Consolidate conftest.py to root

CHANGES

@@ -17,6 +17,13 @@ $ pip install --user --upgrade --pre libtmux
 ### Tests / docs
 
 - Examples for pytest plugin (#439)
+- Move conftest.py to root level (#440)
+
+  - https://docs.pytest.org/en/stable/deprecations.html#pytest-plugins-in-non-top-level-conftest-files
+  - Less conftest.py files
+  - We can now run py.test for `README.md` without needing to proxy through
+    `docs/index.md`
+
 
 ## libtmux 0.15.2 (2022-09-17)
 

conftest.py

@@ -1 +1,47 @@
+import pathlib
+import shutil
+import typing as t
+
+import pytest
+
+from _pytest.doctest import DoctestItem
+
+from libtmux.pytest_plugin import USING_ZSH
+
+if t.TYPE_CHECKING:
+    from libtmux.session import Session
+
 pytest_plugins = ["pytester"]
+
+
+@pytest.fixture(autouse=True)
+def add_doctest_fixtures(
+    request: pytest.FixtureRequest,
+    doctest_namespace: t.Dict[str, t.Any],
+) -> None:
+    if isinstance(request._pyfuncitem, DoctestItem) and shutil.which("tmux"):
+        request.getfixturevalue("set_home")
+        doctest_namespace["server"] = request.getfixturevalue("server")
+        session: "Session" = request.getfixturevalue("session")
+        doctest_namespace["session"] = session
+        doctest_namespace["window"] = session.attached_window
+        doctest_namespace["pane"] = session.attached_pane
+        doctest_namespace["request"] = request
+
+
+@pytest.fixture(autouse=True, scope="function")
+def set_home(
+    monkeypatch: pytest.MonkeyPatch,
+    user_path: pathlib.Path,
+) -> None:
+    monkeypatch.setenv("HOME", str(user_path))
+
+
+@pytest.fixture(autouse=True, scope="session")
+@pytest.mark.usefixtures("clear_env")
+def setup(
+    request: pytest.FixtureRequest,
+    config_file: pathlib.Path,
+) -> None:
+    if USING_ZSH:
+        request.getfixturevalue("zshrc")