Mockito对象不是声明类

时间：2016-05-30 13:34:53

标签： java mockito

我有一段时间没有触及Mockito，我从未广泛使用过它。但是今天在一些新代码中我想使用最佳实践，所以我使用以下Java版本提取了mockito-core 2.0.54-beta：

java version "1.8.0"
Java(TM) SE Runtime Environment (build 1.8.0-b132)
Java HotSpot(TM) 64-Bit Server VM (build 25.0-b70, mixed mode)

我需要一个用于测试的界面实例：

https://bitbucket.org/globalmentor/rincl/src/bf0e8875a1bae16247dd904e0b8bc067c9f8abc9/src/main/java/io/rincl/ResourceI18nConcern.java 

public interface ResourceI18nConcern extends Concern {

    public Locale getLocale(@Nonnull Locale.Category category);

    public void setLocale(@Nonnull Locale.Category category, @Nonnull Locale locale);

    public default void setLocale(@Nonnull Locale locale) {...}

    public Resources getResources(@Nonnull final Class<?> contextClass) throws ResourceConfigurationException;

}

该接口扩展了这个接口（只是一个空标记接口）：

https://bitbucket.org/globalmentor/csar/src/125b837e9936ddb8d6340fa99b6b5da872d1e6e5/src/main/java/io/csar/Concern.java

在我的测试中，我尝试做这件事：

final ResourceI18nConcern defaultConcern=mock(ResourceI18nConcern.class);

我得到以下堆栈跟踪：

org.mockito.exceptions.base.MockitoException:
Mockito cannot mock this class: interface io.rincl.ResourceI18nConcern

Mockito can only mock visible & non-final classes.
If you're not sure why you're getting this error, please report to the mailing list.

Underlying exception : java.lang.IllegalArgumentException: object is not an instance of declaring class
    at io.rincl.RinclTest.defaultConcernRinclGetLocaleIsConcernLocale(RinclTest.java:91)
    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:483)
    at org.junit.runners.model.FrameworkMethod$1.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.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    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$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.IllegalArgumentException: object is not an instance of declaring class
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at net.bytebuddy.description.type.TypeDescription$Generic$AnnotationReader$ForTypeArgument.resolve(TypeDescription.java:3875)
    at net.bytebuddy.description.type.TypeDescription$Generic$AnnotationReader$Delegator$Chained.resolve(TypeDescription.java:3501)
    at net.bytebuddy.description.type.TypeDescription$Generic$AnnotationReader$ForTypeArgument.resolve(TypeDescription.java:3834)
    at net.bytebuddy.description.type.TypeDescription$Generic$AnnotationReader$Delegator.asList(TypeDescription.java:3477)
    at net.bytebuddy.description.type.TypeDescription$Generic$OfWildcardType$ForLoadedType.getDeclaredAnnotations(TypeDescription.java:4771)
    at net.bytebuddy.description.type.TypeDescription$Generic$Visitor$TypeVariableErasing.onWildcard(TypeDescription.java:676)
    at net.bytebuddy.description.type.TypeDescription$Generic$Visitor$TypeVariableErasing.onWildcard(TypeDescription.java:659)
    at net.bytebuddy.description.type.TypeDescription$Generic$OfWildcardType.accept(TypeDescription.java:4679)
    at net.bytebuddy.description.type.TypeDescription$Generic$Visitor$TypeVariableErasing.onParameterizedType(TypeDescription.java:687)
    at net.bytebuddy.description.type.TypeDescription$Generic$Visitor$TypeVariableErasing.onParameterizedType(TypeDescription.java:659)
    at net.bytebuddy.description.type.TypeDescription$Generic$OfParameterizedType.accept(TypeDescription.java:5021)
    at net.bytebuddy.description.type.TypeDescription$Generic$LazyProjection.accept(TypeDescription.java:5794)
    at net.bytebuddy.description.method.ParameterDescription$TypeSubstituting.getType(ParameterDescription.java:866)
    at net.bytebuddy.description.method.ParameterList$AbstractBase.asTypeList(ParameterList.java:85)
    at net.bytebuddy.description.method.MethodDescription$AbstractBase.asTypeToken(MethodDescription.java:635)
    at net.bytebuddy.dynamic.scaffold.MethodGraph$Compiler$Default$Key$Harmonized.of(MethodGraph.java:862)
    at net.bytebuddy.dynamic.scaffold.MethodGraph$Compiler$Default$Key$Store.registerTopLevel(MethodGraph.java:1059)
    at net.bytebuddy.dynamic.scaffold.MethodGraph$Compiler$Default.doAnalyze(MethodGraph.java:569)
    at net.bytebuddy.dynamic.scaffold.MethodGraph$Compiler$Default.analyze(MethodGraph.java:529)
    at net.bytebuddy.dynamic.scaffold.MethodGraph$Compiler$Default.doAnalyze(MethodGraph.java:565)
    at net.bytebuddy.dynamic.scaffold.MethodGraph$Compiler$Default.compile(MethodGraph.java:502)
    at net.bytebuddy.dynamic.scaffold.MethodGraph$Compiler$AbstractBase.compile(MethodGraph.java:423)
    at net.bytebuddy.dynamic.scaffold.MethodRegistry$Default.prepare(MethodRegistry.java:489)
    at net.bytebuddy.dynamic.scaffold.subclass.SubclassDynamicTypeBuilder.make(SubclassDynamicTypeBuilder.java:153)
    at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase$Delegator.make(DynamicType.java:2564)
    at org.mockito.internal.creation.bytebuddy.MockBytecodeGenerator.generateMockClass(MockBytecodeGenerator.java:60)
    at org.mockito.internal.creation.bytebuddy.CachingMockBytecodeGenerator$CachedBytecodeGenerator.generate(CachingMockBytecodeGenerator.java:72)
    at org.mockito.internal.creation.bytebuddy.CachingMockBytecodeGenerator$CachedBytecodeGenerator.getOrGenerateMockClass(CachingMockBytecodeGenerator.java:64)
    at org.mockito.internal.creation.bytebuddy.CachingMockBytecodeGenerator.get(CachingMockBytecodeGenerator.java:27)
    at org.mockito.internal.creation.bytebuddy.ByteBuddyMockMaker.createProxyClass(ByteBuddyMockMaker.java:54)
    at org.mockito.internal.creation.bytebuddy.ByteBuddyMockMaker.createMock(ByteBuddyMockMaker.java:27)
    at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:32)
    at org.mockito.internal.MockitoCore.mock(MockitoCore.java:54)
    at org.mockito.Mockito.mock(Mockito.java:1443)
    at org.mockito.Mockito.mock(Mockito.java:1356)
    ... 26 more

我做错了吗？在我看来，这似乎应该是直截了当的。

要重现此问题，请克隆https://bitbucket.org/globalmentor/rincl.git并检查提交2f88d7c5e5ac17b6d316ed54c12cb7b447b7d6ac。然后尝试运行以下测试：

import static org.junit.Assert.*;
import static org.hamcrest.Matchers.*;
import static org.mockito.Mockito.*;
import java.util.Locale;
import java.util.Locale.Category;
import org.junit.*;

public class RinclTest {
    @Test
    public void defaultConcernRinclGetLocaleIsConcernLocale() {
        final ResourceI18nConcern defaultConcern=mock(ResourceI18nConcern.class);
    }
}

3 个答案:

答案 0 :(得分：18)

您的Java运行时版本是从2014年3月开始的;从那时起，VM中已经修复了大量的bug，你应该真正升级。我99％确定此问题与类型注释（@NonNull）有关，这个版本在此版本中首次引入。如果你升级你的VM，我相信你的问题会消失。

我可以使用最近构建的HotSpot VM成功执行您建议的测试。

答案 1 :(得分：1)

如果这对任何人都有帮助，我会遇到上述相同问题，并尝试了所有其他选项，例如升级JVM等，但是解决了我问题的是： https://github.com/mockito/mockito/issues/1606

通过大体上将我的嘲笑版本还原到2.23。+，为我解决了这个问题。

答案 2 :(得分：0)

我的项目遇到了同样的问题，并使用上面的Rincl项目来确认我遇到了同样的问题。在Mac上使用JDK 1.8.0_11，报告的错误与Garret相同。更新到版本JDK 1.8.0_181我运行了Rincl测试，没有错误。显然，Mockito使用的是最新的JDK 1.8.0。

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