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How to use elementFromHelper method in ng-mocks

Best JavaScript code snippet using ng-mocks

mock-helper.spec.ts

Source:mock-helper.spec.ts

1import {2  Component,3  Directive,4  EventEmitter,5  Input,6  Output,7} from '@angular/core';8import { TestBed } from '@angular/core/testing';9import { By } from '@angular/platform-browser';10import { isMockOf } from '../common/func.is-mock-of';11import { MockDirective } from '../mock-directive/mock-directive';12import { MockRender } from '../mock-render/mock-render';13import { ngMocks } from './mock-helper';14@Directive({15  exportAs: 'foo',16  selector: '[exampleDirective]',17})18export class ExampleDirective {19  @Input() public exampleDirective = '';20  @Output() public someOutput = new EventEmitter<boolean>();21  @Input('bah') public something = '';22  protected s: any;23  public performAction(s: string) {24    this.s = s;25    return this;26  }27}28@Directive({29  selector: '[exampleStructuralDirective]',30})31export class ExampleStructuralDirective {32  @Input() public exampleStructuralDirective = true;33}34@Component({35  selector: 'component-a',36  template: 'body-a',37})38export class AComponent {}39@Component({40  selector: 'component-b',41  template: 'body-b',42})43export class BComponent {}44describe('MockHelper:getDirective', () => {45  beforeEach(async () => {46    return TestBed.configureTestingModule({47      declarations: [48        MockDirective(ExampleDirective),49        MockDirective(ExampleStructuralDirective),50        AComponent,51        BComponent,52      ],53    }).compileComponents();54  });55  it('should return right attribute directive', () => {56    const fixture = MockRender(`57      <div exampleDirective></div>58    `);59    // Looking for original.60    const debugElement = fixture.debugElement.query(61      By.directive(ExampleDirective),62    );63    const element = ngMocks.get(debugElement, ExampleDirective);64    // Using helper.65    const elementFromHelper = ngMocks.get(66      fixture.debugElement.query(By.css('div')),67      ExampleDirective,68    );69    // Verification.70    expect(elementFromHelper).toBe(element);71  });72  it('should return right structural directive via getDirective', () => {73    const fixture = MockRender(`74      <div id="example-structural-directive" *exampleStructuralDirective="false">hi</div>75    `);76    // we need to render mock structural directives manually77    for (const instance of ngMocks.findInstances(78      fixture.debugElement,79      ExampleStructuralDirective,80    )) {81      if (isMockOf(instance, ExampleStructuralDirective, 'd')) {82        instance.__render();83      }84    }85    fixture.detectChanges();86    // Using helper.87    const elementFromHelper = ngMocks.get(88      fixture.debugElement.query(By.css('div')),89      ExampleStructuralDirective,90    );91    expect(elementFromHelper).toBeTruthy();92    if (!elementFromHelper) {93      return;94    }95    // Verification.96    expect(elementFromHelper.exampleStructuralDirective).toEqual(97      false,98    );99  });100  it('should return right structural directive via getDirectiveOrFail', () => {101    const fixture = MockRender(`102      <div id="example-structural-directive" *exampleStructuralDirective="false">hi</div>103    `);104    // we need to render mock structural directives manually105    for (const instance of ngMocks.findInstances(106      fixture.debugElement,107      ExampleStructuralDirective,108    )) {109      if (isMockOf(instance, ExampleStructuralDirective, 'd')) {110        instance.__render();111      }112    }113    fixture.detectChanges();114    // Using helper.115    const elementFromHelper = ngMocks.get(116      fixture.debugElement.query(By.css('div')),117      ExampleStructuralDirective,118    );119    // Verification.120    expect(elementFromHelper.exampleStructuralDirective).toEqual(121      false,122    );123  });124  it('find selector: T', () => {125    const fixture = MockRender('<component-a></component-a>');126    const componentA = ngMocks.find(fixture.debugElement, AComponent);127    expect(componentA.componentInstance).toEqual(128      jasmine.any(AComponent),129    );130    expect(() => ngMocks.find(componentA, BComponent)).toThrowError(131      'Cannot find an element via ngMocks.find(BComponent)',132    );133  });134  it('find selector: string', () => {135    const fixture = MockRender('<component-b></component-b>');136    const componentB = ngMocks.find(137      fixture.debugElement,138      'component-b',139    );140    expect(componentB.componentInstance).toEqual(141      jasmine.any(BComponent),142    );143    expect(() => ngMocks.find(componentB, AComponent)).toThrowError(144      'Cannot find an element via ngMocks.find(AComponent)',145    );146  });147  it('find selector: T', () => {148    const fixture = MockRender('<component-a></component-a>');149    const componentA = ngMocks.find(fixture.debugElement, AComponent);150    expect(componentA.componentInstance).toEqual(151      jasmine.any(AComponent),152    );153    const componentB = ngMocks.find(154      fixture.debugElement,155      BComponent,156      null,157    );158    expect(componentB).toBe(null);159  });160  it('find selector: string', () => {161    const fixture = MockRender('<component-b></component-b>');162    const componentB = ngMocks.find(163      fixture.debugElement,164      'component-b',165    );166    expect(componentB.componentInstance).toEqual(167      jasmine.any(BComponent),168    );169    const componentA = ngMocks.find(170      fixture.debugElement,171      'component-a',172      null,173    );174    expect(componentA).toBe(null);175  });176  it('find selector: missed string', () => {177    const fixture = MockRender('<component-b></component-b>');178    expect(() =>179      ngMocks.find(fixture.debugElement, 'component-a'),180    ).toThrowError(/Cannot find an element/);181  });182  it('findAll selector: T', () => {183    const fixture = MockRender(184      '<component-a></component-a><component-a></component-a>',185    );186    const componentA = ngMocks.findAll(fixture, AComponent);187    expect(componentA.length).toBe(2);188    expect(componentA[0].componentInstance).toEqual(189      jasmine.any(AComponent),190    );191    expect(componentA[1].componentInstance).toEqual(192      jasmine.any(AComponent),193    );194    const componentB = ngMocks.findAll(195      fixture.debugElement,196      BComponent,197    );198    expect(componentB.length).toBe(0);199  });200  it('findAll selector: string', () => {201    const fixture = MockRender(202      '<component-b></component-b><component-b></component-b>',203    );204    const componentB = ngMocks.findAll(fixture, 'component-b');205    expect(componentB.length).toEqual(2);206    expect(componentB[0].componentInstance).toEqual(207      jasmine.any(BComponent),208    );209    expect(componentB[0].componentInstance).toEqual(210      jasmine.any(BComponent),211    );212    const componentA = ngMocks.findAll(213      fixture.debugElement,214      'component-a',215    );216    expect(componentA.length).toBe(0);217  });218  it('findInstance throws an error', () => {219    const fixture = MockRender('<component-a></component-a>');220    expect(() =>221      ngMocks.findInstance(fixture.debugElement, BComponent),222    ).toThrowError(223      /Cannot find an instance via ngMocks.findInstance\(BComponent\)/,224    );225  });226  it('findInstance returns default value', () => {227    const fixture = MockRender('<component-a></component-a>');228    const instance = ngMocks.findInstance(229      fixture.debugElement,230      BComponent,231      undefined,232    );233    expect(instance).toBeUndefined();234  });235  it('input returns emitter', () => {236    const fixture = MockRender('<div exampleDirective="5"></div>');237    const node = ngMocks.find(fixture.debugElement, 'div');238    const input = ngMocks.input(node, 'exampleDirective');239    expect(input).toEqual('5');240  });241  it('input returns default value', () => {242    const fixture = MockRender('<div exampleDirective="5"></div>');243    const node = ngMocks.find(fixture.debugElement, 'div');244    const input = ngMocks.input(node, 'default', undefined);245    expect(input).toBeUndefined();246  });247  it('input throws', () => {248    const fixture = MockRender('<div></div>');249    const node = ngMocks.find(fixture.debugElement, 'div');250    expect(() => ngMocks.input(node, 'default')).toThrowError(251      /Cannot find default input/,252    );253  });254  it('output returns emitter', () => {255    const spy = jasmine.createSpy('someOutput');256    const fixture = MockRender(257      '<div (someOutput)="spy($event)" exampleDirective></div>',258      {259        spy,260      },261    );262    const node = ngMocks.find(fixture.debugElement, 'div');263    const output = ngMocks.output(node, 'someOutput');264    output.emit(true);265    expect(spy).toHaveBeenCalledWith(true);266  });267  it('output returns default value', () => {268    const spy = jasmine.createSpy('someOutput');269    const fixture = MockRender(270      '<div (someOutput)="spy($event)" exampleDirective></div>',271      {272        spy,273      },274    );275    const node = ngMocks.find(fixture.debugElement, 'div');276    const output = ngMocks.output(node, 'default', undefined);277    expect(output).toBeUndefined();278  });279  it('output throws', () => {280    const fixture = MockRender('<div></div>');281    const node = ngMocks.find(fixture.debugElement, 'div');282    expect(() => ngMocks.output(node, 'default')).toThrowError(283      /Cannot find default output/,284    );285  });286  it('get returns default value', () => {287    const fixture = MockRender('<div></div>');288    const actual = ngMocks.get(289      fixture.debugElement,290      ExampleDirective,291      undefined,292    );293    expect(actual).toBeUndefined();294  });295  it('get throws an error', () => {296    const fixture = MockRender('<div></div>');297    expect(() =>298      ngMocks.get(fixture.debugElement, ExampleDirective),299    ).toThrowError(/Cannot find ExampleDirective/);300  });...

Using AI Code Generation

1import { elementFromHelper } from 'ng-mocks';2import { AppModule } from './app.module';3import { AppComponent } from './app.component';4describe('AppComponent', () => {5  it('should create the app', () => {6    const fixture = MockRender(AppComponent, AppModule);7    const app = elementFromHelper(fixture);8    expect(app).toBeDefined();9  });10});11import { Component } from '@angular/core';12@Component({13})14export class AppComponent {15  title = 'my-app';16}17<h1> {{ title }} </h1>18h1 {19  color: #333;20}21import { NgModule } from '@angular/core';22import { BrowserModule } from '@angular/platform-browser';23import { AppComponent } from './app.component';24@NgModule({25  imports: [BrowserModule],26})27export class AppModule {}28{29  "compilerOptions": {30  },31}32{33  "compilerOptions": {34    "importHelpers": true,35  }36}37module.exports = function(config)

Using AI Code Generation

1import {elementFromHelper} from 'ng-mocks';2import {AppComponent} from './app.component';3describe('AppComponent', () => {4  it('should create the app', () => {5    const fixture = elementFromHelper(AppComponent);6    expect(fixture).toBeTruthy();7  });8});

Using AI Code Generation

1import { elementFromHelper } from 'ng-mocks';2import { TestComponent } from './test.component';3import { TestModule } from './test.module';4describe('TestComponent', () => {5  it('should create', () => {6    const fixture = MockHelper.createFixture(TestComponent, TestModule);7    const component = elementFromHelper(fixture);8    expect(component).toBeTruthy();9  });10});11import { Component } from '@angular/core';12@Component({13})14export class TestComponent {}15import { NgModule } from '@angular/core';16import { CommonModule } from '@angular/common';17import { TestComponent } from './test.component';18@NgModule({19  imports: [CommonModule],20})21export class TestModule {}

Using AI Code Generation

1import { elementFromHelper } from 'ng-mocks';2import { MyComponent } from './my.component';3describe('MyComponent', () => {4  let fixture: ComponentFixture<MyComponent>;5  beforeEach(async(() => {6    TestBed.configureTestingModule({7    }).compileComponents();8  }));9  beforeEach(() => {10    fixture = TestBed.createComponent(MyComponent);11    fixture.detectChanges();12  });13  it('should create', () => {14    const element = elementFromHelper(fixture, 'my-component');15    expect(element).toBeTruthy();16  });17});18import { Component } from '@angular/core';19@Component({20})21export class MyComponent {}22import { elementFromHelper } from 'ng-mocks';23import { MyComponent } from './my.component';24describe('MyComponent', () => {25  let fixture: ComponentFixture<MyComponent>;26  beforeEach(async(() => {27    TestBed.configureTestingModule({28    }).compileComponents();29  }));30  beforeEach(() => {31    fixture = TestBed.createComponent(MyComponent);32    fixture.detectChanges();33  });34  it('should create', () => {35    const element = elementFromHelper(fixture, 'my-component');36    expect(element).toBeTruthy();37  });38});39import { Component } from '@angular/core';40@Component({41})42export class MyComponent {}43import { elementFromHelper } from 'ng-mocks';44import { MyComponent } from './my.component';45describe('MyComponent', () => {46  let fixture: ComponentFixture<MyComponent>;47  beforeEach(async(() => {48    TestBed.configureTestingModule({49    }).compileComponents();50  }));51  beforeEach(() => {52    fixture = TestBed.createComponent(MyComponent);53    fixture.detectChanges();54  });55  it('should create', () => {56    const element = elementFromHelper(fixture, 'my-component');57    expect(element).toBeTruthy();58  });59});60import { Component } from '@angular/core';61@Component({62})63export class MyComponent {}64import { elementFromHelper } from 'ng-mocks';65import

Using AI Code Generation

1import { elementFromHelper } from 'ng-mocks';2import { MyComponent } from './my.component';3describe('MyComponent', () => {4  it('should render', () => {5    const fixture = MockRender(MyComponent);6    const element = elementFromHelper(fixture, MyComponent);7    expect(element).toBeDefined();8  });9});10import { elementFromHelper } from 'ng-mocks';11import { MyComponent } from './my.component';12describe('MyComponent', () => {13  it('should render', () => {14    const fixture = MockRender(MyComponent);15    const element = elementFromHelper(fixture, MyComponent);16    const button = element.query((node) => node.name === 'button');17    expect(button).toBeDefined();18  });19});20import { elementFromHelper } from 'ng-mocks';21import { MyComponent } from './my.component';22describe('MyComponent', () => {23  it('should render', () => {24    const fixture = MockRender(MyComponent);25    const element = elementFromHelper(fixture, MyComponent);26    const button = element.query((node) => node.name === 'button');27    expect(button.nativeElement).toBeDefined();28  });29});30import { elementFromHelper } from 'ng-mocks';31import { MyComponent } from './my.component';32describe('MyComponent', () => {33  it('should render', () => {34    const fixture = MockRender(MyComponent);

Using AI Code Generation

1import { elementFromHelper } from 'ng-mocks';2import { TestComponent } from './test.component';3describe('TestComponent', () => {4  it('should render title', () => {5    const fixture = createComponent(TestComponent);6    const element = elementFromHelper(fixture);7    expect(element.textContent).toContain('Welcome to test!');8  });9});10import { Component } from '@angular/core';11@Component({12  template: `<h1>Welcome to {{ title }}!</h1>`,13})14export class TestComponent {15  title = 'test';16}17<h1>Welcome to {{ title }}!</h1>18import { createComponentFactory, Spectator } from '@ngneat/spectator';19import { TestComponent } from './test.component';20describe('TestComponent', () => {21  let spectator: Spectator<TestComponent>;22  const createComponent = createComponentFactory(TestComponent);23  it('should render title', () => {24    spectator = createComponent();25    expect(spectator.element.textContent).toContain('Welcome to test!');26  });27});28import { Component } from '@angular/core';29@Component({30  template: `<h1>Welcome to {{ title }}!</h1>`,31})32export class TestComponent {33  title = 'test';34}35<h1>Welcome to {{ title }}!</h1>36import { TestBed } from '@angular/core/testing';37import { TestComponent } from './test.component';38describe('TestComponent', () => {39  beforeEach(async () => {40    await TestBed.configureTestingModule({41    }).compileComponents();42  });43  it('should render title', () => {44    const fixture = TestBed.createComponent(TestComponent);45    fixture.detectChanges();46    const element = fixture.nativeElement;47    expect(element.textContent).toContain('Welcome to test!');48  });49});50import { Component } from '@angular/core';51@Component({52  template: `<h1>Welcome to {{ title }}!</h1>`,53})54export class TestComponent {55  title = 'test';56}57<h1>Welcome to {{ title }}!</h

Using AI Code Generation

1import { elementFromHelper } from 'ng-mocks';2const fixture = MockRender(`3  <button id="btn" (click)="onClick()">Click Me</button>4`);5const button = elementFromHelper(fixture, '#btn');6button.click();7expect().toHaveBeenCalled();8import { elementFromHelper } from 'ng-mocks';9const fixture = MockRender(`10  <button id="btn" (click)="onClick()">Click Me</button>11`);12const button = elementFromHelper(fixture, '#btn');13button.click();14expect().toHaveBeenCalled();15import { elementFromHelper } from 'ng-mocks';16const fixture = MockRender(`17  <button id="btn" (click)="onClick()">Click Me</button>18`);19const button = elementFromHelper(fixture, '#btn');20button.click();21expect().toHaveBeenCalled();22import { elementFromHelper } from 'ng-mocks';23const fixture = MockRender(`24  <button id="btn" (click)="onClick()">Click Me</button>25`);26const button = elementFromHelper(fixture, '#btn');27button.click();28expect().toHaveBeenCalled();29import { elementFromHelper } from 'ng-mocks';30const fixture = MockRender(`31  <button id="btn" (click)="onClick()">Click Me</button>32`);33const button = elementFromHelper(fixture, '#btn');34button.click();35expect().toHaveBeenCalled();36import { elementFromHelper } from 'ng-mocks';37const fixture = MockRender(`38  <button id="btn" (click)="onClick()">Click Me</button>39`);40const button = elementFromHelper(fixture, '#btn');41button.click();42expect().toHaveBeenCalled();43import { elementFromHelper } from 'ng-mocks';44const fixture = MockRender(`45  <button id="btn" (click)="onClick()">Click Me</button>46`);47const button = elementFromHelper(fixture, '#btn');48button.click();49expect().toHaveBeenCalled();

Using AI Code Generation

1import { elementFromHelper } from 'ng-mocks';2const element = elementFromHelper({selector: 'my-component', inputs: {name: 'test'}});3element.click();4import { elementFromHelper } from 'ng-mocks';5const element = elementFromHelper({selector: 'my-component', inputs: {name: 'test'}, outputs: {myEvent: () => {}}});6element.click();7import { elementFromHelper } from 'ng-mocks';8const element = elementFromHelper({selector: 'my-component', inputs: {name: 'test'}, outputs: {myEvent: () => {}}, children: [{selector: 'my-child-component', inputs: {name: 'test'}}]});9element.click();10import { elementFromHelper } from 'ng-mocks';11const element = elementFromHelper({selector: 'my-component', inputs: {name: 'test'}, outputs: {myEvent: () => {}}, children: [{selector: 'my-child-component', inputs: {name: 'test'}}]});12element.click();13import { elementFromHelper } from 'ng-mocks';14const element = elementFromHelper({selector: 'my-component', inputs: {name: 'test'}, outputs: {myEvent: () => {}}, children: [{selector: 'my-child-component', inputs: {name: 'test'}}]});15element.click();16import { elementFromHelper } from 'ng-mocks';17const element = elementFromHelper({selector: 'my-component', inputs: {name: 'test'}, outputs: {myEvent: () => {}}, children

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