使用 EasyMock+PowerMock 模拟静态方法时出现 java.lang.ExceptionInInitializerError
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java.lang.ExceptionInInitializerError when mocking static method using EasyMock+PowerMock
提问by Siddharth
I am trying to mock static method using EasyMock+PowerMock. If I dont mock the static method, then I get the exception java.lang.ExceptionInInitializerError but with a different stack trace which is purely due to my code files and the error is obvious. However, if I mock the static method using EasyMock+PowerMock, the line PowerMock.mockStaticNice(Classname.class) throws the same exception but with a different stack trace. The stack trace is:
我正在尝试使用 EasyMock+PowerMock 模拟静态方法。如果我不模拟静态方法，那么我会得到异常 java.lang.ExceptionInInitializerError 但具有不同的堆栈跟踪，这纯粹是由于我的代码文件造成的，并且错误很明显。但是，如果我使用 EasyMock+PowerMock 模拟静态方法，则 PowerMock.mockStaticNice(Classname.class) 行会抛出相同的异常，但具有不同的堆栈跟踪。堆栈跟踪是：
java.lang.ExceptionInInitializerError
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at net.sf.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:386)
at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:219)
at net.sf.cglib.proxy.Enhancer.createHelper(Enhancer.java:377)
at net.sf.cglib.proxy.Enhancer.createClass(Enhancer.java:317)
at org.easymock.internal.ClassProxyFactory.createProxy(ClassProxyFactory.java:175)
at org.easymock.internal.MocksControl.createMock(MocksControl.java:114)
at org.easymock.internal.MocksControl.createMock(MocksControl.java:88)
at org.easymock.internal.MocksControl.createMock(MocksControl.java:79)
at org.powermock.api.easymock.PowerMock.doCreateMock(PowerMock.java:2212)
at org.powermock.api.easymock.PowerMock.doMock(PowerMock.java:2163)
at org.powermock.api.easymock.PowerMock.mockStaticNice(PowerMock.java:331)
at PackageName(ClassName.java:125)
............................
The line 125 is PowerMock.mockStaticNice(Classname.class)
I have already tried this:
1) Mention class name containing static method in PrepareForTest({class1.class, class2.class, class3.class})
2) Mock static methods in @Before annotation.
I am stuck with this problem for the last 2 days. Kindly suggest solutions.
第 125 行是 PowerMock.mockStaticNice(Classname.class)
我已经试过了：
1) 在 PrepareForTest({class1.class, class2.class, class3.class}) 中提及包含静态方法的类名
2) 在@中模拟静态方法注释前。
在过去的 2 天里，我一直被这个问题困扰。请提出解决方案。
回答by Arthur Zagretdinov
As I understood from your explanation the ExceptionInInitializerErroris thrown during static initialisation of class? I've made such conclusion, because according to stacktrace the line PowerMock.mockStaticNice(Classname.class)is a first place where the class Classnameis being loaded.
正如我从你的解释中了解到的，ExceptionInInitializerError在类的静态初始化期间抛出了？我做出了这样的结论，因为根据堆栈跟踪，该行PowerMock.mockStaticNice(Classname.class)是Classname加载类的第一个位置。
In this case you have to use @SuppressStaticInitializationFor(PackageName.ClassName`). More information you may find in PowerMock documentation: Suppress Unwanted Behavior
在这种情况下，您必须使用@SuppressStaticInitializationFor(PackageName.ClassName`）。您可以在 PowerMock 文档中找到更多信息：Suppress Unwanted Behavior
