test(voice): pin little-endian PCM16 decoding

Author: harshitethic

tests/voice/test_pcm16_endianness.py

@@ -0,0 +1,27 @@
+import numpy as np
+
+from agents.voice.result import StreamedAudioResult
+
+
+def test_transform_audio_buffer_decodes_pcm16_as_little_endian() -> None:
+    result = StreamedAudioResult.__new__(StreamedAudioResult)
+
+    raw = b"\x01\x02\x03\x04"
+    transformed = result._transform_audio_buffer([raw], np.int16)
+
+    assert transformed.dtype == np.dtype(np.int16)
+    assert transformed.tolist() == [0x0201, 0x0403]
+
+
+def test_transform_audio_buffer_float32_uses_little_endian_samples() -> None:
+    result = StreamedAudioResult.__new__(StreamedAudioResult)
+
+    raw = b"\x01\x02\x03\x04"
+    transformed = result._transform_audio_buffer([raw], np.float32)
+
+    assert transformed.dtype == np.dtype(np.float32)
+    assert transformed.shape == (2, 1)
+    np.testing.assert_allclose(
+        transformed[:, 0],
+        np.asarray([0x0201, 0x0403], dtype=np.float32) / 32767.0,
+    )