♻️ refactor(tests): stop importing private modules directly

Use from-imports and mocker.patch string paths instead of importing
private modules as objects for monkeypatching.

Author: gaborbernat

tests/test_py_info_extra.py

@@ -9,7 +9,6 @@
 
 import pytest
 
-import py_discovery._compat
 from py_discovery import DiskCache, PythonInfo, PythonSpec
 from py_discovery._py_info import VersionInfo
 
@@ -465,23 +464,23 @@ def test_possible_base_python_basename(mocker) -> None:
     assert "cpython" in names
 
 
-def test_possible_base_case_sensitive(monkeypatch: pytest.MonkeyPatch) -> None:
+def test_possible_base_case_sensitive(mocker) -> None:
     info = copy.deepcopy(CURRENT)
     info.executable = "/usr/bin/CPython3.12"
     info.implementation = "CPython"
-    monkeypatch.setattr(py_discovery._compat, "fs_is_case_sensitive", lambda: True)
+    mocker.patch("py_discovery._compat.fs_is_case_sensitive", return_value=True)
     names = list(info._possible_base())
     lower_names = [n for n in names if n.islower()]
     upper_names = [n for n in names if n.isupper()]
     assert len(lower_names) >= 1
     assert len(upper_names) >= 1
 
 
-def test_possible_base_case_sensitive_upper_equals_base(monkeypatch: pytest.MonkeyPatch) -> None:
+def test_possible_base_case_sensitive_upper_equals_base(mocker) -> None:
     info = copy.deepcopy(CURRENT)
     info.executable = "/usr/bin/JYTHON"
     info.implementation = "JYTHON"
-    monkeypatch.setattr(py_discovery._compat, "fs_is_case_sensitive", lambda: True)
+    mocker.patch("py_discovery._compat.fs_is_case_sensitive", return_value=True)
     names = list(info._possible_base())
     assert "jython" in names
     assert "JYTHON" in names

tests/windows/conftest.py

@@ -126,7 +126,7 @@ def satisfies(spec, impl_must_match=False):
 
 @pytest.fixture
 def _populate_pyinfo_cache(monkeypatch: pytest.MonkeyPatch) -> None:
-    import py_discovery._cached_py_info
+    from py_discovery._cached_py_info import _CACHE
 
     python_core_path = "C:\\Users\\user\\AppData\\Local\\Programs\\Python"
     interpreters = [
@@ -145,4 +145,4 @@ def _populate_pyinfo_cache(monkeypatch: pytest.MonkeyPatch) -> None:
     ]
     for _, major, minor, arch, threaded, exe in interpreters:
         info = _mock_pyinfo(major, minor, arch, exe, threaded)
-        monkeypatch.setitem(py_discovery._cached_py_info._CACHE, Path(info.executable), info)
+        monkeypatch.setitem(_CACHE, Path(info.executable), info)