This sample app reproduces issue described here: https://stackoverflow.com/questions/51733707/weird-behavior-of-springboottest-based-spock-specifications/51740233#51740233
When SpecificMerchantCriterionPagedResourcesProcessorSpec is executed alone, it is successful.
When JmsSimulatedBusinessFailureSpec is executed alone, it is successful as well.
When SpecificMerchantCriterionPagedResourcesProcessorSpec and JmsSimulatedBusinessFailureSpec are executed in 1 batch in the mentioned order, JmsSimulatedBusinessFailureSpec fails as if FailureSimulator was not imported at all.
The thing is I can see that FailureSimulator is in ApplicationContext when I examine all beans and also aspect was recognized by Spring (can be seen in logs).
When I add @DirtiestContext annotation on SpecificMerchantCriterionPagedResourcesProcessorSpec and reexecute previous batch, it works.
So by putting annotation on a test which doesn't fail, I fix the other test.
This is how to run both tests in Intellij IDEA:
