'Testing initialisation from valid units'

def testInit(self):

    a = Area(sq_m=100)
    self.assertEqual(a.sq_m, 100)
    a = A(sq_m=100)
    self.assertEqual(a.sq_m, 100)
    a = A(sq_mi=100)
    self.assertEqual(a.sq_m, 258998811.0336)
