Stop event loop if exception is thrown from test

[trowski]

If the test method throws an exception or the promise returned from the test method fails, the loop is automatically stopped after 1 second and the test is failed, noting that the loop continued to run.

@kelunik Thoughts?

Fixes #8.

[prolic]

@kelunik @trowski I need this here merged and released. I work against this issue-8 branch for now. Thanks!

[prolic]

I tried this branch and I have a problem with it: Tests fail when an expected exception is thrown with something like this: An exception was thrown from the test method or promise returned from test method failed, but the event loop continued to run; Prooph\EventStore\Exception\StreamDeleted: Stream 'should_fail_appending_with_stream_exists_exp_ver_to_soft_deleted_stream' is deleted

[trowski]

@prolic That's because the loop is continuing to run after the test method throws (or promise fails). In other words, you still have active watchers in the loop after throwing.

[trowski]

We could also release it as 2.0.

@kelunik Yeah, let's do that. I pushed a new commit that fails any test if the loop continues to run after resolving. If we're going to go with another major, that would be even better I think. A test will explicitly have to allow the loop to continue running after resolving using AsyncTestCase::setTimeout().

In the meantime I'm going to tag a 1.3 that supports PHPUnit 9.

[enumag]

@kelunik @trowski Just ran into this problem as well. Took me quite a while to realize there was an exception which was hidden and the timeout exception was shown instead. Can this be merged?