Failed to load interface org.mockito.plugins.MockMaker implementation declared in sun.misc.CompoundEnumeratio

[adrienrx]

Hello,

I am getting an issue when trying to use anything mock related in instrumented test.

AndroidJUnitRunner is default 'testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"'

androidTestImplementation config

    androidTestImplementation 'androidx.test.ext:junit-ktx:1.1.3'
    androidTestImplementation 'com.linkedin.dexmaker:dexmaker-mockito-inline:2.28.3'
    androidTestImplementation 'androidx.work:work-testing:2.7.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
    androidTestImplementation 'androidx.test.espresso:espresso-contrib:3.4.0'
    androidTestImplementation 'androidx.test.ext:truth:1.4.0'
    androidTestImplementation 'org.jetbrains.kotlinx:kotlinx-coroutines-test:1.6.4'

jvm is 1.8 + coreLibDesugar up
compileSdk is 31
minSdk is 26

I have tried to run tests with AndroidJunit4::class / MockitoJUnitRunner::class / even without a RunWIth (was getting a bit desperate)/

I'm seeing quite a lot of similar issues online.

org.mockito.exceptions.base.MockitoException: 
Failed to release mocks

This should not happen unless you are using a third-party mock maker
	at REDACTED
	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 androidx.test.internal.runner.junit4.statement.RunBefores.evaluate(RunBefores.java:76)
	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.junit.runners.Suite.runChild(Suite.java:128)
	at org.junit.runners.Suite.runChild(Suite.java:27)
	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$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
	at androidx.test.internal.runner.TestExecutor.execute(TestExecutor.java:56)
	at androidx.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:444)
	at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:2218)
Caused by: java.lang.IllegalStateException: Could not initialize plugin: interface org.mockito.plugins.MockMaker (alternate: null)
	at org.mockito.internal.configuration.plugins.PluginLoader$1.invoke(PluginLoader.java:88)
	at java.lang.reflect.Proxy.invoke(Proxy.java:1006)
	at $Proxy11.isTypeMockable(Unknown Source)
	at org.mockito.internal.util.MockUtil.typeMockabilityOf(MockUtil.java:33)
	at org.mockito.internal.util.MockCreationValidator.validateType(MockCreationValidator.java:22)
	at org.mockito.internal.creation.MockSettingsImpl.validatedSettings(MockSettingsImpl.java:261)
	at org.mockito.internal.creation.MockSettingsImpl.build(MockSettingsImpl.java:234)
	at org.mockito.internal.MockitoCore.mock(MockitoCore.java:94)
	at org.mockito.Mockito.mock(Mockito.java:1981)
	at org.mockito.internal.configuration.MockAnnotationProcessor.processAnnotationForMock(MockAnnotationProcessor.java:71)
	at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:28)
	at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:25)
	at org.mockito.internal.configuration.IndependentAnnotationEngine.createMockFor(IndependentAnnotationEngine.java:44)
	at org.mockito.internal.configuration.IndependentAnnotationEngine.process(IndependentAnnotationEngine.java:72)
	at org.mockito.internal.configuration.InjectingAnnotationEngine.processIndependentAnnotations(InjectingAnnotationEngine.java:73)
	at org.mockito.internal.configuration.InjectingAnnotationEngine.process(InjectingAnnotationEngine.java:47)
	at org.mockito.MockitoAnnotations.openMocks(MockitoAnnotations.java:81)
	at org.mockito.MockitoAnnotations.initMocks(MockitoAnnotations.java:99)
	at REDACTED
	at java.lang.reflect.Method.invoke(Native Method)
	... 26 more
Caused by: java.lang.IllegalStateException: Failed to load interface org.mockito.plugins.MockMaker implementation declared in sun.misc.CompoundEnumeration@3b307d9
	at org.mockito.internal.configuration.plugins.PluginInitializer.loadImpl(PluginInitializer.java:58)
	at org.mockito.internal.configuration.plugins.PluginLoader.loadPlugin(PluginLoader.java:69)
	at org.mockito.internal.configuration.plugins.PluginLoader.loadPlugin(PluginLoader.java:54)
	at org.mockito.internal.configuration.plugins.PluginRegistry.<init>(PluginRegistry.java:28)
	at org.mockito.internal.configuration.plugins.Plugins.<clinit>(Plugins.java:22)
	at org.mockito.internal.configuration.plugins.Plugins.getAnnotationEngine(Plugins.java:69)
	at org.mockito.internal.configuration.GlobalConfiguration.tryGetPluginAnnotationEngine(GlobalConfiguration.java:50)
	at org.mockito.MockitoAnnotations.openMocks(MockitoAnnotations.java:80)
	... 29 more
Caused by: java.lang.reflect.InvocationTargetException
	at java.lang.reflect.Constructor.newInstance0(Native Method)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
	at org.mockito.internal.configuration.plugins.PluginInitializer.loadImpl(PluginInitializer.java:53)
	... 36 more
Caused by: org.mockito.exceptions.base.MockitoInitializationException: 
Could not initialize inline Byte Buddy mock maker.

It appears as if you are trying to run this mock maker on Android which does not support the instrumentation API.

IMPORTANT INFORMATION FOR ANDROID USERS:

The regular Byte Buddy mock makers cannot generate code on an Android VM!
To resolve this, please use the 'mockito-android' dependency for your application:
https://search.maven.org/artifact/org.mockito/mockito-android

Java               : 0.9
JVM vendor name    : The Android Project
JVM vendor version : 2.1.0
JVM name           : Dalvik
JVM version        : 0.9
JVM info           : null
OS name            : Linux
OS version         : 4.4.177-22723052

	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.<init>(InlineDelegateByteBuddyMockMaker.java:244)
	at org.mockito.internal.creation.bytebuddy.InlineByteBuddyMockMaker.<init>(InlineByteBuddyMockMaker.java:23)
	... 39 more
Caused by: java.lang.IllegalStateException: Failed to access VM name via management factory
	at net.bytebuddy.agent.ByteBuddyAgent$ProcessProvider$ForCurrentVm$ForLegacyVm.resolve(ByteBuddyAgent.java:1336)
	at net.bytebuddy.agent.ByteBuddyAgent$ProcessProvider$ForCurrentVm.resolve(ByteBuddyAgent.java:1311)
	at net.bytebuddy.agent.ByteBuddyAgent.install(ByteBuddyAgent.java:611)
	at net.bytebuddy.agent.ByteBuddyAgent.install(ByteBuddyAgent.java:563)
	at net.bytebuddy.agent.ByteBuddyAgent.install(ByteBuddyAgent.java:540)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.<clinit>(InlineDelegateByteBuddyMockMaker.java:115)
	... 40 more
Caused by: java.lang.ClassNotFoundException: java.lang.management.ManagementFactory
	at java.lang.Class.classForName(Native Method)
	at java.lang.Class.forName(Class.java:454)
	at java.lang.Class.forName(Class.java:379)
	at net.bytebuddy.agent.ByteBuddyAgent$ProcessProvider$ForCurrentVm$ForLegacyVm.resolve(ByteBuddyAgent.java:1333)
	... 45 more
Caused by: java.lang.ClassNotFoundException: Didn't find class "java.lang.management.ManagementFactory" on path: DexPathList[[zip file "/system/framework/android.test.runner.jar", zip file "/system/framework/android.test.mock.jar", zip file "/system/framework/android.test.base.jar", zip file "/data/app/~~YKcKaVHNOa7__I0rFd2iQA==/REDACTED.test-qKa2xIJo2Sks_E7Kg7k3-w==/base.apk", zip file "/data/app/~~3GiuANUVt8bg9l8WPsCE-g==/nREDACTED-Twb-54oU2--tQSyby1_2-g==/base.apk"],nativeLibraryDirectories=[/data/app/~~YKcKaVHNOa7__I0rFd2iQA==/REDACTED.test-qKa2xIJo2Sks_E7Kg7k3-w==/lib/arm64, /data/app/~~3GiuANUVt8bg9l8WPsCE-g==/REDACTED-Twb-54oU2--tQSyby1_2-g==/lib/arm64, /data/app/~~YKcKaVHNOa7__I0rFd2iQA==/nREDACTED.test-qKa2xIJo2Sks_E7Kg7k3-w==/base.apk!/lib/arm64-v8a, /data/app/~~3GiuANUVt8bg9l8WPsCE-g==/REDACTED-Twb-54oU2--tQSyby1_2-g==/base.apk!/lib/arm64-v8a, /system/lib64]]
	at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:207)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
	... 49 more

When using a different set of dependencies, the error changes..

    debugImplementation 'androidx.fragment:fragment-testing:1.5.2'

    androidTestImplementation "androidx.test:core:1.4.0"
    androidTestImplementation 'androidx.test:runner:1.4.0'
    androidTestImplementation 'androidx.test:rules:1.4.0'
    androidTestImplementation "androidx.test.ext:junit-ktx:1.1.3"
    androidTestImplementation 'androidx.work:work-testing:2.7.1'
    androidTestImplementation 'androidx.test.ext:truth:1.4.0'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
    androidTestImplementation 'androidx.test.espresso:espresso-contrib:3.4.0'
    androidTestImplementation "com.linkedin.dexmaker:dexmaker-mockito-inline:2.28.3"
    androidTestImplementation 'org.jetbrains.kotlinx:kotlinx-coroutines-test:1.6.4'

java.lang.IllegalStateException: Could not initialize plugin: interface org.mockito.plugins.MockMaker (alternate: null)
	at org.mockito.internal.configuration.plugins.PluginLoader$1.invoke(PluginLoader.java:74)
	at java.lang.reflect.Proxy.invoke(Proxy.java:1006)
	at $Proxy13.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:240)
	at org.mockito.internal.creation.MockSettingsImpl.build(MockSettingsImpl.java:228)
	at org.mockito.internal.MockitoCore.mock(MockitoCore.java:61)
	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.junit.runners.Suite.runChild(Suite.java:128)
	at org.junit.runners.Suite.runChild(Suite.java:27)
	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$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
	at androidx.test.internal.runner.TestExecutor.execute(TestExecutor.java:56)
	at androidx.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:444)
	at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:2218)
Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Ljavax/tools/ToolProvider;
	at org.mockito.internal.creation.bytebuddy.InlineByteBuddyMockMaker.<init>(InlineByteBuddyMockMaker.java:170)
	at java.lang.Class.newInstance(Native Method)
	at org.mockito.internal.configuration.plugins.PluginInitializer.loadImpl(PluginInitializer.java:49)
	at org.mockito.internal.configuration.plugins.PluginLoader.loadPlugin(PluginLoader.java:57)
	at org.mockito.internal.configuration.plugins.PluginLoader.loadPlugin(PluginLoader.java:44)
	at org.mockito.internal.configuration.plugins.PluginRegistry.<init>(PluginRegistry.java:22)
	at org.mockito.internal.configuration.plugins.Plugins.<clinit>(Plugins.java:19)
	at org.mockito.internal.configuration.plugins.Plugins.getMockitoLogger(Plugins.java:66)
	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)
	... 26 more
Caused by: java.lang.ClassNotFoundException: Didn't find class "javax.tools.ToolProvider" on path: DexPathList[[zip file "/system/framework/android.test.runner.jar", zip file "/system/framework/android.test.mock.jar", zip file "/system/framework/android.test.base.jar", zip file "/data/app/~~B22MdhwkjDWTIavspaJNLg==/REDACTED.test-EBd3z8Z437Vq9jy4mgegnw==/base.apk", zip file "/data/app/~~OHg9IelkHvvayhPqGeeUTQ==/nREDACTED-gaDSe_1qSCgegUM4xUxaPw==/base.apk"],nativeLibraryDirectories=[/data/app/~~B22MdhwkjDWTIavspaJNLg==/REDACTED.test-EBd3z8Z437Vq9jy4mgegnw==/lib/arm64, /data/app/~~OHg9IelkHvvayhPqGeeUTQ==/REDACTED-gaDSe_1qSCgegUM4xUxaPw==/lib/arm64, /data/app/~~B22MdhwkjDWTIavspaJNLg==/REDACTED.test-EBd3z8Z437Vq9jy4mgegnw==/base.apk!/lib/arm64-v8a, /data/app/~~OHg9IelkHvvayhPqGeeUTQ==/REDACTED-gaDSe_1qSCgegUM4xUxaPw==/base.apk!/lib/arm64-v8a, /system/lib64]]
	at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:207)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
	... 37 more

[drewhannay]

As stated in the README, the dexmaker-mockito-inline artifact can only be used on Android P (API 28) and above. The underlying system capabilities to mock static and final code does not exist before that API level.

If you are running on Android 4.4, you should use the regular dexmaker-mockito artifact instead.

[adrienrx]

@drewhannay Are you refering to
OS version : 4.4.177-22723052
That's probably referring to my workstation OS, not android. I'm not running 4.4

[adrienrx]

That would be the kernel verison of the phone I'm running the test on.

Starting in Android "P", it is possible to mock final classes and methods using the dexmaker-mockito-inline library. If you execute your tests on a device or emulator running Android P or above

I don't think I'm breaking the readme recommendation. Am I?

[drewhannay]

Ah, my apologies. Usually this is the error you get when running on a too old Android version, and I saw 4.4 and assumed 😅

The other thing to check: Do you have any other mockito dependencies in the androidTestImplementation? Maybe being pulled in transitively through some other dependency? Running ./gradlew :yourModule:androidDependencies should show you the full graph.

[adrienrx]

I'm currently OOO - I'll be updating this ticket on the 07/09. Please don't close