Fix misdetection of project root with `--stdin-filename` (#3216)

[etc/vim.git] / tests / test_black.py

diff --git a/tests/test_black.py b/tests/test_black.py
index 81e7a9a7d0d43449cbf30ade83effb743d5eb9d8..c76b3faddf556e1bb114efb59296d132eb9f7f4d 100644 (file)
--- a/tests/test_black.py
+++ b/tests/test_black.py
@@ -1396,6 +1396,12 @@ class BlackTestCase(BlackBaseTestCase):
                 (src_dir.resolve(), "pyproject.toml"),
             )
 
                 (src_dir.resolve(), "pyproject.toml"),
             )
 

+            with change_directory(test_dir):
+                self.assertEqual(
+                    black.find_project_root(("-",), stdin_filename="../src/a.py"),
+                    (src_dir.resolve(), "pyproject.toml"),
+                )
+

     @patch(
         "black.files.find_user_pyproject_toml",
     )
     @patch(
         "black.files.find_user_pyproject_toml",
     )