Added PubSub KeyFrameCount and DeltaFrame tests

[mrsuciu]

Proposed changes

Added tests which include PubSub KeyFrameCount and DeltaFrames.

Related Issues

• Fixes #

Types of changes

What types of changes does your code introduce? Put an x in the boxes that apply. You can also fill these out after creating the PR.

• [ ] Bugfix (non-breaking change which fixes an issue)
• [ ] Enhancement (non-breaking change which adds functionality)
• [x] Test enhancement (non-breaking change to increase test coverage)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected, requires version increase of Nuget packages)
• [ ] Documentation Update (if none of the other choices apply)

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code.

• [x] I have read the CONTRIBUTING doc.
• [x] I have signed the CLA.
• [x] I ran tests locally with my changes, all passed.
• [ ] I fixed all failing tests in the CI pipelines.
• [ ] I fixed all introduced issues with CodeQL and LGTM.
• [ ] I have added tests that prove my fix is effective or that my feature works and increased code coverage.
• [ ] I have added necessary documentation (if appropriate).
• [ ] Any dependent changes have been merged and published in downstream modules.

Further comments

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 54.72%. Comparing base (d4f1d40) to head (e55bfc4).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2579 +/- ## ========================================== + Coverage 54.59% 54.72% +0.13% ========================================== Files 342 342 Lines 65044 65044 Branches 13331 13331 ========================================== + Hits 35511 35597 +86 + Misses 25681 25600 -81 + Partials 3852 3847 -5 ```

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