366 lines
10 KiB
Python
366 lines
10 KiB
Python
"""Tests for the shared player behaviour, exercised through FakePlayer.
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VlcPlayer adds only the libVLC bindings on top of PlayerBase; it needs a real audio
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device and is covered by the on-device checklist, not here - except for how it works
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out which track is playing, which is stubbed out at the bottom of this file because
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getting it wrong is invisible until a front-end displays it.
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"""
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from __future__ import annotations
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from collections.abc import AsyncIterator
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from pathlib import Path
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import pytest
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from musicmouse.bus import EventBus
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from musicmouse.clock import FakeClock
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from musicmouse.devices.player import Player, PlayerBase, VlcPlayer
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from musicmouse.events import (
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Event,
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PlaybackChanged,
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PlaylistFinished,
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TrackChanged,
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VolumeChanged,
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)
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from musicmouse.media import Playlist, Track
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from musicmouse.simulator.fake_player import FakePlayer
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def playlist(name: str = "fuchs", count: int = 3) -> Playlist:
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tracks = tuple(Track(Path(f"/music/{name}/{i}.mp3")) for i in range(count))
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return Playlist(name=name, tracks=tracks)
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@pytest.fixture
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async def bus() -> AsyncIterator[EventBus]:
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async with EventBus() as running:
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yield running
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@pytest.fixture
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def clock(bus: EventBus) -> FakeClock:
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return FakeClock(idle=bus.drain)
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@pytest.fixture
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def player(bus: EventBus, clock: FakeClock) -> FakePlayer:
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return FakePlayer(bus, clock=clock, track_duration=10.0, initial_volume=50)
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@pytest.fixture
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def seen(bus: EventBus) -> list[Event]:
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events: list[Event] = []
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bus.subscribe_all(events.append)
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return events
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def only[T: Event](events: list[Event], event_type: type[T]) -> list[T]:
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return [e for e in events if isinstance(e, event_type)]
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# ------------------------------------------------------------------------ volume
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async def test_volume_starts_at_the_configured_value(player: FakePlayer) -> None:
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assert player.volume == 50
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async def test_setting_volume_announces_it(
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bus: EventBus, player: FakePlayer, seen: list[Event]
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) -> None:
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player.set_volume(30, source="mqtt")
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await bus.drain()
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assert player.volume == 30
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assert only(seen, VolumeChanged) == [VolumeChanged(volume=30, source="mqtt")]
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async def test_setting_the_same_volume_is_not_announced(
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bus: EventBus, player: FakePlayer, seen: list[Event]
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) -> None:
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player.set_volume(50)
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await bus.drain()
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assert only(seen, VolumeChanged) == []
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async def test_change_volume_is_relative(bus: EventBus, player: FakePlayer) -> None:
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player.change_volume(-20)
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await bus.drain()
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assert player.volume == 30
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async def test_volume_is_clamped_to_the_configured_range(bus: EventBus) -> None:
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limited = FakePlayer(bus, min_volume=20, max_volume=60, initial_volume=40)
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limited.set_volume(100)
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assert limited.volume == 60
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limited.set_volume(0)
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assert limited.volume == 20
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async def test_min_volume_of_zero_is_honoured(bus: EventBus) -> None:
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"""Regression: `if self.volume_min and ...` treated a configured 0 as unset."""
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limited = FakePlayer(bus, min_volume=0, max_volume=100, initial_volume=10)
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limited.set_volume(-5)
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assert limited.volume == 0
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# --------------------------------------------------------------------- playback
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async def test_play_from_start_starts_the_first_track(
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bus: EventBus, player: FakePlayer, seen: list[Event]
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) -> None:
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player.set_playlist(playlist())
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player.play_from_start()
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await bus.drain()
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assert player.is_playing
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assert player.track_index == 0
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assert player.current_track is not None
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assert player.current_track.title == "0"
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assert only(seen, PlaybackChanged)[-1].playing is True
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async def test_playing_an_empty_playlist_does_nothing(
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bus: EventBus, player: FakePlayer, caplog: pytest.LogCaptureFixture
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) -> None:
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player.set_playlist(Playlist(name="leer", tracks=()))
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player.play_from_start()
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await bus.drain()
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assert not player.is_playing
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assert "playlist is empty" in caplog.text
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async def test_pause_and_resume(bus: EventBus, player: FakePlayer) -> None:
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player.set_playlist(playlist())
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player.play_from_start()
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player.pause()
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await bus.drain()
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assert not player.is_playing
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player.play()
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await bus.drain()
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assert player.is_playing
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async def test_tracks_advance_as_time_passes(
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bus: EventBus, player: FakePlayer, clock: FakeClock, seen: list[Event]
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) -> None:
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player.set_playlist(playlist(count=3))
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player.play_from_start()
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await bus.drain()
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await clock.advance(10.0)
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assert player.track_index == 1
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await clock.advance(10.0)
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assert player.track_index == 2
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assert [e.index for e in only(seen, TrackChanged)] == [1, 2]
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async def test_playlist_end_stops_playback_and_is_announced(
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bus: EventBus, player: FakePlayer, clock: FakeClock, seen: list[Event]
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) -> None:
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player.set_playlist(playlist(count=2))
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player.play_from_start()
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await clock.advance(25.0)
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assert only(seen, PlaylistFinished) == [PlaylistFinished(source="player")]
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assert not player.is_playing
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async def test_a_paused_player_does_not_advance(
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bus: EventBus, player: FakePlayer, clock: FakeClock
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) -> None:
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player.set_playlist(playlist())
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player.play_from_start()
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await bus.drain()
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player.pause()
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await clock.advance(100.0)
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assert player.track_index == 0
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assert not player.is_playing
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async def test_resuming_continues_the_remainder_of_the_track(
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bus: EventBus, player: FakePlayer, clock: FakeClock
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) -> None:
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player.set_playlist(playlist())
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player.play_from_start()
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await clock.advance(7.0)
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player.pause()
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await clock.advance(100.0)
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player.play()
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await clock.advance(2.0)
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assert player.track_index == 0 # 3s of the track were still left
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await clock.advance(2.0)
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assert player.track_index == 1
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async def test_next_and_previous(bus: EventBus, player: FakePlayer) -> None:
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player.set_playlist(playlist(count=3))
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player.play_from_start()
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await bus.drain()
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player.next_track()
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player.next_track()
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await bus.drain()
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assert player.track_index == 2
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player.previous_track()
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await bus.drain()
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assert player.track_index == 1
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async def test_previous_on_the_first_track_stays_there(bus: EventBus, player: FakePlayer) -> None:
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player.set_playlist(playlist())
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player.play_from_start()
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player.previous_track()
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await bus.drain()
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assert player.track_index == 0
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async def test_next_past_the_last_track_ends_the_playlist(
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bus: EventBus, player: FakePlayer, seen: list[Event]
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) -> None:
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player.set_playlist(playlist(count=2))
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player.play_from_start()
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player.next_track()
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player.next_track()
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await bus.drain()
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assert only(seen, PlaylistFinished) == [PlaylistFinished(source="player")]
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assert not player.is_playing
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async def test_skipping_restarts_the_track_timer(
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bus: EventBus, player: FakePlayer, clock: FakeClock
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) -> None:
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player.set_playlist(playlist(count=3))
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player.play_from_start()
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await clock.advance(9.0)
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player.next_track()
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await bus.drain()
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await clock.advance(9.0)
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assert player.track_index == 1 # a fresh 10s, not the 1s left over
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await clock.advance(2.0)
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assert player.track_index == 2
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async def test_stop_resets_playback(bus: EventBus, player: FakePlayer, clock: FakeClock) -> None:
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player.set_playlist(playlist())
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player.play_from_start()
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player.stop()
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await bus.drain()
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assert not player.is_playing
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await clock.advance(100.0)
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assert player.track_index == 0
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async def test_setting_a_new_playlist_resets_the_index(bus: EventBus, player: FakePlayer) -> None:
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player.set_playlist(playlist(count=3))
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player.play_from_start()
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player.next_track()
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await bus.drain()
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player.set_playlist(playlist(name="eule", count=2))
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assert player.track_index == 0
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assert player.playlist is not None
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assert player.playlist.name == "eule"
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async def test_current_track_is_none_without_a_playlist(player: FakePlayer) -> None:
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assert player.current_track is None
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assert player.playlist is None
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def test_fake_player_satisfies_the_player_protocol(player: FakePlayer) -> None:
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check: Player = player
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assert check.volume == player.volume
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def _vlc_player_satisfies_the_player_protocol(real: VlcPlayer) -> Player:
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"""Checked by mypy, not at runtime: VlcPlayer needs libVLC to instantiate."""
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return real
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# --------------------------------------------------------- track index without libVLC
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class _FakeMedia:
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def __init__(self, mrl: str) -> None:
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self._mrl = mrl
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def get_mrl(self) -> str:
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return self._mrl
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class _FakeMediaPlayer:
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"""Just enough of libVLC's media player to exercise index syncing."""
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def __init__(self) -> None:
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self.media: _FakeMedia | None = None
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def get_media(self) -> _FakeMedia | None:
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return self.media
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def _vlc_like(bus: EventBus, playlist: Playlist) -> VlcPlayer:
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"""A VlcPlayer with its libVLC parts stubbed out, without calling __init__."""
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player = object.__new__(VlcPlayer)
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PlayerBase.__init__(player, bus)
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player._media_player = _FakeMediaPlayer() # type: ignore[assignment]
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player._playlist = playlist
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player._mrl_to_index = {f"file://{track.path}": i for i, track in enumerate(playlist.tracks)}
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return player
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async def test_the_track_index_is_read_back_off_the_player(bus: EventBus) -> None:
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"""Not taken from the event payload.
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``MediaListPlayerNextItemSet`` carries a bare int rather than a Media on some
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libVLC builds, and trusting it left the index pinned at zero: the UI showed track 1
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of an album that was audibly on track 3.
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"""
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playlist = Playlist("test", tuple(Track(Path(f"/music/{i}.mp3")) for i in range(3)))
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player = _vlc_like(bus, playlist)
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events: list[Event] = []
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bus.subscribe(TrackChanged, events.append)
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player._media_player.media = _FakeMedia("file:///music/2.mp3") # type: ignore[attr-defined]
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player._on_next_item(object())
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await bus.drain()
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assert player.track_index == 2
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assert player.current_track is not None
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assert player.current_track.path.name == "2.mp3"
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assert len(events) == 1
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async def test_an_unknown_media_leaves_the_index_alone(bus: EventBus) -> None:
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playlist = Playlist("test", tuple(Track(Path(f"/music/{i}.mp3")) for i in range(3)))
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player = _vlc_like(bus, playlist)
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player._media_player.media = None # type: ignore[attr-defined]
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player._on_next_item(object())
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player._media_player.media = _FakeMedia("file:///elsewhere/x.mp3") # type: ignore[attr-defined]
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player._on_next_item(object())
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await bus.drain()
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assert player.track_index == 0
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