public void IsUserCreator_ReturnsCorrectResults() { // Arrange var context = this.ServiceProvider.GetRequiredService <WmipDbContext>(); var album1 = new Album { Id = 1, Name = "Abm1", Artist = new User { Id = "1", UserName = "******" } }; var album2 = new Album { Id = 2, Name = "Abm2", Artist = new User { Id = "2", UserName = "******" } }; context.Albums.AddRange(album1, album2); context.SaveChanges(); var albumsService = new AlbumsService(context); // Act var usernameResultTrue = albumsService.IsUserCreatorByName("ivan", 1); var usernameResultFalse = albumsService.IsUserCreatorByName("ivan", 2); var idResultTrue = albumsService.IsUserCreatorById("1", 1); var idResultFalse = albumsService.IsUserCreatorById("1", 2); //Assert Assert.True(usernameResultTrue); Assert.False(usernameResultFalse); Assert.True(idResultTrue); Assert.False(idResultFalse); }