAfterViewInit',45				'ngAfterViewChecked',46				'ngOnDestroy'47			];48			TestBed.overrideTemplate(FlatComponent, `<p>Level one Component</p>`);49			const fixture = TestBed.createComponent(FlatComponent);50			// when51			fixture.detectChanges();52			fixture.destroy();53			// then54			expect(mockLogger.print()).toEqual(expectedCycles);55		});56	});57	/**58	 * OnChanges Lifecycle Hook is invoked only when component has "input" and that property has a value.59	 */60	describe('Component with input should invoke all lifecycle hooks -', () => {61		@Component({62			selector: 'test',63			template: `64				<ct-flat [input]="'value'"></ct-flat>`65		})66		class TestComponent {67		}68		beforeEach(() => {69			mockLogger.clear();70			TestBed71				.configureTestingModule({72					imports: [],73					declarations: [74						TestComponent,75						FlatComponent76					],77					providers: [{78						provide: Logger, useValue: mockLogger79					}]80				});81		});82		it('should fire OnChanges', () => {83			// given84			const expectedCycles = [85				'ngOnChanges',86				'ngOnInit',87				'ngDoCheck',88				'ngAfterContentInit',89				'ngAfterContentChecked',90				'ngAfterViewInit',91				'ngAfterViewChecked',92				'ngOnDestroy'93			];94			const fixture = TestBed.createComponent(TestComponent);95			// when96			fixture.detectChanges();97			fixture.destroy();98			// then99			expect(mockLogger.print()).toEqual(expectedCycles);100		})101	});102	describe('Simple Two level components tree -', () => {103		beforeEach(() => {104			mockLogger.clear();105			TestBed106				.configureTestingModule({107					imports: [],108					declarations: [109						FirstLevelComponent,110						SecondLevelComponent111					],112					providers: [{113						provide: Logger, useValue: mockLogger114					}]115				});116		});117		/**118		 *119		 * <ct-first-level>120		 *     <ct-second-level></ct-second-level>121		 * </ct-first-level>122		 *123		 */124		it('components does not have content', () => {125			// given126			const expectedCycles = [127				'First level - ngOnInit',128				'First level - ngDoCheck',129				'First level - ngAfterContentInit',130				'First level - ngAfterContentChecked',131				'Second level - ngOnInit',132				'Second level - ngDoCheck',133				'Second level - ngAfterContentInit',134				'Second level - ngAfterContentChecked',135				'Second level - ngAfterViewInit',136				'Second level - ngAfterViewChecked',137				'First level - ngAfterViewInit',138				'First level - ngAfterViewChecked',139				'Second level - ngOnDestroy',140				'First level - ngOnDestroy'141			];142			const fixture = TestBed.createComponent(FirstLevelComponent);143			// when144			fixture.detectChanges();145			fixture.destroy();146			// then147			expect(mockLogger.print()).toEqual(expectedCycles);148		});149		it('Second level component has input', () => {150			// given151			const expectedCycles = [152				'First level - ngOnInit',153				'First level - ngDoCheck',154				'First level - ngAfterContentInit',155				'First level - ngAfterContentChecked',156				'Second level - ngOnChanges',157				'Second level - ngOnInit',158				'Second level - ngDoCheck',159				'Second level - ngAfterContentInit',160				'Second level - ngAfterContentChecked',161				'Second level - ngAfterViewInit',162				'Second level - ngAfterViewChecked',163				'First level - ngAfterViewInit',164				'First level - ngAfterViewChecked',165				'Second level - ngOnDestroy',166				'First level - ngOnDestroy'167			];168			TestBed.overrideTemplate(FirstLevelComponent, `<ct-second-level [input]="'Text'" ></ct-second-level>`);169			const fixture = TestBed.createComponent(FirstLevelComponent);170			// when171			fixture.detectChanges();172			fixture.destroy();173			// then174			expect(mockLogger.print()).toEqual(expectedCycles);175		});176	});177	describe('Simple Three level components tree -', () => {178		beforeEach(() => {179			mockLogger.clear();180			TestBed181				.configureTestingModule({182					imports: [],183					declarations: [184						FirstLevelComponent,185						SecondLevelComponent,186						ThirdLevelComponent187					],188					providers: [{189						provide: Logger, useValue: mockLogger190					}]191				});192		});193		/**194		 *195		 * <ct-first-level>196		 *     <ct-second-level>197		 *         <ct-third-level></ct-third-level>198		 *     </ct-second-level>199		 * </ct-first-level>200		 *201		 */202		it('components does not have content', () => {203			// given204			const expectedCycles = [205				'First level - ngOnInit',206				'First level - ngDoCheck',207				'First level - ngAfterContentInit',208				'First level - ngAfterContentChecked',209				'Second level - ngOnInit',210				'Second level - ngDoCheck',211				'Second level - ngAfterContentInit',212				'Second level - ngAfterContentChecked',213				'Third level - ngOnInit',214				'Third level - ngDoCheck',215				'Third level - ngAfterContentInit',216				'Third level - ngAfterContentChecked',217				'Third level - ngAfterViewInit',218				'Third level - ngAfterViewChecked',219				'Second level - ngAfterViewInit',220				'Second level - ngAfterViewChecked',221				'First level - ngAfterViewInit',222				'First level - ngAfterViewChecked',223				'Third level - ngOnDestroy',224				'Second level - ngOnDestroy',225				'First level - ngOnDestroy'226			];227			TestBed.overrideTemplate(SecondLevelComponent, `<ct-third-level ></ct-third-level>`);228			const fixture = TestBed.createComponent(FirstLevelComponent);229			// when230			fixture.detectChanges();231			fixture.destroy();232			// then233			expect(mockLogger.print()).toEqual(expectedCycles);234		});235	});236	describe('input modifications', () => {237		@Component({238			selector: 'test',239			template: `<ct-first-level [input]="val" ></ct-first-level>`240		})241		class InputTestComponent {242			val = 8;243			changeVal() {244				this.val = 10;245			}246		}247		beforeEach(() => {248			TestBed249				.configureTestingModule({250					imports: [],251					declarations: [252						InputTestComponent,253						FirstLevelComponent254					],255					providers: [{256						provide: Logger, useValue: mockLogger257					}]258				});259		});260		it('Change input value of a component', () => {261			// given262			const expectedCycles = [263				'First level - ngOnChanges',264				'First level - ngDoCheck',265				'First level - ngAfterContentChecked',266				'First level - ngAfterViewChecked'267			];268			TestBed.overrideTemplate(FirstLevelComponent, `no content`);269			const fixture = TestBed.createComponent(InputTestComponent);270			// when271			fixture.detectChanges();272			mockLogger.clear();273			fixture.componentInstance.changeVal();274			fixture.detectChanges();275			// then276			expect(mockLogger.print()).toEqual(expectedCycles);277		});278	});...

on-after-view-checked.ts

Source:on-after-view-checked.ts

...16  // changeDetection: ChangeDetectionStrategy.OnPush17})18class GrandChildComponent implements AfterViewChecked {19  @Input() grandChildReceived: string;20  ngAfterViewChecked(){21    console.log('GrandChild: in ngAfterViewChecked');22  }23}24@Component({25  selector: 'child',26  styles: ['.child{background:lightgreen}'],27  directives: [GrandChildComponent],28  template: `29     <div class="child">30      <h2>Child</h2>31      <div>Greeting: {{greeting}}</div>32      <div>Message: <input [(ngModel)]="message"></div>33      <grand-child [grandChildReceived]="message"></grand-child>34    </div>35  `,36  changeDetection: ChangeDetectionStrategy.OnPush37})38class ChildComponent implements AfterViewChecked {39  @Input() greeting: string;40  message: string = 'Initial message';41  ngAfterViewChecked() {42    console.log("Child: in ngAfterViewChecked");43  }44}45@Component({46  selector: 'app',47  directives: [ChildComponent],48  styles: ['.parent {background: lightblue}'],49  template: `50     <div class="parent">51       <h2>Parent</h2>52      <div>Greeting: <input type="text" [value]="greeting" (change)="greeting = $event.target.value"></div>53      <child [greeting]="greeting"></child>54    </div>55  `,56  // changeDetection: ChangeDetectionStrategy.OnPush57})58class AppComponent implements AfterViewChecked {59  greeting: string = 'Hello';60  ngAfterViewChecked() {61    console.log("Parent: in ngAfterViewChecked");62  }63}64enableProdMode();...

ng-after-view-checked.component.ts

Source:ng-after-view-checked.component.ts

...14  }15  ngAfterContentInit(){16    console.log("after content init");17  }18  ngAfterViewChecked(){19    console.log("after view checked")20  }21  clickMe(){22    console.log("link clicked")23  }24  //ngAfterViewChecked () ÄÆ°á»£c gá»i sau ngAfterContentInit25  // ngAfterViewChecked () ÄÆ°á»£c gá»i sau má»i ngAfterContentChecked tiáº¿p theo.26  // KÃch hoáº¡t hÃ m clickMe () sáº½ kÃch hoáº¡t ngAfterViewChecked ()27  // Khi nÃ o báº¡n nÃªn sá» dá»¥ng ngAfterViewChecked?28  // ngAfterViewChecked há»¯u Ãch khi báº¡n29  // muá»n gá»i má»t mÃ³c vÃ²ng Äá»i sau khi táº¥t cáº£ cÃ¡c thÃ nh pháº§n con ÄÃ£ ÄÆ°á»£c khá»i táº¡o vÃ  kiá»m tra....

Using AI Code Generation

1import { MockBuilder, MockRender, ngMocks } from 'ng-mocks';2import { TestComponent } from './test.component';3describe('TestComponent', () => {4  beforeEach(() => MockBuilder(TestComponent));5  it('should create', () => {6    const fixture = MockRender(TestComponent);7    const component = ngMocks.findInstance(TestComponent);8    spyOn(component, 'ngAfterViewChecked');9    fixture.detectChanges();10    expect(component.ngAfterViewChecked).toHaveBeenCalled();11  });12});13import { Component, OnInit } from '@angular/core';14@Component({15})16export class TestComponent implements OnInit {17  constructor() { }18  ngOnInit(): void {19  }20  ngAfterViewChecked(): void {21    console.log('ngAfterViewChecked');22  }23}24div {25  color: red;26}27    ✓ should create (26ms)

Using AI Code Generation

1import {Component, ViewChild} from '@angular/core';2import {TestBed} from '@angular/core/testing';3import {MockBuilder, MockRender, ngMocks} from 'ng-mocks';4@Component({5})6class TargetComponent {7  @ViewChild('myDiv') myDiv: any;8  ngAfterViewChecked(): void {9    console.log('ngAfterViewChecked');10  }11}12describe('ngAfterViewChecked', () => {13  beforeEach(() => MockBuilder(TargetComponent));14  it('should call ngAfterViewChecked', () => {15    const fixture = MockRender(TargetComponent);16    const component = ngMocks.findInstance(TargetComponent);17    spyOn(component, 'ngAfterViewChecked');18    fixture.detectChanges();19    expect(component.ngAfterViewChecked).toHaveBeenCalled();20  });21});

Using AI Code Generation

1import { Component, AfterViewChecked } from '@angular/core';2import { MockBuilder, MockRender } from 'ng-mocks';3import { AppModule } from './app.module';4@Component({5})6class AppComponent implements AfterViewChecked {7  public ngAfterViewChecked(): void {8    console.log('ngAfterViewChecked');9  }10}11describe('AppComponent', () => {12  beforeEach(() => MockBuilder(AppComponent, AppModule));13  it('renders the component', () => {14    const fixture = MockRender(AppComponent);15    expect(fixture.nativeElement).toBeDefined();16  });17});18import { NgModule } from '@angular/core';19import { BrowserModule } from '@angular/platform-browser';20import { AppComponent } from './app.component';21@NgModule({22  imports: [BrowserModule],23})24export class AppModule {}25import { Component } from '@angular/core';26@Component({27})28export class AppComponent {}29{30  "compilerOptions": {31  },32}33{34  "compilerOptions": {35    "importHelpers": true,

Using AI Code Generation

1import { Component, AfterViewChecked, ViewChild, ElementRef } from '@angular/core';2import { MockComponent } from 'ng-mocks';3import { ChildComponent } from './child.component';4@Component({5})6export class ParentComponent implements AfterViewChecked {7  @ViewChild('child', { static: true }) child: ChildComponent;8  ngAfterViewChecked() {9    console.log(this.child);10  }11}12describe('ParentComponent', () => {13  it('should create', () => {14    const fixture = MockRender(ParentComponent);15    expect(fixture.point.componentInstance).toBeDefined();16  });17});18import { Component } from '@angular/core';19@Component({20})21export class ChildComponent {22  constructor() {}23}24import { MockRender } from 'ng-mocks';25import { ChildComponent } from './child.component';26describe('ChildComponent', () => {27  it('should create', () => {28    const fixture = MockRender(ChildComponent);29    expect(fixture.point.componentInstance).toBeDefined();30  });31});32import { Component, AfterViewChecked, ViewChild, ElementRef } from '@angular/core';33import { MockComponent } from 'ng-mocks';34import { ChildComponent } from './child.component';35@Component({36})37export class ParentComponent implements AfterViewChecked {38  @ViewChild('child', { static: true }) child: ChildComponent;39  ngAfterViewChecked() {40    console.log(this.child);41  }42}43describe('ParentComponent', () => {44  it('should create', () => {45    const fixture = MockRender(ParentComponent);46    expect(fixture.point.componentInstance).toBeDefined();47  });48});

Using AI Code Generation

1import { Component, OnInit } from '@angular/core';2import { MockComponent } from 'ng-mocks';3@Component({4})5export class TestComponent implements OnInit {6  show: boolean = false;7  constructor() {}8  ngOnInit() {}9  ngAfterViewChecked() {10    this.show = true;11  }12}13import { Component, OnInit } from '@angular/core';14@Component({15})16export class MockComponent implements OnInit {17  constructor() {}18  ngOnInit() {}19}20import { async, ComponentFixture, TestBed } from '@angular/core/testing';21import { MockComponent } from 'ng-mocks';22import { TestComponent } from './test';23describe('MockComponent', () => {24  let component: TestComponent;25  let fixture: ComponentFixture<TestComponent>;26  beforeEach(async(() => {27    TestBed.configureTestingModule({28      declarations: [TestComponent, MockComponent(MockComponent)]29    }).compileComponents();30  }));31  beforeEach(() => {32    fixture = TestBed.createComponent(TestComponent);33    component = fixture.componentInstance;34    fixture.detectChanges();35  });36  it('should create', () => {37    expect(component).toBeTruthy();38  });39});

Using AI Code Generation

1import { Component } from '@angular/core';2import { MockComponent } from 'ng-mocks';3@Component({4})5export class TestComponent {6  data = 'test';7}8import { Component, Input, AfterViewChecked } from '@angular/core';9@Component({10    <div>{{ data }}</div>11})12export class ChildComponent implements AfterViewChecked {13  @Input() data: string;14  ngAfterViewChecked() {15    console.log('ngAfterViewChecked called');16  }17}18import { ComponentFixture, TestBed } from '@angular/core/testing';19import { MockComponent } from 'ng-mocks';20import { ChildComponent } from './child-component';21import { TestComponent } from './test';22describe('TestComponent', () => {23  let component: TestComponent;24  let fixture: ComponentFixture<TestComponent>;25  beforeEach(async () => {26    await TestBed.configureTestingModule({27      declarations: [TestComponent, MockComponent(ChildComponent)],28    }).compileComponents();29  });30  beforeEach(() => {31    fixture = TestBed.createComponent(TestComponent);32    component = fixture.componentInstance;33    fixture.detectChanges();34  });35  it('should create', () => {36    expect(component).toBeTruthy();37  });38});39import { ComponentFixture, TestBed } from '@angular/core/testing';40import { MockComponent } from 'ng-mocks';41import { ChildComponent } from './child-component';42import { TestComponent } from './test';43describe('TestComponent', () => {44  let component: TestComponent;45  let fixture: ComponentFixture<TestComponent>;46  beforeEach(async () => {47    await TestBed.configureTestingModule({48      declarations: [TestComponent, MockComponent(ChildComponent)],49    }).compileComponents();50  });51  beforeEach(() => {52    fixture = TestBed.createComponent(TestComponent);53    component = fixture.componentInstance;54    fixture.detectChanges();55  });56  it('should create', () => {57    expect(component).toBeTruthy();58  });59});60import { ComponentFixture, TestBed } from '@angular/core/testing';61import { MockComponent } from 'ng-mocks';62import { ChildComponent } from './child-component';63import { TestComponent } from './test';64describe('TestComponent', () =>

Using AI Code Generation

1import { Component, AfterViewChecked } from '@angular/core';2@Component({3})4export class AppComponent implements AfterViewChecked {5  show = false;6  ngAfterViewChecked() {7    this.show = true;8  }9}10import { MockBuilder, MockRender } from 'ng-mocks';11import { AppComponent } from './test';12describe('AppComponent', () => {13  beforeEach(() => MockBuilder(AppComponent));14  it('should create the app', () => {15    const fixture = MockRender(AppComponent);16    expect(fixture.nativeElement).toBeDefined();17  });18});

Using AI Code Generation

1import { Component, Input, ViewChild, ViewChildren, AfterViewChecked } from '@angular/core';2@Component({3})4export class MockingNgAfterViewCheckedComponent implements AfterViewChecked {5  public ngAfterViewChecked() {6    console.log('ngAfterViewChecked called');7  }8}9import { MockBuilder, MockRender, MockedComponentFixture } from 'ng-mocks';10import { MockingNgAfterViewCheckedComponent } from './test';11describe('MockingNgAfterViewCheckedComponent', () => {12  let component: MockingNgAfterViewCheckedComponent;13  let fixture: MockedComponentFixture<MockingNgAfterViewCheckedComponent>;14  beforeEach(() => MockBuilder(MockingNgAfterViewCheckedComponent));15  beforeEach(() => {16    fixture = MockRender(MockingNgAfterViewCheckedComponent);17    component = fixture.point.componentInstance;18  });19  it('should call ngAfterViewChecked', () => {20    spyOn(component, 'ngAfterViewChecked');21    fixture.detectChanges();22    expect(component.ngAfterViewChecked).toHaveBeenCalled();23  });24});

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