1var assert = require('assert');
2
3function powerOfThree(num) {
4  let currentQuotient = num;
5  if (currentQuotient === 1) {
6    return true;
7  }
8  while (currentQuotient > 0) {
9    currentQuotient = currentQuotient / 3;
10    if (currentQuotient === 1) {
11      return true;
12    }
13  }
14  return false;
15}
16
17console.log(powerOfThree(9));
18console.log(powerOfThree(7));
19
20try {
21  assert.equal(powerOfThree(9), true);
22
23  console.log('PASSED: ' + 'powerOfThree(9) should be true');
24} catch (err) {
25  console.log(err);
26}
27
28try {
29  assert.equal(powerOfThree(7), false);
30
31  console.log('PASSED: ' + 'powerOfThree(7) should be false');
32} catch (err) {
33  console.log(err);
34}
35
36try {
37  assert.equal(powerOfThree(729), true);
38
39  console.log('PASSED: ' + 'powerOfThree(729) should be true');
40} catch (err) {
41  console.log(err);
42}