'Testing comparisons'

def testComparisons(self):

    a1 = A(sq_m=100)
    a2 = A(sq_km=1)
    a3 = A(sq_km=0)
    self.assertGreater(a2, a1)
    self.assertEqual(a1, a1)
    self.assertLess(a1, a2)
    self.assertFalse(a3)
