TestPlaylist.java

import static org.junit.Assert.*;				
import org.junit.Test;

public class TestPlaylist {
	   /*
     * Testers for testing each methods of our playlist object
     */
	 @Test
	 public void testToString() {
	    Playlist list = new Playlist();
	    Song song = new Song("Test", "TestArtist", 2019, 560);
	    list.add(song);
	    StringBuilder playlistAsString = new StringBuilder("Playlist:\n");
	    playlistAsString.append(song.toString());
	    playlistAsString.append("\n");
	    assertEquals(playlistAsString.toString(),list.toString());
	}
    @Test
    public void testLinkedList() {
    	Playlist playlist = new Playlist();
    	assertEquals(true,playlist.playlist.isEmpty());
    }
    @Test
    public void testAdd() {
    	Playlist list = new Playlist();
    	Song song = new Song("Test", "TestArtist", 2019, 560);
    	list.add(song);
    	assertEquals(song, list.getRecentSong());
    }
    @Test
    public void testDelete() {
    	Playlist list = new Playlist();
    	Song song = new Song("Test", "TestArtist", 2019, 560);
    	Song song2 = new Song("Test2", "TestArtist2", 2020, 570);
    	list.add(song);
    	list.add(song2);
    	list.delete(song2);
    	assertEquals(song.toString(), list.getRecentSong().toString());
    }
    @Test
    public void testGetPlaylistLength() {
    	Playlist list = new Playlist();
    	Song song = new Song("Test", "TestArtist", 2019, 560);
    	Song song2 = new Song("ATest2", "TestArtist2", 2020, 570);
    	list.add(song);
    	list.add(song2);
    	assertEquals(false, list.getPlaylistLength()); 	
    }
    @Test
    public void testSortByName() {
    	Playlist list = new Playlist();
    	Playlist sortedList = new Playlist();
    	Song song = new Song("Test", "TestArtist", 2019, 560);
    	Song song2 = new Song("ATest2", "TestArtist2", 2020, 570);
    	list.add(song);
    	list.add(song2);
    	sortedList.add(song2);
    	sortedList.add(song);
    	list.sortByName();
    	assertEquals(sortedList.toString(),list.toString());
    }
    @Test
    public void testSortByArtist() {
    	Playlist list = new Playlist();
    	Playlist sortedList = new Playlist();
    	Song song = new Song("Test", "TestArtist", 2019, 560);
    	Song song2 = new Song("ATest2", "ATestArtist2", 2020, 570);
    	list.add(song);
    	list.add(song2);
    	sortedList.add(song2);
    	sortedList.add(song);
    	list.sortByArtist();
    	assertEquals(sortedList.toString(),list.toString());
    }
    @Test
    public void testSortByYearOldtoNew() {
    	Playlist list = new Playlist();
    	Playlist sortedList = new Playlist();
    	Song song = new Song("Test", "TestArtist", 2019, 560);
    	Song song2 = new Song("ATest2", "ATestArtist2", 2018, 570);
    	list.add(song);
    	list.add(song2);
    	sortedList.add(song2);
    	sortedList.add(song);
    	list.sortByYearOldtoNew();
    	assertEquals(sortedList.toString(),list.toString());
    }
    @Test
    public void testSortByYearNewtoOld() {
    	Playlist list = new Playlist();
    	Playlist sortedList = new Playlist();
    	Song song = new Song("Test", "TestArtist", 2019, 560);
    	Song song2 = new Song("ATest2", "ATestArtist2", 2018, 570);
    	list.add(song);
    	list.add(song2);
    	sortedList.add(song);
    	sortedList.add(song2);
    	list.sortByYearNewtoOld();
    	assertEquals(sortedList.toString(),list.toString());
    }
    @Test
    public void testSortByLength() {
    	Playlist list = new Playlist();
    	Playlist sortedList = new Playlist();
    	Song song = new Song("Test", "TestArtist", 2019, 560);
    	Song song2 = new Song("ATest2", "ATestArtist2", 2018, 570);
    	list.add(song2);
    	list.add(song);
    	sortedList.add(song);
    	sortedList.add(song2);
    	list.sortByLength();
    	assertEquals(sortedList.toString(),list.toString());
    }
    @Test
    public void testPlaylistIsValidByLength() {
    	Playlist list = new Playlist();
    	Song LongSong = new Song("A","B",2019, 4000);
    	list.add(LongSong);
    	assertEquals(true, list.getPlaylistLength());
    }
}