Bug: java.lang.AbstractMethodError when mocking FirebaseUser.isEmailVerified

[RuslanKharkevych]

Expected Behavior

Be able to mock isEmailVerified function of the FirebaseUser class in Android instrumented test

Current Behavior

Currently java.lang.AbstractMethodError is thrown every time

Failure Information (for bugs)

The issue is related only to instrumentation tests. In local JUnit tests it works as expected

Steps to Reproduce

Create an Android instrumentation test and try to mock FirebaseUser.isEmailVerified function

Context

• MockK version: 1.12.3
• Kotlin version: 1.5.31
• Type of test: Android instrumented test

Stack trace

java.lang.AbstractMethodError: abstract method "boolean com.google.firebase.auth.UserInfo.isEmailVerified()"
at com.example.ExampleAndroidTest$mockFirebaseUser_isEmailVerified$1.invoke(ExampleAndroidTest.kt:15)
at com.example.ExampleAndroidTest$mockFirebaseUser_isEmailVerified$1.invoke(ExampleAndroidTest.kt:15)
at io.mockk.impl.eval.RecordedBlockEvaluator$record$block$1.invoke(RecordedBlockEvaluator.kt:25)
at io.mockk.impl.eval.RecordedBlockEvaluator$enhanceWithRethrow$1.invoke(RecordedBlockEvaluator.kt:78)
at io.mockk.impl.recording.JvmAutoHinter.autoHint(JvmAutoHinter.kt:23)
at io.mockk.impl.eval.RecordedBlockEvaluator.record(RecordedBlockEvaluator.kt:40)
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)
at com.example.ExampleAndroidTest.mockFirebaseUser_isEmailVerified(ExampleAndroidTest.kt:15)

Minimal reproducible code (the gist of this issue)

import androidx.test.ext.junit.runners.AndroidJUnit4
import com.google.firebase.auth.FirebaseUser
import io.mockk.every
import io.mockk.mockk
import org.junit.Test
import org.junit.runner.RunWith

@RunWith(AndroidJUnit4::class)
class ExampleAndroidTest {
    @Test
    fun mockFirebaseUser_isEmailVerified() {
        val mockUser: FirebaseUser = mockk()
        every { mockUser.isEmailVerified } returns true
    }
}

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions. If you are sure that this issue is important and should not be marked as stale just ask to put an important label.

[JasonChiAT]

got same error on Android instrumented test when using every { }

every { viewModel.isRequesting } returns fakeIsRequesting

java.lang.AbstractMethodError: abstract method "boolean kotlin.reflect.KClass.isValue()"
at io.mockk.core.ValueClassSupport.isValue_safe(ValueClassSupport.kt:64)
at io.mockk.core.ValueClassSupport.getBoxedClass(ValueClassSupport.kt:33)
at io.mockk.impl.instantiation.JvmMockFactoryHelper.toDescription$mockk(JvmMockFactoryHelper.kt:156)
at io.mockk.impl.instantiation.JvmMockFactoryHelper$mockHandler$1.invocation(JvmMockFactoryHelper.kt:26)
at io.mockk.proxy.android.advice.Advice.handle$lambda-0(Advice.kt:78)
at io.mockk.proxy.android.advice.Advice.$r8$lambda$BJwd2E_KuGTkZCQEA_otcmNp7lY(Unknown Source:0)
at io.mockk.proxy.android.advice.Advice$$ExternalSyntheticLambda0.call(Unknown Source:10)

[luongvo]

I'm facing the same issue when executing with an UI test

java.lang.AbstractMethodError: abstract method "boolean kotlin.reflect.KClass.isValue()"
at io.mockk.core.ValueClassSupport.isValue_safe(ValueClassSupport.kt:64)
at io.mockk.core.ValueClassSupport.getBoxedClass(ValueClassSupport.kt:33)
at io.mockk.impl.instantiation.JvmMockFactoryHelper.toDescription$mockk(JvmMockFactoryHelper.kt:156)
at io.mockk.impl.instantiation.JvmMockFactoryHelper$mockHandler$1.invocation(JvmMockFactoryHelper.kt:26)
at io.mockk.proxy.common.ProxyInvocationHandler.invoke(ProxyInvocationHandler.kt:36)
at java.lang.reflect.Proxy.invoke(Proxy.java:1006)
at $Proxy8.invoke(Unknown Source)
at co.nimblehq.sample.compose.ui.screens.home.HomeScreenTest$setup$1.invoke(HomeScreenTest.kt:34)
at co.nimblehq.sample.compose.ui.screens.home.HomeScreenTest$setup$1.invoke(HomeScreenTest.kt:34)
at io.mockk.impl.eval.RecordedBlockEvaluator$record$block$1.invoke(RecordedBlockEvaluator.kt:25)
at io.mockk.impl.eval.RecordedBlockEvaluator$enhanceWithRethrow$1.invoke(RecordedBlockEvaluator.kt:78)
at io.mockk.impl.recording.JvmAutoHinter.autoHint(JvmAutoHinter.kt:23)
at io.mockk.impl.eval.RecordedBlockEvaluator.record(RecordedBlockEvaluator.kt:40)
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)
at co.nimblehq.sample.compose.ui.screens.home.HomeScreenTest.setup(HomeScreenTest.kt:34)
at java.lang.reflect.Method.invoke(Native Method)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
at androidx.test.internal.runner.junit4.statement.RunBefores.evaluate(RunBefores.java:76)
at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
at androidx.compose.ui.test.junit4.AndroidComposeTestRule$apply$1$evaluate$1.invoke(AndroidComposeTestRule.android.kt:148)
at androidx.compose.ui.test.junit4.AndroidComposeTestRule$apply$1$evaluate$1.invoke(AndroidComposeTestRule.android.kt:147)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment$AndroidComposeUiTestImpl.withDisposableContent(ComposeUiTest.android.kt:476)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment$runTest$1$1$1$1$1$1$1.invoke(ComposeUiTest.android.kt:294)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment.withTextInputService(ComposeUiTest.android.kt:360)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment.access$withTextInputService(ComposeUiTest.android.kt:217)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment$runTest$1$1$1$1$1$1.invoke(ComposeUiTest.android.kt:293)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment.withComposeIdlingResource(ComposeUiTest.android.kt:347)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment.access$withComposeIdlingResource(ComposeUiTest.android.kt:217)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment$runTest$1$1$1$1$1.invoke(ComposeUiTest.android.kt:292)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment.withWindowRecomposer(ComposeUiTest.android.kt:321)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment.access$withWindowRecomposer(ComposeUiTest.android.kt:217)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment$runTest$1$1$1$1.invoke(ComposeUiTest.android.kt:291)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment.withTestCoroutines(ComposeUiTest.android.kt:334)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment.access$withTestCoroutines(ComposeUiTest.android.kt:217)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment$runTest$1$1$1.invoke(ComposeUiTest.android.kt:290)
at androidx.compose.ui.test.junit4.EspressoLink.withStrategy(EspressoLink.android.kt:66)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment$runTest$1$1.invoke(ComposeUiTest.android.kt:289)
at androidx.compose.ui.test.junit4.IdlingResourceRegistry.withRegistry(IdlingResourceRegistry.jvm.kt:157)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment$runTest$1.invoke(ComposeUiTest.android.kt:288)
at androidx.compose.ui.test.junit4.ComposeRootRegistry.withRegistry(ComposeRootRegistry.android.kt:146)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment.runTest(ComposeUiTest.android.kt:287)
at androidx.compose.ui.test.junit4.AndroidComposeTestRule$apply$1.evaluate(AndroidComposeTestRule.android.kt:147)
at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
at androidx.test.ext.junit.runners.AndroidJUnit4.run(AndroidJUnit4.java:162)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:27)
at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
at androidx.test.internal.runner.TestExecutor.execute(TestExecutor.java:56)
at androidx.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:395)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:2361)