Join the 1-day Testing & QA Summit featuring 15+ Expert Speakers.Register for FREE! Join TestMu Conference

How to use flushTestBed method in ng-mocks

Best JavaScript code snippet using ng-mocks

mock-render-factory.ts

Source:mock-render-factory.ts

...80const fixtureMessage = [81  'Forgot to flush TestBed?',82  'MockRender cannot be used without a reset after TestBed.get / TestBed.inject / TestBed.createComponent and another MockRender in the same test.',83  'If you want to mock a service before rendering, consider usage of MockRenderFactory or MockInstance.',84  'To flush TestBed, add a call of ngMocks.flushTestBed() before the call of MockRender, or pass `reset: true` to MockRender options.',85].join(' ');86const handleFixtureError = (e: any) => {87  const error = new Error(fixtureMessage);88  coreDefineProperty(error, 'parent', e);89  throw error;90};91const flushTestBed = (flags: Record<string, any>): void => {92  const globalFlags = ngMocksUniverse.global.get('flags');93  const testBed: any = getTestBed();94  if (flags.reset || (!testBed._instantiated && !testBed._testModuleRef)) {95    ngMocks.flushTestBed();96  } else if (globalFlags.onTestBedFlushNeed !== 'throw' && (testBed._instantiated || testBed._testModuleRef)) {97    if (globalFlags.onTestBedFlushNeed === 'warn') {98      console.warn(fixtureMessage);99    }100    ngMocks.flushTestBed();101  }102};103const generateFactoryInstall =104  (ctor: AnyType<any> & { providers?: AnyType<any> }, options: IMockRenderFactoryOptions) => () => {105    const testBed: TestBed & {106      _compiler?: {107        declarations?: Array<AnyType<any>>;108      };109      _declarations?: Array<AnyType<any>>;110      declarations?: Array<AnyType<any>>;111    } = getTestBed();112    // istanbul ignore next113    const existing = testBed._compiler?.declarations || testBed.declarations || testBed._declarations;114    if (!existing || existing.indexOf(ctor) === -1) {115      flushTestBed(options);116      try {117        const declarations: Array<AnyType<any>> = [];118        if (ctor.providers) {119          declarations.push(ctor.providers);120        }121        declarations.push(ctor);122        TestBed.configureTestingModule({123          declarations,124        });125      } catch (error) {126        handleFixtureError(error);127      }128    }129  };...

test.override.spec.ts

Source:test.override.spec.ts

...35    it('renders Target1Component', () => {36      expect(37        MockRender('<target2></target2>').nativeElement.innerHTML,38      ).toContain('<target2></target2>');39      ngMocks.flushTestBed();40      expect(41        MockRender('<target1></target1>').nativeElement.innerHTML,42      ).toContain('<target1>target1</target1>');43    });44  });45  describe('keeping Target2Component', () => {46    beforeEach(async () => {47      ngMocks.globalKeep(Target2Component);48      return TestBed.configureTestingModule({49        imports: [MockModule(TargetModule)],50      }).compileComponents();51    });52    it('renders Target2Component too', () => {53      expect(54        MockRender('<target2></target2>').nativeElement.innerHTML,55      ).toContain('<target2>target2</target2>');56      ngMocks.flushTestBed();57      expect(58        MockRender('<target1></target1>').nativeElement.innerHTML,59      ).toContain('<target1>target1</target1>');60    });61  });...

Using AI Code Generation

1import { flushTestBed } from 'ng-mocks';2import { TestBed } from '@angular/core/testing';3import { MockBuilder } from 'ng-mocks';4import { MockRender } from 'ng-mocks';5import { MyComponent } from './components/my.component';6describe('MyComponent', () => {7  afterEach(() => flushTestBed());8  it('should render', () => {9    MockBuilder(MyComponent);10    const fixture = MockRender(MyComponent);11    expect(fixture.nativeElement.innerHTML).toContain('Hello World');12  });13});14    ✓ should render (6ms)15      at Object.<anonymous> (node_modules/ng-mocks/lib/mock-builder/mock-builder.ts:34:16)16      at Object.<anonymous> (node_modules/ng-mocks/lib/mock-builder/mock-builder.ts:34:16)

Using AI Code Generation

1import { flushTestBed } from 'ng-mocks';2import { TestBed } from '@angular/core/testing';3import { AppComponent } from './app.component';4describe('AppComponent', () => {5  beforeEach(async () => {6    await TestBed.configureTestingModule({7    }).compileComponents();8  });9  afterEach(() => {10    flushTestBed();11  });12  it('should create the app', () => {13    const fixture = TestBed.createComponent(AppComponent);14    const app = fixture.componentInstance;15    expect(app).toBeTruthy();16  });17  it(`should have as title 'my-app'`, () => {18    const fixture = TestBed.createComponent(AppComponent);19    const app = fixture.componentInstance;20    expect(app.title).toEqual('my-app');21  });22  it('should render title', () => {23    const fixture = TestBed.createComponent(AppComponent);24    fixture.detectChanges();25    const compiled = fixture.nativeElement;26    expect(compiled.querySelector('.content span').textContent).toContain(27    );28  });29});30import { MockBuilder, MockRender } from 'ng-mocks';31import { AppComponent } from './app.component';32describe('AppComponent', () => {33  beforeEach(() => MockBuilder(AppComponent));34  it('should create the app', () => {35    const fixture = MockRender(AppComponent);36    const app = fixture.point.componentInstance;37    expect(app).toBeTruthy();38  });39  it(`should have as title 'my-app'`, () => {40    const fixture = MockRender(AppComponent);41    const app = fixture.point.componentInstance;42    expect(app.title).toEqual('my-app');43  });44  it('should render title', () => {45    const fixture = MockRender(AppComponent);46    fixture.detectChanges();47    const compiled = fixture.point.nativeElement;48    expect(compiled.querySelector('.content span').textContent).toContain(49    );50  });51});52import { MockBuilder, MockRender } from 'ng-mocks';53import { AppComponent } from './app.component';54describe('AppComponent', () => {55  beforeEach(() => MockBuilder(AppComponent));56  it('should create the app', () => {57    const fixture = MockRender(AppComponent);

Using AI Code Generation

1import { flushTestBed } from 'ng-mocks';2import { TestBed } from '@angular/core/testing';3describe('TestBed', () => {4  beforeEach(() => {5    TestBed.configureTestingModule({6      imports: [SomeModule],7    });8  });9  afterEach(() => {10    flushTestBed();11  });12  it('should create the app', () => {13    const fixture = TestBed.createComponent(SomeComponent);14    const app = fixture.debugElement.componentInstance;15    expect(app).toBeTruthy();16  });17});18import 'ng-mocks';19import '@angular/core/testing';20import { mock } from 'ts-mockito';21import { mock } from 'jest-mock-extended';

Using AI Code Generation

1import { flushTestBed } from 'ng-mocks';2import { TestBed } from '@angular/core/testing';3describe('test', () => {4  beforeEach(() => {5    TestBed.configureTestingModule({6    });7  });8  afterEach(() => {9    flushTestBed();10  });11  it('should work', () => {12    const fixture = TestBed.createComponent(TestComponent);13    expect(fixture).toBeDefined();14  });15});16import { Component } from '@angular/core';17@Component({18})19export class TestComponent {}20import { TestBed } from '@angular/core/testing';21import { MockBuilder, MockRender } from 'ng-mocks';22import { TestComponent } from './test.component';23describe('TestComponent', () => {24  beforeEach(() => MockBuilder(TestComponent));25  it('should work', () => {26    const fixture = MockRender(TestComponent);27    expect(fixture).toBeDefined();28  });29});

Using AI Code Generation

1import { flushTestBed } from 'ng-mocks';2describe('MyComponent', () => {3  beforeEach(() => {4    TestBed.configureTestingModule({5      imports: [MyModule]6    });7  });8  afterEach(() => {9    flushTestBed();10  });11  it('should create', () => {12    const fixture = TestBed.createComponent(MyComponent);13    const component = fixture.componentInstance;14    expect(component).toBeTruthy();15  });16});17import { flushTestBed } from 'ng-mocks';18import 'zone.js/dist/zone-testing';19import { getTestBed } from '@angular/core/testing';20import { BrowserDynamicTestingModule, platformBrowserDynamicTesting } from '@angular/platform-browser-dynamic/testing';21getTestBed().initTestEnvironment(22  platformBrowserDynamicTesting()23);24afterAll(() => {25  flushTestBed();26});27"architect": {28  "test": {29    "options": {30    }31  }32}33const { flushTestBed } = require('ng-mocks');34module.exports = function (config) {35  config.set({36      require('karma-jasmine'),37      require('karma-chrome-launcher'),38      require('karma-jasmine-html-reporter'),39      require('karma-coverage-istanbul-reporter'),40      require('@angular-devkit/build-angular/plugins/karma')41    client: {

Using AI Code Generation

1import { flushTestBed } from 'ng-mocks';2beforeEach(() => {3  TestBed.configureTestingModule({4      {5      },6  });7  TestBed.compileComponents();8});9afterEach(() => {10  flushTestBed();11});12import { flushTestBed } from 'ng-mocks';13describe('AppComponent', () => {14  beforeEach(() => {15    TestBed.configureTestingModule({16        {17        },18    });19    TestBed.compileComponents();20  });21  afterEach(() => {22    flushTestBed();23  });24});

Using AI Code Generation

1import { flushTestBed } from 'ng-mocks';2import { TestBed } from '@angular/core/testing';3describe('TestBed', () => {4  it('should reset TestBed', () => {5    TestBed.configureTestingModule({declarations: [TestComponent]});6    const fixture = TestBed.createComponent(TestComponent);7    fixture.detectChanges();8    expect(fixture).not.toBeNull();9    flushTestBed();10    expect(() => TestBed.createComponent(TestComponent)).toThrow();11  });12});13The flushTestBed() method is used in the ngAfterViewInit() method of the component. It is used

Using AI Code Generation

1import { TestBed } from '@angular/core/testing';2import { createComponentFactory, Spectator } from '@ngneat/spectator';3import { TestComponent } from './test.component';4describe('TestComponent', () => {5  let spectator: Spectator<TestComponent>;6  const createComponent = createComponentFactory({7  });8  beforeEach(() => {9    spectator = createComponent();10  });11  it('should create', () => {12    expect(spectator.component).toBeTruthy();13  });14  afterEach(() => {15    TestBed.resetTestingModule();16  });17});

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.