def test_init(self):
abcd = Monom((1, 1, 1, 1))
ab = Monom(vars=[0, 1])
abc = Monom(vars=[0, 1, 2])
c = Monom(vars=[2])
d = Monom(vars=[3])
_0 = Monom()
self.assertEqual(abcd, (1, 1, 1, 1))
self.assertEqual(abc, (1, 1, 1, 0))
self.assertEqual(ab, (1, 1, 0, 0))
self.assertEqual(c, (0, 0, 1, 0))
self.assertEqual(d, (0, 0, 0, 1))
self.assertTrue(_0.isZero())
