Adding Code Coverage webserver code and Fix TypeError and AttributeError in Views.py

[andyjianzhou]

Improved code coverage in these following spaces in both Webserver and Core:

Run: Core: python scripts/cov/core_coverage.py
Run: Webserver: python scripts/cov/www_coverage.py

airflow/models/taskmap.py - Increased from 82% to 100% Coverage
airflow/www/widgets.py - Increased from 79% to 100% Coverage
airflow/www/views.py - Help increase Coverage from 78% to 85%
Related: #35127

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[boring-cyborg]

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[uranusjr]

You’ll need to revert the whitespace changes, they cause the linter to fail.

[andyjianzhou]

You’ll need to revert the whitespace changes, they cause the linter to fail.

Will do thanks!

[aritra24]

Looks fine to me, a few nits and questions

[RNHTTR]

@potiuk a test that seems to be completely unrelated to these changes is failing. Any recommendation here?

[potiuk]

@potiuk a test that seems to be completely unrelated to these changes is failing. Any recommendation here?

I re-run it (next time you can do it as well -> top-right re-run button with "re-run failed tests` dropdown.. Mssql server on linux has a tenedency to suddenly stop working and takes a lot of memory (one of the reasons we dumped mssql as backend as it was making our tests way flakier that they should be.

[boring-cyborg]

Awesome work, congrats on your first merged pull request! You are invited to check our Issue Tracker for additional contributions.