Angular 5 service failing to pass unit tests with (NullInjectorError: No provider for HttpClient!)

Question

I keep getting the following errors when running unit tests

Error: StaticInjectorError(DynamicTestModule)[ApiService -> HttpClient]: 
      StaticInjectorErro         


        

Answer 1

simply add it like this,

  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [
        HttpClientModule,
      ],
    }).compileComponents();
  });