def METHOD_NAME(self):
    examinee = notification.cfg_from_callback
    callback_file = os.path.join(self.tmp_dir.name, 'call_me')
    with open(callback_file, 'w') as f:
        f.write('#!/usr/bin/env sh\necho "foo: 42">"${NOTIFY_CFG_OUT}"')
    os.chmod(callback_file, stat.S_IEXEC | stat.S_IREAD)
    assert examinee(
        repo_root=self.tmp_dir.name,
        callback_path=callback_file,
        effective_cfg_file='no-file-yet',
    ) == {'foo':42}