'Test repr_helper.'

def test_repr_helper(self):

    self.assertEqual('A', util.repr_helper('A'))
    self.assertEqual('5', util.repr_helper(5))
    self.assertEqual('True', util.repr_helper(True))
    self.assertEqual('test=1', util.repr_helper({'test': 1}))
    self.assertEqual('1986-07-09T12:00:00+00:00', util.repr_helper(datetime(1986, 7, 9, 12, 0, 0)))
