QUnit.test('should work with `orders` specified as compare functions', function(assert) {
      assert.expect(3);

      function compareStrings(a, b) { return a < b ? -1 : a > b ? 1 : 0 }
      function compareStringsDesc(a, b) { return -compareStrings(a, b) }
      function compareNumbers(a, b) { return a - b }

      var actual = _.orderBy(objects, 'a', compareStringsDesc);
      assert.deepEqual(actual, [objects[1], objects[3], objects[0], objects[2]]);

      actual = _.orderBy(objects, ['a'], [compareStringsDesc]);
      assert.deepEqual(actual, [objects[1], objects[3], objects[0], objects[2]]);

      actual = _.orderBy(objects, ['a', 'b'], [compareStringsDesc, compareNumbers]);
      assert.deepEqual(actual, [objects[3], objects[1], objects[2], objects[0]]);
    });