Junit/PowerMockito : java.lang.NoClassDefFoundError: javassi

Question

运行 junit 测试时出现以下异常：

java.lang.NoClassDefFoundError: javassist.CannotCompileException
    at java.lang.J9VMInternals.verifyImpl(Native Method)
    at java.lang.J9VMInternals.verify(J9VMInternals.java:85)
    at java.lang.J9VMInternals.initialize(J9VMInternals.java:162)
    at org.powermock.tests.utils.impl.AbstractTestSuiteChunkerImpl.createDefaultExtraMockTransformers(AbstractTestSuiteChunkerImpl.java:257)
    at org.powermock.tests.utils.impl.AbstractTestSuiteChunkerImpl.chunkClass(AbstractTestSuiteChunkerImpl.java:169)
    at org.powermock.tests.utils.impl.AbstractTestSuiteChunkerImpl.<init>(AbstractTestSuiteChunkerImpl.java:96)
    at org.powermock.tests.utils.impl.AbstractTestSuiteChunkerImpl.<init>(AbstractTestSuiteChunkerImpl.java:89)
    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:56)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:39)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:527)
    at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:31)
    at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:24)
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57)
    at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:29)
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57)
    at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:24)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.<init>(JUnit4TestReference.java:32)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestClassReference.<init>(JUnit4TestClassReference.java:25)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:41)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:31)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:452)
    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)
Caused by: java.lang.ClassNotFoundException: javassist.CannotCompileException
    at java.net.URLClassLoader.findClass(URLClassLoader.java:434)
    at java.lang.ClassLoader.loadClassHelper(ClassLoader.java:665)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:644)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:358)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:627)
    ... 28 more

我有以下两类：

public class Employee {
   public static int count() {
     throw new UnsupportedOperationException();
   }
}
public class EmployeeService {
   public int getEmployeeCount() {
     return Employee.count();
   }
}

我在下面写了测试类来测试员工服务：

@RunWith(PowerMockRunner.class)
@PrepareForTest(Employee.class)
public class EmployeeServiceTest {
  @Test
  public void testGetEmployeeCount() {
    PowerMockito.mockStatic(Employee.class);
    PowerMockito.when(Employee.count()).thenReturn(900);
    EmployeeService employeeService = new  EmployeeService();
    Assert.assertEquals(900,employeeService.getEmployeeCount());
  }
}

用于模拟和电源模拟的依赖项如下：

• 莫皮托-全部-1.10.19.jar
• Powermock-mockito-1.6.2-full.jar
• 对象-2.1.jar
• cglib-nodep-2.2.2.jar

为了解决异常，我还在类路径中添加了javassist-3.12.0.GA-sources.jar，但它没有帮助。

但是如上所示获得异常。请帮帮我。

Answer 1

javassist-3.12.0.GA-sources.jar喜欢包含源代码（java文本文件），而不是编译的java类文件。使用jar tf javassist-3.12.0.GA-sources.jar进行调查并确保包含包含.class文件的 jar。