Store namespaces respective to directories (#6789)

Co-authored-by: Pierre Sassoulas <pierre.sassoulas@gmail.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/tests/config/test_per_directory_config.py b/tests/config/test_per_directory_config.py
new file mode 100644
index 000000000..9bc0ef9bc
--- /dev/null
+++ b/tests/config/test_per_directory_config.py
@@ -0,0 +1,24 @@
+# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+# For details: https://github.com/PyCQA/pylint/blob/main/LICENSE
+# Copyright (c) https://github.com/PyCQA/pylint/blob/main/CONTRIBUTORS.txt
+
+
+from py._path.local import LocalPath  # type: ignore[import]
+
+from pylint.lint import Run
+
+
+def test_fall_back_on_base_config(tmpdir: LocalPath) -> None:
+    """Test that we correctly fall back on the base config."""
+    # A file under the current dir should fall back to the highest level
+    # For pylint this is ./pylintrc
+    test_file = tmpdir / "test.py"
+    runner = Run([__name__], exit=False)
+    assert id(runner.linter.config) == id(runner.linter._base_config)
+
+    # When the file is a directory that does not have any of its parents in
+    # linter._directory_namespaces it should default to the base config
+    with open(test_file, "w", encoding="utf-8") as f:
+        f.write("1")
+    Run([str(test_file)], exit=False)
+    assert id(runner.linter.config) == id(runner.linter._base_config)