text: var func = require('../src/two-sum');
  var assert = require('assert');
  describe('two-sum', function () {
      describe('#twoSum()', function () {
          it('should return [0, 1] when nums is [2, 7, 11, 15] and target is 9', function () {
              var result = func([2, 7, 11, 15], 9);
              assert.deepEqual([0, 1], result);
          });
      });
  });