test: cover audio, sequences, pattern direction, and settings

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_beat_detect_ioi.py

@@ -0,0 +1,28 @@
+"""Beat interval plausibility helpers (audio detector)."""
+
+import os
+import sys
+from collections import deque
+
+PROJECT_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if PROJECT_ROOT not in sys.path:
+    sys.path.insert(0, PROJECT_ROOT)
+
+from tests.beat_detect import _is_plausible_ioi, _resolve_bpm  # noqa: E402
+
+
+def test_is_plausible_ioi_rejects_double_time():
+    times = deque([0.0, 0.5, 1.0])
+    assert _is_plausible_ioi(1.0, times, 1.15) is False
+
+
+def test_is_plausible_ioi_accepts_steady_grid():
+    times = deque([0.0, 0.5, 1.0])
+    assert _is_plausible_ioi(1.0, times, 1.5) is True
+
+
+def test_resolve_bpm_prefers_intervals_over_wrong_aubio():
+    times = deque([0.0, 0.5, 1.0, 1.5, 2.0])
+    bpm = _resolve_bpm(times, 70.0)
+    assert bpm is not None
+    assert abs(bpm - 120.0) < 5.0