feat(jukebox): use mpv over ipc as a player backend

jukebox/jukebox_test.go

@@ -0,0 +1,187 @@
+package jukebox_test
+
+import (
+	"os"
+	"path/filepath"
+	"sort"
+	"testing"
+
+	"github.com/matryer/is"
+	"go.senan.xyz/gonic/jukebox"
+)
+
+func newJukebox(t *testing.T) *jukebox.Jukebox {
+	sockPath := filepath.Join(t.TempDir(), "mpv.sock")
+
+	j := jukebox.New()
+	err := j.Start(
+		sockPath,
+		[]string{jukebox.MPVArg("--ao", "null")},
+	)
+	if err != nil {
+		t.Fatalf("start jukebox: %v", err)
+	}
+	t.Cleanup(func() {
+		j.Quit()
+	})
+	return j
+}
+
+func TestPlaySkipReset(t *testing.T) {
+	t.Parallel()
+	j := newJukebox(t)
+	is := is.New(t)
+
+	is.NoErr(j.SetPlaylist([]string{
+		testPath("tr_0.mp3"),
+		testPath("tr_1.mp3"),
+		testPath("tr_2.mp3"),
+		testPath("tr_3.mp3"),
+		testPath("tr_4.mp3"),
+	}))
+
+	status, err := j.GetStatus()
+	is.NoErr(err)
+	is.Equal(status.CurrentIndex, 0)
+	is.Equal(status.CurrentFilename, testPath("tr_0.mp3"))
+	is.Equal(status.Length, 5)
+	is.Equal(status.Playing, true)
+
+	items, err := j.GetPlaylist()
+	is.NoErr(err)
+
+	itemsSorted := append([]string(nil), items...)
+	sort.Strings(itemsSorted)
+	is.Equal(items, itemsSorted)
+
+	is.NoErr(j.Play())
+
+	status, err = j.GetStatus()
+	is.NoErr(err)
+	is.Equal(status.Playing, true)
+
+	is.NoErr(j.Pause())
+
+	status, err = j.GetStatus()
+	is.NoErr(err)
+	is.Equal(status.Playing, false)
+
+	is.NoErr(j.Play())
+
+	// skip to 2
+	is.NoErr(j.SkipToPlaylistIndex(2, 0))
+
+	status, err = j.GetStatus()
+	is.NoErr(err)
+	is.Equal(status.CurrentIndex, 2)
+	is.Equal(status.CurrentFilename, testPath("tr_2.mp3"))
+	is.Equal(status.Length, 5)
+	is.Equal(status.Playing, true)
+
+	// skip to 3
+	is.NoErr(j.SkipToPlaylistIndex(3, 0))
+
+	status, err = j.GetStatus()
+	is.NoErr(err)
+	is.Equal(status.CurrentIndex, 3)
+	is.Equal(status.CurrentFilename, testPath("tr_3.mp3"))
+	is.Equal(status.Length, 5)
+	is.Equal(status.Playing, true)
+
+	// just add one more by overwriting the playlist like some clients do
+	// we should keep the current track unchaned if we find it
+	is.NoErr(j.SetPlaylist([]string{
+		"testdata/tr_0.mp3",
+		"testdata/tr_1.mp3",
+		"testdata/tr_2.mp3",
+		"testdata/tr_3.mp3",
+		"testdata/tr_4.mp3",
+		"testdata/tr_5.mp3",
+	}))
+
+	status, err = j.GetStatus()
+	is.NoErr(err)
+	is.Equal(status.CurrentIndex, 3) // index unchanged
+	is.Equal(status.CurrentFilename, testPath("tr_3.mp3"))
+	is.Equal(status.Length, 6) // we added one more track
+	is.Equal(status.Playing, true)
+
+	// skip to 3 again
+	is.NoErr(j.SkipToPlaylistIndex(3, 0))
+
+	status, err = j.GetStatus()
+	is.NoErr(err)
+	is.Equal(status.CurrentIndex, 3)
+	is.Equal(status.CurrentFilename, testPath("tr_3.mp3"))
+	is.Equal(status.Length, 6)
+	is.Equal(status.Playing, true)
+
+	// remove all but 3
+	is.NoErr(j.SetPlaylist([]string{
+		"testdata/tr_0.mp3",
+		"testdata/tr_1.mp3",
+		"testdata/tr_2.mp3",
+		"testdata/tr_3.mp3",
+	}))
+
+	status, err = j.GetStatus()
+	is.NoErr(err)
+	is.Equal(status.CurrentIndex, 3) // index unchanged
+	is.Equal(status.CurrentFilename, testPath("tr_3.mp3"))
+	is.Equal(status.Length, 4)
+	is.Equal(status.Playing, true)
+
+	// skip to 2 (5s long) in the middle of the track
+	is.NoErr(j.SkipToPlaylistIndex(2, 2))
+
+	status, err = j.GetStatus()
+	is.NoErr(err)
+	is.Equal(status.CurrentIndex, 2) // index unchanged
+	is.Equal(status.CurrentFilename, testPath("tr_2.mp3"))
+	is.Equal(status.Length, 4)
+	is.Equal(status.Playing, true)
+	is.Equal(status.Position, 2) // at new position
+
+	// overwrite completely
+	is.NoErr(j.SetPlaylist([]string{
+		"testdata/tr_5.mp3",
+		"testdata/tr_6.mp3",
+		"testdata/tr_7.mp3",
+		"testdata/tr_8.mp3",
+		"testdata/tr_9.mp3",
+	}))
+
+	status, err = j.GetStatus()
+	is.NoErr(err)
+	is.Equal(status.CurrentIndex, 0) // index unchanged
+	is.Equal(status.CurrentFilename, testPath("tr_5.mp3"))
+	is.Equal(status.Length, 5)
+	is.Equal(status.Playing, true)
+}
+
+func TestVolume(t *testing.T) {
+	t.Parallel()
+	j := newJukebox(t)
+	is := is.New(t)
+
+	vol, err := j.GetVolumePct()
+	is.NoErr(err)
+	is.Equal(vol, 100.0)
+
+	is.NoErr(j.SetVolumePct(69.0))
+
+	vol, err = j.GetVolumePct()
+	is.NoErr(err)
+	is.Equal(vol, 69.0)
+
+	is.NoErr(j.SetVolumePct(0.0))
+
+	vol, err = j.GetVolumePct()
+	is.NoErr(err)
+	is.Equal(vol, 0.0)
+}
+
+func testPath(path string) string {
+	cwd, _ := os.Getwd()
+	return filepath.Join(cwd, "testdata", path)
+}