Fix Windows test failure: use PurePosixPath instead of real directories

Copilot · nathanjmcdougall · web-flow · commit 220589e86dc5 · 2026-04-09T07:34:16.000Z
The test_only_dots test created a directory named "..." which on Windows is interpreted as parent directory traversal (../..), causing FileExistsError. Since get_project_name_from_dir() only reads Path.name and never accesses the filesystem, all tests now use PurePosixPath synthetic paths instead of creating real directories. Agent-Logs-Url: https://github.com/usethis-python/usethis-python/sessions/b47fb40c-7e7c-44f9-89e3-258b10a5fe34 Co-authored-by: nathanjmcdougall <18602289+nathanjmcdougall@users.noreply.github.com>
diff --git a/tests/usethis/_file/test_dir.py b/tests/usethis/_file/test_dir.py
@@ -1,54 +1,38 @@
-from pathlib import Path
+from pathlib import PurePosixPath
 
 from usethis._config import usethis_config
 from usethis._file.dir import get_project_name_from_dir
 
 
 class TestGetProjectNameFromDir:
-    def test_simple_name(self, tmp_path: Path):
-        path = tmp_path / "my_project"
-        path.mkdir()
-        with usethis_config.set(project_dir=path):
+    def test_simple_name(self):
+        with usethis_config.set(project_dir=PurePosixPath("/fake/my_project")):
             assert get_project_name_from_dir() == "my_project"
 
-    def test_leading_dot(self, tmp_path: Path):
-        path = tmp_path / ".github-private"
-        path.mkdir()
-        with usethis_config.set(project_dir=path):
+    def test_leading_dot(self):
+        with usethis_config.set(project_dir=PurePosixPath("/fake/.github-private")):
             assert get_project_name_from_dir() == "github-private"
 
-    def test_leading_dots(self, tmp_path: Path):
-        path = tmp_path / "..hidden"
-        path.mkdir()
-        with usethis_config.set(project_dir=path):
+    def test_leading_dots(self):
+        with usethis_config.set(project_dir=PurePosixPath("/fake/..hidden")):
             assert get_project_name_from_dir() == "hidden"
 
-    def test_trailing_dot(self, tmp_path: Path):
-        path = tmp_path / "project."
-        path.mkdir()
-        with usethis_config.set(project_dir=path):
+    def test_trailing_dot(self):
+        with usethis_config.set(project_dir=PurePosixPath("/fake/project.")):
             assert get_project_name_from_dir() == "project"
 
-    def test_leading_and_trailing_non_alphanumeric(self, tmp_path: Path):
-        path = tmp_path / "-_project_-"
-        path.mkdir()
-        with usethis_config.set(project_dir=path):
+    def test_leading_and_trailing_non_alphanumeric(self):
+        with usethis_config.set(project_dir=PurePosixPath("/fake/-_project_-")):
             assert get_project_name_from_dir() == "project"
 
-    def test_only_dots(self, tmp_path: Path):
-        path = tmp_path / "..."
-        path.mkdir()
-        with usethis_config.set(project_dir=path):
+    def test_only_dots(self):
+        with usethis_config.set(project_dir=PurePosixPath("/fake/...")):
             assert get_project_name_from_dir() == "hello_world"
 
-    def test_no_valid_chars(self, tmp_path: Path):
-        path = tmp_path / "+"
-        path.mkdir()
-        with usethis_config.set(project_dir=path):
+    def test_no_valid_chars(self):
+        with usethis_config.set(project_dir=PurePosixPath("/fake/+")):
             assert get_project_name_from_dir() == "hello_world"
 
-    def test_drops_invalid_chars(self, tmp_path: Path):
-        path = tmp_path / "h-e+l.l_o"
-        path.mkdir()
-        with usethis_config.set(project_dir=path):
+    def test_drops_invalid_chars(self):
+        with usethis_config.set(project_dir=PurePosixPath("/fake/h-e+l.l_o")):
             assert get_project_name_from_dir() == "h-el.l_o"
