237 lines
8.4 KiB
Python
237 lines
8.4 KiB
Python
"""Test the binascii C module."""
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from test import test_support
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import unittest
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import binascii
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import array
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# Note: "*_hex" functions are aliases for "(un)hexlify"
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b2a_functions = ['b2a_base64', 'b2a_hex', 'b2a_hqx', 'b2a_qp', 'b2a_uu',
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'hexlify', 'rlecode_hqx']
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a2b_functions = ['a2b_base64', 'a2b_hex', 'a2b_hqx', 'a2b_qp', 'a2b_uu',
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'unhexlify', 'rledecode_hqx']
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all_functions = a2b_functions + b2a_functions + ['crc32', 'crc_hqx']
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class BinASCIITest(unittest.TestCase):
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type2test = str
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# Create binary test data
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rawdata = "The quick brown fox jumps over the lazy dog.\r\n"
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# Be slow so we don't depend on other modules
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rawdata += "".join(map(chr, xrange(256)))
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rawdata += "\r\nHello world.\n"
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def setUp(self):
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self.data = self.type2test(self.rawdata)
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def test_exceptions(self):
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# Check module exceptions
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self.assertTrue(issubclass(binascii.Error, Exception))
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self.assertTrue(issubclass(binascii.Incomplete, Exception))
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def test_functions(self):
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# Check presence of all functions
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for name in all_functions:
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self.assertTrue(hasattr(getattr(binascii, name), '__call__'))
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self.assertRaises(TypeError, getattr(binascii, name))
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def test_returned_value(self):
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# Limit to the minimum of all limits (b2a_uu)
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MAX_ALL = 45
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raw = self.rawdata[:MAX_ALL]
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for fa, fb in zip(a2b_functions, b2a_functions):
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a2b = getattr(binascii, fa)
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b2a = getattr(binascii, fb)
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try:
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a = b2a(self.type2test(raw))
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res = a2b(self.type2test(a))
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except Exception, err:
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self.fail("{}/{} conversion raises {!r}".format(fb, fa, err))
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if fb == 'b2a_hqx':
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# b2a_hqx returns a tuple
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res, _ = res
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self.assertEqual(res, raw, "{}/{} conversion: "
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"{!r} != {!r}".format(fb, fa, res, raw))
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self.assertIsInstance(res, str)
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self.assertIsInstance(a, str)
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self.assertLess(max(ord(c) for c in a), 128)
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self.assertIsInstance(binascii.crc_hqx(raw, 0), int)
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self.assertIsInstance(binascii.crc32(raw), int)
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def test_base64valid(self):
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# Test base64 with valid data
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MAX_BASE64 = 57
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lines = []
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for i in range(0, len(self.rawdata), MAX_BASE64):
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b = self.type2test(self.rawdata[i:i+MAX_BASE64])
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a = binascii.b2a_base64(b)
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lines.append(a)
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res = ""
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for line in lines:
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a = self.type2test(line)
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b = binascii.a2b_base64(a)
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res = res + b
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self.assertEqual(res, self.rawdata)
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def test_base64invalid(self):
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# Test base64 with random invalid characters sprinkled throughout
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# (This requires a new version of binascii.)
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MAX_BASE64 = 57
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lines = []
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for i in range(0, len(self.data), MAX_BASE64):
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b = self.type2test(self.rawdata[i:i+MAX_BASE64])
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a = binascii.b2a_base64(b)
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lines.append(a)
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fillers = ""
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valid = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789+/"
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for i in xrange(256):
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c = chr(i)
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if c not in valid:
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fillers += c
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def addnoise(line):
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noise = fillers
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ratio = len(line) // len(noise)
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res = ""
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while line and noise:
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if len(line) // len(noise) > ratio:
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c, line = line[0], line[1:]
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else:
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c, noise = noise[0], noise[1:]
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res += c
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return res + noise + line
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res = ""
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for line in map(addnoise, lines):
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a = self.type2test(line)
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b = binascii.a2b_base64(a)
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res += b
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self.assertEqual(res, self.rawdata)
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# Test base64 with just invalid characters, which should return
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# empty strings. TBD: shouldn't it raise an exception instead ?
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self.assertEqual(binascii.a2b_base64(self.type2test(fillers)), '')
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def test_uu(self):
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MAX_UU = 45
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lines = []
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for i in range(0, len(self.data), MAX_UU):
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b = self.type2test(self.rawdata[i:i+MAX_UU])
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a = binascii.b2a_uu(b)
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lines.append(a)
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res = ""
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for line in lines:
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a = self.type2test(line)
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b = binascii.a2b_uu(a)
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res += b
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self.assertEqual(res, self.rawdata)
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self.assertEqual(binascii.a2b_uu("\x7f"), "\x00"*31)
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self.assertEqual(binascii.a2b_uu("\x80"), "\x00"*32)
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self.assertEqual(binascii.a2b_uu("\xff"), "\x00"*31)
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self.assertRaises(binascii.Error, binascii.a2b_uu, "\xff\x00")
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self.assertRaises(binascii.Error, binascii.a2b_uu, "!!!!")
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self.assertRaises(binascii.Error, binascii.b2a_uu, 46*"!")
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# Issue #7701 (crash on a pydebug build)
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self.assertEqual(binascii.b2a_uu('x'), '!> \n')
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def test_crc32(self):
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crc = binascii.crc32(self.type2test("Test the CRC-32 of"))
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crc = binascii.crc32(self.type2test(" this string."), crc)
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self.assertEqual(crc, 1571220330)
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self.assertRaises(TypeError, binascii.crc32)
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def test_hqx(self):
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# Perform binhex4 style RLE-compression
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# Then calculate the hexbin4 binary-to-ASCII translation
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rle = binascii.rlecode_hqx(self.data)
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a = binascii.b2a_hqx(self.type2test(rle))
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b, _ = binascii.a2b_hqx(self.type2test(a))
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res = binascii.rledecode_hqx(b)
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self.assertEqual(res, self.rawdata)
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def test_hex(self):
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# test hexlification
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s = '{s\005\000\000\000worldi\002\000\000\000s\005\000\000\000helloi\001\000\000\0000'
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t = binascii.b2a_hex(self.type2test(s))
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u = binascii.a2b_hex(self.type2test(t))
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self.assertEqual(s, u)
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self.assertRaises(TypeError, binascii.a2b_hex, t[:-1])
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self.assertRaises(TypeError, binascii.a2b_hex, t[:-1] + 'q')
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# Verify the treatment of Unicode strings
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if test_support.have_unicode:
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self.assertEqual(binascii.hexlify(unicode('a', 'ascii')), '61')
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def test_qp(self):
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# A test for SF bug 534347 (segfaults without the proper fix)
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try:
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binascii.a2b_qp("", **{1:1})
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except TypeError:
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pass
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else:
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self.fail("binascii.a2b_qp(**{1:1}) didn't raise TypeError")
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self.assertEqual(binascii.a2b_qp("= "), "= ")
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self.assertEqual(binascii.a2b_qp("=="), "=")
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self.assertEqual(binascii.a2b_qp("=AX"), "=AX")
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self.assertRaises(TypeError, binascii.b2a_qp, foo="bar")
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self.assertEqual(binascii.a2b_qp("=00\r\n=00"), "\x00\r\n\x00")
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self.assertEqual(
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binascii.b2a_qp("\xff\r\n\xff\n\xff"),
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"=FF\r\n=FF\r\n=FF"
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)
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self.assertEqual(
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binascii.b2a_qp("0"*75+"\xff\r\n\xff\r\n\xff"),
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"0"*75+"=\r\n=FF\r\n=FF\r\n=FF"
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)
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self.assertEqual(binascii.b2a_qp('\0\n'), '=00\n')
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self.assertEqual(binascii.b2a_qp('\0\n', quotetabs=True), '=00\n')
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self.assertEqual(binascii.b2a_qp('foo\tbar\t\n'), 'foo\tbar=09\n')
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self.assertEqual(binascii.b2a_qp('foo\tbar\t\n', quotetabs=True), 'foo=09bar=09\n')
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self.assertEqual(binascii.b2a_qp('.'), '=2E')
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self.assertEqual(binascii.b2a_qp('.\n'), '=2E\n')
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self.assertEqual(binascii.b2a_qp('a.\n'), 'a.\n')
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def test_empty_string(self):
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# A test for SF bug #1022953. Make sure SystemError is not raised.
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empty = self.type2test('')
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for func in all_functions:
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if func == 'crc_hqx':
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# crc_hqx needs 2 arguments
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binascii.crc_hqx(empty, 0)
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continue
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f = getattr(binascii, func)
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try:
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f(empty)
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except Exception, err:
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self.fail("{}({!r}) raises {!r}".format(func, empty, err))
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class ArrayBinASCIITest(BinASCIITest):
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def type2test(self, s):
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return array.array('c', s)
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class BytearrayBinASCIITest(BinASCIITest):
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type2test = bytearray
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class MemoryviewBinASCIITest(BinASCIITest):
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type2test = memoryview
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def test_main():
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test_support.run_unittest(BinASCIITest,
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ArrayBinASCIITest,
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BytearrayBinASCIITest,
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MemoryviewBinASCIITest)
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if __name__ == "__main__":
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test_main()
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