tests(conftest,pytest_plugins): Add pytester

This will be used for testing pytest_doctest_docutils

See also: https://docs.pytest.org/en/7.1.x/how-to/writing_plugins.html#testing-plugins

Author: tony

tests/conftest.py

@@ -6,7 +6,7 @@
 
 from sphinx.testing.path import path as sphinx_path
 
-pytest_plugins = "sphinx.testing.fixtures"
+pytest_plugins = ["sphinx.testing.fixtures", "pytester"]
 
 AppParams = t.Tuple[t.Any, t.Dict[str, t.Any]]