class nestedListWeightSum{

    // Add your code here

}

​

function tests() {

    s = new nestedListWeightSum();

    var assert = require('assert');

    let pass = 0;

​

    try {

        assert.equal(s.depthSum([[1, 1], 2, [1, 1]]), 10);

        console.log( 'Test1 - PASSED: ' + "`depthSum([[1, 1], 2, [1, 1]])` should return `10`");

        pass += 1;

    } catch (err) {

        console.log(err);

    }

​

    try {

        assert.equal(s.depthSum([1, [4, [6]]]), 27);

        console.log( 'Test2 - PASSED: ' + "`depthSum([1, [4, [6]]])` should return `27`");

        pass += 1;

    } catch (err) {

        console.log(err);

    }

​

    try {

        assert.equal(s.depthSum([0]), 0);