How to use TOKEN_EXISTING_KEEP method in ng-mocks

Best JavaScript code snippet using ng-mocks

test.spec.ts

Source:test.spec.ts

1import { Injectable, InjectionToken, NgModule } from '@angular/core';2import { MockBuilder, ngMocks } from 'ng-mocks';3@Injectable()4class Exist1Service {5  public readonly name = 'exist1';6}7@Injectable()8class Exist2Service {9  public readonly name = 'exist2';10}11const TOKEN_EXISTING_MOCK = new InjectionToken('MOCK');12const TOKEN_EXISTING_KEEP = new InjectionToken('KEEP');13@NgModule({14  providers: [15    Exist1Service,16    Exist2Service,17    {18      provide: TOKEN_EXISTING_MOCK,19      useExisting: Exist1Service,20    },21    {22      provide: TOKEN_EXISTING_KEEP,23      useExisting: Exist2Service,24    },25  ],26})27class TargetModule {}28// fix for jest without jasmine assertions29const assertion: any =30  typeof jasmine === 'undefined' ? expect : jasmine;31// We should do nothing about a useExisting provider, because32// the question comes whether its pointer has been replaced with a mock copy or not.33describe('tokens-existing', () => {34  ngMocks.faster();35  beforeEach(() =>36    MockBuilder().mock(TargetModule).keep(Exist2Service),37  );38  it('resolves TOKEN_EXISTING_MOCK as a mock service', () => {39    const actual = ngMocks.findInstance<any>(TOKEN_EXISTING_MOCK);40    expect(actual).toEqual(assertion.any(Exist1Service));41    expect(actual.name).toBeUndefined();42  });43  it('resolves TOKEN_EXISTING_KEEP as a real service', () => {44    const actual = ngMocks.findInstance<any>(TOKEN_EXISTING_KEEP);45    expect(actual).toEqual(assertion.any(Exist2Service));46    expect(actual.name).toEqual('exist2');47  });...

Using AI Code Generation

1import { MockBuilder, MockRender, ngMocks } from 'ng-mocks';2import { AppModule } from './app.module';3import { AppComponent } from './app.component';4const mockService = ngMocks.defaultMock(AppService, {5  getData: () => 'mocked',6});7const mockComponent = ngMocks.defaultMock(AppComponent, {8});9const mockComponent2 = ngMocks.defaultMock(AppComponent, {10});11describe('AppComponent', () => {12  beforeEach(() => MockBuilder(AppComponent, AppModule));13  it('should render title', () => {14    const fixture = MockRender(AppComponent);15    expect(fixture.nativeElement.querySelector('h1').textContent).toContain(16    );17  });18});19import { NgModule } from '@angular/core';20import { BrowserModule } from '@angular/platform-browser';21import { AppComponent } from './app.component';22import { AppService } from './app.service';23@NgModule({24  imports: [BrowserModule],25})26export class AppModule {}27import { Component } from '@angular/core';28import { AppService } from './app.service';29@Component({30      {{ getData() }}31})32export class AppComponent {33  constructor(private readonly service: AppService) {}34  public getData(): string {35    return this.service.getData();36  }37}38import { Injectable } from '@angular/core';39@Injectable()40export class AppService {41  public getData(): string {42    return 'real';43  }44}45import { TestBed } from '@angular/core/testing';46import { AppService } from './app.service';47describe('AppService', () => {48  let service: AppService;49  beforeEach(() => {50    TestBed.configureTestingModule({});51    service = TestBed.inject(AppService);

Using AI Code Generation

1import {TOKEN_EXISTING_KEEP} from 'ng-mocks';2import {APP_CONFIG} from './app-config';3export const config = {4  useValue: {5  },6};

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