从SBT运行Mockito时出现java.lang.IllegalAccessError

看起来SBT类加载和Mockito搞砸了

project/Build.scala

project/plugins.sbt

src/main/java/com/example/Consumer.java

src/main/java/com/example/JavaMain.java

sbt运行产生以下异常：

[info] Running com.example.JavaMain 
[error] (run-main-0) org.mockito.exceptions.base.MockitoException: 
[error] Mockito cannot mock this class: interface com.example.Consumer$Input
[error] Mockito can only mock visible & non-final classes.
[error] If you're not sure why you're getting this error, please report to the mailing list.
org.mockito.exceptions.base.MockitoException: 
Mockito cannot mock this class: interface com.example.Consumer$Input
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.
    at com.example.JavaMain.main(JavaMain.java:8)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
Caused by: org.mockito.cglib.core.CodeGenerationException: java.lang.reflect.InvocationTargetException-->null
    at org.mockito.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:238)
    at org.mockito.cglib.proxy.Enhancer.createHelper(Enhancer.java:378)
    at org.mockito.cglib.proxy.Enhancer.createClass(Enhancer.java:318)
    at org.mockito.internal.creation.jmock.ClassImposterizer.createProxyClass(ClassImposterizer.java:110)
    at org.mockito.internal.creation.jmock.ClassImposterizer.imposterise(ClassImposterizer.java:62)
    at org.mockito.internal.creation.jmock.ClassImposterizer.imposterise(ClassImposterizer.java:56)
    at org.mockito.internal.creation.CglibMockMaker.createMock(CglibMockMaker.java:23)
    at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:26)
    at org.mockito.internal.MockitoCore.mock(MockitoCore.java:51)
    at org.mockito.Mockito.mock(Mockito.java:1243)
    at org.mockito.Mockito.mock(Mockito.java:1120)
    at com.example.JavaMain.main(JavaMain.java:8)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.mockito.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:385)
    at org.mockito.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:220)
    at org.mockito.cglib.proxy.Enhancer.createHelper(Enhancer.java:378)
    at org.mockito.cglib.proxy.Enhancer.createClass(Enhancer.java:318)
    at org.mockito.internal.creation.jmock.ClassImposterizer.createProxyClass(ClassImposterizer.java:110)
    at org.mockito.internal.creation.jmock.ClassImposterizer.imposterise(ClassImposterizer.java:62)
    at org.mockito.internal.creation.jmock.ClassImposterizer.imposterise(ClassImposterizer.java:56)
    at org.mockito.internal.creation.CglibMockMaker.createMock(CglibMockMaker.java:23)
    at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:26)
    at org.mockito.internal.MockitoCore.mock(MockitoCore.java:51)
    at org.mockito.Mockito.mock(Mockito.java:1243)
    at org.mockito.Mockito.mock(Mockito.java:1120)
    at com.example.JavaMain.main(JavaMain.java:8)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
Caused by: java.lang.IllegalAccessError: class com.example.Consumer$Input$$EnhancerByMockitoWithCGLIB$$5997e3ec cannot access its superinterface com.example.Consumer$Input
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.mockito.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:385)
    at org.mockito.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:220)
    at org.mockito.cglib.proxy.Enhancer.createHelper(Enhancer.java:378)
    at org.mockito.cglib.proxy.Enhancer.createClass(Enhancer.java:318)
    at org.mockito.internal.creation.jmock.ClassImposterizer.createProxyClass(ClassImposterizer.java:110)
    at org.mockito.internal.creation.jmock.ClassImposterizer.imposterise(ClassImposterizer.java:62)
    at org.mockito.internal.creation.jmock.ClassImposterizer.imposterise(ClassImposterizer.java:56)
    at org.mockito.internal.creation.CglibMockMaker.createMock(CglibMockMaker.java:23)
    at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:26)
    at org.mockito.internal.MockitoCore.mock(MockitoCore.java:51)
    at org.mockito.Mockito.mock(Mockito.java:1243)
    at org.mockito.Mockito.mock(Mockito.java:1120)
    at com.example.JavaMain.main(JavaMain.java:8)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)

但是，使用java或scala运行的效果与预期的一样：

> sbt assembly && java -jar target/scala-2.10/so-mockito-assembly-0.1-SNAPSHOT.jar
[JavaMain] Created mock: 'Mock for Input, hashCode: 1317029026'

> sbt assembly && scala -cp target/scala-2.10/so-mockito-assembly-0.1-SNAPSHOT.jar 'com.example.JavaMain'
[JavaMain] Created mock: 'Mock for Input, hashCode: 1035091326'

---

有人能确认SBT 0.13.1吗？

当内部com.example.Consumer.Input接口的访问修饰符变为公共时，它可以正常工作，如下所示。注意该接口的公共关键字：

package com.example;

class Consumer {
    public interface Input {
        String get();
    }

    private final Input input;

    static Consumer create(Input input) {
        return new Consumer(input);
    }

    private Consumer(Input input) {
        this.input = input;
    }
}

一个示例sbt运行在大约之前，以了解版本、插件等

$ sbt about run
[info] Loading global plugins from /Users/jacek/.sbt/0.13/plugins
[info] Loading project definition from /Users/jacek/sandbox/so/mockito/project
[info] Set current project to so-mockito (in build file:/Users/jacek/sandbox/so/mockito/)
[info] This is sbt 0.13.1
[info] The current project is {file:/Users/jacek/sandbox/so/mockito/}root 0.1-SNAPSHOT
[info] The current project is built against Scala 2.10.3
[info] Available Plugins: com.typesafe.sbt.SbtGit, com.typesafe.sbt.SbtProguard, growl.GrowlingTests, np.Plugin, com.timushev.sbt.updates.UpdatesPlugin, sbtassembly.Plugin
[info] sbt, sbt plugins, and build definitions are using Scala 2.10.3
[info] Running com.example.JavaMain
[JavaMain] Created mock: 'Mock for Input, hashCode: 256995217'
[success] Total time: 0 s, completed Jan 29, 2014 10:00:13 PM

顺便说一句，在这个特定的构建配置中，使用build.sbt可能是一个更好的选择，因为它会变得更加清晰

build.sbt

---

当从scala代码mock[org.flywaydb.core.flyway]模拟flyway时，我被一个类似的错误打败了测试通过Intellij运行得很好，但通过sbt测试它引发了： java.lang.IllegalAccessError:尝试访问类org.flywaydb.core.Flyway 对于其他谷歌用户，我的解决方案只是升级mockito core：

``` -org.mockito%mockito核心%2.7.22， +org.mockito%mockito核心%2.15.0

---

```

您可以尝试使用Java 7运行SBT吗？它有时会有帮助。我在使用Java 7运行时，在玩这个简单的示例时，我注意到将输入的可见性从包private更改为public确实会使它与SBT一起工作。然而，这与问题无关。我想远离围绕一个工具设计一个系统。我想说这绝对是SBT中的一个bug。使用build.sbt而不是build.scalaNow的好处是，当我考虑它而不是专注于解决问题时，它确实可能是sbt中的一个问题。您介意在中报告吗？在sbt中，默认的类加载器是sbt启动器的类加载器，但您是在子类加载器中运行的。mockito需要任何有趣的类加载器解决方法吗？这与在任何容器中使用mockito是一样的，比如OSGi或Servlet容器。是的，在我看来，mockito是在自动创建子类，但似乎既没有使用正确的类加载器，也没有某种JVM安全权限阻止它。我真的不知道莫基托的细节。如果您可以帮助隔离问题，我们可以尝试发布修复程序。

[info] Running com.example.JavaMain 
[error] (run-main-0) org.mockito.exceptions.base.MockitoException: 
[error] Mockito cannot mock this class: interface com.example.Consumer$Input
[error] Mockito can only mock visible & non-final classes.
[error] If you're not sure why you're getting this error, please report to the mailing list.
org.mockito.exceptions.base.MockitoException: 
Mockito cannot mock this class: interface com.example.Consumer$Input
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.
    at com.example.JavaMain.main(JavaMain.java:8)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
Caused by: org.mockito.cglib.core.CodeGenerationException: java.lang.reflect.InvocationTargetException-->null
    at org.mockito.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:238)
    at org.mockito.cglib.proxy.Enhancer.createHelper(Enhancer.java:378)
    at org.mockito.cglib.proxy.Enhancer.createClass(Enhancer.java:318)
    at org.mockito.internal.creation.jmock.ClassImposterizer.createProxyClass(ClassImposterizer.java:110)
    at org.mockito.internal.creation.jmock.ClassImposterizer.imposterise(ClassImposterizer.java:62)
    at org.mockito.internal.creation.jmock.ClassImposterizer.imposterise(ClassImposterizer.java:56)
    at org.mockito.internal.creation.CglibMockMaker.createMock(CglibMockMaker.java:23)
    at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:26)
    at org.mockito.internal.MockitoCore.mock(MockitoCore.java:51)
    at org.mockito.Mockito.mock(Mockito.java:1243)
    at org.mockito.Mockito.mock(Mockito.java:1120)
    at com.example.JavaMain.main(JavaMain.java:8)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.mockito.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:385)
    at org.mockito.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:220)
    at org.mockito.cglib.proxy.Enhancer.createHelper(Enhancer.java:378)
    at org.mockito.cglib.proxy.Enhancer.createClass(Enhancer.java:318)
    at org.mockito.internal.creation.jmock.ClassImposterizer.createProxyClass(ClassImposterizer.java:110)
    at org.mockito.internal.creation.jmock.ClassImposterizer.imposterise(ClassImposterizer.java:62)
    at org.mockito.internal.creation.jmock.ClassImposterizer.imposterise(ClassImposterizer.java:56)
    at org.mockito.internal.creation.CglibMockMaker.createMock(CglibMockMaker.java:23)
    at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:26)
    at org.mockito.internal.MockitoCore.mock(MockitoCore.java:51)
    at org.mockito.Mockito.mock(Mockito.java:1243)
    at org.mockito.Mockito.mock(Mockito.java:1120)
    at com.example.JavaMain.main(JavaMain.java:8)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
Caused by: java.lang.IllegalAccessError: class com.example.Consumer$Input$$EnhancerByMockitoWithCGLIB$$5997e3ec cannot access its superinterface com.example.Consumer$Input
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.mockito.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:385)
    at org.mockito.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:220)
    at org.mockito.cglib.proxy.Enhancer.createHelper(Enhancer.java:378)
    at org.mockito.cglib.proxy.Enhancer.createClass(Enhancer.java:318)
    at org.mockito.internal.creation.jmock.ClassImposterizer.createProxyClass(ClassImposterizer.java:110)
    at org.mockito.internal.creation.jmock.ClassImposterizer.imposterise(ClassImposterizer.java:62)
    at org.mockito.internal.creation.jmock.ClassImposterizer.imposterise(ClassImposterizer.java:56)
    at org.mockito.internal.creation.CglibMockMaker.createMock(CglibMockMaker.java:23)
    at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:26)
    at org.mockito.internal.MockitoCore.mock(MockitoCore.java:51)
    at org.mockito.Mockito.mock(Mockito.java:1243)
    at org.mockito.Mockito.mock(Mockito.java:1120)
    at com.example.JavaMain.main(JavaMain.java:8)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)

> sbt assembly && java -jar target/scala-2.10/so-mockito-assembly-0.1-SNAPSHOT.jar
[JavaMain] Created mock: 'Mock for Input, hashCode: 1317029026'

> sbt assembly && scala -cp target/scala-2.10/so-mockito-assembly-0.1-SNAPSHOT.jar 'com.example.JavaMain'
[JavaMain] Created mock: 'Mock for Input, hashCode: 1035091326'

package com.example;

class Consumer {
    public interface Input {
        String get();
    }

    private final Input input;

    static Consumer create(Input input) {
        return new Consumer(input);
    }

    private Consumer(Input input) {
        this.input = input;
    }
}

$ sbt about run
[info] Loading global plugins from /Users/jacek/.sbt/0.13/plugins
[info] Loading project definition from /Users/jacek/sandbox/so/mockito/project
[info] Set current project to so-mockito (in build file:/Users/jacek/sandbox/so/mockito/)
[info] This is sbt 0.13.1
[info] The current project is {file:/Users/jacek/sandbox/so/mockito/}root 0.1-SNAPSHOT
[info] The current project is built against Scala 2.10.3
[info] Available Plugins: com.typesafe.sbt.SbtGit, com.typesafe.sbt.SbtProguard, growl.GrowlingTests, np.Plugin, com.timushev.sbt.updates.UpdatesPlugin, sbtassembly.Plugin
[info] sbt, sbt plugins, and build definitions are using Scala 2.10.3
[info] Running com.example.JavaMain
[JavaMain] Created mock: 'Mock for Input, hashCode: 256995217'
[success] Total time: 0 s, completed Jan 29, 2014 10:00:13 PM

import AssemblyKeys._

name := "so-mockito"

compileOrder := CompileOrder.JavaThenScala

libraryDependencies += "org.mockito" % "mockito-core" % "1.9.5"

sbtassembly.Plugin.buildSettings

sbtassembly.Plugin.assemblySettings

mainClass in assembly := Some("com.example.JavaMain")