public void When_MovePrevious_SongListHasPreviousSongs_ReturnsCorrectSongs()
{
// Arrange
var songList = new SongList
{
PlayMode = _noShuffleNoLoop,
Playlist = _bigPlaylist
};
for (int i = 0; i < _nbSongs; i++)
{
songList.MoveNext();
}
// Act
var previousSongs = new List <SongDto>();
for (int i = 0; i < _nbSongs; i++)
{
var song = songList.MovePrevious().CurrentSong;
previousSongs.Add(song);
}
// Assert
for (int i = 0; i < _nbSongs; i++)
{
Assert.AreEqual($"{_songPrefixBig}{_nbSongs - 1 - i}", previousSongs[i].Title);
}
}
public void When_PlayModeSet_MovePreviousFollowingSongsContainsCorrectSongs()
{
// Arrange
int goBack = 5;
var songList = new SongList
{
PlayMode = _noShuffleLoopPlaylist,
Playlist = _bigPlaylist
};
for (int i = 0; i < _nbSongs; i++) // play some songs
{
songList.MoveNext();
}
for (int i = 0; i < goBack; i++) // go back 5 songs
{
songList.MovePrevious();
}
// Act
songList.PlayMode = _noShuffleNoLoop;
var songs = songList.GetFollowingSongs(_queueSize);
// Assert
for (int i = _nbSongs - goBack; i < _nbSongs; i++)
{
Assert.AreEqual($"{_songPrefixBig}{i}", songs[i - (_nbSongs - goBack)].Title);
}
}
public void When_CurrentSong_HasNoPreviousSongs_MovePreviousReturnsNull()
{
// Arrange
var songList = new SongList
{
PlayMode = _noShuffleLoopPlaylist,
Playlist = _smallPlaylist
};
// Act
var actual = songList.MovePrevious().CurrentSong;
// Assert
Assert.AreEqual(null, actual);
}
public void When_MovePrevious_SongListHasNoPreviousSongs_ReturnsNull()
{
// Arrange
var songList = new SongList
{
PlayMode = _noShuffleLoopPlaylist,
Playlist = _bigPlaylist
};
// Act
var song = songList.MovePrevious().CurrentSong;
// Assert
Assert.IsNull(song);
}
public void When_MovePrevious_CalledTwice_SecondCallDoesNothing()
{
// Arrange
var songList = new SongList
{
PlayMode = _noShuffleNoLoop,
Playlist = _bigPlaylist
};
var expected = songList.CurrentSong;
// Act
var actual = songList.MovePrevious().MovePrevious().MoveNext().CurrentSong;
// Assert
Assert.AreEqual(expected, actual);
}
public void When_CurrentSongGet_HasFollowingSongs_MovePreviousReturnsCorrectSong()
{
// Arrange
var songList = new SongList
{
PlayMode = _noShuffleLoopPlaylist,
Playlist = _smallPlaylist
};
// Act
var expected = songList.MoveNext().CurrentSong;
songList.MoveNext();
var actual = songList.MovePrevious().CurrentSong;
// Assert
Assert.AreEqual(expected, actual);
}
