Ignore nested functions when enforcing type hints in tests (#118948)

pylint/plugins/hass_enforce_type_hints.py

@@ -3138,15 +3138,15 @@ class HassTypeHintChecker(BaseChecker):
 
     _class_matchers: list[ClassTypeHintMatch]
     _function_matchers: list[TypeHintMatch]
-    _module_name: str
+    _module_node: nodes.Module
     _in_test_module: bool
 
     def visit_module(self, node: nodes.Module) -> None:
         """Populate matchers for a Module node."""
         self._class_matchers = []
         self._function_matchers = []
-        self._module_name = node.name
+        self._module_node = node
-        self._in_test_module = self._module_name.startswith("tests.")
+        self._in_test_module = node.name.startswith("tests.")
 
         if (
             self._in_test_module
@@ -3230,7 +3230,7 @@ class HassTypeHintChecker(BaseChecker):
         if node.is_method():
             matchers = _METHOD_MATCH
         else:
-            if self._in_test_module:
+            if self._in_test_module and node.parent is self._module_node:
                 if node.name.startswith("test_"):
                     self._check_test_function(node, False)
                     return

tests/pylint/test_enforce_type_hints.py

@@ -1152,6 +1152,28 @@ def test_pytest_function(
         type_hint_checker.visit_asyncfunctiondef(func_node)
 
 
+def test_pytest_nested_function(
+    linter: UnittestLinter, type_hint_checker: BaseChecker
+) -> None:
+    """Ensure valid hints are accepted for a test function."""
+    func_node, nested_func_node = astroid.extract_node(
+        """
+    async def some_function( #@
+    ):
+        def test_value(value: str) -> bool: #@
+            return value == "Yes"
+        return test_value
+    """,
+        "tests.components.pylint_test.notify",
+    )
+    type_hint_checker.visit_module(func_node.parent)
+
+    with assert_no_messages(
+        linter,
+    ):
+        type_hint_checker.visit_asyncfunctiondef(nested_func_node)
+
+
 def test_pytest_invalid_function(
     linter: UnittestLinter, type_hint_checker: BaseChecker
 ) -> None: