当我尝试包含对模拟对象的期望时，此 SecurityException 的原因是啥？

Posted 2023-02-24

【中文标题】当我尝试包含对模拟对象的期望时，此 SecurityException 的原因是啥？

【英文标题】：What is the cause for this SecurityException when I try to include the expectations for a mock obejct?当我尝试包含对模拟对象的期望时，此 SecurityException 的原因是什么？

【发布时间】：2012-02-08 13:06:44

【问题描述】：

我正在尝试在我的测试中使用模拟对象。但是，当我尝试列出模拟对象的期望时，会引发相同的异常。 以下是异常的堆栈跟踪：

java.lang.SecurityException: class "org.hamcrest.TypeSafeMatcher"'s signer information does not match signer information of other classes in the same package
    at java.lang.ClassLoader.checkCerts(Unknown Source)
    at java.lang.ClassLoader.preDefineClass(Unknown Source)
    at java.lang.ClassLoader.defineClass(Unknown Source)
    at java.security.SecureClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.access$000(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClassInternal(Unknown Source)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(Unknown Source)
    at java.security.SecureClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.access$000(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClassInternal(Unknown Source)
    at org.jmock.internal.InvocationExpectationBuilder.createExpectationFrom(InvocationExpectationBuilder.java:86)
    at org.jmock.internal.InvocationToExpectationTranslator.invoke(InvocationToExpectationTranslator.java:19)
    at org.jmock.internal.FakeObjectMethods.invoke(FakeObjectMethods.java:38)
    at org.jmock.lib.legacy.ClassImposteriser$4.invoke(ClassImposteriser.java:137)
    at com.activityrecommender.feeds.WeatherFeedBBC$$EnhancerByCGLIB$$b8b5b5a8.refreshFeedData(<generated>)
    at com.activityrecommender.gui.BackgroundTest$2.<init>(BackgroundTest.java:39)
    at com.activityrecommender.gui.BackgroundTest.testBackgroundSunny(BackgroundTest.java:38)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

执行以下代码时发生错误：

context.checking(new Expectations() 
            oneOf (feed).refreshFeedData();
        );

这个异常的原因是什么？

【问题讨论】：

错误消息 -> google -> *** 上的答案 -> Java SecurityException : signer information does not match (.. sorry)

【参考方案1】：

此错误表示您正在尝试使用可能不兼容的类 (Hamcrest)。

这可能是因为您的构建路径中有两个 Hamcrest 库实例。 JMock 依赖于 Hamcrest，而 JUnit 在它的 jar 中使用并包含了一些 Hamcrest 类，所以这可能就是问题所在。

最简单的解决方法是使用不包含 Hamcrest 库的 JUnit 版本junit-dep。这应该使问题消失。 JUnit 4.x 依赖于 Hamcrest 1.1。