style: auto-format with black + isort + ruff + prettier [skip ci-format-check]

tests/unit/test_gpu_encoder.py

@@ -1,4 +1,5 @@
 """GpuEncoderClient 单元测试：mock HTTP，覆盖 health/sync/fallback/singleton 等完整路径。"""
+
 from __future__ import annotations
 
 import json
@@ -62,8 +63,12 @@ def _fake_response(status: int = 200, body: dict | bytes | None = None, headers=
 # ── Health check ────────────────────────────────────────────────────
 class TestHealthCheck:
     def test_healthy_nvenc_available(self, client):
-        body = {"status": "healthy", "worker": "w1",
-                "gpu": {"name": "Quadro P4000"}, "nvenc": {"h264_nvenc": True, "hevc_nvenc": True}}
+        body = {
+            "status": "healthy",
+            "worker": "w1",
+            "gpu": {"name": "Quadro P4000"},
+            "nvenc": {"h264_nvenc": True, "hevc_nvenc": True},
+        }
         with mock.patch("urllib.request.urlopen", return_value=_fake_response(body=body)):
             h = client.check_health()
         assert h.healthy and h.nvenc_h264 and h.ready
@@ -98,55 +103,73 @@ class TestHealthCheck:
 # ── _post_sync ──────────────────────────────────────────────────────
 class TestPostSync:
     def test_completed_job_returns_dict(self, client):
-        result_body = {"job_id":"j1","status":"completed","ffmpeg_rc":0,"uploaded":True,"duration":5.1,"size":123456}
+        result_body = {
+            "job_id": "j1",
+            "status": "completed",
+            "ffmpeg_rc": 0,
+            "uploaded": True,
+            "duration": 5.1,
+            "size": 123456,
+        }
         with mock.patch("urllib.request.urlopen", return_value=_fake_response(body=result_body)) as m:
             res = client._post_sync(
-                {"inputs":{"in.mp4":"http://x"},"ffmpeg_args":["-i","in.mp4"],
-                 "output_url":"http://relay/k?token=s","timeout":30},
-                mezzanine_path=Path("/tmp/fake.mp4"))
+                {
+                    "inputs": {"in.mp4": "http://x"},
+                    "ffmpeg_args": ["-i", "in.mp4"],
+                    "output_url": "http://relay/k?token=s",
+                    "timeout": 30,
+                },
+                mezzanine_path=Path("/tmp/fake.mp4"),
+            )
         assert res["status"] == "completed" and res["ffmpeg_rc"] == 0
         req = m.call_args[0][0]
         assert req.full_url == "http://gpu.example.com:8900/api/render/sync"
 
     def test_ffmpeg_failure_raises(self, client):
-        body = {"status":"failed","ffmpeg_rc":1,"message":"Invalid data"}
+        body = {"status": "failed", "ffmpeg_rc": 1, "message": "Invalid data"}
         with mock.patch("urllib.request.urlopen", return_value=_fake_response(body=body)):
             with pytest.raises(GpuEncodeError, match="rc=1"):
-                client._post_sync({"inputs":{},"ffmpeg_args":[],"output_url":"","timeout":10},
-                                  mezzanine_path=Path("/tmp/x"))
+                client._post_sync(
+                    {"inputs": {}, "ffmpeg_args": [], "output_url": "", "timeout": 10}, mezzanine_path=Path("/tmp/x")
+                )
 
     def test_http_4xx_raises(self, client):
-        err = urllib.error.HTTPError(url="http://gpu/render/sync", code=422, msg="Unprocessable",
-                                     hdrs={}, fp=BytesIO(b"bad request"))
+        err = urllib.error.HTTPError(
+            url="http://gpu/render/sync", code=422, msg="Unprocessable", hdrs={}, fp=BytesIO(b"bad request")
+        )
         with mock.patch("urllib.request.urlopen", side_effect=err):
             with pytest.raises(GpuEncodeError, match="HTTP 422"):
-                client._post_sync({"inputs":{},"ffmpeg_args":[],"output_url":"","timeout":10},
-                                  mezzanine_path=Path("/tmp/x"))
+                client._post_sync(
+                    {"inputs": {}, "ffmpeg_args": [], "output_url": "", "timeout": 10}, mezzanine_path=Path("/tmp/x")
+                )
 
     def test_connection_error_raises(self, client):
         with mock.patch("urllib.request.urlopen", side_effect=urllib.error.URLError("conn refused")):
             with pytest.raises(GpuEncodeError, match="connection error"):
-                client._post_sync({"inputs":{},"ffmpeg_args":[],"output_url":"","timeout":10},
-                                  mezzanine_path=Path("/tmp/x"))
+                client._post_sync(
+                    {"inputs": {}, "ffmpeg_args": [], "output_url": "", "timeout": 10}, mezzanine_path=Path("/tmp/x")
+                )
 
     def test_timeout_error_raises(self, client):
         with mock.patch("urllib.request.urlopen", side_effect=socket.timeout("timed out")):
             with pytest.raises(GpuEncodeError, match="connection error"):
-                client._post_sync({"inputs":{},"ffmpeg_args":[],"output_url":"","timeout":10},
-                                  mezzanine_path=Path("/tmp/x"))
+                client._post_sync(
+                    {"inputs": {}, "ffmpeg_args": [], "output_url": "", "timeout": 10}, mezzanine_path=Path("/tmp/x")
+                )
 
     def test_bad_json_raises(self, client):
         with mock.patch("urllib.request.urlopen", return_value=_fake_response(body=b"not-json")):
             with pytest.raises(GpuEncodeError, match="bad JSON"):
-                client._post_sync({"inputs":{},"ffmpeg_args":[],"output_url":"","timeout":10},
-                                  mezzanine_path=Path("/tmp/x"))
+                client._post_sync(
+                    {"inputs": {}, "ffmpeg_args": [], "output_url": "", "timeout": 10}, mezzanine_path=Path("/tmp/x")
+                )
 
     def test_uploaded_false_logs_warning_but_succeeds(self, client, caplog):
-        body = {"status":"completed","ffmpeg_rc":0,"uploaded":False,"job_id":"j"}
-        with mock.patch("urllib.request.urlopen", return_value=_fake_response(body=body)), \
-             caplog.at_level("WARNING"):
-            res = client._post_sync({"inputs":{},"ffmpeg_args":[],"output_url":"","timeout":10},
-                                    mezzanine_path=Path("/tmp/x"))
+        body = {"status": "completed", "ffmpeg_rc": 0, "uploaded": False, "job_id": "j"}
+        with mock.patch("urllib.request.urlopen", return_value=_fake_response(body=body)), caplog.at_level("WARNING"):
+            res = client._post_sync(
+                {"inputs": {}, "ffmpeg_args": [], "output_url": "", "timeout": 10}, mezzanine_path=Path("/tmp/x")
+            )
         assert res["status"] == "completed"
         assert "uploaded=false" in caplog.text
 
@@ -239,18 +262,28 @@ class TestDownloadToFile:
 # ── encode_mezzanine_to_output ─────────────────────────────────────
 class TestEncodeMezzanine:
     def test_happy_path_with_audio(self, client, tmp_path):
-        mezz = tmp_path / "mezz.mp4"; mezz.write_bytes(b"M" * 100)
+        mezz = tmp_path / "mezz.mp4"
+        mezz.write_bytes(b"M" * 100)
         out = tmp_path / "out" / "final.mp4"
         with (
             mock.patch.object(client, "_upload_mezzanine", return_value=("http://oss/signed", "osskey1")),
-            mock.patch.object(client, "_post_sync", return_value={
-                "job_id":"j1","status":"completed","ffmpeg_rc":0,"uploaded":True,"size":5000,"duration":1.2,
-            }) as m_post,
+            mock.patch.object(
+                client,
+                "_post_sync",
+                return_value={
+                    "job_id": "j1",
+                    "status": "completed",
+                    "ffmpeg_rc": 0,
+                    "uploaded": True,
+                    "size": 5000,
+                    "duration": 1.2,
+                },
+            ) as m_post,
             mock.patch.object(client, "_download_to_file", return_value=5000) as m_dl,
             mock.patch.object(client, "_relay_delete") as m_del,
             mock.patch.object(client, "_delete_oss") as m_ossdel,
         ):
-            result = client.encode_mezzanine_to_output(mezz, out, audio_args=["-c:a","aac"])
+            result = client.encode_mezzanine_to_output(mezz, out, audio_args=["-c:a", "aac"])
         assert result["output_size"] == 5000 and str(out) == result["output_path"]
         body = m_post.call_args[0][0]
         assert "-c:a" in body["ffmpeg_args"] and "aac" in body["ffmpeg_args"]
@@ -261,11 +294,16 @@ class TestEncodeMezzanine:
         m_ossdel.assert_called_once_with("osskey1")
 
     def test_happy_path_no_audio_uses_an_and_cq(self, client, tmp_path):
-        mezz = tmp_path / "m.mp4"; mezz.write_bytes(b"M")
+        mezz = tmp_path / "m.mp4"
+        mezz.write_bytes(b"M")
         out = tmp_path / "o.mp4"
         with (
-            mock.patch.object(client, "_upload_mezzanine", return_value=("http://oss/u","k")),
-            mock.patch.object(client, "_post_sync", return_value={"status":"completed","ffmpeg_rc":0,"uploaded":True,"job_id":"j"}) as m_post,
+            mock.patch.object(client, "_upload_mezzanine", return_value=("http://oss/u", "k")),
+            mock.patch.object(
+                client,
+                "_post_sync",
+                return_value={"status": "completed", "ffmpeg_rc": 0, "uploaded": True, "job_id": "j"},
+            ) as m_post,
             mock.patch.object(client, "_download_to_file", return_value=100),
             mock.patch.object(client, "_relay_delete"),
             mock.patch.object(client, "_delete_oss"),
@@ -276,18 +314,26 @@ class TestEncodeMezzanine:
             assert str(client.crf) in body["ffmpeg_args"]
 
     def test_bitrate_set_uses_bv_instead_of_cq(self, tmp_path):
-        c = GpuEncoderClient(endpoint="http://gpu", relay_base_url="http://api",
-                             relay_internal_base_url="http://api-int:8000", relay_secret="s", bitrate="2M")
-        mezz = tmp_path / "m.mp4"; mezz.write_bytes(b"x")
+        c = GpuEncoderClient(
+            endpoint="http://gpu",
+            relay_base_url="http://api",
+            relay_internal_base_url="http://api-int:8000",
+            relay_secret="s",
+            bitrate="2M",
+        )
+        mezz = tmp_path / "m.mp4"
+        mezz.write_bytes(b"x")
         out = tmp_path / "o.mp4"
         with (
-            mock.patch.object(c, "_upload_mezzanine", return_value=("http://oss/u","k")),
-            mock.patch.object(c, "_post_sync", return_value={"status":"completed","ffmpeg_rc":0,"uploaded":True,"job_id":"j"}) as m_post,
+            mock.patch.object(c, "_upload_mezzanine", return_value=("http://oss/u", "k")),
+            mock.patch.object(
+                c, "_post_sync", return_value={"status": "completed", "ffmpeg_rc": 0, "uploaded": True, "job_id": "j"}
+            ) as m_post,
             mock.patch.object(c, "_download_to_file", return_value=10),
             mock.patch.object(c, "_relay_delete"),
             mock.patch.object(c, "_delete_oss"),
         ):
-            c.encode_mezzanine_to_output(mezz, out, extra_video_args=["-vf","scale=1280:-2"])
+            c.encode_mezzanine_to_output(mezz, out, extra_video_args=["-vf", "scale=1280:-2"])
             body = m_post.call_args[0][0]
             assert "-b:v" in body["ffmpeg_args"] and "2M" in body["ffmpeg_args"]
             assert "-cq" not in body["ffmpeg_args"]
@@ -295,44 +341,48 @@ class TestEncodeMezzanine:
 
     def test_mezzanine_not_found_raises(self, client, tmp_path):
         with pytest.raises(GpuEncodeError, match="mezzanine file not found"):
-            client.encode_mezzanine_to_output(tmp_path/"nope.mp4", tmp_path/"o.mp4")
+            client.encode_mezzanine_to_output(tmp_path / "nope.mp4", tmp_path / "o.mp4")
 
     def test_relay_base_not_configured_raises(self, tmp_path):
         c = GpuEncoderClient(endpoint="http://gpu", relay_base_url="", relay_secret="s")
-        mezz = tmp_path/"m.mp4"; mezz.write_bytes(b"x")
+        mezz = tmp_path / "m.mp4"
+        mezz.write_bytes(b"x")
         with pytest.raises(GpuEncodeError, match="relay_base_url"):
-            c.encode_mezzanine_to_output(mezz, tmp_path/"o.mp4")
+            c.encode_mezzanine_to_output(mezz, tmp_path / "o.mp4")
 
     def test_unexpected_exception_is_wrapped(self, client, tmp_path):
-        mezz = tmp_path/"m.mp4"; mezz.write_bytes(b"x")
+        mezz = tmp_path / "m.mp4"
+        mezz.write_bytes(b"x")
         with (
-            mock.patch.object(client, "_upload_mezzanine", return_value=("http://oss/u","k")),
+            mock.patch.object(client, "_upload_mezzanine", return_value=("http://oss/u", "k")),
             mock.patch.object(client, "_post_sync", side_effect=RuntimeError("boom")),
             mock.patch.object(client, "_delete_oss"),
         ):
             with pytest.raises(GpuEncodeError, match="unexpected: boom"):
-                client.encode_mezzanine_to_output(mezz, tmp_path/"o.mp4")
+                client.encode_mezzanine_to_output(mezz, tmp_path / "o.mp4")
 
     def test_gpu_encode_error_re_raised_directly(self, client, tmp_path):
-        mezz = tmp_path/"m.mp4"; mezz.write_bytes(b"x")
+        mezz = tmp_path / "m.mp4"
+        mezz.write_bytes(b"x")
         with (
-            mock.patch.object(client, "_upload_mezzanine", return_value=("http://oss/u","k")),
+            mock.patch.object(client, "_upload_mezzanine", return_value=("http://oss/u", "k")),
             mock.patch.object(client, "_post_sync", side_effect=GpuEncodeError("direct fail")),
             mock.patch.object(client, "_delete_oss"),
         ):
             with pytest.raises(GpuEncodeError, match="direct fail"):
-                client.encode_mezzanine_to_output(mezz, tmp_path/"o.mp4")
+                client.encode_mezzanine_to_output(mezz, tmp_path / "o.mp4")
 
     def test_oss_cleanup_runs_on_failure(self, client, tmp_path, caplog):
-        mezz = tmp_path/"m.mp4"; mezz.write_bytes(b"x")
+        mezz = tmp_path / "m.mp4"
+        mezz.write_bytes(b"x")
         with (
-            mock.patch.object(client, "_upload_mezzanine", return_value=("http://oss/u","ossk")),
+            mock.patch.object(client, "_upload_mezzanine", return_value=("http://oss/u", "ossk")),
             mock.patch.object(client, "_post_sync", side_effect=GpuEncodeError("enc fail")),
             mock.patch.object(client, "_delete_oss", side_effect=Exception("oss down")) as m_ossdel,
             caplog.at_level("WARNING"),
         ):
             with pytest.raises(GpuEncodeError):
-                client.encode_mezzanine_to_output(mezz, tmp_path/"o.mp4")
+                client.encode_mezzanine_to_output(mezz, tmp_path / "o.mp4")
             m_ossdel.assert_called_once_with("ossk")
 
 
@@ -352,15 +402,18 @@ class TestRelayDelete:
 # ── OSS helpers ────────────────────────────────────────────────────
 class TestOssHelpers:
     def test_upload_storage_import_error(self, client, tmp_path):
-        mezz = tmp_path/"m.mp4"; mezz.write_bytes(b"x")
+        mezz = tmp_path / "m.mp4"
+        mezz.write_bytes(b"x")
         # 删除 sys.modules 中 packages.shared.storage 使导入失败
         saved = sys.modules.pop("packages.shared.storage", None)
         try:
-            real_import = __builtins__.__import__ if hasattr(__builtins__,"__import__") else __import__
+            real_import = __builtins__.__import__ if hasattr(__builtins__, "__import__") else __import__
+
             def fake_import(name, *a, **kw):
                 if name == "packages.shared.storage" or name.startswith("packages.shared.storage."):
                     raise ImportError("no storage")
                 return real_import(name, *a, **kw)
+
             with mock.patch("builtins.__import__", side_effect=fake_import):
                 with pytest.raises(GpuEncodeError, match="storage service unavailable"):
                     client._upload_mezzanine(mezz)
@@ -369,33 +422,45 @@ class TestOssHelpers:
                 sys.modules["packages.shared.storage"] = saved
 
     def test_upload_storage_none(self, client, tmp_path):
-        mezz = tmp_path/"m.mp4"; mezz.write_bytes(b"x")
-        fake_mod = mock.MagicMock(); fake_mod.get_storage_service.return_value = None
+        mezz = tmp_path / "m.mp4"
+        mezz.write_bytes(b"x")
+        fake_mod = mock.MagicMock()
+        fake_mod.get_storage_service.return_value = None
         with mock.patch.dict("sys.modules", {"packages.shared.storage": fake_mod}):
             with pytest.raises(GpuEncodeError, match="OSS storage not configured"):
                 client._upload_mezzanine(mezz)
 
     def test_upload_bucket_none(self, client, tmp_path):
-        mezz = tmp_path/"m.mp4"; mezz.write_bytes(b"x")
-        svc = mock.MagicMock(); svc.bucket = None
-        fake_mod = mock.MagicMock(); fake_mod.get_storage_service.return_value = svc
+        mezz = tmp_path / "m.mp4"
+        mezz.write_bytes(b"x")
+        svc = mock.MagicMock()
+        svc.bucket = None
+        fake_mod = mock.MagicMock()
+        fake_mod.get_storage_service.return_value = svc
         with mock.patch.dict("sys.modules", {"packages.shared.storage": fake_mod}):
             with pytest.raises(GpuEncodeError, match="OSS storage not configured"):
                 client._upload_mezzanine(mezz)
 
     def test_upload_failure_raises(self, client, tmp_path):
-        mezz = tmp_path/"m.mp4"; mezz.write_bytes(b"x")
-        svc = mock.MagicMock(); svc.bucket = object(); svc.upload_file.side_effect = RuntimeError("oss err")
-        fake_mod = mock.MagicMock(); fake_mod.get_storage_service.return_value = svc
+        mezz = tmp_path / "m.mp4"
+        mezz.write_bytes(b"x")
+        svc = mock.MagicMock()
+        svc.bucket = object()
+        svc.upload_file.side_effect = RuntimeError("oss err")
+        fake_mod = mock.MagicMock()
+        fake_mod.get_storage_service.return_value = svc
         with mock.patch.dict("sys.modules", {"packages.shared.storage": fake_mod}):
             with pytest.raises(GpuEncodeError, match="failed to upload mezzanine"):
                 client._upload_mezzanine(mezz)
 
     def test_upload_success(self, client, tmp_path):
-        mezz = tmp_path/"m.mp4"; mezz.write_bytes(b"x")
-        svc = mock.MagicMock(); svc.bucket = object()
+        mezz = tmp_path / "m.mp4"
+        mezz.write_bytes(b"x")
+        svc = mock.MagicMock()
+        svc.bucket = object()
         svc.get_download_url.return_value = "https://oss/signed?sig=abc"
-        fake_mod = mock.MagicMock(); fake_mod.get_storage_service.return_value = svc
+        fake_mod = mock.MagicMock()
+        fake_mod.get_storage_service.return_value = svc
         with mock.patch.dict("sys.modules", {"packages.shared.storage": fake_mod}):
             url, key = client._upload_mezzanine(mezz)
         assert url.startswith("https://oss/signed")
@@ -403,21 +468,26 @@ class TestOssHelpers:
         svc.upload_file.assert_called_once()
 
     def test_delete_oss_exception_swallowed(self, client, caplog):
-        fake_mod = mock.MagicMock(); fake_mod.get_storage_service.side_effect = RuntimeError("svc down")
+        fake_mod = mock.MagicMock()
+        fake_mod.get_storage_service.side_effect = RuntimeError("svc down")
         with mock.patch.dict("sys.modules", {"packages.shared.storage": fake_mod}), caplog.at_level("DEBUG"):
             client._delete_oss("somekey")
         assert "OSS delete" in caplog.text
 
     def test_delete_oss_bucket_none_noop(self, client):
-        svc = mock.MagicMock(); svc.bucket = None
-        fake_mod = mock.MagicMock(); fake_mod.get_storage_service.return_value = svc
+        svc = mock.MagicMock()
+        svc.bucket = None
+        fake_mod = mock.MagicMock()
+        fake_mod.get_storage_service.return_value = svc
         with mock.patch.dict("sys.modules", {"packages.shared.storage": fake_mod}):
             client._delete_oss("k")
         svc.delete_file.assert_not_called()
 
     def test_delete_oss_success(self, client):
-        svc = mock.MagicMock(); svc.bucket = object()
-        fake_mod = mock.MagicMock(); fake_mod.get_storage_service.return_value = svc
+        svc = mock.MagicMock()
+        svc.bucket = object()
+        fake_mod = mock.MagicMock()
+        fake_mod.get_storage_service.return_value = svc
         with mock.patch.dict("sys.modules", {"packages.shared.storage": fake_mod}):
             client._delete_oss("k")
         svc.delete_file.assert_called_once_with("k")
@@ -436,36 +506,51 @@ class TestSingletonFactory:
                 sys.modules["packages.config"] = saved
 
     def test_build_client_not_enabled_returns_none(self):
-        s = mock.MagicMock(); s.enable_gpu_encode = False
-        fake_mod = mock.MagicMock(); fake_mod.get_shared_settings.return_value = s
+        s = mock.MagicMock()
+        s.enable_gpu_encode = False
+        fake_mod = mock.MagicMock()
+        fake_mod.get_shared_settings.return_value = s
         with mock.patch.dict("sys.modules", {"packages.config": fake_mod}):
             assert _build_client_from_settings() is None
 
     def test_build_client_missing_endpoint(self):
-        s = mock.MagicMock(); s.enable_gpu_encode = True
-        s.gpu_encode_endpoint = ""; s.gpu_encode_relay_base_url = "http://api"
+        s = mock.MagicMock()
+        s.enable_gpu_encode = True
+        s.gpu_encode_endpoint = ""
+        s.gpu_encode_relay_base_url = "http://api"
         s.gpu_encode_relay_internal_base_url = ""
-        fake_mod = mock.MagicMock(); fake_mod.get_shared_settings.return_value = s
+        fake_mod = mock.MagicMock()
+        fake_mod.get_shared_settings.return_value = s
         with mock.patch.dict("sys.modules", {"packages.config": fake_mod}):
             assert _build_client_from_settings() is None
 
     def test_build_client_missing_relay(self):
-        s = mock.MagicMock(); s.enable_gpu_encode = True
-        s.gpu_encode_endpoint = "http://gpu"; s.gpu_encode_relay_base_url = ""
+        s = mock.MagicMock()
+        s.enable_gpu_encode = True
+        s.gpu_encode_endpoint = "http://gpu"
+        s.gpu_encode_relay_base_url = ""
         s.gpu_encode_relay_internal_base_url = ""
-        fake_mod = mock.MagicMock(); fake_mod.get_shared_settings.return_value = s
+        fake_mod = mock.MagicMock()
+        fake_mod.get_shared_settings.return_value = s
         with mock.patch.dict("sys.modules", {"packages.config": fake_mod}):
             assert _build_client_from_settings() is None
 
     def test_build_client_success(self):
-        s = mock.MagicMock(); s.enable_gpu_encode = True
-        s.gpu_encode_endpoint = "http://gpu"; s.gpu_encode_relay_base_url = "http://api/"
+        s = mock.MagicMock()
+        s.enable_gpu_encode = True
+        s.gpu_encode_endpoint = "http://gpu"
+        s.gpu_encode_relay_base_url = "http://api/"
         s.gpu_encode_relay_internal_base_url = "http://api-int:8000/"
-        s.gpu_encode_sync_timeout = 120; s.gpu_encode_health_timeout = 1.0
-        s.gpu_encode_vcodec = "h264_nvenc"; s.gpu_encode_preset = "p7"
-        s.gpu_encode_crf = 20; s.gpu_encode_bitrate = ""; s.gpu_encode_relay_secret = "s"
+        s.gpu_encode_sync_timeout = 120
+        s.gpu_encode_health_timeout = 1.0
+        s.gpu_encode_vcodec = "h264_nvenc"
+        s.gpu_encode_preset = "p7"
+        s.gpu_encode_crf = 20
+        s.gpu_encode_bitrate = ""
+        s.gpu_encode_relay_secret = "s"
         s.gpu_encode_oss_tmp_prefix = "tmp/x/"
-        fake_mod = mock.MagicMock(); fake_mod.get_shared_settings.return_value = s
+        fake_mod = mock.MagicMock()
+        fake_mod.get_shared_settings.return_value = s
         with mock.patch.dict("sys.modules", {"packages.config": fake_mod}):
             c = _build_client_from_settings()
         assert c is not None and c.endpoint == "http://gpu"
@@ -474,8 +559,10 @@ class TestSingletonFactory:
         assert c.preset == "p7" and c.crf == 20
 
     def test_get_gpu_encoder_init_failure_returns_none(self, caplog):
-        with mock.patch("packages.shared.gpu_encoder._build_client_from_settings",
-                        side_effect=RuntimeError("boom")), caplog.at_level("WARNING"):
+        with (
+            mock.patch("packages.shared.gpu_encoder._build_client_from_settings", side_effect=RuntimeError("boom")),
+            caplog.at_level("WARNING"),
+        ):
             assert get_gpu_encoder() is None
         assert "failed to init client" in caplog.text
 
@@ -493,11 +580,11 @@ class TestSingletonFactory:
 # ── Constructor edge cases ────────────────────────────────────────
 class TestConstructor:
     def test_oss_tmp_prefix_empty_uses_default(self):
-        c = GpuEncoderClient(endpoint="http://gpu", relay_base_url="http://api",
-                             relay_secret="s", oss_tmp_prefix="")
+        c = GpuEncoderClient(endpoint="http://gpu", relay_base_url="http://api", relay_secret="s", oss_tmp_prefix="")
         assert c.oss_tmp_prefix == "tmp/gpu-mezzanine/"
 
     def test_oss_tmp_prefix_strips_and_adds_slash(self):
-        c = GpuEncoderClient(endpoint="http://gpu", relay_base_url="http://api",
-                             relay_secret="s", oss_tmp_prefix="tmp/foo")
+        c = GpuEncoderClient(
+            endpoint="http://gpu", relay_base_url="http://api", relay_secret="s", oss_tmp_prefix="tmp/foo"
+        )
         assert c.oss_tmp_prefix == "tmp/foo/"