Verification of a deep mock via mockContstructor fails - kotlin

Question

In a test I want to verify that a model would call a client when a method of this model is called.
The class under test - the model class - is an object singleton. (KubernetesResourceModel.kt)
object KubernetesResourceModel {
…
private fun createClient(): NamespacedKubernetesClient {
return DefaultKubernetesClient(ConfigBuilder().build())
}
The actual call to the client - DefaultKubernetesClient - happens in an instance variable within KubernetesResourceModel (Cluster.kt)
class Cluster(val client: NamespacedKubernetesClient) {
...
private fun loadAllNameSpaces(): Sequence<Namespace> {
return client.namespaces().list().items.asSequence()
}
In my test I stub the client and then verify that a call to the client library is executed when KubernetesResourceModel.getAllNamespaces is called, (KubernetesResourceModelTest.kt):
#Test
fun `should call list namespaces on client`() {
// given
mockClient(emptyList())
// when
KubernetesResourceModel.getAllNamespaces()
// then
verify { anyConstructed<DefaultKubernetesClient>().namespaces().list().items }
}
...
private fun mockClient(namespaces: List<Namespace>) {
// client.namespaces().list().items.asSequence()
mockkConstructor(DefaultKubernetesClient::class)
every { anyConstructed<DefaultKubernetesClient>().namespaces() } returns
spyk {
every { list() } returns
spyk {
every { items } returns
namespaces
}
every { watch(any()) } returns
mockk()
}
The mocking works and I see KubernetesResourceModel.getAllNamespaces() returning the empty list that I passed along when mocking (mockClient(emptyList())).
Unfortunately the verification
verify { anyConstructed<DefaultKubernetesClient>().namespaces().list().items } (KubernetesResourceModelTest.kt)
fails telling me that no call on client.namespaces().list() happened:
Verification failed: call 2 of 3: NonNamespaceOperation(child of mockkConstructor<DefaultKubernetesClient>()#1).list()) was not called
java.lang.AssertionError: Verification failed: call 2 of 3: NonNamespaceOperation(child of mockkConstructor<DefaultKubernetesClient>()#1).list()) was not called
at io.mockk.impl.recording.states.VerifyingState.failIfNotPassed(VerifyingState.kt:66)
at io.mockk.impl.recording.states.VerifyingState.recordingDone(VerifyingState.kt:42)
at io.mockk.impl.recording.CommonCallRecorder.done(CommonCallRecorder.kt:47)
at io.mockk.impl.eval.RecordedBlockEvaluator.record(RecordedBlockEvaluator.kt:60)
at io.mockk.impl.eval.VerifyBlockEvaluator.verify(VerifyBlockEvaluator.kt:30)
at io.mockk.MockKDsl.internalVerify(API.kt:118)
at io.mockk.MockKKt.verify(MockK.kt:139)
at io.mockk.MockKKt.verify$default(MockK.kt:136)
at org.jboss.tools.intellij.kubernetes.model.KubernetesResourceModelTest.should call list namespaces on client(KubernetesResourceModelTest.kt:32)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:110)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:38)
at org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:62)
at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:118)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch
Any idea what I am missing?