Check fixtures for type hints in pylint plugin (#118313)

* Check fixtures for type hints in pylint plugin

* Apply suggestion

tests/pylint/test_enforce_type_hints.py

@@ -1232,6 +1232,86 @@ def test_pytest_invalid_function(
         type_hint_checker.visit_asyncfunctiondef(func_node)
 
 
+def test_pytest_fixture(linter: UnittestLinter, type_hint_checker: BaseChecker) -> None:
+    """Ensure valid hints are accepted for a test fixture."""
+    func_node = astroid.extract_node(
+        """
+    import pytest
+
+    @pytest.fixture
+    def sample_fixture( #@
+        hass: HomeAssistant,
+        caplog: pytest.LogCaptureFixture,
+        aiohttp_server: Callable[[], TestServer],
+        unused_tcp_port_factory: Callable[[], int],
+        enable_custom_integrations: None,
+    ) -> None:
+        pass
+    """,
+        "tests.components.pylint_test.notify",
+    )
+    type_hint_checker.visit_module(func_node.parent)
+
+    with assert_no_messages(
+        linter,
+    ):
+        type_hint_checker.visit_asyncfunctiondef(func_node)
+
+
+@pytest.mark.parametrize("decorator", ["@pytest.fixture", "@pytest.fixture()"])
+def test_pytest_invalid_fixture(
+    linter: UnittestLinter, type_hint_checker: BaseChecker, decorator: str
+) -> None:
+    """Ensure invalid hints are rejected for a test fixture."""
+    func_node, hass_node, caplog_node, none_node = astroid.extract_node(
+        f"""
+    import pytest
+
+    {decorator}
+    def sample_fixture( #@
+        hass: Something, #@
+        caplog: SomethingElse, #@
+        current_request_with_host, #@
+    ) -> Any:
+        pass
+    """,
+        "tests.components.pylint_test.notify",
+    )
+    type_hint_checker.visit_module(func_node.parent)
+
+    with assert_adds_messages(
+        linter,
+        pylint.testutils.MessageTest(
+            msg_id="hass-argument-type",
+            node=hass_node,
+            args=("hass", ["HomeAssistant", "HomeAssistant | None"], "sample_fixture"),
+            line=6,
+            col_offset=4,
+            end_line=6,
+            end_col_offset=19,
+        ),
+        pylint.testutils.MessageTest(
+            msg_id="hass-argument-type",
+            node=caplog_node,
+            args=("caplog", "pytest.LogCaptureFixture", "sample_fixture"),
+            line=7,
+            col_offset=4,
+            end_line=7,
+            end_col_offset=25,
+        ),
+        pylint.testutils.MessageTest(
+            msg_id="hass-argument-type",
+            node=none_node,
+            args=("current_request_with_host", "None", "sample_fixture"),
+            line=8,
+            col_offset=4,
+            end_line=8,
+            end_col_offset=29,
+        ),
+    ):
+        type_hint_checker.visit_asyncfunctiondef(func_node)
+
+
 @pytest.mark.parametrize(
     "entry_annotation",
     [