code: function (data) {
      if (! data.success) {
        //var timestamp = Math.round(new Date().getTime() / 1000);
        this.xml[0].children[this.testIdx].children[this.testCount].children.push({
          name: 'failure',
          attrs: {
            name: data.type,
            message:  (data.message ? data.message : 'Expected: ' + data.expected + 'Actual: ' + data.value)
          }
        });
  
        //if (this.variationCount > -1 && this.xml[0].children[this.testIdx].children[this.testCount].children[this.variationCount]) {
          //this.xml[0].children[this.testIdx].children[this.testCount].children[this.variationCount].attrs.end = timestamp;
        //}
  
        this.variationCount++;
      }
  
      return this;
    }
docs: Generates XML skeleton for an assertion
  
  @method assertion
  @param {object} data Event data
  @chainable