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Add test_flufl.py from Cpython v3.11.2 #4824

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Add test_flufl.py from Cpython v3.11.2 #4824

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44 changes: 44 additions & 0 deletions Lib/test/test_flufl.py
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Original file line number Diff line number Diff line change
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import __future__
import unittest
from test import support


class FLUFLTests(unittest.TestCase):

# TODO: RUSTPYTHON
@unittest.expectedFailure
def test_barry_as_bdfl(self):
code = "from __future__ import barry_as_FLUFL\n2 {0} 3"
compile(code.format('<>'), '<BDFL test>', 'exec',
__future__.CO_FUTURE_BARRY_AS_BDFL)
with self.assertRaises(SyntaxError) as cm:
compile(code.format('!='), '<FLUFL test>', 'exec',
__future__.CO_FUTURE_BARRY_AS_BDFL)
self.assertRegex(str(cm.exception),
"with Barry as BDFL, use '<>' instead of '!='")
self.assertIn('2 != 3', cm.exception.text)
self.assertEqual(cm.exception.filename, '<FLUFL test>')

self.assertEqual(cm.exception.lineno, 2)
# The old parser reports the end of the token and the new
# parser reports the start of the token
self.assertEqual(cm.exception.offset, 3)

# TODO: RUSTPYTHON
@unittest.expectedFailure
def test_guido_as_bdfl(self):
code = '2 {0} 3'
compile(code.format('!='), '<BDFL test>', 'exec')
with self.assertRaises(SyntaxError) as cm:
compile(code.format('<>'), '<FLUFL test>', 'exec')
self.assertRegex(str(cm.exception), "invalid syntax")
self.assertIn('2 <> 3', cm.exception.text)
self.assertEqual(cm.exception.filename, '<FLUFL test>')
self.assertEqual(cm.exception.lineno, 1)
# The old parser reports the end of the token and the new
# parser reports the start of the token
self.assertEqual(cm.exception.offset, 3)


if __name__ == '__main__':
unittest.main()