code: function() {
        if (!JSLitmus.currentTest) {
          var test = JSLitmus._queue.shift();
          if (test) {
            jsl.$('stop_button').disabled = false;
            JSLitmus.currentTest = test;
            test.run();
            JSLitmus.renderTest(test);
            if (JSLitmus.onTestStart) JSLitmus.onTestStart(test);
          } else {
            jsl.$('stop_button').disabled = true;
            JSLitmus.renderChart();
          }
        }
      }
docs: Run the next test in the run queue