color_test.py 文件源码

def test_length(self):
        # should be able to unpack to r,g,b,a and r,g,b
        c = pygame.Color(1,2,3,4)
        self.assertEquals(len(c), 4)

        c.set_length(3)
        self.assertEquals(len(c), 3)

        # it keeps the old alpha anyway...
        self.assertEquals(c.a, 4)

        # however you can't get the alpha in this way:
        self.assertRaises (IndexError, lambda x:c[x], 4)



        c.set_length(4)
        self.assertEquals(len(c), 4)
        self.assertEquals(len(c), 4)

        self.assertRaises (ValueError, c.set_length, 5)
        self.assertRaises (ValueError, c.set_length, -1)
        self.assertRaises (ValueError, c.set_length, 0)
        self.assertRaises (ValueError, c.set_length, pow(2,long_(33)))