CODE EXAMPLE FOR TYPESCRIPT

NullInjectorError: R3InjectorError(DynamicTestModule)[AdminTestCentersComponent -> ToastrService -> InjectionToken ToastConfig -> InjectionToken ToastConfig]: NullInjectorError: No provider for InjectionToken ToastConfig!

// Angular - Jasmine
// Error: NullInjectorError: R3InjectorError(DynamicTestModule)[AdminTestCentersComponent -> ToastrService -> InjectionToken ToastConfig -> InjectionToken ToastConfig]: NullInjectorError: No provider for InjectionToken ToastConfig!

beforeEach(async(() => {
    TestBed.configureTestingModule({
      imports: [ToastrModule.forRoot()],

    })
      .compileComponents();
}));