tests.js

var execSync = require('child_process').execSync;
var assert = require('assert');

var result = 'GOOD';
var results = {
  'input1.dat': '[450,460,470,480,490,500,510,520,530,540,6225]',
  'input2.dat': '[910,839,1120,1014,1126,900,974,866,1698,1384,10944]',
  'input3.dat': '[0,108,0,0,0,0,0,0,0,0,0]'
};

try {
  for (var input of Object.keys(results)) {
    assert.equal(results[input],execSync("node buckets.js < " + input).toString().trim());
  }
} catch (e) {
  result = 'BAD';
}

console.log(result);