Running test in Eclipse fails with weird MockMaker error, but doesn't fail from mvn build, and not an Android project

[davidmic...@gmail.com]

Someone just asked me to look at an issue with a unit test for plain Java code.  We're not using Android.  When I run the build from the shell with mvn, it works fine.  When I run it from Eclipse, I get the following very unhelpful stack trace:

java.lang.IllegalStateException: Could not initialize plugin: interface org.mockito.plugins.MockMaker
    at org.mockito.internal.configuration.plugins.PluginLoader$1.invoke(PluginLoader.java:60)
    at com.sun.proxy.$Proxy9.isTypeMockable(Unknown Source)
    at org.mockito.internal.util.MockUtil.typeMockabilityOf(MockUtil.java:29)
    at org.mockito.internal.util.MockCreationValidator.validateType(MockCreationValidator.java:22)
    at org.mockito.internal.creation.MockSettingsImpl.validatedSettings(MockSettingsImpl.java:232)
    at org.mockito.internal.creation.MockSettingsImpl.build(MockSettingsImpl.java:226)
    at org.mockito.internal.MockitoCore.mock(MockitoCore.java:64)
    at org.mockito.Mockito.mock(Mockito.java:1855)
    at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:36)
    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:57)
    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.withBefores(DefaultInternalRunner.java:39)
    at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:276)
    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:79)
    at org.mockito.internal.runners.DefaultInternalRunner.run(DefaultInternalRunner.java:85)
    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.IllegalStateException: Failed to load interface org.mockito.plugins.MockMaker implementation declared in sun.misc.CompoundEnumeration@ff5b51f
    at org.mockito.internal.configuration.plugins.PluginLoader.loadImpl(PluginLoader.java:94)
    at org.mockito.internal.configuration.plugins.PluginLoader.loadPlugin(PluginLoader.java:48)
    at org.mockito.internal.configuration.plugins.PluginRegistry.<init>(PluginRegistry.java:20)
    at org.mockito.internal.configuration.plugins.Plugins.<clinit>(Plugins.java:18)
    at org.mockito.internal.configuration.GlobalConfiguration.tryGetPluginAnnotationEngine(GlobalConfiguration.java:55)
    at org.mockito.MockitoAnnotations.initMocks(MockitoAnnotations.java:68)
    ... 20 more
Caused by: org.mockito.exceptions.base.MockitoInitializationException:
Could not initialize inline Byte Buddy mock maker. (This mock maker is not supported on Android.)

Java               : 1.8
JVM vendor name    : Oracle Corporation
JVM vendor version : 25.152-b32
JVM name           : Java HotSpot(TM) 64-Bit Server VM
JVM version        : 1.8.0_152-b32
JVM info           : mixed mode
OS name            : Windows 7
OS version         : 6.1

    at org.mockito.internal.creation.bytebuddy.InlineByteBuddyMockMaker.<init>(InlineByteBuddyMockMaker.java:171)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at java.lang.Class.newInstance(Unknown Source)
    at org.mockito.internal.configuration.plugins.PluginLoader.loadImpl(PluginLoader.java:89)
    ... 25 more
Caused by: java.lang.IllegalStateException: No compatible attachment provider is not available
    at net.bytebuddy.agent.ByteBuddyAgent.install(ByteBuddyAgent.java:367)
    at net.bytebuddy.agent.ByteBuddyAgent.install(ByteBuddyAgent.java:352)
    at net.bytebuddy.agent.ByteBuddyAgent.install(ByteBuddyAgent.java:320)
    at net.bytebuddy.agent.ByteBuddyAgent.install(ByteBuddyAgent.java:306)
    at org.mockito.internal.creation.bytebuddy.InlineByteBuddyMockMaker.<clinit>(InlineByteBuddyMockMaker.java:101)
    ... 31 more

We're not using Android. We're using Java 8, mockito-core 2.15 and byte-buddy 1.7.11.

I was able to run a different test class in the same project without issue. The only barely surprising detail in the one with the problem is that it's mocking an interface.

[Tim van der Lippe]

You are using quite an old version of Mockito. Can you upgrade to the latest version and see if that resolves the issue?

Op vr 26 apr. 2019 om 22:39 schreef <davidmic...@gmail.com>:

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