Agfdhyk

I have a problem with Karma-Tests. When I run my tests, sometimes I have this error:

HeadlessChrome 70.0.3538 (Windows 10.0.0) ERROR

  {

    "message": "An error was thrown in afterAlln[object ErrorEvent] thrown",

    "str": "An error was thrown in afterAlln[object ErrorEvent] thrown"

  }

If I do not change anything and run the same tests again, the test may not fail.

I've read that it could be a bug with asynchronous tests (https://github.com/karma-runner/karma/issues/2811#issuecomment-407600850), so I removed all my async and fakeasync tests. However, that still doesn't solve the problem. Without the async and fakeasync tests, I have this error:

HeadlessChrome 70.0.3538 (Windows 10.0.0) MyComponent should create FAILED

        [object ErrorEvent] thrown

HeadlessChrome 70.0.3538 (Windows 10.0.0): Executed 50 of 55 (1 FAILED) (0 secs / 0 secs)

But in the test of this Component i can't find an error:

describe('MyComponent', () => {

    let component: MyComponent;

    let fixture: ComponentFixture<MyComponent>;

    const zipService = jasmine.createSpyObj('ZipService', {

        search: of()

    });



    beforeEach(() => {

        TestBed.configureTestingModule({

            declarations: [MyComponent, OnOffSwitchComponent, TranslatePipeMock],

            imports: [

                NgbModule.forRoot(),

                FormsModule,

                ReactiveFormsModule

            ],

            providers: [

                {provide: TranslateService, useValue: translateServiceMock()},

                {provide: UtilService, useValue: utilMock()},

                {provide: ZipService, useValue: zipService}

            ]

        }).compileComponents();

        fixture = TestBed.createComponent(MyComponent);

        component = fixture.componentInstance;

        fixture.detectChanges();

    });



    it('should create', () => {

        expect(component).toBeTruthy();

    });

});

Does anyone have any idea what it could be about?