public void DoesAlbumExist_ReturnsTrueIfAlbumExists() { // Arrange var context = this.ServiceProvider.GetRequiredService <WmipDbContext>(); var album = new Album { Id = 1, Name = "Abm" }; context.Albums.Add(album); context.SaveChanges(); var albumsService = new AlbumsService(context); // Act var exising = albumsService.DoesAlbumExist(1, "Abm"); var nonExising = albumsService.DoesAlbumExist(2, "Abm"); //Assert Assert.True(exising); Assert.False(nonExising); }