import pytest

from fixtures import soloTool as uut, mockPlayer, testSongs

def test_perSongVolumeFlow(uut, mockPlayer, testSongs):
    # Before a song is added, the volume starts at 100%
    assert uut.song is None
    assert mockPlayer.currentSong == None
    assert uut.volume == 1.0
    assert mockPlayer.volume == 1.0

    # When songs are added, their volume starts at 100%
    uut.addSong(testSongs[0])
    assert uut.song == 0
    assert uut.volume == 1.0
    assert mockPlayer.volume == 1.0

    # It's possible to change the volume
    uut.volume = 0.5
    assert uut.volume == 0.5
    assert mockPlayer.volume == 0.5

    # New song song is added, volume stays because the new song is not selected
    uut.addSong(testSongs[1])
    assert uut.song == 0
    assert uut.volume == 0.5
    assert mockPlayer.volume == 0.5

    # Select new song, volume is 100%
    uut.song = 1
    assert uut.volume == 1.0
    assert mockPlayer.volume == 1.0

    uut.volume = 0.75

    # Previous song retains its volume
    uut.song = 0
    assert uut.volume == 0.5
    assert mockPlayer.volume == 0.5

    # New song also
    uut.song = 1
    assert uut.volume == 0.75
    assert mockPlayer.volume == 0.75

def test_perSongVolumeEdgeCases(uut, mockPlayer, testSongs):
    # If the player volume is not 100% when the first song is added, it is set to 100%
    uut.volume = 0.5
    assert mockPlayer.volume == 0.5

    uut.addSong(testSongs[0])
    assert uut.volume == 1.0
    assert mockPlayer.volume == 1.0