test_quantity.py 文件源码

def _test_quantity_iadd_isub(self, unit, func):
        x = self.Q_(unit, 'centimeter')
        y = self.Q_(unit, 'inch')
        z = self.Q_(unit, 'second')
        a = self.Q_(unit, None)

        func(op.iadd, x, x, self.Q_(unit + unit, 'centimeter'))
        func(op.iadd, x, y, self.Q_(unit + 2.54 * unit, 'centimeter'))
        func(op.iadd, y, x, self.Q_(unit + unit / 2.54, 'inch'))
        func(op.iadd, a, unit, self.Q_(unit + unit, None))
        self.assertRaises(DimensionalityError, op.iadd, 10, x)
        self.assertRaises(DimensionalityError, op.iadd, x, 10)
        self.assertRaises(DimensionalityError, op.iadd, x, z)

        func(op.isub, x, x, self.Q_(unit - unit, 'centimeter'))
        func(op.isub, x, y, self.Q_(unit - 2.54, 'centimeter'))
        func(op.isub, y, x, self.Q_(unit - unit / 2.54, 'inch'))
        func(op.isub, a, unit, self.Q_(unit - unit, None))
        self.assertRaises(DimensionalityError, op.sub, 10, x)
        self.assertRaises(DimensionalityError, op.sub, x, 10)
        self.assertRaises(DimensionalityError, op.sub, x, z)