subtest "response" => sub {

subtest "empty diff" => sub {

    is($ret, {
        stillSucceed => [],
        stillFail => [],
        nowSucceed => [],
        nowFail => [],
        new => [],
        removed => [],
        unfinished => [],
        aborted => [],
        failed => [],
    });

    is(
        $ret,
        {
            stillSucceed => [],
            stillFail => [],
            nowSucceed => [],
            nowFail => [],
            new => [],
            removed => [],
            unfinished => [],
            aborted => [],
            failed => [],
        },
        "empty list of jobs returns empty diff"
    );