feat(playevents): post-commit MaybeEnqueue in RecordPlayEnded + Synthetic

internal/playevents/writer_test.go

@@ -34,7 +34,7 @@ func testPool(t *testing.T) *pgxpool.Pool {
 	}
 	t.Cleanup(pool.Close)
 	if _, err := pool.Exec(context.Background(),
-		"TRUNCATE play_events, skip_events, play_sessions, sessions, users, tracks, albums, artists RESTART IDENTITY CASCADE"); err != nil {
+		"TRUNCATE scrobble_queue, play_events, skip_events, play_sessions, sessions, users, tracks, albums, artists RESTART IDENTITY CASCADE"); err != nil {
 		t.Fatalf("truncate: %v", err)
 	}
 	return pool
@@ -317,3 +317,60 @@ func TestRecordPlayStarted_VectorScopedToSession(t *testing.T) {
 		t.Errorf("recent_track_ids has %d entries from prior session, want 0", len(recentIDs))
 	}
 }
+
+func TestRecordPlayEnded_QualifyingPlay_EnqueuesScrobble(t *testing.T) {
+	f := newFixture(t, 300_000) // 300s track
+	ctx := context.Background()
+
+	// Enable LB for the user.
+	tk := "tk"
+	if err := f.q.SetListenBrainzToken(ctx, dbq.SetListenBrainzTokenParams{ID: f.user, ListenbrainzToken: &tk}); err != nil {
+		t.Fatalf("token: %v", err)
+	}
+	if err := f.q.SetListenBrainzEnabled(ctx, dbq.SetListenBrainzEnabledParams{ID: f.user, ListenbrainzEnabled: true}); err != nil {
+		t.Fatalf("enable: %v", err)
+	}
+
+	res, err := f.w.RecordPlayStarted(ctx, f.user, f.track, "test", time.Now().Add(-1*time.Minute))
+	if err != nil {
+		t.Fatalf("start: %v", err)
+	}
+	// 250s played out of 300s = ~83% — well above LB threshold.
+	if err := f.w.RecordPlayEnded(ctx, res.PlayEventID, 250_000, time.Now()); err != nil {
+		t.Fatalf("end: %v", err)
+	}
+
+	var n int
+	if err := f.pool.QueryRow(ctx,
+		`SELECT count(*) FROM scrobble_queue WHERE play_event_id = $1`, res.PlayEventID).Scan(&n); err != nil {
+		t.Fatalf("count: %v", err)
+	}
+	if n != 1 {
+		t.Errorf("scrobble_queue rows = %d, want 1", n)
+	}
+}
+
+func TestRecordPlayEnded_SubThreshold_NoEnqueue(t *testing.T) {
+	f := newFixture(t, 300_000)
+	ctx := context.Background()
+
+	tk := "tk"
+	_ = f.q.SetListenBrainzToken(ctx, dbq.SetListenBrainzTokenParams{ID: f.user, ListenbrainzToken: &tk})
+	_ = f.q.SetListenBrainzEnabled(ctx, dbq.SetListenBrainzEnabledParams{ID: f.user, ListenbrainzEnabled: true})
+
+	res, err := f.w.RecordPlayStarted(ctx, f.user, f.track, "test", time.Now().Add(-1*time.Minute))
+	if err != nil {
+		t.Fatalf("start: %v", err)
+	}
+	// 60s played, 20% — well below threshold.
+	if err := f.w.RecordPlayEnded(ctx, res.PlayEventID, 60_000, time.Now()); err != nil {
+		t.Fatalf("end: %v", err)
+	}
+
+	var n int
+	_ = f.pool.QueryRow(ctx,
+		`SELECT count(*) FROM scrobble_queue WHERE play_event_id = $1`, res.PlayEventID).Scan(&n)
+	if n != 0 {
+		t.Errorf("expected 0 queue rows for sub-threshold play, got %d", n)
+	}
+}