For a while now, we have seen an increase in problems/incompatibilities with recent versions of the JDK due to our usage of JVM-internal API.
Most notably, JDK 17 made some changes which are incompatible with the current subclass mockmaker.
Therefore, to prepare for the future of JDK, we are making some core changes to ensure Mockito keeps on working.
Switch the default mockmaker to mockito-inline
Back in Mockito 2.7.6, we published a new mockmaker based on the "inline bytecode" principle.
This mockmaker creates mocks manipulating bytecode equivalent within the original class such that its method implementations hook into the normal Mockito machinery.
As a comparison, the subclass mockmaker generates "real" subclasses for mocks, to mimic the same behavior.
While the approaches are similar, the inline mockmaker avoids certain restrictions that the JDK imposes.
For example, it does not violate module boundaries (introduced in JDK 9, but more heavily used in JDK 17) and avoids the leaking of the creation of the subclass.
Massive thanks to community member @reta who implemented this change.
Note: this does not affect mockito-android nor testing on Android.
When should I still be using the subclass mockmaker?
There are legitimate remaining use cases for the subclass mockmaker.
For example, on the Graal VM's native image, the inline mockmaker will not work and the subclass mockmaker is the appropriate choice.
Additionally, if you would like to avoid mocking final classes, using the subclass mockmaker is a possibibility.
Note however that if you solely want to use the subclass mockmaker to avoid mocking final, you will run into the above mentioned issues on JDK 17+.
We want to leave this choice up to our users, which is why we will keep on supporting the subclass mockmaker.
If you want to use the subclass mockmaker instead, you can use the new mockito-subclass artifact (published on Maven Central along with all our other artifacts).
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Commits
19ab3ea Fixes some mistakes and missing details in documentation (#2889)
b47bab2 Bump com.diffplug.spotless from 6.13.0 to 6.14.0 (#2888)
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dependabot[bot]
commented
1 year ago
Bumps mockito-core from 2.23.0 to 5.1.0.
Release notes
Sourced from mockito-core's releases.
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Commits
19ab3eaFixes some mistakes and missing details in documentation (#2889)b47bab2Bump com.diffplug.spotless from 6.13.0 to 6.14.0 (#2888)4775c67Clean up JDK-8 related code (#2883)91223f8Feat: reified mock overloads (#2882)96452faMake sure the tests use mock maker with intended member accessor (#2872)1418769Bump assertj-core from 3.24.1 to 3.24.2 (#2875)f4d7c34Bump com.diffplug.spotless from 6.12.1 to 6.13.0 (#2871)23e344eRemove broken link fromCONTRIBUTING.md(#2870)f2a47c3Improve examples for InOrder (#2843)484de45Update release badge to 5.x (#2869)Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
@dependabot rebase.Dependabot commands and options
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