JSTests/stress/regexp-max-size.js

function testMaxRegExp() {
    let patt = 'A{4294967294}X';
    const re = RegExp(patt);
    return "AAX".match(re);
}

function testTooBigRegExp() {
    let patt = 'A{4294967295}X';
    const re = RegExp(patt);
    return "AAX".match(re);
}

function testMaxBMPRegExp() {
    let patt = '\u{1234}{4294967294}X';
    const re = RegExp(patt, 'u');
    return "\u{1234}\u{1234}X".match(re);
}

function testTooBigBMPRegExp() {
    let patt = '\u{1234}{4294967295}\u{4567}';
    const re = RegExp(patt, 'u');
    return "\u{1234}\u{1234}\u{4567}".match(re);
}

function testMaxNonBMPRegExp() {
    let patt = '\u{10234}{2147483646}\u{10100}';
    const re = RegExp(patt, 'u');
    return "\u{10234}\u{10234}\u{10100}".match(re);
}

function testTooBigNonBMPRegExp() {
    let patt = '\u{10234}{2147483647}\u{10100}';
    const re = RegExp(patt, 'u');
    return "\u{10234}\u{10234}\u{10100}".match(re);
}

let shouldCompile = [testMaxRegExp, testMaxBMPRegExp, testMaxNonBMPRegExp];
let shouldntCompile = [testTooBigRegExp, testTooBigBMPRegExp, testTooBigNonBMPRegExp];

function testAll()
{
    for (let i = 0; i < shouldCompile.length; ++i) {
        if (shouldCompile[i]())
            throw "This RegExp: " + shouldCompile[i] + " should compile and fail to match";
    }

    for (let i = 0; i < shouldntCompile.length; ++i) {
        let notSyntaxError = false;

        try {
            shouldntCompile[i]();
            notSyntaxError = true;
        } catch(e) {
            if (!(e instanceof SyntaxError))
                notSyntaxError = true;
        }

        if (notSyntaxError)
            throw "This RegExp: " + shouldntCompile[i] + " should throw a Syntax Error when it is compiled";
    }
}

testAll();