In order to overcome the shortages such as the incomplete test routes and high redundancy in traditional operating system test by using the classification tree method, this paper comes up with a flow chart method which takes the system service interface as target and is divided by the type of conformance class. It also assesses the importance of each interface. This test method can fully list all kinds of combinations of each interface in the called process. So it not only raises the rate of test coverage, but also reduces coding work via code reuse, which improves test efficiency. The outcome shows that the workload by using this method is only two-thirds of that in the traditional method.%传统OSEK/VDX操作系统测试采用分类树的测试方法,导致测试路径不完全和冗余性高.为此,提出以系统服务接口为目标的面向符合类的流框图测试方法.通过评估接口重要度,准确判断接口的各种调用组合方式,提高测试覆盖率,实现测试代码的复用,其测试工作量比原方法减少三分之一.
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