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bpo-44873: added test cases from RFC 4648 #27747

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Aug 13, 2021
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bpo-44873: added test cases from RFC 4648 #27747

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39 changes: 39 additions & 0 deletions Lib/test/test_base64.py
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Original file line number Diff line number Diff line change
Expand Up @@ -714,6 +714,45 @@ def test_decode_nonascii_str(self):
def test_ErrorHeritage(self):
self.assertTrue(issubclass(binascii.Error, ValueError))

def test_RFC4648_test_cases(self):
# test cases from RFC 4648 section 10
b64encode = base64.b64encode
b32hexencode = base64.b32hexencode
b32encode = base64.b32encode
b16encode = base64.b16encode

self.assertEqual(b64encode(b""), b"")
self.assertEqual(b64encode(b"f"), b"Zg==")
self.assertEqual(b64encode(b"fo"), b"Zm8=")
self.assertEqual(b64encode(b"foo"), b"Zm9v")
self.assertEqual(b64encode(b"foob"), b"Zm9vYg==")
self.assertEqual(b64encode(b"fooba"), b"Zm9vYmE=")
self.assertEqual(b64encode(b"foobar"), b"Zm9vYmFy")

self.assertEqual(b32encode(b""), b"")
self.assertEqual(b32encode(b"f"), b"MY======")
self.assertEqual(b32encode(b"fo"), b"MZXQ====")
self.assertEqual(b32encode(b"foo"), b"MZXW6===")
self.assertEqual(b32encode(b"foob"), b"MZXW6YQ=")
self.assertEqual(b32encode(b"fooba"), b"MZXW6YTB")
self.assertEqual(b32encode(b"foobar"), b"MZXW6YTBOI======")

self.assertEqual(b32hexencode(b""), b"")
self.assertEqual(b32hexencode(b"f"), b"CO======")
self.assertEqual(b32hexencode(b"fo"), b"CPNG====")
self.assertEqual(b32hexencode(b"foo"), b"CPNMU===")
self.assertEqual(b32hexencode(b"foob"), b"CPNMUOG=")
self.assertEqual(b32hexencode(b"fooba"), b"CPNMUOJ1")
self.assertEqual(b32hexencode(b"foobar"), b"CPNMUOJ1E8======")

self.assertEqual(b16encode(b""), b"")
self.assertEqual(b16encode(b"f"), b"66")
self.assertEqual(b16encode(b"fo"), b"666F")
self.assertEqual(b16encode(b"foo"), b"666F6F")
self.assertEqual(b16encode(b"foob"), b"666F6F62")
self.assertEqual(b16encode(b"fooba"), b"666F6F6261")
self.assertEqual(b16encode(b"foobar"), b"666F6F626172")


class TestMain(unittest.TestCase):
def tearDown(self):
Expand Down