[7.4.x] Fixes for typed pluggy (#11355)

Since version 1.3 pluggy added typing, which requires some fixes to
please mypy.

doc/en/reference/reference.rst

@@ -978,10 +978,10 @@ TestShortLogReport
 .. autoclass:: pytest.TestShortLogReport()
     :members:
 
-_Result
+Result
 ~~~~~~~
 
-Result object used within :ref:`hook wrappers <hookwrapper>`, see :py:class:`_Result in the pluggy documentation <pluggy._callers._Result>` for more information.
+Result object used within :ref:`hook wrappers <hookwrapper>`, see :py:class:`Result in the pluggy documentation <pluggy.Result>` for more information.
 
 Stash
 ~~~~~

src/_pytest/config/__init__.py

@@ -444,10 +444,10 @@ class PytestPluginManager(PluginManager):
         # so we avoid accessing possibly non-readable attributes
         # (see issue #1073).
         if not name.startswith("pytest_"):
-            return
+            return None
         # Ignore names which can not be hooks.
         if name == "pytest_plugins":
-            return
+            return None
 
         opts = super().parse_hookimpl_opts(plugin, name)
         if opts is not None:
@@ -456,9 +456,9 @@ class PytestPluginManager(PluginManager):
         method = getattr(plugin, name)
         # Consider only actual functions for hooks (#3775).
         if not inspect.isroutine(method):
-            return
+            return None
         # Collect unmarked hooks as long as they have the `pytest_' prefix.
-        return _get_legacy_hook_marks(
+        return _get_legacy_hook_marks(  # type: ignore[return-value]
             method, "impl", ("tryfirst", "trylast", "optionalhook", "hookwrapper")
         )
 
@@ -467,7 +467,7 @@ class PytestPluginManager(PluginManager):
         if opts is None:
             method = getattr(module_or_class, name)
             if name.startswith("pytest_"):
-                opts = _get_legacy_hook_marks(
+                opts = _get_legacy_hook_marks(  # type: ignore[assignment]
                     method,
                     "spec",
                     ("firstresult", "historic"),
@@ -1065,9 +1065,10 @@ class Config:
             fin()
 
     def get_terminal_writer(self) -> TerminalWriter:
-        terminalreporter: TerminalReporter = self.pluginmanager.get_plugin(
+        terminalreporter: Optional[TerminalReporter] = self.pluginmanager.get_plugin(
             "terminalreporter"
         )
+        assert terminalreporter is not None
         return terminalreporter._tw
 
     def pytest_cmdline_parse(

src/_pytest/helpconfig.py

@@ -11,6 +11,7 @@ from _pytest.config import Config
 from _pytest.config import ExitCode
 from _pytest.config import PrintHelp
 from _pytest.config.argparsing import Parser
+from _pytest.terminal import TerminalReporter
 
 
 class HelpAction(Action):
@@ -159,7 +160,10 @@ def pytest_cmdline_main(config: Config) -> Optional[Union[int, ExitCode]]:
 def showhelp(config: Config) -> None:
     import textwrap
 
-    reporter = config.pluginmanager.get_plugin("terminalreporter")
+    reporter: Optional[TerminalReporter] = config.pluginmanager.get_plugin(
+        "terminalreporter"
+    )
+    assert reporter is not None
     tw = reporter._tw
     tw.write(config._parser.optparser.format_help())
     tw.line()

src/_pytest/logging.py

@@ -660,6 +660,8 @@ class LoggingPlugin:
         )
         if self._log_cli_enabled():
             terminal_reporter = config.pluginmanager.get_plugin("terminalreporter")
+            # Guaranteed by `_log_cli_enabled()`.
+            assert terminal_reporter is not None
             capture_manager = config.pluginmanager.get_plugin("capturemanager")
             # if capturemanager plugin is disabled, live logging still works.
             self.log_cli_handler: Union[

src/_pytest/pytester.py

@@ -752,7 +752,7 @@ class Pytester:
 
     def make_hook_recorder(self, pluginmanager: PytestPluginManager) -> HookRecorder:
         """Create a new :class:`HookRecorder` for a :class:`PytestPluginManager`."""
-        pluginmanager.reprec = reprec = HookRecorder(pluginmanager, _ispytest=True)
+        pluginmanager.reprec = reprec = HookRecorder(pluginmanager, _ispytest=True)  # type: ignore[attr-defined]
         self._request.addfinalizer(reprec.finish_recording)
         return reprec
 

testing/test_pluginmanager.py

@@ -242,8 +242,12 @@ class TestPytestPluginManager:
         mod = types.ModuleType("temp")
         mod.__dict__["pytest_plugins"] = ["pytest_p1", "pytest_p2"]
         pytestpm.consider_module(mod)
-        assert pytestpm.get_plugin("pytest_p1").__name__ == "pytest_p1"
+        p1 = pytestpm.get_plugin("pytest_p1")
-        assert pytestpm.get_plugin("pytest_p2").__name__ == "pytest_p2"
+        assert p1 is not None
+        assert p1.__name__ == "pytest_p1"
+        p2 = pytestpm.get_plugin("pytest_p2")
+        assert p2 is not None
+        assert p2.__name__ == "pytest_p2"
 
     def test_consider_module_import_module(
         self, pytester: Pytester, _config_for_test: Config
@@ -336,6 +340,7 @@ class TestPytestPluginManager:
         len2 = len(pytestpm.get_plugins())
         assert len1 == len2
         plugin1 = pytestpm.get_plugin("pytest_hello")
+        assert plugin1 is not None
         assert plugin1.__name__.endswith("pytest_hello")
         plugin2 = pytestpm.get_plugin("pytest_hello")
         assert plugin2 is plugin1
@@ -351,6 +356,7 @@ class TestPytestPluginManager:
         pluginname = "pkg.plug"
         pytestpm.import_plugin(pluginname)
         mod = pytestpm.get_plugin("pkg.plug")
+        assert mod is not None
         assert mod.x == 3
 
     def test_consider_conftest_deps(