[英]How can I test a method which invoke protected (unwanted) methods of parent class?
I'm stuck in a very weird case.我被困在一个非常奇怪的案例中。 I have some specific code which I need to test.
我有一些需要测试的特定代码。 Here it is:
这里是:
public class A {
/*
* The real method of real class is so big that I just don't want to test it.
* That's why I use throwing an exception.
*/
protected void method(Integer result) {
throw new RuntimeException("Oops!");
}
protected <T> T generifiedMethod(String s, T type) {
throw new RuntimeException("Oops!");
}
protected void mainMethod(Integer value) {
throw new RuntimeException("Oops!");
}
}
I also have a child class:我也有一个子类:
public class B extends A {
@Override
protected void mainMethod(Integer value) {
if (value == 100500) {
Integer result = super.generifiedMethod("abc", 100);
super.method(result);
}
super.mainMethod(value);
}
}
I need to cover the child class with tests.我需要用测试来覆盖子类。
I was trying a lot of combinations with PowerMockito, but none of them can verify invocation of protected methods of parent class.我尝试了很多与 PowerMockito 的组合,但没有一个可以验证父类受保护方法的调用。 Also, I have a restriction on use only Mockito, PowerMockito and TestNG.
另外,我对仅使用 Mockito、PowerMockito 和 TestNG 有限制。
Here is my test code (one of variants):这是我的测试代码(变体之一):
@Test
public void should_invoke_parent_logic_methods_of_A_class() throws Exception {
/* Given */
A aSpy = PowerMockito.spy(new A());
PowerMockito.doReturn(250).when(aSpy, "generifiedMethod", "abc", 100);
PowerMockito.doNothing().when(aSpy, "method", 250);
PowerMockito.suppress(method(A.class, "mainMethod", Integer.class));
/* When */
aSpy.mainMethod(100500);
/* Then */
/**
* Here I need to verify invocation of all methods of class A (generifiedMethod(), method(),
* and mainMethod()). But I don't need them to be invoked because their logic is unwanted
* to be tested in case of tests for class B.
*/
}
I would be appreciate for any suggestions how to test class B. Thanks.对于如何测试 B 类的任何建议,我将不胜感激。谢谢。
Update更新
If I add into Then section this code如果我添加到Then部分此代码
Mockito.verify(aSpy, times(3)).mainMethod(100500);
Mockito.verify(aSpy, times(1)).generifiedMethod("abc", 100);
Mockito.verify(aSpy, times(1)).method(250);
It gives me the following error message:它给了我以下错误消息:
Wanted but not invoked:
a.generifiedMethod("abc", 100);
Did you consider variant to change design of your classes and use composition instead of inheritance ?您是否考虑使用变体来更改类的设计并使用组合而不是继承? Then you will be able to just mock / spy instance of class A and inject it to instance of class B. In such case you will be able to configure whatever behavior that you need.
然后,您将能够模拟/监视类 A 的实例并将其注入到类 B 的实例中。在这种情况下,您将能够配置您需要的任何行为。
I really not sure doCallRealMethod() will make trick for you, cause you have option to mock method or invoke real one, but not both simultaneously.我真的不确定 doCallRealMethod() 会为你做伎俩,因为你可以选择模拟方法或调用真正的方法,但不能同时调用。
I think you are in a case where you should not use a mock library, but revert to the old specialized stub mode. 我认为你不应该使用模拟库,而是恢复到旧的专用存根模式。
You have to create a specialized A that has the following functionnalities : 您必须创建具有以下功能的专用A:
method
, generifiedMethod
and mainMethod
have been called method
, generifiedMethod
和mainMethod
You can then construct your tests with Junit or TestNG. 然后,您可以使用Junit或TestNG构建测试。 The main problem that remain IMHO is that you probably will have to use a custom build procedure to load the A stub class and not the real A.
恕我直言的主要问题是你可能必须使用自定义构建过程来加载A存根类而不是真正的A.
If I understood you correctly, you want to test the method 'mainMethod' from class B. So, you should mock an object from class B, and not one from class A. Try this:如果我理解正确,您想测试 B 类中的方法“mainMethod”。因此,您应该模拟 B 类中的对象,而不是 A 类中的对象。试试这个:
/* Given */
B b = Mockito.mock(B.class);
//use this to skip the method execution
Mockito.doNothing().when(b).generifiedMethod(Mockito.anyString(), Mockito.any());
Mockito.doNothing().when(b).method(Mockito.anyInt());
//or use this to return whatever you want when the methods are called
Mockito.doReturn(new Object()).when(b).method(Mockito.anyInt());
Mockito.doReturn(new Object()).when(b).generifiedMethod(Mockito.anyString(), Mockito.any());
Then you can call the mainMethod from B, already knowing what the other methods will return.然后你可以从 B 调用 mainMethod,已经知道其他方法将返回什么。
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