test_audioop.py 文件源码

def test_mul(self):
        for w in 1, 2, 3, 4:
            self.assertEqual(audioop.mul(b'', w, 2), b'')
            self.assertEqual(audioop.mul(bytearray(), w, 2), b'')
            self.assertEqual(audioop.mul(memoryview(b''), w, 2), b'')
            self.assertEqual(audioop.mul(datas[w], w, 0),
                             b'\0' * len(datas[w]))
            self.assertEqual(audioop.mul(datas[w], w, 1),
                             datas[w])
        self.assertEqual(audioop.mul(datas[1], 1, 2),
                         b'\x00\x24\x7f\x80\x7f\x80\xfe')
        self.assertEqual(audioop.mul(datas[2], 2, 2),
                packs[2](0, 0x2468, 0x7fff, -0x8000, 0x7fff, -0x8000, -2))
        self.assertEqual(audioop.mul(datas[3], 3, 2),
                packs[3](0, 0x2468ac, 0x7fffff, -0x800000,
                         0x7fffff, -0x800000, -2))
        self.assertEqual(audioop.mul(datas[4], 4, 2),
                packs[4](0, 0x2468acf0, 0x7fffffff, -0x80000000,
                         0x7fffffff, -0x80000000, -2))