中文摘要：

面向对象程序中的类是测试的基本单元,采用数据流测试技术,改进了原有生成类的调用控制流图算法,生成扩展的类控制流图（ECCFG）,实现了对于类中方法内、方法间、类内部以及类间定义--使用对的分析,有效地解决了由于面向对象程序的继承性,导致的此前研究中对于单一类测试的覆盖率不足的问题.

英文摘要：

Class is the basic unit to object-oriented program testing.On the basis of data-flow testing,an expended class control flow graph（ECCFG）was introduced in this paper,it improved class control flow graph algorithm to analysis the def-use pairs in intra-method,inter-method,intra-class and inter-class,which effectively solved the problem of inadequate coverage caused by focusing on single class testing and ignoring the inheritance of objectoriented program.