运行 PowerMock 时出现 NoClassDefFound 错误

Question

我收到这个错误：

java.lang.NoClassDefFoundError: org/powermock/reflect/proxyframework/ClassLoaderRegisterProxyFramework
    at org.powermock.tests.utils.impl.AbstractCommonTestSuiteChunkerImpl.registerProxyframework(AbstractCommonTestSuiteChunkerImpl.java:101)
    at org.powermock.tests.utils.impl.AbstractCommonTestSuiteChunkerImpl.chunkClass(AbstractCommonTestSuiteChunkerImpl.java:114)
    at org.powermock.tests.utils.impl.AbstractCommonTestSuiteChunkerImpl.<init>(AbstractCommonTestSuiteChunkerImpl.java:60)
    at org.powermock.tests.utils.impl.AbstractCommonTestSuiteChunkerImpl.<init>(AbstractCommonTestSuiteChunkerImpl.java:54)
    at org.powermock.tests.utils.impl.AbstractTestSuiteChunkerImpl.<init>(AbstractTestSuiteChunkerImpl.java:58)
    at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.<init>(JUnit4TestSuiteChunkerImpl.java:49)
    at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.<init>(AbstractCommonPowerMockRunner.java:32)
    at org.powermock.modules.junit4.PowerMockRunner.<init>(PowerMockRunner.java:34)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:104)
    at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:86)
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
    at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
    at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:33)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createUnfilteredTest(JUnit4TestLoader.java:84)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:70)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:43)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:444)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.ClassNotFoundException: org.powermock.reflect.proxyframework.ClassLoaderRegisterProxyFramework
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 25 more

我已经在 pom.xml 中添加了这些依赖项。我已经检查了类似实现的堆栈流并进行了全新安装。我的项目正在构建文件，但运行ning 测试出现错误。我正在尝试运行通过 eclipse。

    <!-- Power Mock dependencies -->
            <dependency>
                <groupId>org.mockito</groupId>
                <artifactId>mockito-all</artifactId>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>org.powermock</groupId>
                <artifactId>powermock-api-mockito</artifactId>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>org.powermock</groupId>
                <artifactId>powermock-module-junit4</artifactId>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>org.powermock</groupId>
                <artifactId>powermock-module-junit4-legacy</artifactId>
                <version>1.7.0</version>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>org.powermock</groupId>
                <artifactId>powermock-reflect</artifactId>
                <version>1.7.0</version>
            </dependency>
            <dependency>
                <groupId>org.powermock</groupId>
                <artifactId>powermock-api-easymock</artifactId>
                <version>1.7.0</version>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>org.easymock</groupId>
                <artifactId>easymock</artifactId>
                <version>3.4</version>
                <scope>test</scope>
            </dependency>

我正在运行ning java class 使用 PowerMockRunner 并使用注解 InjectMock 注入我的测试 class。然后使用 MockStatic 方法模拟静态 class 。此外，我添加了 PrepareForTest 注释并添加了 Class，它在该位置具有静态方法。

我更新了我的代码并遵循了几个示例，但是这个错误来了。我做错了什么？

My code is like this. 
 class A{ 
void static method testA(String str){ .... do something; }
}

 class B{ 
     testB(String s) 
                 { A.testA(s); 
     }
 }

现在，当我尝试使用 PowerMockRunner 运行在我的 class A 上测试用例时。我在测试用例上给出了注释@preparefortest({A.class}) @运行with(PowerMockRunner.class)

Answer 1

我在使用 PowerMock 1.7.1 时看到了同样的错误。在没有显式依赖的情况下，maven 引入了 powermock-core 的 1.6.5 版本。添加对 powermock-core 版本 1.7.1 的显式依赖为我修复了这个错误。

所以你的解决方案应该是添加对 powermock-core 1.7.0 版本的显式依赖：

<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-core</artifactId>
    <version>1.7.0</version>
    <scope>test</scope>
</dependency>

运行 PowerMock 时出现 NoClassDefFound 错误

NoClassDefFound error while Running with PowerMock

powermock