EasyMock 使用 clone() 方法为 class 创建模拟失败

Question

我在尝试模拟具有 clone() 方法的 class 时遇到问题，该方法会创建对象的深层副本。当我删除此方法时，模拟工作正常。

public class ConcreteClass implements Iterable<Record> {

    @Override
    public Iterator<Record> iterator() { 
    }

    public ConcreteClass clone() {
        ConcreteClass copy = new ConcreteClass();
        return copy;
    }

使用 EasyMock.createMock(ConcreteClass.class) 创建上述 class 的模拟失败并出现以下异常

java.lang.ArrayIndexOutOfBoundsException: 15092

    at net.sf.cglib.asm.ClassReader.<init>(Unknown Source)
    at net.sf.cglib.asm.ClassReader.<init>(Unknown Source)
    at net.sf.cglib.asm.ClassReader.<init>(Unknown Source)
    at net.sf.cglib.asm.ClassReader.<init>(Unknown Source)
    at net.sf.cglib.proxy.BridgeMethodResolver.resolveAll(BridgeMethodResolver.java:61)
    at net.sf.cglib.proxy.Enhancer.emitMethods(Enhancer.java:911)
    at net.sf.cglib.proxy.Enhancer.generateClass(Enhancer.java:498)
    at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
    at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)
    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:129)
    at org.easymock.internal.MocksControl.createMock(MocksControl.java:103)
    at org.easymock.internal.MocksControl.createMock(MocksControl.java:94)
    at org.easymock.EasyMock.createMock(EasyMock.java:136)
    at com.test.Test(Test.java:51)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access[=12=]0(ParentRunner.java:58)
    at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)

然而，当我删除 clone() 方法时，我可以成功创建模拟。我正在使用 EasyMock 3.x

Answer 1

指定完整的 EasyMock 版本是个好主意。我刚刚尝试使用 EasyMock 4.0.2，它没有任何问题。所以升级可能是答案。

请注意 clone() 是 Java 的特殊名称。用户通常会期望 class 为 Cloneable，覆盖为 return Object（出于许多遗留原因）而不是实际的 class。实现应该调用 super.clone()。如果我是你，我会将方法重命名为 copy().

EasyMock 使用 clone() 方法为 class 创建模拟失败

EasyMock create mock fails for a class with a clone() method

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