Mat class in JS

const test = (title, condition) => {
    const messageTest = condition ? 'Ok' : 'Error'

    console.log(title, messageTest)
}

class Mat {

    static addition(value1, value2) {
        return value1 + value2
    }

    static subtraction(value1, value2) {
        return value1 - value2
    }

    static multiplication(value1, value2) {
        return value1 * value2
    }

    static division(value1, value2) {
        return value1 / value2
    }

    static rest(value1, value2) {
        return value1 % value2
    }

    static pow(value1, value2) {
        let result = 1
        for (let i = 1; i <= value2; i++) {
            result *= value1
        }

        return result
    }

    static lcm(value1, value2) {
        let greater, lcm
        if (value1 > value2)
            greater = value1
        else
            greater = value2

        while (true) {
            if ((greater % value1 === 0) && (greater % value2 === 0)) {
                lcm = greater
                break
            }
            greater += 1
        }

        return lcm
    }

    static gcd(value1, value2) {
        let gcd = 1
        for (let i = 1; i <= value1 && i <= value2; i++) {
            if (value1 % i === 0 && value2 % i === 0) {
                gcd = i;
            }
        }

        return gcd;
    }

}

console.log("Running tests....")
test("addition", Mat.addition(1, 1) === 2)
test("subtraction", Mat.subtraction(1, 1) === 0)
test("multiplication", Mat.multiplication(1, 1) === 1)
test("division", Mat.division(4, 2) === 2)
test("pow", Mat.pow(2, 2) === 4)
test("lcm", Mat.lcm(12, 83) === 996)
test("gcd", Mat.gcd(20, 8) === 4)