def test_signed_cases(self):
test_cases = (
(-64, [0x40]),
(2, [0x02]),
(-2, [0x7E]),
(127, [0xFF, 0x00]),
(-127, [0x81, 0x7F]),
(128, [0x80, 0x01]),
(-128, [0x80, 0x7F]),
(129, [0x81, 0x01]),
(-129, [0xFF, 0x7E]),
)
for value, data in test_cases:
expected_data = bytes(data)
encoded_data = signed_leb128_encode(value)
self.assertEqual(expected_data, encoded_data)
decoded_value = signed_leb128_decode(iter(expected_data))
self.assertEqual(value, decoded_value)
def test_signed_range(self):
for x in range(-1000, 1000):
data = signed_leb128_encode(x)
y = signed_leb128_decode(iter(data))
self.assertEqual(x, y)
def test_signed_wiki_example(self):
""" Test wikipedia example """
data = signed_leb128_encode(-624485)
self.assertEqual(bytes([0x9B, 0xF1, 0x59]), data)
self.assertEqual(-624485, signed_leb128_decode(iter(data)))
