1. An information processing system that generates a test case for a web application, the system comprising: a pattern storage module for storing at least one resource identifier patterns, wherein said resource identifier patterns are extracted from a server code of a web application by analyzing said server code; a client code analyzer module for analyzing a client code generated from said server code and finding at least one event sequences matching with said resource identifier patterns; and a test case generator module for fetching a client state established from said client code, executing said event sequences on said client state, and generating a test case, wherein said test case comprises a second resource identifier generated as an execution result of said event sequence.