public void GetNextSongShouldReturnNextItem()
{
// Arrange
var playlist = new SimplePlaylist();
var song01 = @"C:\music\song01.mp3";
var song02 = @"C:\music\song02.mp3";
playlist.Add(song01);
playlist.Add(song02);
string nextSongPath;
// Act
nextSongPath = playlist.GetNextSongPath();
// Assert
Assert.Equal(song02, nextSongPath);
}
public void CountWithPlaylistWithItemsShouldReturnPlaylistItemCount()
{
// Arrange
var playlist = new SimplePlaylist();
var song01 = @"C:\music\song01.mp3";
var song02 = @"C:\music\song02.mp3";
playlist.Add(song01);
playlist.Add(song02);
int count;
// Act
count = playlist.Count;
// Assert
Assert.Equal(2, count);
}
public void GetPreviousSongPathSecondCallWithTwoItemsShouldReturnStringEmpty()
{
// Arrange
var playlist = new SimplePlaylist();
playlist.Add(@"C:\music\song01.mp3");
playlist.Add(@"C:\music\song02.mp3");
playlist.GetNextSongPath();
string previousSongPath;
// Act
playlist.GetPreviousSongPath();
previousSongPath = playlist.GetPreviousSongPath();
// Assert
Assert.Equal(string.Empty, previousSongPath);
}
public void GetPreviousSongPathWithMoreThanOneItemShouldReturnPreviousItem()
{
// Arrange
var playlist = new SimplePlaylist();
var song01 = @"C:\music\song01.mp3";
playlist.Add(song01);
playlist.Add(@"C:\music\song02.mp3");
playlist.GetNextSongPath();
string previousSongPath;
// Act
previousSongPath = playlist.GetPreviousSongPath();
// Assert
Assert.Equal(song01, previousSongPath);
}
public void AddWithEmptyShouldThrowArgumentNullException()
{
// Arrange
var playlist = new SimplePlaylist();
string item = string.Empty;
// Act & Assert
Assert.Throws <ArgumentNullException>(() => playlist.Add(item));
}
public void ClearWithItemsShouldClearPlaylist()
{
// Arrange
var playlist = new SimplePlaylist();
var song01 = @"C:\music\song01.mp3";
var song02 = @"C:\music\song02.mp3";
playlist.Add(song01);
playlist.Add(song02);
string currentSongPath;
// Act
playlist.Clear();
currentSongPath = playlist.GetCurrentSongPath();
// Assert
Assert.Equal(string.Empty, currentSongPath);
}
public void AddArrayWithEmptyItemShouldThrowArgumentException()
{
// Arrange
var playlist = new SimplePlaylist();
string[] items = { "file01.mp3", string.Empty, "file03.mp3" };
// Act & Assert
Assert.Throws <ArgumentException>(() => playlist.Add(items));
}
public void AddArrayWithNullShouldThrowArgumentNullException()
{
// Arrange
var playlist = new SimplePlaylist();
string[] items = null;
// Act & Assert
Assert.Throws <ArgumentNullException>(() => playlist.Add(items));
}
public void AddWithArrayShouldAddElementsToCollection()
{
// Arrange
var playlist = new SimplePlaylist();
var items = new [] { "file01.mp3", "file02.mp3", "file03.mp3" };
// Act
playlist.Add(items);
// Assert
Assert.Equal(3, playlist.Count);
}
public void GetPreviousSongPathWithOneItemShouldReturnStringEmpty()
{
// Arrange
var playlist = new SimplePlaylist();
playlist.Add(@"C:\music\song.mp3");
string previousSongPath;
// Act
previousSongPath = playlist.GetPreviousSongPath();
// Assert
Assert.Equal(string.Empty, previousSongPath);
}
public void GetCurrentSongWithOneItemShouldReturnItem()
{
// Arrange
var playlist = new SimplePlaylist();
var song01 = @"C:\music\song01.mp3";
playlist.Add(song01);
string currentSongPath;
// Act
currentSongPath = playlist.GetCurrentSongPath();
// Assert
Assert.Equal(song01, currentSongPath);
}