Method test_change_cwd__chdir_warning

Lib/test/test_support.py:311–327

Check the warning message when os.chdir() fails.

(self)

    # Tests for change_cwd()

    def test_change_cwd__chdir_warning(self):
        """Check the warning message when os.chdir() fails."""
        path = TESTFN + '_does_not_exist'
        with warnings_helper.check_warnings() as recorder, _caplog() as caplog:
            with os_helper.change_cwd(path=path, quiet=True):
                pass
            messages = [str(w.message) for w in recorder.warnings]

        self.assertListEqual(messages, [])
        self.assertEqual(len(caplog.records), 1)
        record = caplog.records[0]
        self.assertStartsWith(
            record.getMessage(),
            f'tests may fail, unable to change '
            f'the current working directory '
            f'to {path!r}: ',
        )

    # Tests for temp_cwd()