{"ScriptPreparationCode":"var test_element = document.getElementById(\u0022foo\u0022);\r\nif (Math.random() \u003C 0.5) { test_element.classList.add(\u0027scrolling\u0027); }","TestCases":[{"Name":"contains \u002B add","Code":"if (!test_element.classList.contains(\u0027scrolling\u0027)) {\r\n test_element.classList.add(\u0027scrolling\u0027);\r\n}","IsDeferred":false},{"Name":"add only","Code":"test_element.classList.add(\u0027scrolling\u0027);","IsDeferred":false}]}