public Either <DomainError, CommandResult> Handle(AddTrackToPLayList command)
{
var playList = playListPersistence.GetPlayList(command.PlaylistId);
var error = playList.Add(Track.With(command.TrackId));
if (error.IsSome)
{
return(error.ValueUnsafe());
}
playListPersistence.Persist(playList);
eventPublisher.Publish(playList.Events());
return(CommandResult.Success);
}
public void add_a_track_to_a_play_list()
{
var aTrackId = ATrack.Id;
var aPlaylistId = APlaylist.Id;
var aPlayList = new PlayListBuilder()
.WithId(aPlaylistId)
.Build();
playListPersistence.GetPlayList(aPlaylistId).Returns(aPlayList);
var command = new AddTrackToPLayList(aTrackId, aPlaylistId);
var result = addTrackToPlayListCommandHandler.Handle(command);
result.IsRight.Should().BeTrue();
VerifyPlayListHasBeenPersistedWith(aPlaylistId, aTrackId);
VerifyEventHasBeenRaised(new TrackHasBeenAddedToPlayList(aTrackId, aPlaylistId), eventPublisher);
}
public void do_not_add_a_track_twice()
{
var aTrackId = ATrack.Id;
var aPlaylistId = APlaylist.Id;
var aPlayList = new PlayListBuilder()
.WithId(aPlaylistId)
.AddTrack(new TrackBuilder()
.WithId(aTrackId)
.Build())
.Build();
playListPersistence.GetPlayList(aPlaylistId).Returns(aPlayList);
var command = new AddTrackToPLayList(aTrackId, aPlaylistId);
var result = addTrackToPlayListCommandHandler.Handle(command);
result.IsLeft.Should().BeTrue();
result.IfLeft(error => error.Should().Be(DomainError.CannotAddSameTrackTwice));
playListPersistence.DidNotReceive().Persist(Arg.Any <PlayList>());
eventPublisher.DidNotReceive().Publish(Arg.Any <List <Event> >());
}
public Either <DomainError, CommandResult> Process(AddTrackToPLayList command)
{
var commandHandler = tracksCommandHandlerCreator.CreateAddTrackToPlayListCommandHandler();
return(commandHandler.Handle(command));
}