Upgrade to 3.1.1 leads to 'Failed matching mocking signature for'

[vojkny]

In the beggining I thought this is causes by upgrade of mockk, however in the end I found out this is causes by upgrade of springmockk.

For following code we are getting Failed matching mocking signature for errors on:

every { spyEm.after(any()) } answers { firstArg<() -> Any>().invoke() }
                    ^^^^^

Where after method is defined as:

    open fun after(body: () -> Any) {
        TransactionSynchronizationManager.registerSynchronization(
            object : TransactionSynchronizationAdapter() {
                override fun afterCommit() {
                    body()
                }
            }
        )
    }

Current Behavior

Method cannot be mocked:

io.mockk.MockKException: Failed matching mocking signature for

left matchers: [any()]

	at io.mockk.impl.recording.SignatureMatcherDetector.detect(SignatureMatcherDetector.kt:99)
	at io.mockk.impl.recording.states.RecordingState.signMatchers(RecordingState.kt:39)
	at io.mockk.impl.recording.states.RecordingState.round(RecordingState.kt:31)
	at io.mockk.impl.recording.CommonCallRecorder.round(CommonCallRecorder.kt:50)
	at io.mockk.impl.eval.RecordedBlockEvaluator.record(RecordedBlockEvaluator.kt:63)
	at io.mockk.impl.eval.EveryBlockEvaluator.every(EveryBlockEvaluator.kt:30)
	at io.mockk.MockKDsl.internalEvery(API.kt:93)
	at io.mockk.MockKKt.every(MockK.kt:98)

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: 1.12.3
• Springmockk verison 3.1.1 (3.1.0) works correctly
• OS: Linux + Mac
• Kotlin version: 1.6.10
• JDK version: 17
• Type of test: unit test

[jnizet]

Hi @knyttl. Could you please see if you have a similar problem if you test with Spring Boot's native Mockito support?

And please also join a link to a repo containing a minimal reproduction of the issue, so that I can investigate.
Also note that there is an issue with spies on JDK17 (#65), so maybe it's a similar problem.

[vojkny]

Hi, thanks for a quick response.

Hi @knyttl. Could you please see if you have a similar problem if you test with Spring Boot's native Mockito support?

Sorry, I use pure Spring and without Mockito and I have no experiences with it, so not sure here.

please also join a link to a repo containing a minimal reproduction of the issue

Minimum reproducible example would be looking like this:

package net.goout.entitystorage.controllers

import com.ninjasquad.springmockk.SpykBean
import io.mockk.every
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.extension.ExtendWith
import org.springframework.context.annotation.Bean
import org.springframework.context.annotation.Configuration
import org.springframework.test.context.ContextConfiguration
import org.springframework.test.context.junit.jupiter.SpringExtension

@Configuration
open class SpykedConfig {
    @Bean
    open fun mockedClass() = MockedClass()
}

open class MockedClass {
    open fun after(body: () -> Any) {
        body.invoke()
    }
}

@ExtendWith(SpringExtension::class)
@ContextConfiguration(classes = [SpykedConfig::class])
open class SpykedClassTest {

    @SpykBean
    open lateinit var mockedClass: MockedClass

    @Test
    fun testSpringMockk() {
        every { mockedClass.after(any()) } answers { firstArg<() -> Any>().invoke() }
    }
}

The problem is that – unfortunately it works correctly. I cannot see the difference compared to our code, so I guess I can close this :/