playlist GUI

cmd/mxl-player/playlist_runtime_test.go

@@ -298,6 +298,79 @@ func TestShouldAutoStartPlaylist(t *testing.T) {
 	}
 }
 
+func TestPlaylistEntryDisplayName(t *testing.T) {
+	tests := []struct {
+		entry playback.PlaylistEntry
+		index int
+		want  string
+	}{
+		{entry: playback.PlaylistEntry{Name: "News"}, index: 0, want: "News"},
+		{entry: playback.PlaylistEntry{}, index: 0, want: "Entry 1"},
+		{entry: playback.PlaylistEntry{}, index: 4, want: "Entry 5"},
+	}
+	for _, test := range tests {
+		if got := playlistEntryDisplayName(test.entry, test.index); got != test.want {
+			t.Fatalf("playlistEntryDisplayName() = %q, want %q", got, test.want)
+		}
+	}
+}
+
+func TestPlaylistTimingProgress(t *testing.T) {
+	now := time.Date(2026, time.September, 1, 12, 0, 0, 0, time.UTC)
+	tests := []struct {
+		name          string
+		timing        playback.PlaylistTimingState
+		wantFraction  float32
+		wantRemaining time.Duration
+	}{
+		{name: "manual"},
+		{
+			name:          "waiting",
+			timing:        playback.PlaylistTimingState{Duration: 10 * time.Second},
+			wantRemaining: 10 * time.Second,
+		},
+		{
+			name: "half complete",
+			timing: playback.PlaylistTimingState{
+				Duration: 10 * time.Second,
+				Started:  true,
+				Deadline: now.Add(5 * time.Second),
+			},
+			wantFraction:  0.5,
+			wantRemaining: 5 * time.Second,
+		},
+		{
+			name:         "expired",
+			timing:       playback.PlaylistTimingState{Duration: 10 * time.Second, Expired: true},
+			wantFraction: 1,
+		},
+		{
+			name: "deadline passed",
+			timing: playback.PlaylistTimingState{
+				Duration: 10 * time.Second,
+				Started:  true,
+				Deadline: now.Add(-time.Second),
+			},
+			wantFraction: 1,
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			fraction, remaining := playlistTimingProgress(test.timing, now)
+			if fraction != test.wantFraction || remaining != test.wantRemaining {
+				t.Fatalf(
+					"playlistTimingProgress() = %v, %v; want %v, %v",
+					fraction,
+					remaining,
+					test.wantFraction,
+					test.wantRemaining,
+				)
+			}
+		})
+	}
+}
+
 func newPlaylistTestPlayer(t *testing.T) *playerPlayback {
 	t.Helper()
 	return &playerPlayback{