Abstract: To improve the efficiency of test cases design for multi-condition combination object, this paper proposes a method that uses the cause-effect expression to replace the cause-effect graph. Firstly, the syntax rules of cause-effect expression are made. Secondly, the data structure and algorithm of decision tables are determined. Finally, the test case design tool for multi-condition combination object is realized by visual design and programming. The functions of the tool include: test input editing, automatic test cases generation, test case maintenance and design process view. To compare with cause-effect graph, this method doesnt have to draw cause-effect graph, and easily generates test cases automatically, so can improve the efficiency of test case design and maintenance.
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Key words: cause-effect graph, cause-effect expression, test case, decision table, black-box testing