def pack(self, obj):
data = getattr(obj, "_" + self.name)
size = len(data)
string = pack('I', size)
for i in data:
for structure in self.structures:
string += structure.pack(i)
return string
def test_integer(self):
for size in (8, 16, 32, 64):
for sign in ('signed', 'unsigned', 'semisigned'):
if size == 8 and sign == 'semisigned':
#only combination that dosent exist
continue
if sign == 'signed':
min = -2**(size - 1)
max = 2**(size - 1) - 1
if sign == 'unsigned':
min = 0
max = 2**(size) - 1
if sign == 'semisigned':
min = -1
max = 2**(size) - 2
#good values
structure = IntegerStructure('int', size=size, type=sign)
self.assertEqual(structure.length(min), size / 8)
self.assertTrue(structure.check(min))
self.assertTrue(structure.check(max))
format = structure.xstruct
self.assertEqual(unpack(format, pack(format, min))[0][0], min)
self.assertEqual(unpack(format, pack(format, max))[0][0], max)
#bad values
self.assertRaises(ValueError, structure.check, min - 1)
self.assertRaises(ValueError, structure.check, max + 1)
self.assertRaises(ValueError, structure.check, 0.)
self.assertRaises(ValueError, structure.check, '')
self.assertRaises(ValueError, structure.check, None)
self.assertRaises(ValueError, lambda: IntegerStructure('int', size=7))
self.assertRaises(ValueError,
lambda: IntegerStructure('int', type='supersigned'))
def test_integer(self):
for size in (8, 16, 32, 64):
for sign in ('signed', 'unsigned', 'semisigned'):
if size == 8 and sign == 'semisigned':
#only combination that dosent exist
continue
if sign == 'signed':
min = -2**(size-1)
max = 2**(size-1)-1
if sign == 'unsigned':
min = 0
max = 2**(size)-1
if sign == 'semisigned':
min = -1
max = 2**(size)-2
#good values
structure = IntegerStructure('int', size=size, type=sign)
self.assertEqual(structure.length(min), size/8)
self.assertTrue(structure.check(min))
self.assertTrue(structure.check(max))
format = structure.xstruct
self.assertEqual(unpack(format, pack(format, min))[0][0], min)
self.assertEqual(unpack(format, pack(format, max))[0][0], max)
#bad values
self.assertRaises(ValueError, structure.check, min-1)
self.assertRaises(ValueError, structure.check, max+1)
self.assertRaises(ValueError, structure.check, 0.)
self.assertRaises(ValueError, structure.check, '')
self.assertRaises(ValueError, structure.check, None)
self.assertRaises(ValueError, lambda: IntegerStructure('int', size=7))
self.assertRaises(ValueError, lambda: IntegerStructure('int', type='supersigned'))
def test_string(self):
strings = ['A', '\x00\x01', u'Ж', u'中', u'\U00010346']
structure = StringStructure("string")
self.assertEqual(structure.xstruct, 'S',
"StringStructure's xstruct is %r instead of 'S'" % (structure.xstruct,))
#good values
for string in strings:
try:
structure.check(string)
except:
self.fail("StringStructure said %r is not valid" % (string,))
self.assertEqual(structure.length(string), len(pack(structure.xstruct, string)))
#bad values
self.assertRaises(ValueError, structure.check, 0)
self.assertRaises(ValueError, structure.check, 0.)
self.assertRaises(ValueError, structure.check, None)
def test_character(self):
#good values
CharacterStructure("character")
strings = ['', 'a' '123']
for string in strings:
length = len(string)
structure = CharacterStructure("character", size=length)
self.assertTrue(structure.check(string))
self.assertEqual(structure.length(string), length)
self.assertEqual(pack(structure.xstruct, string), string,
"CharacterStructure's xstruct is talking crazy for %r" % (string,))
#bad values
structure = CharacterStructure("character", size=1)
self.assertRaises(ValueError, structure.check, 0)
self.assertRaises(ValueError, structure.check, 0.)
self.assertRaises(ValueError, structure.check, None)
self.assertRaises(ValueError, structure.check, '')
self.assertRaises(ValueError, structure.check, '12')
def test_character(self):
#good values
CharacterStructure("character")
strings = ['', 'a' '123']
for string in strings:
length = len(string)
structure = CharacterStructure("character", size=length)
self.assertTrue(structure.check(string))
self.assertEqual(structure.length(string), length)
self.assertEqual(
pack(structure.xstruct, string), string,
"CharacterStructure's xstruct is talking crazy for %r" %
(string, ))
#bad values
structure = CharacterStructure("character", size=1)
self.assertRaises(ValueError, structure.check, 0)
self.assertRaises(ValueError, structure.check, 0.)
self.assertRaises(ValueError, structure.check, None)
self.assertRaises(ValueError, structure.check, '')
self.assertRaises(ValueError, structure.check, '12')
def test_string(self):
strings = ['A', '\x00\x01', u'Ж', u'中', u'\U00010346']
structure = StringStructure("string")
self.assertEqual(
structure.xstruct, 'S',
"StringStructure's xstruct is %r instead of 'S'" %
(structure.xstruct, ))
#good values
for string in strings:
try:
structure.check(string)
except:
self.fail("StringStructure said %r is not valid" % (string, ))
self.assertEqual(structure.length(string),
len(pack(structure.xstruct, string)))
#bad values
self.assertRaises(ValueError, structure.check, 0)
self.assertRaises(ValueError, structure.check, 0.)
self.assertRaises(ValueError, structure.check, None)
