Add test for Cache.mkdir

testing/test_cacheprovider.py

@@ -1,10 +1,15 @@
-# mypy: allow-untyped-defs
+from enum import auto
+from enum import Enum
 import os
 from pathlib import Path
 import shutil
+from typing import Any
 from typing import Generator
 from typing import List
+from typing import Sequence
+from typing import Tuple
 
+from _pytest.compat import assert_never
 from _pytest.config import ExitCode
 from _pytest.monkeypatch import MonkeyPatch
 from _pytest.pytester import Pytester
@@ -175,7 +180,9 @@ def test_custom_cache_dir_with_env_var(
 
 
 @pytest.mark.parametrize("env", ((), ("TOX_ENV_DIR", "/tox_env_dir")))
-def test_cache_reportheader(env, pytester: Pytester, monkeypatch: MonkeyPatch) -> None:
+def test_cache_reportheader(
+    env: Sequence[str], pytester: Pytester, monkeypatch: MonkeyPatch
+) -> None:
     pytester.makepyfile("""def test_foo(): pass""")
     if env:
         monkeypatch.setenv(*env)
@@ -507,7 +514,7 @@ def test_hello():
         """
         )
 
-        def rlf(fail_import, fail_run):
+        def rlf(fail_import: int, fail_run: int) -> Any:
             monkeypatch.setenv("FAILIMPORT", str(fail_import))
             monkeypatch.setenv("FAILTEST", str(fail_run))
 
@@ -555,7 +562,9 @@ def test_pass():
         """
         )
 
-        def rlf(fail_import, fail_run, args=()):
+        def rlf(
+            fail_import: int, fail_run: int, args: Sequence[str] = ()
+        ) -> Tuple[Any, Any]:
             monkeypatch.setenv("FAILIMPORT", str(fail_import))
             monkeypatch.setenv("FAILTEST", str(fail_run))
 
@@ -1254,20 +1263,41 @@ def test_readme_failed(self, pytester: Pytester) -> None:
         assert self.check_readme(pytester) is True
 
 
-def test_gitignore(pytester: Pytester) -> None:
+class Action(Enum):
+    """Action to perform on the cache directory."""
+
+    MKDIR = auto()
+    SET = auto()
+
+
+@pytest.mark.parametrize("action", list(Action))
+def test_gitignore(
+    pytester: Pytester,
+    action: Action,
+) -> None:
     """Ensure we automatically create .gitignore file in the pytest_cache directory (#3286)."""
     from _pytest.cacheprovider import Cache
 
     config = pytester.parseconfig()
     cache = Cache.for_config(config, _ispytest=True)
-    cache.set("foo", "bar")
+    if action == Action.MKDIR:
+        cache.mkdir("foo")
+    elif action == Action.SET:
+        cache.set("foo", "bar")
+    else:
+        assert_never(action)
     msg = "# Created by pytest automatically.\n*\n"
     gitignore_path = cache._cachedir.joinpath(".gitignore")
     assert gitignore_path.read_text(encoding="UTF-8") == msg
 
     # Does not overwrite existing/custom one.
     gitignore_path.write_text("custom", encoding="utf-8")
-    cache.set("something", "else")
+    if action == Action.MKDIR:
+        cache.mkdir("something")
+    elif action == Action.SET:
+        cache.set("something", "else")
+    else:
+        assert_never(action)
     assert gitignore_path.read_text(encoding="UTF-8") == "custom"