[FrameworkBundle] ensureKernelShutdown in tearDownAfterClass #60564
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This PR performs the following change: In
KernelTestCase, the kernel is shut down after every test, as per thestatic::ensureKernelShutdown()call in thetearDownfunction. However, if one was to perform any extra code in theirtearDownAfterClassand callgetContainer, it would boot up a new kernel, which would then be left dangling. The main issue with that is that when the next Test class is executed, there would already be a booted kernel, so it could happen that it was pointing to dangling resources.By adding this call to
static::ensureKernelShutdownin thetearDownAfterClass, we can ensure that no dangling kernels are left even after the test class has finished.