def test_payload_without_padding(self):
"""Use a payload which isn't padded."""
self.assertEqual(decode(b'\x00\x00\x00\x04ABCD'), b'ABCD')
self.assertEqual(
decode(
b'\x00\x00\x01\x00aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
),
b'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
)
def test_payload_with_padding(self):
"""Use a payload which is padded."""
self.assertEqual(
decode(b'\x00\x00\x00\x04ABCDPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP'),
b'ABCD')
self.assertEqual(
decode(
b'\x00\x00\x00\x05AB\x00CDPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP'
), b'AB\x00CD')
self.assertEqual(decode(b'\x00\x00\x00\x01PP'), b'P')
def test_rountrip_with_padding(self):
"""Encode each test case with padding."""
for data in all_test_cases():
# Round up to the nearest 100
multiplier = 100
target_length = (int((len(data) + 4) / multiplier) + 1) * multiplier
enc = encode(data, target_length)
dec = decode(enc)
self.assertEqual(data, dec)
def test_file_too_small(self):
"""Use a file shorter than the length header."""
with self.assertRaises(ValueError):
decode(b'\x00\x00\x00\x01')
with self.assertRaises(ValueError):
decode(b'\x00\x00\x00\x04ABC')
with self.assertRaises(ValueError):
decode(b'\x00\x00\x00\x08ABCDPPP')
def test_invalid_length(self):
"""Use an invalid length header."""
with self.assertRaises(ValueError):
decode(b'')
with self.assertRaises(ValueError):
decode(b'\xFF')
with self.assertRaises(ValueError):
decode(b'\x00\x00\x00')
def test_payload_with_weird_padding(self):
"""Use a payload which is padded with non-standard characters."""
self.assertEqual(decode(b'\x00\x00\x00\x04ABCDABCD'), b'ABCD')
self.assertEqual(decode(b'\x00\x00\x00\x01P\x00\x00\x00'), b'P')
def test_empty_payload(self):
"""Use an empty file."""
self.assertEqual(decode(b'\x00\x00\x00\x00'), b'')
def test_roundtrip_without_padding(self):
"""Encode each test case without padding."""
for data in all_test_cases():
enc = encode(data, len(data) + 4)
dec = decode(enc)
self.assertEqual(data, dec)