public async Task CreateAlbumAsyncTest() { // Arrange var albumRepoMock = new Mock <IAlbumRepository>(); albumRepoMock.Setup(mock => mock.CreateAlbumAsync(It.Is((NewAlbumDataDto dataDto) => ( dataDto.Name == "Test" && dataDto.ArtistId == 1 )))) .ReturnsAsync(new AlbumDataDto { Id = 1, ArtistId = 1, Name = "Test", CoverArt = "", }) .Verifiable(); var albumCollection = new AlbumCollection(albumRepoMock.Object, _dependencyMapper); // Act var album = await albumCollection.CreateAlbumAsync(1, "Test"); // Assert albumRepoMock.Verify(); Assert.AreEqual(1, album.Id); Assert.AreEqual("Test", album.Name); }