def test_unpack_float(self):
fmt32 = 'f\x00\x00\x20'
fmt64 = 'f\x00\x00\x40'
self.assertAlmostEqual(_S.unpack(fmt32, struct.pack('>f', 3.1415))[0][0], 3.1415, 8)
self.assertEqual(_S.unpack(fmt64, struct.pack('>d', 3.1415)), ((3.1415,),))
data1 = '\x01\x23\x45\x67'
data2 = '\x00\x12\x34\x56\x78'
self.assertEqual(_S.unpack(fmt32, data1), _S.unpack(fmt32, data2, offset=4))
def test_unpack_unsigned(self):
self.assertEqual(_S.unpack('u\x00\x00\x01', '\x80'), ((1,),))
self.assertEqual(_S.unpack('u\x00\x00\x01', '\x80', offset=1), ((0,),))
for i in range(2, 65):
fmt = 'u\x00' + struct.pack('>H', i)
val = '\xc0' + '\x00' * 8
self.assertEqual(_S.unpack(fmt, val), ((2 ** (i - 1) + 2 ** (i - 2),),))
self.assertEqual(_S.unpack(fmt, val, offset=1), ((2 ** (i - 1),),))
def test_long_fmt(self):
fmt = 'c\x00\x00\x08u\x00\x00\x20f\x00\x00\x40'
data = []
for i in range(8):
data += ['z', i, 3.1]
data = struct.pack('>' + 'cId' * 8, *data)
for i, (c, u, d) in enumerate(_S.unpack(fmt, data)):
self.assertEqual(c, 'z')
self.assertEqual(i, u)
self.assertEqual(d, 3.1)
def test_unpack_signed(self):
self.assertEqual(_S.unpack('i\x00\x00\x01', '\x80'), ((-1,),))
self.assertEqual(_S.unpack('i\x00\x00\x01', '\x80', offset=1), ((0,),))
for i in range(2, 65):
fmt = 'i\x00' + struct.pack('>H', i)
val1 = '\xff' * 8
val2 = '\x40' + '\x00' * 8
val3 = '\x80' + '\x00' * 7
self.assertEqual(_S.unpack(fmt, val1), ((-1,),))
self.assertEqual(_S.unpack(fmt, val2), ((2 ** (i - 2),),))
self.assertEqual(_S.unpack(fmt, val2, offset=1), _S.unpack(fmt, val3))
def test_unpack_char(self):
fmt = 'c\x00\x00\x08'
self.assertEqual(_S.unpack(fmt, '\x67')[0][0], 'g')
self.assertEqual(_S.unpack(fmt, '\x06\x70', offset=4)[0][0], 'g')
self.assertEqual(_S.unpack(fmt, 'abcdefgh', cnt=4), (('a',), ('b',), ('c',), ('d',)))
