1var assert = require('assert');
2
3function sumOfPrimes(n) {
4  const numsLessThanN = Array.from({ length: n + 1 }, function (val, idx) {
5    return idx;
6  }).slice(2);
7
8  const primes = numsLessThanN.filter((num) => {
9    let primeCandidate = num - 1;
10
11    while (primeCandidate > 1 && primeCandidate >= Math.sqrt(num)) {
12      if (num % primeCandidate === 0) return false;
13      primeCandidate--;
14    }
15
16    return true;
17  });
18
19  return primes.reduce((prime1, prime2) => prime1 + prime2);
20}
21
22try {
23  assert.deepEqual(2, sumOfPrimes(2), 'sumOfPrimes(2) should equal 2');
24
25  console.log('PASSED: ' + '`sumOfPrimes(2)` should equal `2`');
26} catch (err) {
27  console.log(err);
28}
29
30try {
31  assert.deepEqual(129, sumOfPrimes(30), 'sumOfPrimes(30) should equal 129');
32
33  console.log('PASSED: ' + '`sumOfPrimes(30)` should equal `129`');
34} catch (err) {
35  console.log(err);
36}
37
38try {
39  assert.deepEqual(381, sumOfPrimes(55), 'sumOfPrimes(55) should equal 381');
40
41  console.log('PASSED: ' + '`sumOfPrimes(55)` should equal `381`');
42} catch (err) {
43  console.log(err);
44}