| """Test the binascii C module.""" |
| |
| from test import test_support |
| import unittest |
| import binascii |
| |
| class BinASCIITest(unittest.TestCase): |
| |
| # Create binary test data |
| data = b"The quick brown fox jumps over the lazy dog.\r\n" |
| # Be slow so we don't depend on other modules |
| data += bytes(range(256)) |
| data += b"\r\nHello world.\n" |
| |
| def test_exceptions(self): |
| # Check module exceptions |
| self.assert_(issubclass(binascii.Error, Exception)) |
| self.assert_(issubclass(binascii.Incomplete, Exception)) |
| |
| def test_functions(self): |
| # Check presence of all functions |
| funcs = [] |
| for suffix in "base64", "hqx", "uu", "hex": |
| prefixes = ["a2b_", "b2a_"] |
| if suffix == "hqx": |
| prefixes.extend(["crc_", "rlecode_", "rledecode_"]) |
| for prefix in prefixes: |
| name = prefix + suffix |
| self.assert_(hasattr(getattr(binascii, name), '__call__')) |
| self.assertRaises(TypeError, getattr(binascii, name)) |
| for name in ("hexlify", "unhexlify"): |
| self.assert_(hasattr(getattr(binascii, name), '__call__')) |
| self.assertRaises(TypeError, getattr(binascii, name)) |
| |
| def test_base64valid(self): |
| # Test base64 with valid data |
| MAX_BASE64 = 57 |
| lines = [] |
| for i in range(0, len(self.data), MAX_BASE64): |
| b = self.data[i:i+MAX_BASE64] |
| a = binascii.b2a_base64(b) |
| lines.append(a) |
| res = bytes() |
| for line in lines: |
| b = binascii.a2b_base64(line) |
| res += b |
| self.assertEqual(res, self.data) |
| |
| 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.data[i:i+MAX_BASE64] |
| a = binascii.b2a_base64(b) |
| lines.append(a) |
| |
| fillers = bytes() |
| valid = b"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789+/" |
| for i in range(256): |
| if i not in valid: |
| fillers.append(i) |
| def addnoise(line): |
| noise = fillers |
| ratio = len(line) // len(noise) |
| res = bytes() |
| while line and noise: |
| if len(line) // len(noise) > ratio: |
| c, line = line[0], line[1:] |
| else: |
| c, noise = noise[0], noise[1:] |
| res.append(c) |
| return res + noise + line |
| res = bytes() |
| for line in map(addnoise, lines): |
| b = binascii.a2b_base64(line) |
| res += b |
| self.assertEqual(res, self.data) |
| |
| # Test base64 with just invalid characters, which should return |
| # empty strings. TBD: shouldn't it raise an exception instead ? |
| self.assertEqual(binascii.a2b_base64(fillers), b'') |
| |
| def test_uu(self): |
| MAX_UU = 45 |
| lines = [] |
| for i in range(0, len(self.data), MAX_UU): |
| b = self.data[i:i+MAX_UU] |
| a = binascii.b2a_uu(b) |
| lines.append(a) |
| res = bytes() |
| for line in lines: |
| b = binascii.a2b_uu(line) |
| res += b |
| self.assertEqual(res, self.data) |
| |
| self.assertEqual(binascii.a2b_uu(b"\x7f"), b"\x00"*31) |
| self.assertEqual(binascii.a2b_uu(b"\x80"), b"\x00"*32) |
| self.assertEqual(binascii.a2b_uu(b"\xff"), b"\x00"*31) |
| self.assertRaises(binascii.Error, binascii.a2b_uu, b"\xff\x00") |
| self.assertRaises(binascii.Error, binascii.a2b_uu, b"!!!!") |
| |
| self.assertRaises(binascii.Error, binascii.b2a_uu, 46*b"!") |
| |
| def test_crc32(self): |
| crc = binascii.crc32(b"Test the CRC-32 of") |
| crc = binascii.crc32(b" this string.", crc) |
| self.assertEqual(crc, 1571220330) |
| |
| self.assertRaises(TypeError, binascii.crc32) |
| |
| # The hqx test is in test_binhex.py |
| |
| def test_hex(self): |
| # test hexlification |
| s = b'{s\005\000\000\000worldi\002\000\000\000s\005\000\000\000helloi\001\000\000\0000' |
| t = binascii.b2a_hex(s) |
| u = binascii.a2b_hex(t) |
| self.assertEqual(s, u) |
| self.assertRaises(binascii.Error, binascii.a2b_hex, t[:-1]) |
| self.assertRaises(binascii.Error, binascii.a2b_hex, t[:-1] + b'q') |
| |
| self.assertEqual(binascii.hexlify('a'), b'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(b"= "), b"= ") |
| self.assertEqual(binascii.a2b_qp(b"=="), b"=") |
| self.assertEqual(binascii.a2b_qp(b"=AX"), b"=AX") |
| self.assertRaises(TypeError, binascii.b2a_qp, foo="bar") |
| self.assertEqual(binascii.a2b_qp(b"=00\r\n=00"), b"\x00\r\n\x00") |
| self.assertEqual( |
| binascii.b2a_qp(b"\xff\r\n\xff\n\xff"), |
| b"=FF\r\n=FF\r\n=FF" |
| ) |
| self.assertEqual( |
| binascii.b2a_qp(b"0"*75+b"\xff\r\n\xff\r\n\xff"), |
| b"0"*75+b"=\r\n=FF\r\n=FF\r\n=FF" |
| ) |
| |
| self.assertEqual(binascii.b2a_qp(b'\0\n'), b'=00\n') |
| self.assertEqual(binascii.b2a_qp(b'\0\n', quotetabs=True), b'=00\n') |
| self.assertEqual(binascii.b2a_qp(b'foo\tbar\t\n'), b'foo\tbar=09\n') |
| self.assertEqual(binascii.b2a_qp(b'foo\tbar\t\n', quotetabs=True), |
| b'foo=09bar=09\n') |
| |
| self.assertEqual(binascii.b2a_qp(b'.'), b'=2E') |
| self.assertEqual(binascii.b2a_qp(b'.\n'), b'=2E\n') |
| self.assertEqual(binascii.b2a_qp(b'a.\n'), b'a.\n') |
| |
| def test_empty_string(self): |
| # A test for SF bug #1022953. Make sure SystemError is not raised. |
| for n in ['b2a_qp', 'a2b_hex', 'b2a_base64', 'a2b_uu', 'a2b_qp', |
| 'b2a_hex', 'unhexlify', 'hexlify', 'crc32', 'b2a_hqx', |
| 'a2b_hqx', 'a2b_base64', 'rlecode_hqx', 'b2a_uu', |
| 'rledecode_hqx']: |
| f = getattr(binascii, n) |
| try: |
| f(b'') |
| except SystemError as err: |
| self.fail("%s(b'') raises SystemError: %s" % (n, err)) |
| binascii.crc_hqx('', 0) |
| |
| def test_main(): |
| test_support.run_unittest(BinASCIITest) |
| |
| if __name__ == "__main__": |
| test_main() |