Fix typings, use pytest public APIs (#418)

Author: tony

CHANGES

@@ -13,6 +13,12 @@ $ pip install --user --upgrade --pre libvcs
 
 - _Add your latest changes from PRs here_
 
+## libvcs 0.16.5 (unreleased)
+
+### Bug fixes
+
+- Use pytest's public API when importing (#418)
+
 ## libvcs 0.16.4 (2022-09-18)
 
 ### Infrastructure

src/libvcs/conftest.py

@@ -3,14 +3,14 @@
 
 import pytest
 
-from _pytest.doctest import DoctestItem
-
 
 @pytest.fixture(autouse=True)
 def add_doctest_fixtures(
     request: pytest.FixtureRequest,
     doctest_namespace: t.Dict[str, t.Any],
 ) -> None:
+    from _pytest.doctest import DoctestItem
+
     if isinstance(request._pyfuncitem, DoctestItem):
         request.getfixturevalue("add_doctest_fixtures")
         request.getfixturevalue("set_home")

src/libvcs/pytest_plugin.py

@@ -9,9 +9,6 @@
 
 import pytest
 
-from _pytest.doctest import DoctestItem
-from _pytest.fixtures import SubRequest
-
 from libvcs._internal.run import run
 from libvcs.sync.git import GitRemote, GitSync
 from libvcs.sync.hg import HgSync
@@ -410,7 +407,7 @@ def svn_repo(projects_path: pathlib.Path, svn_remote_repo: pathlib.Path) -> SvnS
 
 @pytest.fixture
 def add_doctest_fixtures(
-    request: SubRequest,
+    request: pytest.FixtureRequest,
     doctest_namespace: dict[str, Any],
     tmp_path: pathlib.Path,
     set_home: pathlib.Path,
@@ -420,6 +417,8 @@ def add_doctest_fixtures(
     create_hg_remote_repo: CreateProjectCallbackFixtureProtocol,
     git_repo: pathlib.Path,
 ) -> None:
+    from _pytest.doctest import DoctestItem
+
     if not isinstance(request._pyfuncitem, DoctestItem):  # Only run on doctest items
         return
     doctest_namespace["tmp_path"] = tmp_path

tests/test_pytest_plugin.py

@@ -4,8 +4,6 @@
 
 import pytest
 
-import _pytest.pytester
-
 from libvcs.pytest_plugin import CreateProjectCallbackFixtureProtocol
 
 
@@ -34,7 +32,7 @@ def test_create_svn_remote_repo(
 
 
 def test_plugin(
-    pytester: _pytest.pytester.Pytester,
+    pytester: pytest.Pytester,
     monkeypatch: pytest.MonkeyPatch,
 ) -> None:
     # Initialize variables