[SYCL][Graph] Add tests checking event status querying

[mfrancepillois]

Checks the info::event_command_status on an event returned from graph submission.

Closes Issue: #95

[EwanC]

LGTM, one very minor comment

[Bensuo]

LGTM

[julianmi]

I think these tests are an useful addition. Do we only want to verify the event info though? Couldn't we call a host kernel that waits a short time instead? This would simplify the tests and make the expected two states of the event reproducible.

[mfrancepillois]

I think these tests are an useful addition. Do we only want to verify the event info though? Couldn't we call a host kernel that waits a short time instead? This would simplify the tests and make the expected two states of the event reproducible.

This PR addresses Issue #95.
This issue requires users to be able to get status info on event return from graph submission.
We found that this behaviour is already supported by the default implementation.
We therefore only added tests that check this by displaying event status.

Using a host_task is indeed a good idea, but unfortunately this feature is not supported by the graph implementation at the moment.

[julianmi]

I think these tests are an useful addition. Do we only want to verify the event info though? Couldn't we call a host kernel that waits a short time instead? This would simplify the tests and make the expected two states of the event reproducible.

This PR addresses Issue #95. This issue requires users to be able to get status info on event return from graph submission. We found that this behaviour is already supported by the default implementation. We therefore only added tests that check this by displaying event status.

Using a host_task is indeed a good idea, but unfortunately this feature is not supported by the graph implementation at the moment.

I am okay with merging this as it is. We might want to add an issue though to make these tests reproducible and simplify them in the future. E.g., a long counting loop could do the trick as well.