1 files changed, 44 insertions, 0 deletions
diff --git a/lib/tests/test_meters.py b/lib/tests/test_meters.py
new file mode 100644
index 0000000..73f3db6
--- /dev/null
+++ b/lib/tests/test_meters.py
@@ -0,0 +1,44 @@
+import numpy as np
+from conftest import sine, speechish
+
+from producer import meters
+
+
+def test_rms_and_peak_of_sine(sr):
+    x = sine(1000, 3.0, sr, peak_dbfs=-17.0)
+    assert abs(meters.rms_db(x) + 20.0) < 0.1
+    assert abs(meters.sample_peak_db(x) + 17.0) < 0.05
+
+
+def test_true_peak_bounds(sr):
+    x = sine(1000, 3.0, sr, peak_dbfs=-17.0)
+    tp = meters.true_peak_db(x, sr)
+    sp = meters.sample_peak_db(x)
+    assert sp - 0.01 <= tp <= sp + 0.6
+
+
+def test_lufs_of_sine(sr):
+    x = sine(1000, 3.0, sr, peak_dbfs=-17.0)
+    assert abs(meters.lufs(x, sr) + 20.05) < 0.2
+
+
+def test_lufs_silence():
+    assert meters.lufs(np.zeros(48000, dtype=np.float32), 48000) == meters.SILENCE_DB
+
+
+def test_noise_floor_below_speech(sr):
+    x = speechish(8.0, sr, level_dbfs=-20.0)
+    floor = meters.noise_floor_db(x, sr)
+    assert floor < meters.rms_db(x) - 4.0
+
+
+def test_all_meters_keys(sr):
+    d = meters.all_meters(speechish(3.0, sr), sr)
+    assert set(d) == {
+        "rms_db",
+        "sample_peak_db",
+        "true_peak_db",
+        "lufs",
+        "noise_floor_db",
+        "duration_s",
+    }