def test_get_top_level_by_key(self):
     doc = {'foo': 'bar'}
     assert rewrite.get_by_key(doc, 'foo') == 'bar'
 def test_nested_by_key(self):
     doc = {'foo': {'bar': {'baz': 'hello world'}}}
     assert rewrite.get_by_key(doc, 'foo.bar.baz') == 'hello world'