test(bigtable): disable deep stub answers causing Java 8 Mockito reflection crash#13831
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This pull request removes the unused org.mockito.Answers import and simplifies several @Mock annotations in BigtableDataClientTests.java by removing the (answer = Answers.RETURNS_DEEP_STUBS) configuration. There are no review comments to address, so no additional feedback is provided.
sonykhan120595-dotcom
approved these changes
Jul 20, 2026
nnicolee
marked this pull request as ready for review
July 20, 2026 14:42
mutianf
approved these changes
Jul 20, 2026
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Problem
In JSpecify 1.0.0, the
@NullMarkedannotation targetsElementType.MODULE. BecauseElementType.MODULEwas introduced in Java 9, reflecting on@NullMarkedclasses under Java 8 (JDK 1.8) throwsEnumConstantNotPresentExceptionProxywrapped in anArrayStoreException.In
BigtableDataClientTests, Mockito's mock declarations forServerStreamingCallablewere configured withanswer = Answers.RETURNS_DEEP_STUBS. When Mockito generates deep stubs, it dynamically reflects on the return type to build intermediate mocks, triggering this reflection crash on@NullMarkedclasses under Java 8 CI pipelines.Solution
Since the tests do not actually call or rely on deep stubs for these streaming callables, we can safely remove
(answer = Answers.RETURNS_DEEP_STUBS). Removing deep stubs prevents Mockito from performing the reflection that causes the Java 8 pipeline crash, allowing the test suite to execute successfully.