Update contrib/python/traitlets/py3 to 5.11.2

1 files changed, 26 insertions, 0 deletions

diff --git a/contrib/python/traitlets/py3/tests/utils/test_importstring.py b/contrib/python/traitlets/py3/tests/utils/test_importstring.py
new file mode 100644
index 00000000000..8ce28add41e
--- /dev/null
+++ b/contrib/python/traitlets/py3/tests/utils/test_importstring.py
@@ -0,0 +1,26 @@
+# Copyright (c) IPython Development Team.
+# Distributed under the terms of the Modified BSD License.
+#
+# Adapted from enthought.traits, Copyright (c) Enthought, Inc.,
+# also under the terms of the Modified BSD License.
+"""Tests for traitlets.utils.importstring."""
+
+import os
+from unittest import TestCase
+
+from traitlets.utils.importstring import import_item
+
+
+class TestImportItem(TestCase):
+    def test_import_unicode(self):
+        self.assertIs(os, import_item("os"))
+        self.assertIs(os.path, import_item("os.path"))
+        self.assertIs(os.path.join, import_item("os.path.join"))
+
+    def test_bad_input(self):
+        class NotAString:
+            pass
+
+        msg = "import_item accepts strings, not '%s'." % NotAString
+        with self.assertRaisesRegex(TypeError, msg):
+            import_item(NotAString())  # type:ignore[arg-type]