test: 100% coverage in get-options-overrides (createFilter)

[agilgur5]

Summary

Get 100% coverage of get-options-overrides by adding tests for remaining parts of createFilter

Follow-up to #321 (comment) (plus more stuff too)

Details

• get the skipped test to work by using absolute paths, as that is what the filter function expects (and is how it is used in this codebase)

  • use the same helper func on the main createFilter test as well to ensure that we're consistently testing the same paths
    • (though **/* basically matches everything)

• add a test for project references as well

  • and remove the **/* from the include for this so it doesn't match everything
    • this also tests the single string include code path as well

• add a test for the context.debug() statements as well

  • couldn't get to "100% Funcs" coverage without this
  • used a simplified mock instead of actually using RollupContext so that this doesn't rely on that file/unit to work

[agilgur5]

@ezolenko this PR wasn't quite complete -- note that CI was failing on Windows.

I had made the in-line comment above to follow-up on, but hadn't had a chance to re-visit this. You marked the comment as "resolved", but it had not been resolved yet (hence why CI hadn't passed).

I intended on writing a Windows workaround for the test and then making a different, isolated PR to fix the source issue (as this one is intended to just be a testing PR) here and for #321 (comment) (which are both in the same source file).

Since this was merged early, I'll try to get that PR fix out today so that CI passes on master on Windows.

I can't change PR settings myself, so you might want to change the settings to not allow PRs to be merged unless CI checks pass -- to prevent something like this in the future.

[agilgur5]

@ezolenko I fixed the root cause of the Windows failures in #331