Yet another approach

Signed-off-by: Julien Jerphanion <git@jjerphan.xyz>

micromamba/tests/test_create.py

@@ -666,19 +666,19 @@ def test_create_envs_dirs(tmp_root_prefix: Path, tmp_path: Path, monkeypatch):
 
     noperm_root_dir = Path(tmp_path / "noperm")
     noperm_envs_dir = noperm_root_dir / "envs"
+    # On Windows, use a different root prefix to avoid permission issues.
+    if platform.system() == "Windows":
+        noperm_envs_dir = "C:\\no_perms\\envs"
+    else:
+        # Make the root dir not writable, not readable, nor executable by the user.
+        os.makedirs(noperm_root_dir, mode=stat.S_IWOTH)
 
     monkeypatch.setenv("CONDA_ENVS_DIRS", f"{noperm_envs_dir},{tmp_path}")
     env_name = "myenv"
-    os.makedirs(noperm_root_dir, exist_ok=True)
 
-    try:
-        # Make the first envs dir not writable, readable, nor executable.
-        current_perms = stat.S_IMODE(os.stat(noperm_root_dir).st_mode)
-        os.chmod(noperm_root_dir, stat.S_IRUSR)
-        helpers.create("-n", env_name, "--offline", "--no-rc", no_dry_run=True)
-    finally:
-        os.chmod(noperm_root_dir, current_perms)
+    helpers.create("-n", env_name, "--offline", "--no-rc", no_dry_run=True)
 
+    assert not (noperm_envs_dir / env_name).exists()
     assert (tmp_path / env_name / "conda-meta" / "history").exists()