Research on automatic generating test case method based on UML activity diagram

Based on UML activity diagram,the system test method was described.Aiming at activity diagram semi-formal speciality,the activity diagram formal specification and the definition of test coverage rules were given. Then the permutation of intercurrent activity was analyzed. The interactive method between tester and computer enhanced the restriction of arithmetic on generating test scenario, reduced the number of testing scenario, promoted the feasibility of automatic generating test case. At last,how to get test case from test scenario was discussed. Thereby automatic generating test case from UML activity diagram became systemic, feasible and effective.