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##
# .test.test_bytea_codec
##
import unittest
import struct
from ..encodings import bytea
byte = struct.Struct('B')
class test_bytea_codec(unittest.TestCase):
def testDecoding(self):
for x in range(255):
c = byte.pack(x)
b = c.decode('bytea')
# normalize into octal escapes
if c == b'\\' and b == "\\\\":
b = "\\" + oct(b'\\'[0])[2:]
elif not b.startswith("\\"):
b = "\\" + oct(ord(b))[2:]
if int(b[1:], 8) != x:
self.fail(
"bytea encoding failed at %d; encoded %r to %r" %(x, c, b,)
)
def testEncoding(self):
self.assertEqual('bytea'.encode('bytea'), b'bytea')
self.assertEqual('\\\\'.encode('bytea'), b'\\')
self.assertRaises(ValueError, '\\'.encode, 'bytea')
self.assertRaises(ValueError, 'foo\\'.encode, 'bytea')
self.assertRaises(ValueError, r'foo\0'.encode, 'bytea')
self.assertRaises(ValueError, r'foo\00'.encode, 'bytea')
self.assertRaises(ValueError, r'\f'.encode, 'bytea')
self.assertRaises(ValueError, r'\800'.encode, 'bytea')
self.assertRaises(ValueError, r'\7f0'.encode, 'bytea')
for x in range(255):
seq = ('\\' + oct(x)[2:].lstrip('0').rjust(3, '0'))
dx = ord(seq.encode('bytea'))
if dx != x:
self.fail(
"generated sequence failed to map back; current is %d, " \
"rendered %r, transformed to %d" %(x, seq, dx)
)
if __name__ == '__main__':
unittest.main()
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