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Preserve method parameters when clearing inline mocks - #3847
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Track classes undergoing cache cleanup so retransformation restores method parameter metadata without reapplying mock instrumentation. Fixes mockito#3763
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #3847 +/- ##
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+ Coverage 86.89% 87.01% +0.11%
- Complexity 3062 3070 +8
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Files 344 344
Lines 9203 9216 +13
Branches 1138 1143 +5
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+ Hits 7997 8019 +22
+ Misses 918 911 -7
+ Partials 288 286 -2 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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I remember that we removed it again because it broke code coverage and other tools: #757 I think the only real fix for this is to update the JVM. |
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I (Claude) just tried on Java 19 and the bug is indeed fixed on the JDK as we reported it. So ideally you run on a JDK 21 or higher and you should be good. |
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Actually, it seems like the OpenJDK bug is not working. I replayed this patch with a modern version of Jacoco and it seems to work now. Probably we did not try to register forretransformation and that did not play well. There is however a bit of stray in the PR. private volatile Set<Class<?>> clearing = Collections.emptySet(); This will be a problem as transformation can happen in parallel. It is likely rare but if any, this should be a thread local. |
Isolate clearing retransformation from callbacks on other threads and remove the thread-local state in finally. Add a regression for concurrent transformation and cleanup.
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Looks good with the thread local changes. |
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### What changes were proposed in this pull request? This PR aims to upgrade `Mockito` to 5.24.0. Since `mockito-core` 5.24.0 declares the same dependencies as 5.23.0 (`byte-buddy` 1.17.7, `byte-buddy-agent` 1.17.7, and `objenesis` 3.3), only the `org.mockito:mockito-core` entry of `gradle/verification-metadata.xml` is changed. ### Why are the changes needed? To bring the latest bug fixes. - https://github.com/mockito/mockito/releases/tag/v5.24.0 (2026-09-23) - Fix data race in `InvocationContainerImpl.invocationForStubbing` (mockito/mockito#3819) - Fix non-deterministic `AssertionError` when using `MockMakers.SUBCLASS` (mockito/mockito#3795) - Fix `clearInlineMocks` not de-registering singleton mocks (mockito/mockito#3829) - Preserve method parameters when clearing inline mocks (mockito/mockito#3847) ### Does this PR introduce _any_ user-facing change? No. `Mockito` is a test-only dependency. ### How was this patch tested? Pass the CIs. ### Was this patch authored or co-authored using generative AI tooling? Generated-by: Claude Opus 5.5 Closes #903 from dongjoon-hyun/SPARK-59838. Authored-by: Dongjoon Hyun <dongjoon@apache.org> Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>
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Summary
Preserve explicit MethodParameters metadata when Mockito.clearAllCaches() removes inline instrumentation.
During cache clearing, tracked types were removed before retransformation, so the transformer could not restore parameter metadata on affected JVMs. Keep a short-lived snapshot of the types being cleared, run the existing parameter visitor for them, and skip mock advice so instrumentation is still removed.
Verification
Fixes #3763