CHORE: Adds test coverage reports

[nasubbia]

Description

Adds pytest-cov to generate test coverage report.

Fixes # (issue)

• Fixes test runs. Adds venv path to flake8 exclusion list.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• Run make test
• After the tests are run, open index.html under htmlcov folder to see the test coverage report

Test Configuration:

• Firmware version:
• Hardware:
• Toolchain:
• SDK:

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas - N/A
• I have made corresponding changes to the documentation - N/A test coverage is run as part of the current test command
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules - N/A

[cboffa13]

Is there a way so set the coverage threshold to what it is now and then we can slowly add more tests til we reach the 80% mark?

[nasubbia]

Is there a way so set the coverage threshold to what it is now and then we can slowly add more tests til we reach the 80% mark?

yes, currently we're at 72% coverage. I've added that as the current threshold