fun checkTrue(): Boolean {
    var hit = false
    val l = { hit = true; true }
    assert(l())
    return hit
}

fun checkTrueWithMessage(): Boolean {
    var hit = false
    val l = { hit = true; true }
    assert(l()) { "BOOYA!" }
    return hit
}

fun checkFalse(): Boolean {
    var hit = false
    val l = { hit = true; false }
    assert(l())
    return hit
}

fun checkFalseWithMessage(): Boolean {
    var hit = false
    val l = { hit = true; false }
    assert(l()) { "BOOYA!" }
    return hit
}

fun main() {
    if (!checkTrue()) error("FAIL 0")

    if (!checkTrueWithMessage()) error("FAIL 2")

    if (!checkFalse()) error("FAIL 4")

    if (!checkFalseWithMessage()) error("FAIL 6")
}