How to use ngAfterContentChecked method in ng-mocks

Best JavaScript code snippet using ng-mocks

lifcycle-hooks.spec.ts

Source:lifcycle-hooks.spec.ts Github

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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 });...

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sample1.component.ts

Source:sample1.component.ts Github

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...36 // Angularがコンポーネントのビューあるいはディレクティブが存在するビューに、外部コンテンツを投影した後に応答します。37 // 最初の ngDoCheck() の後に 1度 呼び出されます。38 console.log('3. ngAfterContentInit, ngDoCheckのあと一度だけ呼び出させる');39 }40 ngAfterContentChecked() {41 // NOTE42 // Angularがディレクティブ/コンポーネントに投影された外部コンテンツをチェックした後に応答します。43 console.log('4. ngAfterContentChecked, ngAfterContentInit() とその後全ての ngDoCheck() の後に呼び出されます。');44 }45 ngAfterViewInit() {46 // NOTE47 // Angularがコンポーネントのビューと子のビュー、あるいはディレクティブが存在するビューを初期化した後に応答します。48 // 最初の ngAfterContentChecked() の後に 1度 呼び出されます。49 console.log('5. ngAfterViewInit, 最初の ngAfterContentChecked() の後に 1度 呼び出されます。');50 }51 ngAfterViewChecked() {52 // NOTE53 // Angularがコンポーネントのビューと子のビュー、あるいはディレクティブが存在するビューをチェックした後に応答します。54 // ngAfterViewInit() とその後のすべての ngAfterContentChecked() の後に呼び出されます。55 console.log('6. ngAfterViewChecked, ngAfterViewInit() とその後のすべての ngAfterContentChecked() の後に呼び出されます。');56 }57 ngOnDestroy() {58 // NOTE59 // Angularがディレクティブ/コンポーネントを破棄する直前に、クリーンアップします。 メモリリークを回避するためにObservableの購読を解除し、イベントハンドラをデタッチしましょう。60 // Angularがディレクティブ/コンポーネントを破棄する 直前 に呼び出されます。61 console.log('-1. ngOnDestroy, Angularがディレクティブ/コンポーネントを破棄する 直前 に呼び出されます');62 }...

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example.component.ts

Source:example.component.ts Github

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...136 /**137 * @ngAfterContentChecked138 * 投影检测后调用, ngDoCheck ngAfterContentInit 触发139 */140 ngAfterContentChecked() {141 console.log('ngAfterContentChecked -');142 }143 /**144 * @ngAfterViewInit145 * 初始化完成视图时调用, ngAfterContentChecked 后触发, 只调用一次146 */147 ngAfterViewInit() {148 console.log('ngAfterViewInit -');149 }150 /**151 * @ngAfterViewChecked152 * 视图检测后调用, ngAfterContentChecked ngAfterViewInit 触发153 */154 ngAfterViewChecked() {...

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Using AI Code Generation

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1import { AfterContentChecked } from '@angular/core';2import { MockBuilder, MockRender } from 'ng-mocks';3import { AppComponent } from './app.component';4describe('AppComponent', () => {5 beforeEach(() => MockBuilder(AppComponent));6 it('should create the app', () => {7 const fixture = MockRender(AppComponent);8 const app = fixture.point.componentInstance;9 expect(app).toBeTruthy();10 });11 it('should call ngAfterContentChecked', () => {12 const fixture = MockRender(AppComponent);13 const app = fixture.point.componentInstance;14 const spy = spyOn(app, 'ngAfterContentChecked');15 app.ngAfterContentChecked();16 expect(spy).toHaveBeenCalled();17 });18});19import { AfterContentChecked, Component } from '@angular/core';20@Component({21})22export class AppComponent implements AfterContentChecked {23 title = 'ng-mocks';24 ngAfterContentChecked(): void {25 console.log('ngAfterContentChecked');26 }27}28 Welcome to {{ title }}!29h1 {30 color: #369;31 font-family: Arial, Helvetica, sans-serif;32 font-size: 250%;33}34import { MockBuilder, MockRender, ngMocks } from 'ng-mocks';35import { AppComponent } from './app.component';36describe('AppComponent', () => {37 beforeEach(() => MockBuilder(AppComponent));38 it('should create the app', () => {39 const fixture = MockRender(AppComponent);40 const app = fixture.point.componentInstance;41 expect(app).toBeTruthy();42 });43 it('should call ngAfterContentChecked', () => {44 const fixture = MockRender(AppComponent);45 const app = fixture.point.componentInstance;46 const spy = spyOn(app, 'ngAfterContentChecked');47 app.ngAfterContentChecked();48 expect(spy).toHaveBeenCalled();49 });50 it('should call ngAfterContentChecked using ngMocks', ()

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Using AI Code Generation

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1import { Component } from '@angular/core';2import { TestBed } from '@angular/core/testing';3import { MockBuilder, MockRender } from 'ng-mocks';4import { ChildComponent } from './child.component';5import { ParentComponent } from './parent.component';6@Component({7})8class AppComponent {}9describe('AppComponent', () => {10 beforeEach(() => MockBuilder(AppComponent, ParentComponent));11 it('should create the app', () => {12 const fixture = MockRender(AppComponent);13 const app = fixture.point.componentInstance;14 expect(app).toBeTruthy();15 });16 it('should call ngAfterContentChecked method of parent component', () => {17 const fixture = MockRender(AppComponent);18 const app = fixture.point.componentInstance;19 const parentComponent = fixture.debugElement.children[0].componentInstance;20 const spy = spyOn(parentComponent, 'ngAfterContentChecked');21 app.ngAfterContentChecked();22 expect(spy).toHaveBeenCalled();23 });24 it('should call ngAfterContentChecked method of child component', () => {25 const fixture = MockRender(AppComponent);26 const app = fixture.point.componentInstance;27 const childComponent = fixture.debugElement.children[0].children[0].componentInstance;28 const spy = spyOn(childComponent, 'ngAfterContentChecked');29 app.ngAfterContentChecked();30 expect(spy).toHaveBeenCalled();31 });32});33import { Component, Input, AfterContentChecked } from '@angular/core';34@Component({35 <p>{{childValue}}</p>36})37export class ChildComponent implements AfterContentChecked {38 @Input() childValue: string;39 ngAfterContentChecked() {40 console.log('child component ngAfterContentChecked method is called');41 }42}43import { Component, AfterContentChecked } from '@angular/core';44import { ChildComponent } from './child.component';45@Component({46})47export class ParentComponent implements AfterContentChecked {48 parentValue = 'Parent Value';49 ngAfterContentChecked() {50 console.log('parent component ngAfterContentChecked method is called');

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Using AI Code Generation

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1import { Component, OnInit, AfterContentChecked} from '@angular/core';2import { NgMocks } from 'ng-mocks';3@Component({4})5export class TestComponent implements OnInit, AfterContentChecked {6 constructor() { }7 ngOnInit() {8 }9 ngAfterContentChecked() {10 console.log('ngAfterContentChecked called');11 }12}13import { async, ComponentFixture, TestBed } from '@angular/core/testing';14import { TestComponent } from './test.component';15import { NgMocks } from 'ng-mocks';16describe('TestComponent', () => {17 let component: TestComponent;18 let fixture: ComponentFixture<TestComponent>;19 beforeEach(async(() => {20 TestBed.configureTestingModule({21 })22 .compileComponents();23 }));24 beforeEach(() => {25 fixture = TestBed.createComponent(TestComponent);26 component = fixture.componentInstance;27 fixture.detectChanges();28 });29 it('should create', () => {30 expect(component).toBeTruthy();31 });32 it('should call ngAfterContentChecked', () => {33 const spy = spyOn(component, 'ngAfterContentChecked');34 NgMocks.triggerLifecycle(fixture, 'ngAfterContentChecked');35 expect(spy).toHaveBeenCalled();36 });37});

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Using AI Code Generation

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1import { async, ComponentFixture, TestBed } from '@angular/core/testing';2import { By } from '@angular/platform-browser';3import { MockComponent, MockModule } from 'ng-mocks';4import { ChildComponent } from './child.component';5import { ParentComponent } from './parent.component';6describe('ParentComponent', () => {7 let component: ParentComponent;8 let fixture: ComponentFixture<ParentComponent>;9 beforeEach(async(() => {10 TestBed.configureTestingModule({11 declarations: [ParentComponent, MockComponent(ChildComponent)],12 imports: [MockModule],13 }).compileComponents();14 }));15 beforeEach(() => {16 fixture = TestBed.createComponent(ParentComponent);17 component = fixture.componentInstance;18 fixture.detectChanges();19 });20 it('should create', () => {21 expect(component).toBeTruthy();22 });23 it('should call ngAfterContentChecked', () => {24 const spy = spyOn(component, 'ngAfterContentChecked');25 fixture.detectChanges();26 expect(spy).toHaveBeenCalled();27 });28 it('should call ngAfterContentChecked', () => {29 const childComponent = fixture.debugElement.query(By.css('app-child'));30 const spy = spyOn(childComponent.componentInstance, 'ngAfterContentChecked');31 fixture.detectChanges();32 expect(spy).toHaveBeenCalled();33 });34});35import { Component, Input, OnChanges, SimpleChanges } from '@angular/core';36@Component({37 <div>{{ data }}</div>38})39export class ChildComponent implements OnChanges {40 @Input() data: string;41 ngOnChanges(changes: SimpleChanges) {42 console.log('child ngOnChanges', changes);43 }44 ngAfterContentChecked() {45 console.log('child ngAfterContentChecked');46 }47}48import { Component, OnChanges, SimpleChanges } from '@angular/core';49@Component({50})51export class ParentComponent implements OnChanges {52 data = 'parent data';53 ngOnChanges(changes: SimpleChanges) {54 console.log('parent ngOnChanges', changes);55 }56 ngAfterContentChecked() {57 console.log('parent ngAfterContentChecked');58 }59}60parent ngOnChanges { }61child ngOnChanges { data: { currentValue: 'parent data', previousValue: undefined, isFirstChange: () => true

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Using AI Code Generation

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1import { Component, ContentChild, Directive, Input, TemplateRef, ViewChild } from '@angular/core';2import { MockBuilder, MockRender, ngMocks } from 'ng-mocks';3@Directive({4})5export class MyDirective {6 @Input() public myDirective: string;7}8@Component({9})10export class TargetComponent {11 @ContentChild(TemplateRef, { static: true }) public readonly template!: TemplateRef<any>;12 @ViewChild(MyDirective, { static: true }) public readonly directive!: MyDirective;13 public visible = false;14 public value = 'init';15 public ngAfterContentChecked(): void {16 this.value = 'changed';17 }18}19describe('TargetComponent', () => {20 beforeEach(() => MockBuilder(TargetComponent));21 it('works', () => {22 const fixture = MockRender(TargetComponent);23 expect(ngMocks.formatText(fixture)).toEqual('init');24 fixture.componentInstance.visible = true;25 fixture.detectChanges();26 expect(ngMocks.formatText(fixture)).toEqual('changed');27 });28});

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Using AI Code Generation

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1import { AfterContentChecked, Component, Input } from '@angular/core';2import { MockBuilder, MockRender } from 'ng-mocks';3@Component({4 <div>{{ text }}</div>5})6class TestComponent implements AfterContentChecked {7 @Input()8 public text: string;9 public ngAfterContentChecked(): void {10 console.log('ngAfterContentChecked called');11 }12}13describe('TestComponent', () => {14 beforeEach(() => MockBuilder(TestComponent));15 it('should log ngAfterContentChecked', () => {16 const spy = spyOn(TestComponent.prototype, 'ngAfterContentChecked');17 MockRender(TestComponent, { text: 'test' });18 expect(spy).toHaveBeenCalled();19 });20});21import { AfterContentChecked, Component, Input } from '@angular/core';22import { MockBuilder, MockRender } from 'ng-mocks';23@Component({24 <div>{{ text }}</div>25})26class TestComponent implements AfterContentChecked {27 @Input()28 public text: string;29 public ngAfterContentChecked(): void {30 console.log('ngAfterContentChecked called');31 }32}33describe('TestComponent', () => {34 beforeEach(() => MockBuilder(TestComponent));35 it('should log ngAfterContentChecked', () => {36 const spy = spyOn(TestComponent.prototype, 'ngAfterContentChecked');37 MockRender(TestComponent, { text: 'test' });38 expect(spy).toHaveBeenCalled();39 });40});41import { AfterContentChecked, Component, Input } from '@angular/core';42import { MockBuilder, MockRender } from 'ng-mocks';43@Component({44 <div>{{ text }}</div>45})46class TestComponent implements AfterContentChecked {47 @Input()48 public text: string;49 public ngAfterContentChecked(): void {50 console.log('ngAfterContentChecked called');51 }52}53describe('TestComponent', () => {54 beforeEach(() => MockBuilder(TestComponent));55 it('should log ngAfterContentChecked', () => {56 const spy = spyOn(TestComponent.prototype, 'ngAfterContentChecked');

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Using AI Code Generation

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1import { Component, AfterContentChecked, Input } from '@angular/core';2import { MockComponent } from 'ng-mocks';3@Component({4})5export class TestComponent implements AfterContentChecked {6 @Input() show = true;7 ngAfterContentChecked() {8 console.log('ngAfterContentChecked');9 }10}11@Component({12})13export class TestComponentMock implements AfterContentChecked {14 @Input() show = true;15 ngAfterContentChecked() {16 console.log('ngAfterContentChecked');17 }18}19const MockTestComponent = MockComponent(TestComponent, TestComponentMock);20@Component({21})22export class AppComponent {23 show = true;24}25describe('AppComponent', () => {26 beforeEach(() => {27 TestBed.configureTestingModule({28 });29 });30 it('should create the app', () => {31 const fixture = TestBed.createComponent(AppComponent);32 const app = fixture.debugElement.componentInstance;33 expect(app).toBeTruthy();34 });35 it('should show ngAfterContentChecked method', () => {36 const fixture = TestBed.createComponent(AppComponent);37 const app = fixture.debugElement.componentInstance;38 app.show = false;39 fixture.detectChanges();40 expect(fixture.nativeElement.querySelector('div').textContent).toBe('');41 });42});43To avoid this issue, we need to mock the ngAfterContentChecked method. To do this, we need to import the MockRender method from ng-mocks. We need to pass

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Using AI Code Generation

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1import { AfterContentChecked, Component, Input } from '@angular/core';2@Component({3})4export class AppComponent implements AfterContentChecked {5 constructor() {6 console.log('constructor');7 }8 ngAfterContentChecked() {9 console.log('ngAfterContentChecked');10 }11}12import { ComponentFixture, TestBed } from '@angular/core/testing';13import { AppComponent } from './app.component';14describe('AppComponent', () => {15 let component: AppComponent;16 let fixture: ComponentFixture<AppComponent>;17 beforeEach(async () => {18 await TestBed.configureTestingModule({19 }).compileComponents();20 });21 beforeEach(() => {22 fixture = TestBed.createComponent(AppComponent);23 component = fixture.componentInstance;24 fixture.detectChanges();25 });26 it('should call ngAfterContentChecked', () => {27 spyOn(component, 'ngAfterContentChecked');28 fixture.detectChanges();29 expect(component.ngAfterContentChecked).toHaveBeenCalled();30 });31});32ngAfterContentChecked() method of ng-mocks33import { AfterContentChecked, Component, Input } from '@angular/core';34@Component({35})36export class AppComponent implements AfterContentChecked {37 constructor() {38 console.log('constructor');39 }40 ngAfterContentChecked() {41 console.log('ngAfterContentChecked');42 }43}44import { ComponentFixture, TestBed } from '@angular/core/testing';45import { AppComponent } from './app.component';46describe('AppComponent', () => {47 let component: AppComponent;48 let fixture: ComponentFixture<AppComponent>;49 beforeEach(async () => {50 await TestBed.configureTestingModule({51 }).compileComponents();52 });53 beforeEach(() => {54 fixture = TestBed.createComponent(AppComponent);55 component = fixture.componentInstance;

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