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-rw-r--r--python/bitstring/test/test_bits.py378
1 files changed, 378 insertions, 0 deletions
diff --git a/python/bitstring/test/test_bits.py b/python/bitstring/test/test_bits.py
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+++ b/python/bitstring/test/test_bits.py
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+#!/usr/bin/env python
+
+import unittest
+import sys
+
+sys.path.insert(0, '..')
+import bitstring
+from bitstring import MmapByteArray
+from bitstring import Bits, BitArray, ConstByteStore, ByteStore
+
+class Creation(unittest.TestCase):
+ def testCreationFromBytes(self):
+ s = Bits(bytes=b'\xa0\xff')
+ self.assertEqual((s.len, s.hex), (16, 'a0ff'))
+ s = Bits(bytes=b'abc', length=0)
+ self.assertEqual(s, '')
+
+ def testCreationFromBytesErrors(self):
+ self.assertRaises(bitstring.CreationError, Bits, bytes=b'abc', length=25)
+
+ def testCreationFromDataWithOffset(self):
+ s1 = Bits(bytes=b'\x0b\x1c\x2f', offset=0, length=20)
+ s2 = Bits(bytes=b'\xa0\xb1\xC2', offset=4)
+ self.assertEqual((s2.len, s2.hex), (20, '0b1c2'))
+ self.assertEqual((s1.len, s1.hex), (20, '0b1c2'))
+ self.assertTrue(s1 == s2)
+
+ def testCreationFromHex(self):
+ s = Bits(hex='0xA0ff')
+ self.assertEqual((s.len, s.hex), (16, 'a0ff'))
+ s = Bits(hex='0x0x0X')
+ self.assertEqual((s.length, s.hex), (0, ''))
+
+ def testCreationFromHexWithWhitespace(self):
+ s = Bits(hex=' \n0 X a 4e \r3 \n')
+ self.assertEqual(s.hex, 'a4e3')
+
+ def testCreationFromHexErrors(self):
+ self.assertRaises(bitstring.CreationError, Bits, hex='0xx0')
+ self.assertRaises(bitstring.CreationError, Bits, hex='0xX0')
+ self.assertRaises(bitstring.CreationError, Bits, hex='0Xx0')
+ self.assertRaises(bitstring.CreationError, Bits, hex='-2e')
+ # These really should fail, but it's awkward and not a big deal...
+# self.assertRaises(bitstring.CreationError, Bits, '0x2', length=2)
+# self.assertRaises(bitstring.CreationError, Bits, '0x3', offset=1)
+
+ def testCreationFromBin(self):
+ s = Bits(bin='1010000011111111')
+ self.assertEqual((s.length, s.hex), (16, 'a0ff'))
+ s = Bits(bin='00')[:1]
+ self.assertEqual(s.bin, '0')
+ s = Bits(bin=' 0000 \n 0001\r ')
+ self.assertEqual(s.bin, '00000001')
+
+ def testCreationFromBinWithWhitespace(self):
+ s = Bits(bin=' \r\r\n0 B 00 1 1 \t0 ')
+ self.assertEqual(s.bin, '00110')
+
+ def testCreationFromOctErrors(self):
+ s = Bits('0b00011')
+ self.assertRaises(bitstring.InterpretError, s._getoct)
+ self.assertRaises(bitstring.CreationError, s._setoct, '8')
+
+ def testCreationFromUintWithOffset(self):
+ self.assertRaises(bitstring.Error, Bits, uint=12, length=8, offset=1)
+
+ def testCreationFromUintErrors(self):
+ self.assertRaises(bitstring.CreationError, Bits, uint=-1, length=10)
+ self.assertRaises(bitstring.CreationError, Bits, uint=12)
+ self.assertRaises(bitstring.CreationError, Bits, uint=4, length=2)
+ self.assertRaises(bitstring.CreationError, Bits, uint=0, length=0)
+ self.assertRaises(bitstring.CreationError, Bits, uint=12, length=-12)
+
+ def testCreationFromInt(self):
+ s = Bits(int=0, length=4)
+ self.assertEqual(s.bin, '0000')
+ s = Bits(int=1, length=2)
+ self.assertEqual(s.bin, '01')
+ s = Bits(int=-1, length=11)
+ self.assertEqual(s.bin, '11111111111')
+ s = Bits(int=12, length=7)
+ self.assertEqual(s.int, 12)
+ s = Bits(int=-243, length=108)
+ self.assertEqual((s.int, s.length), (-243, 108))
+ for length in range(6, 10):
+ for value in range(-17, 17):
+ s = Bits(int=value, length=length)
+ self.assertEqual((s.int, s.length), (value, length))
+ s = Bits(int=10, length=8)
+
+ def testCreationFromIntErrors(self):
+ self.assertRaises(bitstring.CreationError, Bits, int=-1, length=0)
+ self.assertRaises(bitstring.CreationError, Bits, int=12)
+ self.assertRaises(bitstring.CreationError, Bits, int=4, length=3)
+ self.assertRaises(bitstring.CreationError, Bits, int=-5, length=3)
+
+ def testCreationFromSe(self):
+ for i in range(-100, 10):
+ s = Bits(se=i)
+ self.assertEqual(s.se, i)
+
+ def testCreationFromSeWithOffset(self):
+ self.assertRaises(bitstring.CreationError, Bits, se=-13, offset=1)
+
+ def testCreationFromSeErrors(self):
+ self.assertRaises(bitstring.CreationError, Bits, se=-5, length=33)
+ s = Bits(bin='001000')
+ self.assertRaises(bitstring.InterpretError, s._getse)
+
+ def testCreationFromUe(self):
+ [self.assertEqual(Bits(ue=i).ue, i) for i in range(0, 20)]
+
+ def testCreationFromUeWithOffset(self):
+ self.assertRaises(bitstring.CreationError, Bits, ue=104, offset=2)
+
+ def testCreationFromUeErrors(self):
+ self.assertRaises(bitstring.CreationError, Bits, ue=-1)
+ self.assertRaises(bitstring.CreationError, Bits, ue=1, length=12)
+ s = Bits(bin='10')
+ self.assertRaises(bitstring.InterpretError, s._getue)
+
+ def testCreationFromBool(self):
+ a = Bits('bool=1')
+ self.assertEqual(a, 'bool=1')
+ b = Bits('bool=0')
+ self.assertEqual(b, [0])
+ c = bitstring.pack('2*bool', 0, 1)
+ self.assertEqual(c, '0b01')
+
+ def testCreationKeywordError(self):
+ self.assertRaises(bitstring.CreationError, Bits, squirrel=5)
+
+ def testDataStoreType(self):
+ a = Bits('0xf')
+ self.assertEqual(type(a._datastore), bitstring.ConstByteStore)
+
+
+class Initialisation(unittest.TestCase):
+ def testEmptyInit(self):
+ a = Bits()
+ self.assertEqual(a, '')
+
+ def testNoPos(self):
+ a = Bits('0xabcdef')
+ try:
+ a.pos
+ except AttributeError:
+ pass
+ else:
+ assert False
+
+ def testFind(self):
+ a = Bits('0xabcd')
+ r = a.find('0xbc')
+ self.assertEqual(r[0], 4)
+ r = a.find('0x23462346246', bytealigned=True)
+ self.assertFalse(r)
+
+ def testRfind(self):
+ a = Bits('0b11101010010010')
+ b = a.rfind('0b010')
+ self.assertEqual(b[0], 11)
+
+ def testFindAll(self):
+ a = Bits('0b0010011')
+ b = list(a.findall([1]))
+ self.assertEqual(b, [2, 5, 6])
+
+
+class Cut(unittest.TestCase):
+ def testCut(self):
+ s = Bits(30)
+ for t in s.cut(3):
+ self.assertEqual(t, [0] * 3)
+
+
+class InterleavedExpGolomb(unittest.TestCase):
+ def testCreation(self):
+ s1 = Bits(uie=0)
+ s2 = Bits(uie=1)
+ self.assertEqual(s1, [1])
+ self.assertEqual(s2, [0, 0, 1])
+ s1 = Bits(sie=0)
+ s2 = Bits(sie=-1)
+ s3 = Bits(sie=1)
+ self.assertEqual(s1, [1])
+ self.assertEqual(s2, [0, 0, 1, 1])
+ self.assertEqual(s3, [0, 0, 1, 0])
+
+ def testCreationFromProperty(self):
+ s = BitArray()
+ s.uie = 45
+ self.assertEqual(s.uie, 45)
+ s.sie = -45
+ self.assertEqual(s.sie, -45)
+
+ def testInterpretation(self):
+ for x in range(101):
+ self.assertEqual(Bits(uie=x).uie, x)
+ for x in range(-100, 100):
+ self.assertEqual(Bits(sie=x).sie, x)
+
+ def testErrors(self):
+ for f in ['sie=100, 0b1001', '0b00', 'uie=100, 0b1001']:
+ s = Bits(f)
+ self.assertRaises(bitstring.InterpretError, s._getsie)
+ self.assertRaises(bitstring.InterpretError, s._getuie)
+ self.assertRaises(ValueError, Bits, 'uie=-10')
+
+
+class FileBased(unittest.TestCase):
+ def setUp(self):
+ self.a = Bits(filename='smalltestfile')
+ self.b = Bits(filename='smalltestfile', offset=16)
+ self.c = Bits(filename='smalltestfile', offset=20, length=16)
+ self.d = Bits(filename='smalltestfile', offset=20, length=4)
+
+ def testCreationWithOffset(self):
+ self.assertEqual(self.a, '0x0123456789abcdef')
+ self.assertEqual(self.b, '0x456789abcdef')
+ self.assertEqual(self.c, '0x5678')
+
+ def testBitOperators(self):
+ x = self.b[4:20]
+ self.assertEqual(x, '0x5678')
+ self.assertEqual((x & self.c).hex, self.c.hex)
+ self.assertEqual(self.c ^ self.b[4:20], 16)
+ self.assertEqual(self.a[23:36] | self.c[3:], self.c[3:])
+
+ def testAddition(self):
+ h = self.d + '0x1'
+ x = self.a[20:24] + self.c[-4:] + self.c[8:12]
+ self.assertEqual(x, '0x587')
+ x = self.b + x
+ self.assertEqual(x.hex, '456789abcdef587')
+ x = BitArray(x)
+ del x[12:24]
+ self.assertEqual(x, '0x456abcdef587')
+
+class Mmap(unittest.TestCase):
+ def setUp(self):
+ self.f = open('smalltestfile', 'rb')
+
+ def tearDown(self):
+ self.f.close()
+
+ def testByteArrayEquivalence(self):
+ a = MmapByteArray(self.f)
+ self.assertEqual(a.bytelength, 8)
+ self.assertEqual(len(a), 8)
+ self.assertEqual(a[0], 0x01)
+ self.assertEqual(a[1], 0x23)
+ self.assertEqual(a[7], 0xef)
+ self.assertEqual(a[0:1], bytearray([1]))
+ self.assertEqual(a[:], bytearray([0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef]))
+ self.assertEqual(a[2:4], bytearray([0x45, 0x67]))
+
+ def testWithLength(self):
+ a = MmapByteArray(self.f, 3)
+ self.assertEqual(a[0], 0x01)
+ self.assertEqual(len(a), 3)
+
+ def testWithOffset(self):
+ a = MmapByteArray(self.f, None, 5)
+ self.assertEqual(len(a), 3)
+ self.assertEqual(a[0], 0xab)
+
+ def testWithLengthAndOffset(self):
+ a = MmapByteArray(self.f, 3, 3)
+ self.assertEqual(len(a), 3)
+ self.assertEqual(a[0], 0x67)
+ self.assertEqual(a[:], bytearray([0x67, 0x89, 0xab]))
+
+
+class Comparisons(unittest.TestCase):
+ def testUnorderable(self):
+ a = Bits(5)
+ b = Bits(5)
+ self.assertRaises(TypeError, a.__lt__, b)
+ self.assertRaises(TypeError, a.__gt__, b)
+ self.assertRaises(TypeError, a.__le__, b)
+ self.assertRaises(TypeError, a.__ge__, b)
+
+
+class Subclassing(unittest.TestCase):
+
+ def testIsInstance(self):
+ class SubBits(bitstring.Bits): pass
+ a = SubBits()
+ self.assertTrue(isinstance(a, SubBits))
+
+ def testClassType(self):
+ class SubBits(bitstring.Bits): pass
+ self.assertEqual(SubBits().__class__, SubBits)
+
+
+class LongBoolConversion(unittest.TestCase):
+
+ def testLongBool(self):
+ a = Bits(1000)
+ b = bool(a)
+ self.assertTrue(b is False)
+
+
+# Some basic tests for the private ByteStore classes
+
+class ConstByteStoreCreation(unittest.TestCase):
+
+ def testProperties(self):
+ a = ConstByteStore(bytearray(b'abc'))
+ self.assertEqual(a.bytelength, 3)
+ self.assertEqual(a.offset, 0)
+ self.assertEqual(a.bitlength, 24)
+ self.assertEqual(a._rawarray, b'abc')
+
+ def testGetBit(self):
+ a = ConstByteStore(bytearray([0x0f]))
+ self.assertEqual(a.getbit(0), False)
+ self.assertEqual(a.getbit(3), False)
+ self.assertEqual(a.getbit(4), True)
+ self.assertEqual(a.getbit(7), True)
+
+ b = ConstByteStore(bytearray([0x0f]), 7, 1)
+ self.assertEqual(b.getbit(2), False)
+ self.assertEqual(b.getbit(3), True)
+
+ def testGetByte(self):
+ a = ConstByteStore(bytearray(b'abcde'), 1, 13)
+ self.assertEqual(a.getbyte(0), 97)
+ self.assertEqual(a.getbyte(1), 98)
+ self.assertEqual(a.getbyte(4), 101)
+
+
+class PadToken(unittest.TestCase):
+
+ def testCreation(self):
+ a = Bits('pad:10')
+ self.assertEqual(a, Bits(10))
+ b = Bits('pad:0')
+ self.assertEqual(b, Bits())
+ c = Bits('0b11, pad:1, 0b111')
+ self.assertEqual(c, Bits('0b110111'))
+
+ def testPack(self):
+ s = bitstring.pack('0b11, pad:3=5, 0b1')
+ self.assertEqual(s.bin, '110001')
+ d = bitstring.pack('pad:c', c=12)
+ self.assertEqual(d, Bits(12))
+ e = bitstring.pack('0xf, uint:12, pad:1, bin, pad:4, 0b10', 0, '111')
+ self.assertEqual(e.bin, '11110000000000000111000010')
+
+ def testUnpack(self):
+ s = Bits('0b111000111')
+ x, y = s.unpack('3, pad:3, 3')
+ self.assertEqual((x, y), (7, 7))
+ x, y = s.unpack('2, pad:2, bin')
+ self.assertEqual((x, y), (3, '00111'))
+ x = s.unpack('pad:1, pad:2, pad:3')
+ self.assertEqual(x, [])
+
+
+class ModifiedByAddingBug(unittest.TestCase):
+
+ def testAdding(self):
+ a = Bits('0b0')
+ b = Bits('0b11')
+ c = a + b
+ self.assertEqual(c, '0b011')
+ self.assertEqual(a, '0b0')
+ self.assertEqual(b, '0b11')
+
+ def testAdding2(self):
+ a = Bits(100)
+ b = Bits(101)
+ c = a + b
+ self.assertEqual(a, 100)
+ self.assertEqual(b, 101)
+ self.assertEqual(c, 201)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 02:25:55 +0000