tests: fully type the test suite (#2794)

* tests: fully type the test suite

* chore: require more typing

Signed-off-by: Henry Schreiner <henryfs@princeton.edu>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Signed-off-by: Henry Schreiner <henryfs@princeton.edu>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

test/test_container_engine.py

@@ -1,3 +1,5 @@
+from pathlib import Path
+
 import pytest
 
 from . import test_projects, utils
@@ -5,7 +7,9 @@ from . import test_projects, utils
 basic_project = test_projects.new_c_project()
 
 
-def test_podman(tmp_path, capfd, request):
+def test_podman(
+    tmp_path: Path, capfd: pytest.CaptureFixture[str], request: pytest.FixtureRequest
+) -> None:
     if utils.get_platform() != "linux":
         pytest.skip("the test is only relevant to the linux build")
 
@@ -35,7 +39,7 @@ def test_podman(tmp_path, capfd, request):
     assert "test log statement from before-all" in captured.out
 
 
-def test_create_args(tmp_path, capfd):
+def test_create_args(tmp_path: Path, capfd: pytest.CaptureFixture[str]) -> None:
     if utils.get_platform() != "linux":
         pytest.skip("the test is only relevant to the linux build")