java 如何抑制和验证私有静态方法调用？
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How to suppress and verify private static method calls?
提问by Malvin
I am currently stumbling in JUnit testing and need some help. So I got this class with static methods which will refactor some objects. For simplification's sake I have made a small example. This is my Factory class:
我目前在 JUnit 测试中遇到困难，需要一些帮助。所以我用静态方法得到了这个类，它会重构一些对象。为了简单起见，我做了一个小例子。这是我的工厂类：
class Factory {
public static String factorObject() throws Exception {
String s = "Hello Mary Lou";
checkString(s);
return s;
}
private static void checkString(String s) throws Exception {
throw new Exception();
}
}
And this is my Test class:
这是我的测试类：
@RunWith(PowerMockRunner.class)
@PrepareForTest({ Factory.class })
public class Tests extends TestCase {
public void testFactory() throws Exception {
mockStatic(Factory.class);
suppress(method(Factory.class, "checkString"));
String s = Factory.factorObject();
assertEquals("Hello Mary Lou", s);
}
}
Basically what I tried to achieve is that the private method checkString() should be suppressed (so the Exception is not thrown), and also need to verify that the method checkString() was actually called in the method factorObject().
基本上我试图实现的是应该抑制私有方法checkString()（因此不会抛出异常），并且还需要验证方法checkString（）实际上是在方法factorObject（）中调用的。
UPDATED: The suppression works correctly with the following code:
更新：抑制与以下代码正常工作：
suppress(method(Factory.class, "checkString", String.class));
String s = Factory.factorObject();
... however it returns me NULL for the String "s". Why is that?
...但是它为字符串“s”返回NULL。这是为什么？
回答by Malvin
Ok, I finally found the solution to all problems. If anyone stumbles across similar issues here is the code:
好的，我终于找到了所有问题的解决方案。如果有人偶然发现类似的问题，这里是代码：
import junit.framework.TestCase;
import org.junit.runner.RunWith;
import org.mockito.Mockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import static org.mockito.Mockito.anyString;
import static org.mockito.Mockito.times;
import static org.powermock.api.support.membermodification.MemberModifier.suppress;
import static org.powermock.api.support.membermodification.MemberMatcher.method;
import static org.powermock.api.mockito.PowerMockito.mockStatic;
import static org.powermock.api.mockito.PowerMockito.verifyPrivate;
@RunWith(PowerMockRunner.class)
@PrepareForTest(Factory.class)
public class Tests extends TestCase {
public void testFactory() throws Exception {
mockStatic(Factory.class, Mockito.CALLS_REAL_METHODS);
suppress(method(Factory.class, "checkString", String.class));
String s = Factory.factorObject();
verifyPrivate(Factory.class, times(1)).invoke("checkString", anyString());
assertEquals("Hello Mary Lou", s);
}
}
回答by Shreyos Adikari
Yo can do it like:
你可以这样做：
PowerMockito.doNothing().when(Factory.class,"checkString");
For more details you can visit :
http://powermock.googlecode.com/svn/docs/powermock-1.3.7/apidocs/org/powermock/api/mockito/PowerMockito.html
有关更多详细信息，您可以访问：http:
//powermock.googlecode.com/svn/docs/powermock-1.3.7/apidocs/org/powermock/api/mockito/PowerMockito.html
Edit:
编辑：
ClassToTest spy = spy(new ClassToTest ());
doNothing().when(spy).methodToSkip();
spy.methodToTest();
