public async void FillEventGalleryTest() { //Arrange int eventId = 145; var picture = "StringInBase64"; _repoWrapper.Setup(x => x.Gallary.CreateAsync((It.IsAny <Gallary>()))); _repoWrapper.Setup(x => x.EventGallary.CreateAsync((It.IsAny <EventGallary>()))); _eventBlobStorage.Setup(x => x.UploadBlobAsync(It.IsAny <IFormFile>(), It.IsAny <string>())); _eventBlobStorage.Setup(x => x.GetBlobBase64Async(It.IsAny <string>())) .ReturnsAsync(picture); //Act var eventGalleryManager = new EventGalleryManager(_repoWrapper.Object, _eventBlobStorage.Object); var methodResult = await eventGalleryManager.AddPicturesAsync(eventId, FakeFiles()); //Assert Assert.NotNull(methodResult); Assert.IsType <List <EventGalleryDTO> >(methodResult); }