Add unit tests for Wave

tests/test_wave.py

@@ -0,0 +1,27 @@
+import numpy as np
+
+import pytest
+
+from ovgenpy.wave import Wave
+
+
+prefix = 'tests/wav-formats/'
+wave_paths = [
+    # 2000 samples, with a full-scale peak at data[1000].
+    'u8-impulse1000.wav',
+    's16-impulse1000.wav',
+    's32-impulse1000.wav',
+    'f32-impulse1000.wav',
+    'f64-impulse1000.wav',
+]
+
+
+@pytest.mark.parametrize("wave_path", wave_paths)
+def test_wave(wave_path):
+    wave = Wave(None, prefix + wave_path)
+    data = wave[:]
+
+    # Audacity dithers <=16-bit WAV files upon export, creating a few bits of noise.
+    # As a result, amin(data) <= 0.
+    assert -0.01 < np.amin(data) <= 0
+    assert 0.99 < np.amax(data) <= 1