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[3.8] bpo-37876: Tests for ROT-13 codec (GH-15314) #15786

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Merged
merged 1 commit into from
Sep 9, 2019
Merged

[3.8] bpo-37876: Tests for ROT-13 codec (GH-15314) #15786

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37 changes: 37 additions & 0 deletions Lib/test/test_codecs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3343,5 +3343,42 @@ def test_decode_unsupported_error_handler(self):
self.assertEqual(str(cm.exception), 'unsupported error handler')


class Rot13Test(unittest.TestCase):
"""Test the educational ROT-13 codec."""
def test_encode(self):
ciphertext = codecs.encode("Caesar liked ciphers", 'rot-13')
self.assertEqual(ciphertext, 'Pnrfne yvxrq pvcuref')

def test_decode(self):
plaintext = codecs.decode('Rg gh, Oehgr?', 'rot-13')
self.assertEqual(plaintext, 'Et tu, Brute?')

def test_incremental_encode(self):
encoder = codecs.getincrementalencoder('rot-13')()
ciphertext = encoder.encode('ABBA nag Cheryl Baker')
self.assertEqual(ciphertext, 'NOON ant Purely Onxre')

def test_incremental_decode(self):
decoder = codecs.getincrementaldecoder('rot-13')()
plaintext = decoder.decode('terra Ares envy tha')
self.assertEqual(plaintext, 'green Nerf rail gun')


class Rot13UtilTest(unittest.TestCase):
"""Test the ROT-13 codec via rot13 function,
i.e. the user has done something like:
$ echo "Hello World" | python -m encodings.rot_13
"""
def test_rot13_func(self):
infile = io.StringIO('Gb or, be abg gb or, gung vf gur dhrfgvba')
outfile = io.StringIO()
encodings.rot_13.rot13(infile, outfile)
outfile.seek(0)
plain_text = outfile.read()
self.assertEqual(
plain_text,
'To be, or not to be, that is the question')


if __name__ == "__main__":
unittest.main()
1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Tests/2019-08-16-16-15-14.bpo-37876.m3k1w3.rst
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@@ -0,0 +1 @@
Add tests for ROT-13 codec.