Mockk: init {} beign called on mockk()

[ivanreffatti]

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

Expected Behavior

Mocking an object should not call init {}

Current Behavior

mockk() seems to be calling class init{}

coEvery {
    httpClient.get<HttpStatement>(any<HttpRequestBuilder>())
} returns mockk()
//...
class HttpStatement(
    private val builder: HttpRequestBuilder,
    private val client: HttpClient
) {
    init {
        checkCapabilities() // this method keeps getting called when i try to create the mock
    }
//...
}

Error being caused due to init {} being called

java.lang.NullPointerException
at io.ktor.client.statement.HttpStatement.checkCapabilities(HttpStatement.kt:130)
at io.ktor.client.statement.HttpStatement.(HttpStatement.kt:30)

[OliverCulleyDeLange]

+1.
I have some generated code that loads a library inside its companion init{} block, which isn't available on the test classpath. Instead of mocking System.loadLibrary via mockkStatic (which has bad side effects), i'd like to find a way to mock an object without its init{} block being called.

class User constructor (private val self: Long) {
    companion object {
        init {
            try {
                System.loadLibrary("android")
            } catch (e: UnsatisfiedLinkError) {
                System.err.println("Native code library failed to load.")
                System.err.println("$e")
                exitProcess(1)
            }
        }
...
}

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[PinkieSwirl]

I have the same use case. Is there any known workaround?

I found similar questions here: https://github.com/mockk/mockk/issues/261

Not sure if I should open a new issue for this?

[ivanreffatti]

In my case I gave up from the issue and avoided the mock by using ktor MockEngine, but the problem still there, no way of mocking objects with init logics

[OliverCulleyDeLange]

I worked around the issue by mocking the System call in a mockkStatic block, then calling mockkClass(it) which calls init {} which calls the static system mock. Works well enough for me.

```
fun initRustBindings(vararg rustBindings: KClass<*>) {
mockkStatic("java.lang.System") {
every { System.loadLibrary("android") } returns Unit
rustBindings.forEach {
mockkClass(it)
println("Mocked ${it.simpleName}")
}
}
}

[PinkieSwirl]

First thanks for the replies.

My specific problem is that the init block calls a jni method. Can those be mocked to?