public void ApplicationLoadedEventHandler_IfNoPlaylistSessionDataExist_DoesNotLoadAnySongs()
{
// Arrange
var sessionServiceStub = new Mock <ISessionDataService>();
sessionServiceStub.Setup(x => x.GetData <PlaylistData>("SongPlaylistData", It.IsAny <CancellationToken>())).ReturnsAsync((PlaylistData)null);
var mocker = new AutoMocker();
mocker.Use(sessionServiceStub);
var target = mocker.CreateInstance <PersistentPlaylistViewModel>();
PlaylistLoadedEventArgs playlistLoadedEvent = null;
Messenger.Default.Register <PlaylistLoadedEventArgs>(this, e => e.RegisterEvent(ref playlistLoadedEvent));
NoPlaylistLoadedEventArgs noPlaylistLoadedEvent = null;
Messenger.Default.Register <NoPlaylistLoadedEventArgs>(this, e => e.RegisterEvent(ref noPlaylistLoadedEvent));
// Act
Messenger.Default.Send(new ApplicationLoadedEventArgs());
// Assert
target.Songs.Should().BeEmpty();
playlistLoadedEvent.Should().BeNull();
noPlaylistLoadedEvent.Should().NotBeNull();
}
public void ApplicationLoadedEventHandler_IfValidPlaylistSessionDataExist_LoadsPlaylistSongsCorrectly()
{
// Arrange
var playlistData = new PlaylistData
{
Songs = new[]
{
new PlaylistSongData {
Id = "song 0"
},
new PlaylistSongData {
Id = "song 1"
},
new PlaylistSongData {
Id = "song 2"
},
new PlaylistSongData {
Id = "song 3"
},
},
CurrentSongIndex = 1,
};
var songIds = new[]
{
new ItemId("song 0"),
new ItemId("song 1"),
new ItemId("song 2"),
new ItemId("song 3"),
};
var songs = new[]
{
new SongModel {
Id = new ItemId("song 0")
},
new SongModel {
Id = new ItemId("song 1")
},
new SongModel {
Id = new ItemId("song 2")
},
new SongModel {
Id = new ItemId("song 3")
},
};
// ISongsService.GetSongs() does not guarantee songs order.
var songsReturnedByService = new[] { songs[3], songs[2], songs[0], songs[1] };
var sessionServiceStub = new Mock <ISessionDataService>();
sessionServiceStub.Setup(x => x.GetData <PlaylistData>("SongPlaylistData", It.IsAny <CancellationToken>())).ReturnsAsync(playlistData);
var songServiceStub = new Mock <ISongsService>();
songServiceStub.Setup(x => x.GetSongs(songIds, It.IsAny <CancellationToken>())).ReturnsAsync(songsReturnedByService);
var mocker = new AutoMocker();
mocker.Use(sessionServiceStub);
mocker.Use(songServiceStub);
var target = mocker.CreateInstance <PersistentPlaylistViewModel>();
PlaylistLoadedEventArgs playlistLoadedEvent = null;
Messenger.Default.Register <PlaylistLoadedEventArgs>(this, e => e.RegisterEvent(ref playlistLoadedEvent));
NoPlaylistLoadedEventArgs noPlaylistLoadedEvent = null;
Messenger.Default.Register <NoPlaylistLoadedEventArgs>(this, e => e.RegisterEvent(ref noPlaylistLoadedEvent));
PlaylistChangedEventArgs playlistChangedEventArgs = null;
Messenger.Default.Register <PlaylistChangedEventArgs>(this, e => e.RegisterEvent(ref playlistChangedEventArgs));
var propertyChangedEvents = new List <PropertyChangedEventArgs>();
target.PropertyChanged += (_, e) => propertyChangedEvents.Add(e);
// Act
Messenger.Default.Send(new ApplicationLoadedEventArgs());
// Assert
target.Songs.Should().BeEquivalentTo(songs, x => x.WithStrictOrdering());
target.CurrentSong.Should().Be(songs[1]);
playlistLoadedEvent.VerifyPlaylistEvent(songs, 1);
noPlaylistLoadedEvent.Should().BeNull();
propertyChangedEvents.VerifySongListPropertyChangedEvents();
}
public void ApplicationLoadedEventHandler_IfSomeSongsAreNotFound_DoesNotLoadPlaylist()
{
// Arrange
var playlistData = new PlaylistData
{
Songs = new[]
{
new PlaylistSongData {
Id = "song 0"
},
new PlaylistSongData {
Id = "song 1"
},
new PlaylistSongData {
Id = "song 2"
},
},
CurrentSongIndex = 0,
};
var loadedSongs = new[]
{
new SongModel {
Id = new ItemId("song 0")
},
new SongModel {
Id = new ItemId("song 2")
},
};
var sessionServiceStub = new Mock <ISessionDataService>();
sessionServiceStub.Setup(x => x.GetData <PlaylistData>("SongPlaylistData", It.IsAny <CancellationToken>())).ReturnsAsync(playlistData);
var songServiceStub = new Mock <ISongsService>();
songServiceStub.Setup(x => x.GetSongs(It.IsAny <IEnumerable <ItemId> >(), It.IsAny <CancellationToken>())).ReturnsAsync(loadedSongs);
var mocker = new AutoMocker();
mocker.Use(sessionServiceStub);
mocker.Use(songServiceStub);
var target = mocker.CreateInstance <PersistentPlaylistViewModel>();
PlaylistLoadedEventArgs playlistLoadedEvent = null;
Messenger.Default.Register <PlaylistLoadedEventArgs>(this, e => e.RegisterEvent(ref playlistLoadedEvent));
NoPlaylistLoadedEventArgs noPlaylistLoadedEvent = null;
Messenger.Default.Register <NoPlaylistLoadedEventArgs>(this, e => e.RegisterEvent(ref noPlaylistLoadedEvent));
// Act
Messenger.Default.Send(new ApplicationLoadedEventArgs());
// Assert
target.Songs.Should().BeEmpty();
playlistLoadedEvent.Should().BeNull();
noPlaylistLoadedEvent.Should().NotBeNull();
}