Merge pull request #5011 from blueyed/merge-master-into-features

Merge master into features

src/_pytest/hookspec.py

@@ -99,7 +99,8 @@ def pytest_cmdline_parse(pluginmanager, args):
     Stops at first non-None result, see :ref:`firstresult`
 
     .. note::
-        This hook will not be called for ``conftest.py`` files, only for setuptools plugins.
+        This hook will only be called for plugin classes passed to the ``plugins`` arg when using `pytest.main`_ to
+        perform an in-process test run.
 
     :param _pytest.config.PytestPluginManager pluginmanager: pytest plugin manager
     :param list[str] args: list of arguments passed on the command line

src/_pytest/pytester.py

@@ -335,6 +335,15 @@ def testdir(request, tmpdir_factory):
     return Testdir(request, tmpdir_factory)
 
 
+@pytest.fixture
+def _config_for_test():
+    from _pytest.config import get_config
+
+    config = get_config()
+    yield config
+    config._ensure_unconfigure()  # cleanup, e.g. capman closing tmpfiles.
+
+
 rex_outcome = re.compile(r"(\d+) ([\w-]+)")