Hello guys! I was wondering here if any of you have already mocked Ktor HttpResponse. I've tried as the following. Do you have any suggestion? https://kotlinlang.slack.com/archives/C0A974TJ9/p1610688463022200

Possibly a dumb question, but does anyone here happen to know if there’s a way to mock constructors that doesn’t result in the underlying class’s real constructor actually being called?  From what I can tell (somewhat astonishingly), the default behavior of mockkConstructor() is to actually call a real constructor, then discard its output and substitute a mockk singleton.  This is somewhat disappointing, since it suggests that you can’t actually mock constructors with mockkConstructor() (ie, that unwanted side-effects will still occur)

that’s a tricky one and there’s an open issue about it AFAIR. The thing is mockk still needs to somehow instantiate an instance of the class and thus execute a constructor. The bad answer to your question, then, is that ideally your constructors should not have side effects; a possible workaround could be to put them in a @PostConstruct method

1.10.6

has just been released: it has a good number of bugfixes, feel free to check it out!

Hi all! I am using mockk for tests but keeps failing to mock the calls that I expect, when I try running all tests from cli (with gradle:

gradle :test

). when run individually with

kotest

runs perfectly. I have something like this:

beforeSpec {
  Application.start()
  mockkObject(MyObjectClass)
  every { MyObjectClass.getRandomString() } returns "call made"
})

afterSpec {
   clearAllMocks()
   Application.stop()
}

....
// some other tests that should make calls to the function that I mocked above

"verify mockk" {
   verify(exactly = 7) {
        MyObjectClass.getRandomString()
   }
}

I can't figure out what could be wrong here, I get this error when run from the command line :

java.lang.AssertionError: Verification failed: call 1 of 1: MyObjectClass(object MyObjectClass).getRandomString()) was not called  .......

Any help is appreciated, thank you! 🙏

Hi everyone ! Is it possible to test following piece of code via mocks ?

process
    .inputStream
    .bufferedReader()
    .useLines { seq ->
        val summary = seq.find { line -> line.contains(KEY_PACKET_LOSS) }

        if (summary != null) {
            val loss = packetLoss(summary)

            val result = when {
                loss > acceptablePacketLoss -> Stability.UNSTABLE
                loss == MAX_LOSS -> Stability.NO_CONNECTION
                else -> Stability.STABLE
            }

            continuation.resumeIfActive(result)
        } else {
            continuation.resumeWithExceptionIfActive(
                IllegalStateException("Couldn't find result line in ping command")
            )
        }
    }

I added required statics, but

bufferedReader

and

useLines

are inline methods… can I work this around somehow ?

Good evening. Sadly, i'm not good at testing and I need some help. I'm trying to use mockk to mock my Retrofit API response. I?m trying to do as follow:

Response.success(mockedResponseList)

Here's the code complete:

coEvery { restApi.getAllBeersWithPagination(1, null).hint(Response::class) } coAnswers { Response.success(mockedResponseList)}

But it always returns:

java.lang.ClassCastException: java.lang.Object cannot be cast to retrofit2.Response

Someone can help me, please? Thanks

hello folks given the function:

fun <T : Any> myFunction(foo: Foo, bar: Bar, response: KClass<T>): MyResponse<T> { do magic }

how can it be mocked to control the returned object? I tried something like:

every { mockedClass.myFunction(any(), any(), ofType(SomeType::class) } returns SomeType()

but it didn't work... and using the type directly,

myFunction(any(), any(), SomeType::class)

is never matched.

uhm not sure i understand what you’re trying to achieve do you want to return a different employeeAttribute depending on the value of the parameter being passed to getEmployee?

and the fun `

private fun getEmployees(users: List<String>)

takes a list that(also I mocked) which has two values “1” and “3"

Say I have a verify block like this:

verify {
    someMethod(capture(mySlot), "Some specific value")
}

Is there any way to actually just capture the value from when someMethod() was called with “Some specific value”? Or will that capture() match every single call, even the ones where the whole expression doesn’t match?

Hello, i am getting error with args and i dont know what is the solution.

answers {
    thirdArg<(String) -> Unit>().invoke("text")
}

i had to change it to

answers {
    thirdArg<(String) -> Boolean>().invoke("text")
}

but i am getting the next solution

Unit cannot be cast to java.lang.Boolean

any idea? thanks

Hi, sorry to ask another time help after one week, at least I will write everything on the same thread. I have to test a function to ascertain that returns a type. I am using firebase initialising via an Object the function that calls FirebaseAnalytics

object AnalyticsReporter {

    fun logEvent(message: String, bundle: Bundle = Bundle.EMPTY) {

        FirebaseAnalytics.getInstance(ProActiveApplication.applicationContext()).logEvent(message, bundle)
    }

the method i call is this one :

when (loginState.value) {
       
            is EnterPassword -> {
                unknownPassword.onNext(AuthenticationCredentials(client, emailAddress))
                logEvent("user_forgot_password")
            }
}

hey guys, I really really need a way to create a mockk from within Java code.. is there any way to do it?

Hi guys and gals! Have a silly question, but would like to get your opinion. How you decide whether use spyk or mockk? When you would prefer one on top of another?

Hi again! I did not find any related thread on this channel, so will ask. When I am doing some sequence verification and one of the call arguments does not match - I get:

Verification failed: calls are not exactly matching verification sequence

which is fine. However the error message is not descriptive. It points to the high level problem (something wrong with whole sequence) instead of saying something like: "Hey, your sequence failed because of argument matching here" Are there a way to get more descriptive message when something like that happens? Is it me that incorrectly structure the test. Attaching simplified version of the test:

@Test
    fun `when connect`() {
        // When
        subject.connect()

        // Then
        verifySequence {
            mockStateListener(State.CONNECTING)
            mockPlatformSocket.openSocket(any())
        }
    }

And the error:

Verification failed: calls are not exactly matching verification sequence

Matchers: 
Function1(#1).invoke(eq(CONNECTING)))
+PlatformSocket(#2).openSocket())

Calls:
1) Function1(#1).invoke(CONNECTED)
2) +PlatformSocket(#2).openSocket()

Stack traces:

Is it possible to only verify a function call but ignore the specific instance that a mocked function is being called with?

does anybody know if mockk v1.11.0 supports mocking inline value classes? it seems it does not…

I just wrote a bunch of tests, that passed just fine on java 8, but when I ran them on java 11 (which is what our build box has) I got this warning:

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access using Lookup on io.mockk.proxy.jvm.ClassLoadingStrategyChooser (file:/home/circleci/.gradle/caches/transforms-2/files-2.1/5bf8247b5024cc1f3e5041b83c85dfb2/jetified-mockk-agent-jvm-1.10.6.jar) to class javax.xml.parsers.DocumentBuilder
WARNING: Please consider reporting this to the maintainers of io.mockk.proxy.jvm.ClassLoadingStrategyChooser
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

Not sure if it’s related, but four tests then fail with NoClassDefFoundException: io/mockk/proxy/jvm/advice/jvm/JvmMockKProxyInterceptor

Hi. I am working on mobile kmm project. (ios + android) As per my understanding there is no way right now to import mockk into commonTest module, as it targets kotlin native as well. I am wondering: 1. Am I wrong? 2. What is the idea of io.mockk:mockk-common then? The documentation reference this dependency for Common Multiplatform.

Is anyone successfully running an Espresso KoinTest that injects a mocked (with mockk) ViewModel via stateViewModel? Is there a trick to getting around getTag needing to return SavedStateHandleController? I am using koin 3.0.1 and mock 1.11.0

Hi, Is there a difference between

mockk<T>(relaxed = true)

vs.

spyk

? I tend to think of them as the same and use the former is useful for when there is a default constructor and the the latter if I need to pass properties to a constructor, and otherwise think they end up the same…. but maybe I am wrong?

Getting

Caused by: io.mockk.MockKException: Failed matching mocking signature for
SignedCall(retValue=java.lang.Object@32bb09d9, isRetValueMock=true, retType=class kotlin.Any, self=UseCase(#25), method=execute(Any, Continuation), args=[kotlin.Unit, Continuation at com.expediagroup.ord.fbs.usecase.UseCaseExecutorTest$2$1.invokeSuspend(UseCaseExecutorTest.kt:47)], invocationStr=UseCase(#25).execute(kotlin.Unit, continuation {}))
left matchers: [any()]

what could be the issue…

Hi, I just ran into a very tricky problem. I had a mock of an extension function from a test which ended up recording millions of method calls, which ultimately led the test execution to hang completely. In my case I had also forgot to clear mocks at one point, which made the hang happen in a completely different test which didn't make it obvious that the problem was related to a mock at all. Posting here to get some input before possibly filing an issue on 😮ctocat: I think it would be reasonable that mockk had a (configurable) cap of the amount of recorded invocations, and any further calls throws an exception. The cap should be sufficiently low to not cause an extreme slowdown of tests before throwing exception.

I just added a dependency which pulled in slf4j and slf4j-android into my kotlin android project. It looks like JvmMockKGateway.Companion logs from its init {} block, and if slf4j is present, it uses slf4j. And with the slf4j-android binding present, slf4j will call into android.util.Log, which will raise an assertion error if it’s called from a unit test, when unmocked, resulting in an exception, resulting in a NoClassDefFoundError for JvmMockKGateway.

is there a way to work around this? And/or, am I doing something dumb? 😛

Setting up a mock like this causes problems because the x in every will not refer to the x on the mocked

Point

data class Point(val x: Int, val y: Int) 

val x = 7
val mockPoint = mockk<Point> { 
  every { x } returns x
}

If the receiver in the

every

block would be <T> (or Point in this case), I believe x would bind correctly, but perhaps that causes other issues?

Hello there! As far as I see in mockk documentation Inline functions cannot be mocked: https://github.com/mockk/mockk/issues/27 This issue is dated 2018. Wondering if anything has changed since then?

I'm trying to mock private properties from in a companion object. When I run the tests they throw an exception.

io.mockk.MockKException: can't find property workerHandler for dynamic property get