Abstract: Test data generation is the key of implementing software test automation, and the realization of this technology can greatly save for time and money of software development. This paper, using genetic algorithm theory and algorithm characteristics, established a test data automatic generation tool of variable parameter dynamic. Through the visual interface of the tool, you can input genetic algorithm parameters dynamically. And according to the different path selection you can input corresponding fitness function, overcome defects that fitness function is modified in the source code in the past. Finally through the two experiments,we can prove the superiority of the algorithm in this paper.

Key words: Software testing,Automatic test data generation,Visual,Genetic algorithm,Fitness function