Added some unit tests for JSON sanitizing
Added some unit tests for JSON sanitizing

jayphelps/jsoneditor,cesarmarinhorj/jsoneditor,josdejong/jsoneditor,imkevinyang/jsoneditor,shuai959980629/jsoneditor,toanalien/jsoneditor,toanalien/jsoneditor,2947721120/jsoneditor,dbirchak/jsoneditor,2947721120/jsoneditor,mef/jsoneditor,2947721120/jsoneditor,cesarmarinhorj/jsoneditor,mcanthony/jsoneditor,cobblers-children/jsoneditor,shuai959980629/jsoneditor,liukd/jsoneditor,jayphelps/jsoneditor,cesarmarinhorj/jsoneditor,DavidGarciaCat/JSON-Editor-Online,DavidGarciaCat/JSON-Editor-Online,cobblers-children/jsoneditor,liukd/jsoneditor,mef/jsoneditor,josdejong/jsoneditor,shuai959980629/jsoneditor,mef/jsoneditor,amitdesai03/jsoneditor,dbirchak/jsoneditor,jayphelps/jsoneditor,amitdesai03/jsoneditor,imkevinyang/jsoneditor,mcanthony/jsoneditor,cobblers-children/jsoneditor,dbirchak/jsoneditor,mcanthony/jsoneditor,amitdesai03/jsoneditor,liukd/jsoneditor,toanalien/jsoneditor,imkevinyang/jsoneditor