java - 对于提交者来说，Mockito 测试不适用于 Eclipse 4.9

Question

每当我尝试运行 Mockito 测试时，Eclipse 都会给出以下输出:

java.lang.IllegalStateException: Could not initialize plugin: interface org.mockito.plugins.InstantiatorProvider2 (alternate: interface org.mockito.plugins.InstantiatorProvider)

我尝试通过使用maven存储库比较给定版本的mockito和相应的byte buddy版本来与byte buddy一起安装不同版本的mockito。我使用mockito-core 2.28.2和bytebuddy 1.9.10

@RunWith(MockitoJUnitRunner.class)
public class LanguageClientTest {

    private static final String WORKSPACE_EXECUTE_COMMAND = "workspace/executeCommand"; //$NON-NLS-1$

    @Test
    public void shouldInitializeLanguageClient() {

        //given
        LanguageClient mock = mock(LanguageClient.class);
        Mockito.doThrow(new IllegalStateException("Error occurred")).when(mock).startListener();
        //when
        Mockito.when(new LanguageClient()).thenCallRealMethod();
        //then
        verify(mock, Mockito.times(1)).registerCommands(WORKSPACE_EXECUTE_COMMAND);
    }

整个堆栈跟踪:

java.lang.IllegalStateException: Could not initialize plugin: interface org.mockito.plugins.InstantiatorProvider2 (alternate: interface org.mockito.plugins.InstantiatorProvider)
    at org.mockito.internal.configuration.plugins.PluginLoader$1.invoke(PluginLoader.java:74)
    at com.sun.proxy.$Proxy17.getInstantiator(Unknown Source)
    at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.createMock(SubclassByteBuddyMockMaker.java:44)
    at org.mockito.internal.creation.bytebuddy.ByteBuddyMockMaker.createMock(ByteBuddyMockMaker.java:25)
    at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:35)
    at org.mockito.internal.MockitoCore.mock(MockitoCore.java:62)
    at org.mockito.Mockito.mock(Mockito.java:1908)
    at org.mockito.internal.configuration.MockAnnotationProcessor.processAnnotationForMock(MockAnnotationProcessor.java:44)
    at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:19)
    at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:16)
    at org.mockito.internal.configuration.IndependentAnnotationEngine.createMockFor(IndependentAnnotationEngine.java:38)
    at org.mockito.internal.configuration.IndependentAnnotationEngine.process(IndependentAnnotationEngine.java:62)
    at org.mockito.internal.configuration.InjectingAnnotationEngine.processIndependentAnnotations(InjectingAnnotationEngine.java:49)
    at org.mockito.internal.configuration.InjectingAnnotationEngine.process(InjectingAnnotationEngine.java:41)
    at org.mockito.MockitoAnnotations.initMocks(MockitoAnnotations.java:69)
    at org.mockito.internal.runners.DefaultInternalRunner$1$1.evaluate(DefaultInternalRunner.java:43)
    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$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.mockito.internal.runners.DefaultInternalRunner$1.run(DefaultInternalRunner.java:74)
    at org.mockito.internal.runners.DefaultInternalRunner.run(DefaultInternalRunner.java:80)
    at org.mockito.internal.runners.StrictRunner.run(StrictRunner.java:39)
    at org.mockito.junit.MockitoJUnitRunner.run(MockitoJUnitRunner.java:163)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:89)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:209)
Caused by: java.lang.NoClassDefFoundError: org/objenesis/ObjenesisStd
    at org.mockito.internal.creation.instance.ObjenesisInstantiator.<init>(ObjenesisInstantiator.java:16)
    at org.mockito.internal.creation.instance.DefaultInstantiatorProvider.<clinit>(DefaultInstantiatorProvider.java:13)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:264)
    at org.mockito.internal.configuration.plugins.DefaultMockitoPlugins.create(DefaultMockitoPlugins.java:68)
    at org.mockito.internal.configuration.plugins.DefaultMockitoPlugins.getDefaultPlugin(DefaultMockitoPlugins.java:45)
    at org.mockito.internal.configuration.plugins.PluginLoader.loadPlugin(PluginLoader.java:67)
    at org.mockito.internal.configuration.plugins.PluginRegistry.<init>(PluginRegistry.java:36)
    at org.mockito.internal.configuration.plugins.Plugins.<clinit>(Plugins.java:19)
    at org.mockito.internal.runners.RunnerFactory$2.get(RunnerFactory.java:42)
    at org.mockito.internal.runners.RunnerFactory$2.get(RunnerFactory.java:40)
    at org.mockito.internal.runners.DefaultInternalRunner$1$1.evaluate(DefaultInternalRunner.java:40)
    ... 19 more
Caused by: java.lang.ClassNotFoundException: org.objenesis.ObjenesisStd
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 31 more

Answer 1

此错误是由于 MANIFEST.MF 中没有 objenesis 库引起的。因此，Eclipse 有时可以与 Mockito 一起正常工作，有时则不能。我已将以下几行添加到 MANIFEST.MF

 org.mockito.mockito-core,
 net.bytebuddy.byte-buddy,
 org.objenesis

之后，我可以在插件依赖项中看到它并且它起作用了。