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cpython/Lib/test/test_base64.py

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import unittest
from test import support
import base64
import binascii
import os
import sys
import subprocess
class LegacyBase64TestCase(unittest.TestCase):
def test_encodebytes(self):
eq = self.assertEqual
eq(base64.encodebytes(b"www.python.org"), b"d3d3LnB5dGhvbi5vcmc=\n")
eq(base64.encodebytes(b"a"), b"YQ==\n")
eq(base64.encodebytes(b"ab"), b"YWI=\n")
eq(base64.encodebytes(b"abc"), b"YWJj\n")
eq(base64.encodebytes(b""), b"")
eq(base64.encodebytes(b"abcdefghijklmnopqrstuvwxyz"
b"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
b"0123456789!@#0^&*();:<>,. []{}"),
b"YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXpBQkNE"
b"RUZHSElKS0xNTk9QUVJTVFVWV1hZWjAxMjM0\nNT"
b"Y3ODkhQCMwXiYqKCk7Ojw+LC4gW117fQ==\n")
# Non-bytes
eq(base64.encodebytes(bytearray(b'abc')), b'YWJj\n')
self.assertRaises(TypeError, base64.encodebytes, "")
def test_decodebytes(self):
eq = self.assertEqual
eq(base64.decodebytes(b"d3d3LnB5dGhvbi5vcmc=\n"), b"www.python.org")
eq(base64.decodebytes(b"YQ==\n"), b"a")
eq(base64.decodebytes(b"YWI=\n"), b"ab")
eq(base64.decodebytes(b"YWJj\n"), b"abc")
eq(base64.decodebytes(b"YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXpBQkNE"
b"RUZHSElKS0xNTk9QUVJTVFVWV1hZWjAxMjM0\nNT"
b"Y3ODkhQCMwXiYqKCk7Ojw+LC4gW117fQ==\n"),
b"abcdefghijklmnopqrstuvwxyz"
b"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
b"0123456789!@#0^&*();:<>,. []{}")
eq(base64.decodebytes(b''), b'')
# Non-bytes
eq(base64.decodebytes(bytearray(b'YWJj\n')), b'abc')
self.assertRaises(TypeError, base64.decodebytes, "")
def test_encode(self):
eq = self.assertEqual
from io import BytesIO, StringIO
infp = BytesIO(b'abcdefghijklmnopqrstuvwxyz'
b'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
b'0123456789!@#0^&*();:<>,. []{}')
outfp = BytesIO()
base64.encode(infp, outfp)
eq(outfp.getvalue(),
b'YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXpBQkNE'
b'RUZHSElKS0xNTk9QUVJTVFVWV1hZWjAxMjM0\nNT'
b'Y3ODkhQCMwXiYqKCk7Ojw+LC4gW117fQ==\n')
# Non-binary files
self.assertRaises(TypeError, base64.encode, StringIO('abc'), BytesIO())
self.assertRaises(TypeError, base64.encode, BytesIO(b'abc'), StringIO())
self.assertRaises(TypeError, base64.encode, StringIO('abc'), StringIO())
def test_decode(self):
from io import BytesIO, StringIO
infp = BytesIO(b'd3d3LnB5dGhvbi5vcmc=')
outfp = BytesIO()
base64.decode(infp, outfp)
self.assertEqual(outfp.getvalue(), b'www.python.org')
# Non-binary files
self.assertRaises(TypeError, base64.encode, StringIO('YWJj\n'), BytesIO())
self.assertRaises(TypeError, base64.encode, BytesIO(b'YWJj\n'), StringIO())
self.assertRaises(TypeError, base64.encode, StringIO('YWJj\n'), StringIO())
class BaseXYTestCase(unittest.TestCase):
def test_b64encode(self):
eq = self.assertEqual
# Test default alphabet
eq(base64.b64encode(b"www.python.org"), b"d3d3LnB5dGhvbi5vcmc=")
eq(base64.b64encode(b'\x00'), b'AA==')
eq(base64.b64encode(b"a"), b"YQ==")
eq(base64.b64encode(b"ab"), b"YWI=")
eq(base64.b64encode(b"abc"), b"YWJj")
eq(base64.b64encode(b""), b"")
eq(base64.b64encode(b"abcdefghijklmnopqrstuvwxyz"
b"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
b"0123456789!@#0^&*();:<>,. []{}"),
b"YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXpBQkNE"
b"RUZHSElKS0xNTk9QUVJTVFVWV1hZWjAxMjM0NT"
b"Y3ODkhQCMwXiYqKCk7Ojw+LC4gW117fQ==")
# Test with arbitrary alternative characters
eq(base64.b64encode(b'\xd3V\xbeo\xf7\x1d', altchars=b'*$'), b'01a*b$cd')
# Non-bytes
eq(base64.b64encode(bytearray(b'abcd')), b'YWJjZA==')
eq(base64.b64encode(b'\xd3V\xbeo\xf7\x1d', altchars=bytearray(b'*$')),
b'01a*b$cd')
# Check if passing a str object raises an error
self.assertRaises(TypeError, base64.b64encode, "")
self.assertRaises(TypeError, base64.b64encode, b"", altchars="")
# Test standard alphabet
eq(base64.standard_b64encode(b"www.python.org"), b"d3d3LnB5dGhvbi5vcmc=")
eq(base64.standard_b64encode(b"a"), b"YQ==")
eq(base64.standard_b64encode(b"ab"), b"YWI=")
eq(base64.standard_b64encode(b"abc"), b"YWJj")
eq(base64.standard_b64encode(b""), b"")
eq(base64.standard_b64encode(b"abcdefghijklmnopqrstuvwxyz"
b"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
b"0123456789!@#0^&*();:<>,. []{}"),
b"YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXpBQkNE"
b"RUZHSElKS0xNTk9QUVJTVFVWV1hZWjAxMjM0NT"
b"Y3ODkhQCMwXiYqKCk7Ojw+LC4gW117fQ==")
# Non-bytes
eq(base64.standard_b64encode(bytearray(b'abcd')), b'YWJjZA==')
# Check if passing a str object raises an error
self.assertRaises(TypeError, base64.standard_b64encode, "")
# Test with 'URL safe' alternative characters
eq(base64.urlsafe_b64encode(b'\xd3V\xbeo\xf7\x1d'), b'01a-b_cd')
# Non-bytes
eq(base64.urlsafe_b64encode(bytearray(b'\xd3V\xbeo\xf7\x1d')), b'01a-b_cd')
# Check if passing a str object raises an error
self.assertRaises(TypeError, base64.urlsafe_b64encode, "")
def test_b64decode(self):
eq = self.assertEqual
tests = {b"d3d3LnB5dGhvbi5vcmc=": b"www.python.org",
b'AA==': b'\x00',
b"YQ==": b"a",
b"YWI=": b"ab",
b"YWJj": b"abc",
b"YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXpBQkNE"
b"RUZHSElKS0xNTk9QUVJTVFVWV1hZWjAxMjM0\nNT"
b"Y3ODkhQCMwXiYqKCk7Ojw+LC4gW117fQ==":
b"abcdefghijklmnopqrstuvwxyz"
b"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
b"0123456789!@#0^&*();:<>,. []{}",
b'': b'',
}
for data, res in tests.items():
eq(base64.b64decode(data), res)
eq(base64.b64decode(data.decode('ascii')), res)
# Non-bytes
eq(base64.b64decode(bytearray(b"YWJj")), b"abc")
# Test with arbitrary alternative characters
tests_altchars = {(b'01a*b$cd', b'*$'): b'\xd3V\xbeo\xf7\x1d',
}
for (data, altchars), res in tests_altchars.items():
data_str = data.decode('ascii')
altchars_str = altchars.decode('ascii')
eq(base64.b64decode(data, altchars=altchars), res)
eq(base64.b64decode(data_str, altchars=altchars), res)
eq(base64.b64decode(data, altchars=altchars_str), res)
eq(base64.b64decode(data_str, altchars=altchars_str), res)
# Test standard alphabet
for data, res in tests.items():
eq(base64.standard_b64decode(data), res)
eq(base64.standard_b64decode(data.decode('ascii')), res)
# Non-bytes
eq(base64.standard_b64decode(bytearray(b"YWJj")), b"abc")
# Test with 'URL safe' alternative characters
tests_urlsafe = {b'01a-b_cd': b'\xd3V\xbeo\xf7\x1d',
b'': b'',
}
for data, res in tests_urlsafe.items():
eq(base64.urlsafe_b64decode(data), res)
eq(base64.urlsafe_b64decode(data.decode('ascii')), res)
# Non-bytes
eq(base64.urlsafe_b64decode(bytearray(b'01a-b_cd')), b'\xd3V\xbeo\xf7\x1d')
def test_b64decode_padding_error(self):
self.assertRaises(binascii.Error, base64.b64decode, b'abc')
self.assertRaises(binascii.Error, base64.b64decode, 'abc')
def test_b64decode_invalid_chars(self):
# issue 1466065: Test some invalid characters.
tests = ((b'%3d==', b'\xdd'),
(b'$3d==', b'\xdd'),
(b'[==', b''),
(b'YW]3=', b'am'),
(b'3{d==', b'\xdd'),
(b'3d}==', b'\xdd'),
(b'@@', b''),
(b'!', b''),
(b'YWJj\nYWI=', b'abcab'))
for bstr, res in tests:
self.assertEqual(base64.b64decode(bstr), res)
self.assertEqual(base64.b64decode(bstr.decode('ascii')), res)
with self.assertRaises(binascii.Error):
base64.b64decode(bstr, validate=True)
with self.assertRaises(binascii.Error):
base64.b64decode(bstr.decode('ascii'), validate=True)
def test_b32encode(self):
eq = self.assertEqual
eq(base64.b32encode(b''), b'')
eq(base64.b32encode(b'\x00'), b'AA======')
eq(base64.b32encode(b'a'), b'ME======')
eq(base64.b32encode(b'ab'), b'MFRA====')
eq(base64.b32encode(b'abc'), b'MFRGG===')
eq(base64.b32encode(b'abcd'), b'MFRGGZA=')
eq(base64.b32encode(b'abcde'), b'MFRGGZDF')
# Non-bytes
eq(base64.b32encode(bytearray(b'abcd')), b'MFRGGZA=')
self.assertRaises(TypeError, base64.b32encode, "")
def test_b32decode(self):
eq = self.assertEqual
tests = {b'': b'',
b'AA======': b'\x00',
b'ME======': b'a',
b'MFRA====': b'ab',
b'MFRGG===': b'abc',
b'MFRGGZA=': b'abcd',
b'MFRGGZDF': b'abcde',
}
for data, res in tests.items():
eq(base64.b32decode(data), res)
eq(base64.b32decode(data.decode('ascii')), res)
# Non-bytes
eq(base64.b32decode(bytearray(b'MFRGG===')), b'abc')
def test_b32decode_casefold(self):
eq = self.assertEqual
tests = {b'': b'',
b'ME======': b'a',
b'MFRA====': b'ab',
b'MFRGG===': b'abc',
b'MFRGGZA=': b'abcd',
b'MFRGGZDF': b'abcde',
# Lower cases
b'me======': b'a',
b'mfra====': b'ab',
b'mfrgg===': b'abc',
b'mfrggza=': b'abcd',
b'mfrggzdf': b'abcde',
}
for data, res in tests.items():
eq(base64.b32decode(data, True), res)
eq(base64.b32decode(data.decode('ascii'), True), res)
self.assertRaises(binascii.Error, base64.b32decode, b'me======')
self.assertRaises(binascii.Error, base64.b32decode, 'me======')
# Mapping zero and one
eq(base64.b32decode(b'MLO23456'), b'b\xdd\xad\xf3\xbe')
eq(base64.b32decode('MLO23456'), b'b\xdd\xad\xf3\xbe')
map_tests = {(b'M1023456', b'L'): b'b\xdd\xad\xf3\xbe',
(b'M1023456', b'I'): b'b\x1d\xad\xf3\xbe',
}
for (data, map01), res in map_tests.items():
data_str = data.decode('ascii')
map01_str = map01.decode('ascii')
eq(base64.b32decode(data, map01=map01), res)
eq(base64.b32decode(data_str, map01=map01), res)
eq(base64.b32decode(data, map01=map01_str), res)
eq(base64.b32decode(data_str, map01=map01_str), res)
self.assertRaises(binascii.Error, base64.b32decode, data)
self.assertRaises(binascii.Error, base64.b32decode, data_str)
def test_b32decode_error(self):
for data in [b'abc', b'ABCDEF==', b'==ABCDEF']:
with self.assertRaises(binascii.Error):
base64.b32decode(data)
with self.assertRaises(binascii.Error):
base64.b32decode(data.decode('ascii'))
def test_b16encode(self):
eq = self.assertEqual
eq(base64.b16encode(b'\x01\x02\xab\xcd\xef'), b'0102ABCDEF')
eq(base64.b16encode(b'\x00'), b'00')
# Non-bytes
eq(base64.b16encode(bytearray(b'\x01\x02\xab\xcd\xef')), b'0102ABCDEF')
self.assertRaises(TypeError, base64.b16encode, "")
def test_b16decode(self):
eq = self.assertEqual
eq(base64.b16decode(b'0102ABCDEF'), b'\x01\x02\xab\xcd\xef')
eq(base64.b16decode('0102ABCDEF'), b'\x01\x02\xab\xcd\xef')
eq(base64.b16decode(b'00'), b'\x00')
eq(base64.b16decode('00'), b'\x00')
# Lower case is not allowed without a flag
self.assertRaises(binascii.Error, base64.b16decode, b'0102abcdef')
self.assertRaises(binascii.Error, base64.b16decode, '0102abcdef')
# Case fold
eq(base64.b16decode(b'0102abcdef', True), b'\x01\x02\xab\xcd\xef')
eq(base64.b16decode('0102abcdef', True), b'\x01\x02\xab\xcd\xef')
# Non-bytes
eq(base64.b16decode(bytearray(b"0102ABCDEF")), b'\x01\x02\xab\xcd\xef')
def test_decode_nonascii_str(self):
decode_funcs = (base64.b64decode,
base64.standard_b64decode,
base64.urlsafe_b64decode,
base64.b32decode,
base64.b16decode)
for f in decode_funcs:
self.assertRaises(ValueError, f, 'with non-ascii \xcb')
def test_ErrorHeritage(self):
self.assertTrue(issubclass(binascii.Error, ValueError))
class TestMain(unittest.TestCase):
def tearDown(self):
if os.path.exists(support.TESTFN):
os.unlink(support.TESTFN)
def get_output(self, *args, **options):
args = (sys.executable, '-m', 'base64') + args
return subprocess.check_output(args, **options)
def test_encode_decode(self):
output = self.get_output('-t')
self.assertSequenceEqual(output.splitlines(), (
b"b'Aladdin:open sesame'",
br"b'QWxhZGRpbjpvcGVuIHNlc2FtZQ==\n'",
b"b'Aladdin:open sesame'",
))
def test_encode_file(self):
with open(support.TESTFN, 'wb') as fp:
fp.write(b'a\xffb\n')
output = self.get_output('-e', support.TESTFN)
self.assertEqual(output.rstrip(), b'Yf9iCg==')
with open(support.TESTFN, 'rb') as fp:
output = self.get_output('-e', stdin=fp)
self.assertEqual(output.rstrip(), b'Yf9iCg==')
def test_decode(self):
with open(support.TESTFN, 'wb') as fp:
fp.write(b'Yf9iCg==')
output = self.get_output('-d', support.TESTFN)
self.assertEqual(output.rstrip(), b'a\xffb')
def test_main():
support.run_unittest(__name__)
if __name__ == '__main__':
test_main()
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