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#!/usr/bin/env python
import unittest
import sys
sys.path.insert(0, '..')
import bitstring
from bitstring import ConstBitStream as CBS
class All(unittest.TestCase):
def testFromFile(self):
s = CBS(filename='test.m1v')
self.assertEqual(s[0:32].hex, '000001b3')
self.assertEqual(s.read(8 * 4).hex, '000001b3')
width = s.read(12).uint
height = s.read(12).uint
self.assertEqual((width, height), (352, 288))
class InterleavedExpGolomb(unittest.TestCase):
def testReading(self):
s = CBS(uie=333)
a = s.read('uie')
self.assertEqual(a, 333)
s = CBS('uie=12, sie=-9, sie=9, uie=1000000')
u = s.unpack('uie, 2*sie, uie')
self.assertEqual(u, [12, -9, 9, 1000000])
def testReadingErrors(self):
s = CBS(10)
self.assertRaises(bitstring.ReadError, s.read, 'uie')
self.assertEqual(s.pos, 0)
self.assertRaises(bitstring.ReadError, s.read, 'sie')
self.assertEqual(s.pos, 0)
class ReadTo(unittest.TestCase):
def testByteAligned(self):
a = CBS('0xaabb00aa00bb')
b = a.readto('0x00', bytealigned=True)
self.assertEqual(b, '0xaabb00')
self.assertEqual(a.bytepos, 3)
b = a.readto('0xaa', bytealigned=True)
self.assertEqual(b, '0xaa')
self.assertRaises(bitstring.ReadError, a.readto, '0xcc', bytealigned=True)
def testNotAligned(self):
a = CBS('0b00111001001010011011')
a.pos = 1
self.assertEqual(a.readto('0b00'), '0b011100')
self.assertEqual(a.readto('0b110'), '0b10010100110')
self.assertRaises(ValueError, a.readto, '')
def testDisallowIntegers(self):
a = CBS('0x0f')
self.assertRaises(ValueError, a.readto, 4)
def testReadingLines(self):
s = b"This is a test\nof reading lines\nof text\n"
b = CBS(bytes=s)
n = bitstring.Bits(bytes=b'\n')
self.assertEqual(b.readto(n).bytes, b'This is a test\n')
self.assertEqual(b.readto(n).bytes, b'of reading lines\n')
self.assertEqual(b.readto(n).bytes, b'of text\n')
class Subclassing(unittest.TestCase):
def testIsInstance(self):
class SubBits(CBS): pass
a = SubBits()
self.assertTrue(isinstance(a, SubBits))
def testClassType(self):
class SubBits(CBS): pass
self.assertEqual(SubBits().__class__, SubBits)
class PadToken(unittest.TestCase):
def testRead(self):
s = CBS('0b100011110001')
a = s.read('pad:1')
self.assertEqual(a, None)
self.assertEqual(s.pos, 1)
a = s.read(3)
self.assertEqual(a, CBS('0b000'))
a = s.read('pad:0')
self.assertEqual(a, None)
self.assertEqual(s.pos, 4)
def testReadList(self):
s = CBS('0b10001111001')
t = s.readlist('pad:1, uint:3, pad:4, uint:3')
self.assertEqual(t, [0, 1])
s.pos = 0
t = s.readlist('pad:1, pad:5')
self.assertEqual(t, [])
self.assertEqual(s.pos, 6)
s.pos = 0
t = s.readlist('pad:1, bin, pad:4, uint:3')
self.assertEqual(t, ['000', 1])
s.pos = 0
t = s.readlist('pad, bin:3, pad:4, uint:3')
self.assertEqual(t, ['000', 1])
class ReadingBytes(unittest.TestCase):
def testUnpackingBytes(self):
s = CBS(80)
t = s.unpack('bytes:1')
self.assertEqual(t[0], b'\x00')
a, b, c = s.unpack('bytes:1, bytes, bytes:2')
self.assertEqual(a, b'\x00')
self.assertEqual(b, b'\x00'*7)
self.assertEqual(c, b'\x00'*2)
def testUnpackingBytesWithKeywords(self):
s = CBS('0x55'*10)
t = s.unpack('pad:a, bytes:b, bytes, pad:a', a=4, b=6)
self.assertEqual(t, [b'\x55'*6, b'\x55'*3])
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