io.mockk.MockKException: Can't instantiate proxy for class kotlin.Function1 #925

prakashparamasivam-rakuten · 2022-09-22T03:50:17Z

Prerequisites

I am running the latest version
I checked the documentation and found no answer
I checked to make sure that this issue has not already been filed

Expected Behavior

Test cases should be working without fail in local machine as well as Circle-CI

Current Behavior

Junit running in Circle-CI is failing with the below exception, But the issue is not observed in Local .
Issue seems with some mockk - kotlin compatible issue. But i am not expert to find it.

Failure Information (for bugs)

Please help provide information about the failure if this is a bug. If it is not a bug, please remove the rest of this template.

Steps to Reproduce

Its unaware, the issues is happening only i CI-pipeline,
When issue is commented or ignored, another junit in same file is failing with same reason.

Context

Please provide any relevant information about your setup. This is important in case the issue is not reproducible except for under certain conditions.

MockK version: 1.12.4
OS: Android:
Kotlin version: 1.7.10
JDK version: 11
JUnit version: Junit-4
Type of test: unit test

Failure Logs

Please include any relevant log snippets or files here.

Stack trace

io.mockk.MockKException: Can't instantiate proxy for class kotlin.Function1
	at app//io.mockk.impl.instantiation.JvmMockFactory.newProxy(JvmMockFactory.kt:64)
	at app//io.mockk.impl.instantiation.AbstractMockFactory.newProxy$default(AbstractMockFactory.kt:29)
	at app//io.mockk.impl.instantiation.AbstractMockFactory.mockk(AbstractMockFactory.kt:59)
	at app//packagename.UseCaseSpec.<init>(UseCaseSpec.kt:211)
	at java.base@11.0.14/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base@11.0.14/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base@11.0.14/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base@11.0.14/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
	at app//org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:250)
	at app//org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:260)
	at app//org.junit.runners.BlockJUnit4ClassRunner$2.runReflectiveCall(BlockJUnit4ClassRunner.java:309)
	at app//org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at app//org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:306)
	at app//org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
	at app//org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
	at app//org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
	at app//org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
	at app//org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
	at app//org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
	at app//org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
	at app//org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
	at app//org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
	at app//org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at app//org.junit.runners.ParentRunner.run(ParentRunner.java:413)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:110)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:38)
	at org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:62)
	at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
	at java.base@11.0.14/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base@11.0.14/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base@11.0.14/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base@11.0.14/java.lang.reflect.Method.invoke(Method.java:566)
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
	at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
	at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
	at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker$2.run(TestWorker.java:176)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60)
	at org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56)
	at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:133)
	at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:71)
	at app//worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69)
	at app//worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74)
Caused by: io.mockk.proxy.MockKAgentException: Failed to subclass interface kotlin.jvm.functions.Function1
	at app//io.mockk.proxy.jvm.ProxyMaker.proxy(ProxyMaker.kt:38)
	at app//io.mockk.impl.instantiation.JvmMockFactory.newProxy(JvmMockFactory.kt:34)
	... 46 more
Caused by: java.lang.IllegalArgumentException: Could not create type
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:159)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:179)
	at io.mockk.proxy.jvm.transformation.SubclassInstrumentation.subclass(SubclassInstrumentation.kt:51)
	at io.mockk.proxy.jvm.ProxyMaker.subclass(ProxyMaker.kt:113)
	at io.mockk.proxy.jvm.ProxyMaker.proxy(ProxyMaker.kt:35)
	... 47 more
Caused by: java.lang.IllegalStateException: java.lang.IllegalStateException: Failed to invoke proxy for public abstract java.lang.Class net.bytebuddy.dynamic.loading.ClassInjector$UsingLookup$MethodHandles$Lookup.defineClass(java.lang.Object,byte[]) throws java.lang.IllegalAccessException
	at net.bytebuddy.dynamic.loading.ClassInjector$UsingLookup.injectRaw(ClassInjector.java:1639)
	at net.bytebuddy.dynamic.loading.ClassInjector$AbstractBase.inject(ClassInjector.java:117)
	at net.bytebuddy.dynamic.loading.ClassLoadingStrategy$UsingLookup.load(ClassLoadingStrategy.java:505)
	at net.bytebuddy.dynamic.TypeResolutionStrategy$Passive.initialize(TypeResolutionStrategy.java:101)
	at net.bytebuddy.dynamic.DynamicType$Default$Unloaded.load(DynamicType.java:6161)
	at io.mockk.proxy.jvm.transformation.SubclassInstrumentation.doInterceptedSubclassing(SubclassInstrumentation.kt:98)
	at io.mockk.proxy.jvm.transformation.SubclassInstrumentation.access$doInterceptedSubclassing(SubclassInstrumentation.kt:21)
	at io.mockk.proxy.jvm.transformation.SubclassInstrumentation$subclass$1.call(SubclassInstrumentation.kt:54)
	at io.mockk.proxy.jvm.transformation.SubclassInstrumentation$subclass$1.call(SubclassInstrumentation.kt:21)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:157)
	... 51 more
Caused by: java.lang.IllegalStateException: Failed to invoke proxy for public abstract java.lang.Class net.bytebuddy.dynamic.loading.ClassInjector$UsingLookup$MethodHandles$Lookup.defineClass(java.lang.Object,byte[]) throws java.lang.IllegalAccessException
	at net.bytebuddy.utility.dispatcher.JavaDispatcher$ProxiedInvocationHandler.invoke(JavaDispatcher.java:1164)
	at com.sun.proxy.$Proxy84.defineClass(Unknown Source)
	at net.bytebuddy.dynamic.loading.ClassInjector$UsingLookup.injectRaw(ClassInjector.java:1637)
	... 60 more
Caused by: java.lang.LinkageError: loader 'app' attempted duplicate class definition for kotlin.jvm.functions.Function1$Subclass1. (kotlin.jvm.functions.Function1$Subclass1 is in unnamed module of loader 'app')
	at java.base/java.lang.ClassLoader.defineClass1(Native Method)
	at java.base/java.lang.System$2.defineClass(System.java:2131)
	at java.base/java.lang.invoke.MethodHandles$Lookup.defineClass(MethodHandles.java:962)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at net.bytebuddy.utility.Invoker$Dispatcher.invoke(Unknown Source)
	at net.bytebuddy.utility.dispatcher.JavaDispatcher$Dispatcher$ForNonStaticMethod.invoke(JavaDispatcher.java:1019)
	at net.bytebuddy.utility.dispatcher.JavaDispatcher$ProxiedInvocationHandler.invoke(JavaDispatcher.java:1149)
	... 62 more

Minimal reproducible code (the gist of this issue)

// -----------------------[ GRADLE DEFINITIONS ] -----------------------
dependencies {
    testImplementation "io.mockk:mockk:${versions.mockk}" // 1.12.4
}
// -----------------------[ YOUR CODE STARTS HERE ] -----------------------

class SmapleTest {

   @Test
     fun `getBannerStatus() should return appropriate banner status from repository`() = runBlocking {
         coEvery { repository.BannerStatus() } returns Result.success(true)
    
        bannerUseCase.getBannerStatus(onSuccess = {
            it shouldBeEqualTo true
        })
     }

}

The text was updated successfully, but these errors were encountered:

aSemy · 2022-09-22T12:40:50Z

hi - have you tried using the latest version of MockK?

prakashparamasivam-rakuten · 2022-09-26T02:18:44Z

@aSemy , I tried with 1.13.1 mockk version.
The issue is still same

prakashparamasivam-rakuten · 2022-09-28T06:22:10Z

We have figured out the problem,
What went wrong ?:
while executing from command line we were adding --max-worker=1
./gradlew $TASK --info --max-workers=1

How it fixed
After removing --max-worker=1 , the build succeeded
./gradlew $TASK --info

My issue might have solved, if mockk team wants to investigate and support the above problem then you guys can investigate further.

rgonciarz · 2022-12-10T01:56:05Z

A similar side effect:
#997

prakashparamasivam-rakuten mentioned this issue Sep 27, 2022

Exception mocking lambdas when running multiple test classes in jdk 11 #598

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io.mockk.MockKException: Can't instantiate proxy for class kotlin.Function1 #925

io.mockk.MockKException: Can't instantiate proxy for class kotlin.Function1 #925

prakashparamasivam-rakuten commented Sep 22, 2022 •

edited

aSemy commented Sep 22, 2022

prakashparamasivam-rakuten commented Sep 26, 2022

prakashparamasivam-rakuten commented Sep 28, 2022

rgonciarz commented Dec 10, 2022

io.mockk.MockKException: Can't instantiate proxy for class kotlin.Function1 #925

io.mockk.MockKException: Can't instantiate proxy for class kotlin.Function1 #925

Comments

prakashparamasivam-rakuten commented Sep 22, 2022 • edited

Prerequisites

Expected Behavior

Current Behavior

Failure Information (for bugs)

Steps to Reproduce

Context

Failure Logs

Stack trace

Minimal reproducible code (the gist of this issue)

aSemy commented Sep 22, 2022

prakashparamasivam-rakuten commented Sep 26, 2022

prakashparamasivam-rakuten commented Sep 28, 2022

rgonciarz commented Dec 10, 2022

prakashparamasivam-rakuten commented Sep 22, 2022 •

edited