cpython/Lib/test/test_pep263.py

# -*- coding: koi8-r -*-

import unittest
from test import support

class PEP263Test(unittest.TestCase):

    def test_pep263(self):
        self.assertEqual(
            "<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>".encode("utf-8"),
            b'\xd0\x9f\xd0\xb8\xd1\x82\xd0\xbe\xd0\xbd'
        )
        self.assertEqual(
            "\<EFBFBD>".encode("utf-8"),
            b'\\\xd0\x9f'
        )

    def test_compilestring(self):
        # see #1882
        c = compile(b"\n# coding: utf-8\nu = '\xc3\xb3'\n", "dummy", "exec")
        d = {}
        exec(c, d)
        self.assertEqual(d['u'], '\xf3')

    def test_issue2301(self):
        try:
            compile(b"# coding: cp932\nprint '\x94\x4e'", "dummy", "exec")
        except SyntaxError as v:
            self.assertEqual(v.text, "print '\u5e74'\n")
        else:
            self.fail()

    def test_issue4626(self):
        c = compile("# coding=latin-1\n\u00c6 = '\u00c6'", "dummy", "exec")
        d = {}
        exec(c, d)
        self.assertEqual(d['\xc6'], '\xc6')

    def test_issue3297(self):
        c = compile("a, b = '\U0001010F', '\\U0001010F'", "dummy", "exec")
        d = {}
        exec(c, d)
        self.assertEqual(d['a'], d['b'])
        self.assertEqual(len(d['a']), len(d['b']))
        self.assertEqual(ascii(d['a']), ascii(d['b']))

    def test_issue7820(self):
        # Ensure that check_bom() restores all bytes in the right order if
        # check_bom() fails in pydebug mode: a buffer starts with the first
        # byte of a valid BOM, but next bytes are different

        # one byte in common with the UTF-16-LE BOM
        self.assertRaises(SyntaxError, eval, b'\xff\x20')

        # two bytes in common with the UTF-8 BOM
        self.assertRaises(SyntaxError, eval, b'\xef\xbb\x20')

    def test_error_message(self):
        compile(b'# -*- coding: iso-8859-15 -*-\n', 'dummy', 'exec')
        compile(b'\xef\xbb\xbf\n', 'dummy', 'exec')
        compile(b'\xef\xbb\xbf# -*- coding: utf-8 -*-\n', 'dummy', 'exec')
        with self.assertRaisesRegex(SyntaxError, 'fake'):
            compile(b'# -*- coding: fake -*-\n', 'dummy', 'exec')
        with self.assertRaisesRegex(SyntaxError, 'iso-8859-15'):
            compile(b'\xef\xbb\xbf# -*- coding: iso-8859-15 -*-\n',
                    'dummy', 'exec')
        with self.assertRaisesRegex(SyntaxError, 'BOM'):
            compile(b'\xef\xbb\xbf# -*- coding: iso-8859-15 -*-\n',
                    'dummy', 'exec')
        with self.assertRaisesRegex(SyntaxError, 'fake'):
            compile(b'\xef\xbb\xbf# -*- coding: fake -*-\n', 'dummy', 'exec')
        with self.assertRaisesRegex(SyntaxError, 'BOM'):
            compile(b'\xef\xbb\xbf# -*- coding: fake -*-\n', 'dummy', 'exec')


def test_main():
    support.run_unittest(PEP263Test)

if __name__=="__main__":
    test_main()