Structure coverage testing technology and program complexity is discussed, and the code coverage technology based on decision to decision path (DD-path) is studied.
讨论了结构覆盖测试技术和程序复杂度，研究了基于决策到决策路径(DD -路径)的代码覆盖技术。
Path coverage is a kind of important standard that investigates the sufficiency of software testing, it requires that every branch in a program should be performed at least once.
路径覆盖是考察软件测试充分性的一种重要准则，它使程序的每个分支至少执行一次。
Path coverage is inclined to be achieved in real testing activities.
实际测试活动中，往往要求能达到一定程度的路径覆盖。
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