What should be checked when testing interrupts?

When testing interrupts, it is important to verify:

• Correctness of interrupt handling: the system should respond correctly to the interrupt signal, completing or suspending operations without hangs.
• Absence of resource leaks: no open files, locks, or threads should remain after the interrupt.
• Stability of state: the application's state should remain consistent, without data corruption.
• Response time: the interrupt should be handled promptly, without significant delays.
• Repeatability: interrupts should be handled correctly upon repeated calls.

For example, when testing a multithreaded application, it is necessary to verify that the thread is correctly interrupted and releases resources, and that other threads are not blocked.