the old parser reports the end of the token and the new parser reports the start of the token the old parser reports the end of the token and the new parser reports the start of the token the old parser reports the end of the token and the new parser reports the start of the token the old parser reports the end of the token and the new parser reports the start of the token
import __future__
import unittest


class FLUFLTests(unittest.TestCase):

    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)
        
        
        self.assertEqual(cm.exception.offset, 3)

    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)
        
        
        self.assertEqual(cm.exception.offset, 3)


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