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