addresses linting issues

Author: jcodella

tests/unit/conftest.py

@@ -0,0 +1,69 @@
+"""Unit-test conftest: install lightweight stubs for Azure Functions packages.
+
+``azure-functions`` and ``azure-durable-functions`` are Azure Functions
+runtime packages that are not installed in the library's dev dependencies —
+they're only needed when *running* the function app, not when testing the
+helper logic inside it.  This conftest inserts minimal stubs into
+``sys.modules`` before any test module is imported so that
+``tests/unit/test_changefeed.py`` (and any other test that imports from
+``azure_functions/``) can be collected without the runtime packages present.
+"""
+
+import sys
+import types
+
+
+def _install_azure_functions_stubs() -> None:
+    # Inject stub sub-modules directly into sys.modules.  Do NOT create or
+    # overwrite the top-level ``azure`` entry — that is a real namespace
+    # package provided by azure-cosmos (a core dependency), and replacing it
+    # with a plain module breaks its sub-package imports.
+
+    # ----- azure.functions -----
+    if "azure.functions" not in sys.modules:
+        af = types.ModuleType("azure.functions")
+
+        class _AuthLevel:
+            FUNCTION = "function"
+
+        af.AuthLevel = _AuthLevel
+        af.DocumentList = list
+        af.HttpRequest = object
+        af.HttpResponse = object
+        sys.modules["azure.functions"] = af
+
+    # ----- azure.durable_functions -----
+    if "azure.durable_functions" not in sys.modules:
+        adf = types.ModuleType("azure.durable_functions")
+
+        class _Noop:
+            """A do-nothing stand-in for DFApp / Blueprint decorators."""
+
+            def __init__(self, *args, **kwargs):
+                pass
+
+            def register_functions(self, *args, **kwargs):
+                pass
+
+            def route(self, *args, **kwargs):
+                return lambda fn: fn
+
+            def durable_client_input(self, *args, **kwargs):
+                return lambda fn: fn
+
+            def orchestration_trigger(self, *args, **kwargs):
+                return lambda fn: fn
+
+            def cosmos_db_trigger(self, *args, **kwargs):
+                return lambda fn: fn
+
+            def activity_trigger(self, *args, **kwargs):
+                return lambda fn: fn
+
+        adf.Blueprint = _Noop
+        adf.DFApp = _Noop
+        adf.DurableOrchestrationContext = object
+        sys.modules["azure.durable_functions"] = adf
+
+
+_install_azure_functions_stubs()

tests/unit/test_changefeed.py

@@ -2,7 +2,7 @@
 
 import os
 import sys
-from unittest.mock import AsyncMock, MagicMock, patch
+from unittest.mock import AsyncMock, patch
 
 import pytest
 
@@ -11,7 +11,6 @@
 
 from function_app import crosses_threshold, increment_counter_by, process_changefeed_batch
 
-
 # =====================================================================
 # crosses_threshold
 # =====================================================================