test: integration tests için audio processing conversion ve organization uç noktaları eklendi

tests/test_data_processing.py

@@ -117,6 +117,71 @@ def test_audio_defaults_when_options_missing(client: TestClient) -> None:
     assert response.status_code != 422
 
 
+def _real_tone_wav(freq: float = 440.0, duration: float = 1.0, sr: int = 22050) -> io.BytesIO:
+    """A real sine wave WAV — librosa/soundfile reject an all-zero buffer
+    as silence, so mix-audio tests need genuine audio content."""
+    import numpy as np
+    import soundfile as sf
+
+    t = np.linspace(0, duration, int(sr * duration))
+    y = (0.3 * np.sin(2 * np.pi * freq * t)).astype(np.float32)
+    buf = io.BytesIO()
+    sf.write(buf, y, sr, format="WAV")
+    buf.seek(0)
+    return buf
+
+
+def test_audio_mix_requires_second_file_when_enabled(client: TestClient) -> None:
+    """mixAudio: true without a mix_file must 400, not silently ignore it."""
+    response = client.post(
+        "/api/process/audio",
+        data={"options": _valid_options(mixAudio=True)},
+        files={"file": ("a.wav", _real_tone_wav(440), "audio/wav")},
+    )
+    assert response.status_code == 400
+    detail = response.json()["detail"]
+    assert detail["code"] == "missing_mix_file"
+
+
+def test_audio_mix_rejects_non_audio_second_file(client: TestClient) -> None:
+    response = client.post(
+        "/api/process/audio",
+        data={"options": _valid_options(mixAudio=True)},
+        files={
+            "file": ("a.wav", _real_tone_wav(440), "audio/wav"),
+            "mix_file": ("b.txt", io.BytesIO(b"not audio"), "text/plain"),
+        },
+    )
+    assert response.status_code == 400
+    detail = response.json()["detail"]
+    assert detail["code"] == "invalid_file_type"
+
+
+def test_audio_mix_succeeds_and_blends_both_tracks(client: TestClient) -> None:
+    """End-to-end: two distinct real tones, mixAudio on, verify the output
+    actually contains spectral energy from BOTH sources."""
+    import numpy as np
+    import librosa
+
+    response = client.post(
+        "/api/process/audio",
+        data={"options": _valid_options(mixAudio=True)},
+        files={
+            "file": ("a.wav", _real_tone_wav(440), "audio/wav"),
+            "mix_file": ("b.wav", _real_tone_wav(880), "audio/wav"),
+        },
+    )
+    assert response.status_code == 200
+
+    y, sr = librosa.load(io.BytesIO(response.content), sr=22050)
+    fft = np.abs(np.fft.rfft(y))
+    freqs = np.fft.rfftfreq(len(y), 1 / sr)
+    energy_440 = fft[(freqs > 430) & (freqs < 450)].max()
+    energy_880 = fft[(freqs > 870) & (freqs < 890)].max()
+    assert energy_440 > 5
+    assert energy_880 > 5
+
+
 def test_audio_rejects_oversized_file_with_413_not_500(client: TestClient) -> None:
     """Regression test: the 413 raised inside the read loop's try block was
     being caught by the bare `except Exception` below it (HTTPException IS