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【单选题】
下列关于面向对象软件测试的说法中,正确的是 ( )A.
在测试一个类时,只要对该类的每个成员方法都进行充分的测试就完成了对该类充分的测试
B.
在存在多态的情况下,为了达到较高的测试充分性,应对所有可能的绑定都进行测试
C.
假设类B是类A的子数,如果类A已进行了充分的测试,在测试类B时不必测试任何类B继承类A的成员方法
D.
对于一棵继承树上的多个类,只是处于叶节点的类需要测试
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