text: var accumulate = require('./accumulate');
  
  describe('accumulate()', function () {
    it('accumulation empty', function () {
      var accumulator = function (e) { return e * e; };
      expect(accumulate([], accumulator)).toEqual([]);
    });
  
    xit('accumulate squares', function () {
      var accumulator = function (number) {
        return number * number;
      };
  
      var result = accumulate([1, 2, 3], accumulator);
  
      expect(result).toEqual([1, 4, 9]);
    });
  
    xit('accumulate upcases', function () {
      var accumulator = function (word) {
        return word.toUpperCase();
      };
  
      var result = accumulate('hello world'.split(/\s/), accumulator);
  
      expect(result).toEqual(['HELLO', 'WORLD']);
    });
  
    xit('accumulate reversed strings', function () {
      var accumulator = function (word) {
        return word.split('').reverse().join('');
      };
  
      var result = accumulate('the quick brown fox etc'.split(/\s/), accumulator);
  
      expect(result).toEqual(['eht', 'kciuq', 'nworb', 'xof', 'cte']);
    });
  
    xit('accumulate recursively', function () {
      var result = accumulate('a b c'.split(/\s/), function (char) {
        return accumulate('1 2 3'.split(/\s/), function (digit) {
          return char + digit;
        });
      });
  
      expect(result).toEqual([['a1', 'a2', 'a3'], ['b1', 'b2', 'b3'], ['c1', 'c2', 'c3']]);
    });
  });
  