def "won't parse string with non-hex chars: #illegal"() {
        when:
        HashCode.fromString(illegal)

        then:
        thrown Exception

        where:
        illegal << ["abcdefgh", "-1235689", "0x123456"]
    }

    def "won't parse too short string: #length"() {
        when:
        HashCode.fromString("a" * length)

        then:
        thrown Exception

        where: