from unittest import TestCase import simplejson from simplejson.compat import text_type, u # Tests for issue demonstrated in https://github.com/simplejson/simplejson/issues/144 class WonkyTextSubclass(text_type): def __getslice__(self, start, end): return self.__class__('not what you wanted!') class TestStrSubclass(TestCase): def test_dump_load(self): for s in ['', '"hello"', 'text', u('\u005c')]: self.assertEqual( s, simplejson.loads(simplejson.dumps(WonkyTextSubclass(s))))