public async Task SongController_Destroy_ShouldReturnRedirectWithSuccessTempData()
{
//Arrenge
string successMessage = null;
int songId = 1;
var songService = this.GetAdminSongServiceBaseMock();
songService
.Setup(s => s.DeleteAsync(It.IsAny <int>()))
.ReturnsAsync(true);
var tempDate = new Mock <ITempDataDictionary>();
tempDate.SetupSet(t => t[WebConstants.TempDataSuccessMessageKey] = It.IsAny <string>())
.Callback((string key, object message) => successMessage = message as string);
var controller = new SongsController(null, songService.Object);
controller.TempData = tempDate.Object;
//Act
var result = await controller.Destroy(songId);
//Assert
successMessage.Should().Be("Song has been deleted successfully");
result.Should().BeOfType <RedirectToActionResult>();
result.As <RedirectToActionResult>().ActionName.Should().Be("ListAll");
}