Mockk Missing calls inside every { ... } block

Question

I'm stuck trying to mock some stuff with mockk:

I have the following setup on gradle

root:
  |-- App (just a sample app for the SDK)
  |-- SDK (SDK we develop) << apply plugin: 'com.android.library'
       |-- SDKimpl.kt
  |-- Foo (wrapper around a .jar library) << apply plugin: 'com.android.library'
       |-- Foo.kt

So I'm writing an androidTest for the SDK and trying to mock Foo.kt. There's nothing unusual about Foo class, just direct class Foo(private val someParams) {

So using androidTestImplementation "io.mockk:mockk-android:1.8.13" the mock goes:

val mock: Foo = mockk()
// val mock: Foo = mockkClass(Foo::class) // also tried this
every { mock.getData() } returns listOf("1", "2", "3")

I'm always getting the following crash:

io.mockk.MockKException: Missing calls inside every { ... } block.
at io.mockk.impl.recording.states.StubbingState.checkMissingCalls(StubbingState.kt:14)
at io.mockk.impl.recording.states.StubbingState.recordingDone(StubbingState.kt:8)
at io.mockk.impl.recording.CommonCallRecorder.done(CommonCallRecorder.kt:42)

Also tried just to gather information:

running inside JVM test folder. It gets mocked without issues, but I can't run my test as JVM
running androidTest inside Foo module. Got the same crash
using mockkClass(Foo::class). Got some crash
using annotation @MockK and MockKAnnotations.init(this). Got some crash.
added Log.d before every { line and inside getData() method and it seems the actual real method from the class is getting called during the mock setup. That seems super weird to me.

Any idea what's going wrong here?

edit:

as requested, full code. I'm current working on an isolated project to try to isolate the error, so Foo is just:

class Foo {

    fun getData(): String {
        Log.d(TAG, "invoked foo.getData()")
        return "trolololo"
    }

}

and then I have FooTest in androidTest:

class FooTest {

    @Test
    fun mock_foo() {
        val foo = mockk<Foo>()
        every { foo.getData() } returns "zero"
        assertEquals("zero", foo.getData())
    }

}

score 21 · Accepted Answer · answered Dec 24 '18 at 17:07

21

It seems to be a Mockk opened issue: https://github.com/mockk/mockk/issues/182

2 possible quick fixes (pick one):

Run the Instrumented Tests in an emulator >= Android-P
Set Foo class as open (and the method(s) you want to mock too)

answered Dec 24 '18 at 17:07

Phil

4,730
1
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39

score 20 · Answer 2 · answered May 17 '19 at 13:25

20

Try to check the official guide and see what is missing.

In my case, I tried to mock an extension in Kotlin but missed the mockkStatic

fun Date.asMyTime() : DateTime = DateTime(this, DateTimeZone.getDefault())

mockkStatic("packageName.FileNameKt") // This is what I was missing
every {
    DateTime().asMyTime()
} returns mock(DateTime::class.java)

answered May 17 '19 at 13:25

Allen

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34

Thanks for `mockkStatic("packageName.FileNameKt")` when test extension method! Did you mean `mockk`, not `mock` in the last line? – CoolMind Mar 31 '22 at 23:04
1

Instead of `mockkStatic("packageName.FileNameKt")` you can write: `mockkStatic(FileName::class.java.name + "Kt")`. – CoolMind Apr 01 '22 at 14:40

score 16 · Answer 3 · answered Apr 02 '20 at 22:45

16

In my case I forgot to spyk the class I was applying every {...} to.

val presenter = spyk(MyPresenter())

every { view.myFun(any()) } returns Unit

answered Apr 02 '20 at 22:45

Tom

6,946
2
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63

Can we add `any()` to `spyk` – Akshay Hazari Dec 23 '21 at 07:13
4

@AkshayHazari `spyk` is used to add mocking and verification abilities to "real" objects. Anything that can be done with `mockk`s can be done on `spyk`'d objects, such as `every{}`, `verify{}` etc. – Tom Dec 28 '21 at 22:33

score 7 · Answer 4 · answered Jun 03 '20 at 11:24

7

In my case, I've missed

@Before
fun setUp() {
    MockKAnnotations.init(this)
}

answered Jun 03 '20 at 11:24

Aneczka

79
1
1

score 7 · Answer 5 · answered Nov 16 '20 at 13:08

7

In my case I tried to mock using mock() function instead mockk() (double k)

answered Nov 16 '20 at 13:08

Sergey Bulavkin

2,325
2
17
26

tonisives · Answer 6 · 2020-11-10T02:53:02.850

4

Make sure the object is really a mock, not the real object.

For instance:

- Sdk sdk = Sdk()
+ Sdk sdk = mockk()
  every { sdk.crypto } returns mockk()

edited Nov 10 '20 at 02:53

answered Nov 10 '20 at 02:26

tonisives

1,962
1
18
17

score 4 · Answer 7 · answered Jan 03 '22 at 09:16

My problem was that I used a java class without getters

public class KeyStorePasswordPair {
    public KeyStore keyStore;
    public String keyPassword;

    public KeyStorePasswordPair(KeyStore keyStore, String keyPassword) {
        this.keyStore = keyStore;
        this.keyPassword = keyPassword;
    }
}

I needed to add getters for the variables to make mockking work:

public class KeyStorePasswordPair {
    public KeyStore getKeyStore() {
        return keyStore;
    }

    public String getKeyPassword() {
        return keyPassword;
    }

    private KeyStore keyStore;
    private String keyPassword;

    public KeyStorePasswordPair(KeyStore keyStore, String keyPassword) {
        this.keyStore = keyStore;
        this.keyPassword = keyPassword;
    }
}

Balu · Answer 8 · 2023-03-27T08:09:04.033

Mockk Missing calls inside every { ... } block

may also be thrown when you have an every block defined on an object that is not a mockk, for example:

You define stub behavior like this

every { foo.getData() } returns DATA

and then try to:

every { DATA.getVersion() } returns VERSION

Where DATA and VERSION objects are declared (and instantiated) in the test class.

The error message is not very informative and a bit misleading in that case.

score -5 · Answer 9 · answered Mar 03 '21 at 10:15

-5

try like this

`when`(mock.getData()).thenReturn(listOf("1", "2", "3"))

answered Mar 03 '21 at 10:15

Ankitech

9
1
3

2

`when` is not a function of Mockk – Douglas Mesquita Mar 21 '22 at 13:59
@DouglasMesquita, agree, it is Mockito. – CoolMind Mar 25 '22 at 14:30

Mockk Missing calls inside every { ... } block

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