Not able to use MockK in Android Espresso UI Testing - kotlin

Question

I am getting a error when trying to use MockK in UI test which was perfectly working in Unittest cases
MockK could not self-attach a jvmti agent to the current VM
Full error report
Caused by: io.mockk.proxy.MockKAgentException: MockK could not self-attach a jvmti agent to the current VM. This feature is required for inline mocking.
This error occured due to an I/O error during the creation of this agent: java.io.IOException: Unable to dlopen libmockkjvmtiagent.so: dlopen failed: library "libmockkjvmtiagent.so" not found
Potentially, the current VM does not support the jvmti API correctly
at io.mockk.proxy.android.AndroidMockKAgentFactory.init(AndroidMockKAgentFactory.kt:67)
at io.mockk.impl.JvmMockKGateway.<init>(JvmMockKGateway.kt:46)
at io.mockk.impl.JvmMockKGateway.<clinit>(JvmMockKGateway.kt:186)
... 30 more
Caused by: java.io.IOException: Unable to dlopen libmockkjvmtiagent.so: dlopen failed: library "libmockkjvmtiagent.so" not found
at dalvik.system.VMDebug.nativeAttachAgent(Native Method)
at dalvik.system.VMDebug.attachAgent(VMDebug.java:693)
at android.os.Debug.attachJvmtiAgent(Debug.java:2617)
at io.mockk.proxy.android.JvmtiAgent.<init>(JvmtiAgent.kt:48)
at io.mockk.proxy.android.AndroidMockKAgentFactory.init(AndroidMockKAgentFactory.kt:40)
Let me know is there any other way to initialize the MockK to make use in Espresso
When tried to add
androidTestImplementation "org.mockito:mockito-inline:$mockitoVersion"
Observed this error
2 files found with path 'mockito-extensions/org.mockito.plugins.MockMaker'.
Adding a packagingOptions block may help, please refer to
https://developer.android.com/reference/tools/gradle-api/7.2/com/android/build/api/dsl/ResourcesPackagingOptions
for more information
Versions
mockk version = 1.12.4
Android = 32
kotlin_version = '1.6.21'
Code which causes this issue when added in android UI testcases(Espresso)
val presenter = mockk<LoginPresenter>()
val view = mockk<LoginView>()
How to perform a mock api call like this
val presenter = mockk<LoginPresenter>()
val view = mockk<LoginView>()
onView(withId(R.id.button_login)).perform(loginClick())
But i want mock api to be called
instead of loginClick() in perform() can i call some how the below execution
so that my app uses mock api's
or is there any way to make my entire testcase file use mockk data
every { presenter.onLoginButtonClicked("bc#mail.com","Abc123") } returns view.onCognitoLoginSuccess()

Answer 1

For me adding this solved the problem:
android {
testOptions {
packagingOptions {
jniLibs {
useLegacyPackaging = true
}
}
}
}
I found this here. Hope it helps.

Answer 2

Accorfing to here :
Instrumented Android tests are all failing due to issue with mockk
1.12.4
I used io.mockk:mockk-android:1.12.4 and i have same issue..
SOLUTION:
I change the version of io.mockk:mockk-android to 1.12
3 and test runed fine for me
androidTestImplementation "io.mockk:mockk-android:1.12.3"