chore: 后端 agent 和 users 模块代码更新优化

backend/tests/integration/v1/agent/test_routes.py

@@ -354,17 +354,19 @@ def test_asr_transcribe_returns_sync_transcript(monkeypatch) -> None:
         id=uuid4(), email="user@example.com"
     )
 
-    async def mock_transcribe(audio_data: bytes, filename: str) -> str:
+    async def mock_transcribe_file(file_path: str, filename: str) -> str:
+        assert file_path.endswith(".wav")
+        assert filename == "test.wav"
         return "这是测试转写结果"
 
     monkeypatch.setattr(
-        "v1.agent.service.asr_service.transcribe",
-        mock_transcribe,
+        "v1.agent.service.asr_service.transcribe_file",
+        mock_transcribe_file,
     )
 
     client = TestClient(app)
 
-    wav_content = b"fake-wav-file-content"
+    wav_content = b"RIFF\x24\x80\x00\x00WAVEfmt "
     wav_file = BytesIO(wav_content)
     wav_file.name = "test.wav"
 
@@ -380,3 +382,68 @@ def test_asr_transcribe_returns_sync_transcript(monkeypatch) -> None:
         assert data["transcript"] == "这是测试转写结果"
     finally:
         app.dependency_overrides = {}
+
+
+def test_asr_transcribe_rejects_oversized_audio(monkeypatch) -> None:
+    app.dependency_overrides[get_current_user] = lambda: CurrentUser(
+        id=uuid4(), email="user@example.com"
+    )
+
+    monkeypatch.setattr(agent_router, "_MAX_TRANSCRIBE_AUDIO_BYTES", 4)
+
+    client = TestClient(app)
+    oversized = BytesIO(b"12345")
+    oversized.name = "test.wav"
+
+    try:
+        response = client.post(
+            "/api/v1/agent/transcribe",
+            files={"audio": ("test.wav", oversized, "audio/wav")},
+        )
+
+        assert response.status_code == 400
+        assert response.json()["detail"] == "Audio file too large"
+    finally:
+        app.dependency_overrides = {}
+
+
+def test_asr_transcribe_rejects_non_wav_audio() -> None:
+    app.dependency_overrides[get_current_user] = lambda: CurrentUser(
+        id=uuid4(), email="user@example.com"
+    )
+
+    client = TestClient(app)
+    fake_mp3 = BytesIO(b"fake-mp3")
+    fake_mp3.name = "test.mp3"
+
+    try:
+        response = client.post(
+            "/api/v1/agent/transcribe",
+            files={"audio": ("test.mp3", fake_mp3, "audio/mpeg")},
+        )
+
+        assert response.status_code == 400
+        assert response.json()["detail"] == "Unsupported audio format"
+    finally:
+        app.dependency_overrides = {}
+
+
+def test_asr_transcribe_rejects_invalid_wav_payload() -> None:
+    app.dependency_overrides[get_current_user] = lambda: CurrentUser(
+        id=uuid4(), email="user@example.com"
+    )
+
+    client = TestClient(app)
+    fake_payload = BytesIO(b"not-a-wav")
+    fake_payload.name = "test.wav"
+
+    try:
+        response = client.post(
+            "/api/v1/agent/transcribe",
+            files={"audio": ("test.wav", fake_payload, "audio/wav")},
+        )
+
+        assert response.status_code == 400
+        assert response.json()["detail"] == "Unsupported audio format"
+    finally:
+        app.dependency_overrides = {}