def test_clone(self):
    'Test cloning a Timestamp instance.'
    t1 = Timestamp.utcnow()
    t2 = t1.clone()
    self.assertEqual(t1, t2)
    self.assertIsInstance(t2, Timestamp)
Test cloning a Timestamp instance.
def test_clone(self):
    
    t1 = Timestamp.utcnow()
    t2 = t1.clone()
    self.assertEqual(t1, t2)
    self.assertIsInstance(t2, Timestamp)