Abstract: The existing testing approaches for web application testing can takes long time to generate test suites. So that the User Session Based Testing has introduced which is depends on capturing and replaying user sessions of a website. It is an effective testing methodology for web applications. Previous studies have exposed that the testing suites generated by user session based testing frequently find the faults neglected by other testing approaches. This paper addresses the problem and discussing different techniques and methodologies have been proposed for taking care of their issues. Genetic Algorithm (GA) is one such form of evolutionary algorithms which is the area of research. In this paper we discuss the algorithms based on genetic algorithm and in future we will try to resolve its problem.