'Test that comparing Progress objects for equality
works correctly.'

def test_equality(self):

    prg1 = Progress(1, 2)
    prg2 = Progress(2, 4)
    prg3 = Progress(1, 2)
    self.assertEqual(prg1, prg3)
    self.assertNotEqual(prg1, prg2)
    self.assertNotEqual(prg1, prg2)
    self.assertEqual(prg1, prg3)
