Method test_reread

Lib/test/test_mailbox.py:1003–1041

(self)

        self.assertFalse((perms & 0o111)) # Execute bits should all be off.

    def test_reread(self):
        # Do an initial unconditional refresh
        self._box._refresh()

        # Put the last modified times more than two seconds into the past
        # (because mtime may have a two second granularity)
        for subdir in ('cur', 'new'):
            os.utime(os.path.join(self._box._path, subdir),
                     (time.time()-5,)*2)

        # Because mtime has a two second granularity in worst case (FAT), a
        # refresh is done unconditionally if called for within
        # two-second-plus-a-bit of the last one, just in case the mbox has
        # changed; so now we have to wait for that interval to expire.
        #
        # Because this is a test, emulate sleeping. Instead of
        # sleeping for 2 seconds, use the skew factor to make _refresh
        # think that 2 seconds have passed and re-reading the _toc is
        # only required if mtimes differ.
        self._box._skewfactor = -3

        # Re-reading causes the ._toc attribute to be assigned a new dictionary
        # object, so we'll check that the ._toc attribute isn't a different
        # object.
        orig_toc = self._box._toc
        def refreshed():
            return self._box._toc is not orig_toc

        self._box._refresh()
        self.assertFalse(refreshed())

        # Now, write something into cur and remove it.  This changes
        # the mtime and should cause a re-read. Note that "sleep
        # emulation" is still in effect, as skewfactor is -3.
        filename = os.path.join(self._path, 'cur', 'stray-file')
        os_helper.create_empty_file(filename)
        os.unlink(filename)
        self._box._refresh()
        self.assertTrue(refreshed())


class _TestSingleFile(TestMailbox):