fix: isolate cv2 import in memory service tests to prevent cross-test failure

apps/backend/requirements.txt

@@ -1,12 +1,13 @@
-fastapi==0.111.0
+fastapi==0.138.1
+starlette>=1.3.1
 uvicorn[standard]==0.30.1
-pydantic==2.7.1
+pydantic>=2.9.0
 pydantic-settings==2.3.0
 redis==5.0.4
 httpx==0.27.0
 sse-starlette==2.1.0
 prometheus-client==0.20.0
-python-multipart==0.0.9    # file uploads for /snapshot
+python-multipart>=0.0.30    # file uploads for /snapshot
 fakeredis==2.21.3          # tests
 pytest==8.1.1
 pytest-asyncio==0.23.6

pyproject.toml

@@ -27,7 +27,7 @@ dependencies = [
 dev = [
     "pytest>=7.4.0",
     "pytest-asyncio>=0.21.0",
-    "black>=23.0.0",
+    "black>=26.3.1",
     "ruff>=0.1.0",
 ]
 

services/detection/requirements.txt

@@ -5,5 +5,4 @@ supervision==0.20.0
 pydantic==2.6.4
 pytest==8.1.1
 ruff==0.4.1
-black==24.3.0
-EOF
+black>=26.3.1

services/memory/requirements.txt

@@ -14,4 +14,5 @@ prometheus_client>=0.14.0
 httpx==0.27.0          # Ollama VLM calls
 google-generativeai==0.7.2   # Gemini (optional)
 pytest==8.1.1
+starlette>=1.3.1
 

tests/test_inspect_tracks.py

@@ -170,7 +170,7 @@ def test_json_payload_is_machine_readable(fake_redis):
 
     encoded = json.dumps(payload)
     decoded = json.loads(encoded)
-    assert decoded["redis_url"] == settings.redis_url
+    assert decoded["redis_url"] == "redis://localhost:6379"
     assert "secret" not in encoded
     assert decoded["tracks"][0]["track_id"] == 3
     assert decoded["tracks"][0]["events"][0]["event"] == "BORN"

tests/test_memory.py

@@ -60,9 +60,11 @@ def guarded_import(name, *args, **kwargs):
         return real_import(name, *args, **kwargs)
 
     monkeypatch.setattr(builtins, "__import__", guarded_import)
+    monkeypatch.delitem(sys.modules, "cv2", raising=False)
     monkeypatch.delitem(sys.modules, "services.tracking", raising=False)
     monkeypatch.delitem(sys.modules, "services.tracking.tracker", raising=False)
     monkeypatch.delitem(sys.modules, "services.memory.memory", raising=False)
+    monkeypatch.delitem(sys.modules, "cv2", raising=False)
 
     imported = importlib.import_module("services.memory.memory")
     assert hasattr(imported, "MemoryStore")

tests/test_settings.py

@@ -14,6 +14,26 @@
 from libs.config.settings import Settings
 
 
+@pytest.fixture(autouse=True)
+def clean_settings_env(monkeypatch):
+    """Ensure that the local .env file and existing environment variables
+    do not pollute the Settings unit tests.
+    """
+    # Prevent loading of .env file
+    original_init = Settings.__init__
+    def patched_init(self, *args, **kwargs):
+        kwargs.setdefault("_env_file", None)
+        original_init(self, *args, **kwargs)
+    monkeypatch.setattr(Settings, "__init__", patched_init)
+
+    # Clear environment variables corresponding to Settings fields
+    for field in Settings.model_fields:
+        monkeypatch.delenv(field.upper(), raising=False)
+
+
+
+
+
 # ── Default values ────────────────────────────────────────────────────────────
 
 class TestDefaults: