make integration tests more robust

[geyslan]

Description

• We only have a few tests for multi-scope. Since it touches many layers, we need to create a robust test suite.
• Integration tests lack support for testing more event filter types. Building a more specialized test suite is a must.

[rafaeldtinoco]

For the integration tests, please be aware of: #1681 (comment) when adding tests that rely in PID=1. Cheers!

[geyslan]

For the integration tests, please be aware of: #1681 (comment) when adding tests that rely in PID=1. Cheers!

OK. But if we run the integration test in a container just to not touch the host pid 1, that process will be a shell (for example)... so I think running tests just to filter the pid 1 that way doesn't make sense. It's the same of test against pid=whatever.

[rafaeldtinoco]

so I think running tests just to filter the pid 1 that way doesn't make sense. It's the same of test against pid=whatever.

Sorry, I did not make myself clear, I just wanted to bring awareness to the issue, not to run tests inside a container as a suggestion!