Validar se numero PIS é valido

isPisValid.groovy

Closure isPisValid = { String pis ->

    final List tap = [3,2,9,8,7,6,5,4,3,2]

    String nroPis = pis.replaceAll("[^0-9]*", "").padLeft(11, '0')

    int checker = Integer.parseInt(
        String.valueOf(nroPis.charAt(nroPis.length()-1))
    )

    int total = 0
    nroPis.eachWithIndex { String chr, int i ->
        if (i < 10) total += Integer.parseInt(chr) * tap[i]
    }

    int mod = total % 11

    if (mod != 0) {
        mod = 11 - mod
    }

    if (mod in [10,11]) {
        mod = 0
    }

    return mod == checker
}

assert isPisValid('120.8585.717-7') //true
assert isPisValid('12085857177') //true
assert isPisValid('7') //false