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.venv/Lib/site-packages/ipywidgets/widgets/tests/test_docutils.py

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+# Copyright (c) Jupyter Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+from unittest import TestCase
+
+from ipywidgets.widgets.docutils import doc_subst
+
+
+class TestDocSubst(TestCase):
+
+    def test_substitution(self):
+        snippets = {'key': '62'}
+
+        @doc_subst(snippets)
+        def f():
+            """ Docstring with value {key} """
+
+        assert f.__doc__ == " Docstring with value 62 "
+
+    def test_unused_keys(self):
+        snippets = {'key': '62', 'other-key': 'unused'}
+
+        @doc_subst(snippets)
+        def f():
+            """ Docstring with value {key} """
+
+        assert f.__doc__ == " Docstring with value 62 "