def test_uppercase_escape(self):
    self.assertEqual(uppercase_escape('aä'), 'aä')
    self.assertEqual(uppercase_escape('\\U0001d550'), '𝕐')
def test_uppercase_escape(self):
    self.assertEqual(uppercase_escape('aä'), 'aä')
    self.assertEqual(uppercase_escape('\\U0001d550'), '𝕐')