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https://issues.apache.org/jira/browse/KAFKA-14682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17751125#comment-17751125
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Chris Egerton commented on KAFKA-14682:
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[~christo_lolov] were you still planning on working on this? If not, I can take
over.
> Unused stubbings are not reported by Mockito during CI builds
> -------------------------------------------------------------
>
> Key: KAFKA-14682
> URL: https://issues.apache.org/jira/browse/KAFKA-14682
> Project: Kafka
> Issue Type: Test
> Components: unit tests
> Reporter: Chris Egerton
> Assignee: Christo Lolov
> Priority: Major
>
> We've started using [strict
> stubbing|https://javadoc.io/static/org.mockito/mockito-core/4.6.1/org/mockito/junit/MockitoJUnitRunner.StrictStubs.html]
> for unit tests written with Mockito, which is supposed to automatically fail
> tests when they set up mock expectations that go unused.
> However, these failures are not reported during Jenkins builds, even if they
> are reported when building/testing locally.
> In at least one case, this difference appears to be because our [Jenkins
> build|https://github.com/apache/kafka/blob/6d11261d5deaca300e273bebe309f9e4f814f815/Jenkinsfile#L32-L35]
> uses the custom {{unitTest}} and {{integrationTest}} tasks defined in the
> project's [Gradle build
> file|https://github.com/apache/kafka/blob/6d11261d5deaca300e273bebe309f9e4f814f815/build.gradle#L452-L543],
> instead of the {{test}} task. Some IDEs (such as IntelliJ) may use the
> latter instead of the former, which can cause tests to fail due to
> unnecessary stubbings when being run in that IDE but not when being built on
> Jenkins.
> It's possible that, because the custom test tasks filter out some tests from
> running, Mockito does not check for unnecessary stubbings in order to avoid
> incorrectly failing tests that set up mocks in, e.g., a {{@BeforeEach}}
> method.
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