ai-agent-book 精选快照（<2MB 代码与文档，来自 github.com/bojieli/ai-agent-book）

chapter6/phone-agent/test_speech.py

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+import struct
+
+from speech import pcm16_wav, read_pcm16_wav, sha256_bytes
+
+
+def test_pcm_wav_round_trip_is_exact():
+    pcm = b"".join(struct.pack("<h", sample) for sample in (0, 100, -100, 32767, -32768))
+    wav = pcm16_wav(pcm, 16_000)
+    decoded, rate = read_pcm16_wav(wav)
+    assert decoded == pcm
+    assert rate == 16_000
+    assert len(sha256_bytes(wav)) == 64
+
+
+def test_speech_source_has_no_mock_or_tone_fallback():
+    source = __import__("pathlib").Path(__file__).with_name("speech.py").read_text()
+    assert "SystemSpeechSynthesizer" in source
+    assert "WhisperASR" in source
+    assert 'fallback_used": False' in source
+    assert "440" not in source