Converting test_study to pytest

[prady0t]

I've made some conversions to the test_study_functions.py file, and it now only uses pytest. List of changes made:

• Removed the unittest.TestCase class structure
• Converted setUp / tearDown into pytest fixtures
• Replaced helper methods with fixtures
• Removed all uses of self
• Replaced unittest.assert* with plain assert
• Removed test wrapper methods & replaced with parametrization
• Moved shared utilities into conftest.py

Metadata

• Reference Issue: Migrate all unittests to pytest #1252
• New Tests Added:
• Documentation Updated:
• Change Log Entry:

Details

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 53.78%. Comparing base (24a4e8b) to head (f143c98).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1439   +/-   ##
=======================================
  Coverage   53.78%   53.78%           
=======================================
  Files          63       63           
  Lines        5230     5230           
=======================================
  Hits         2813     2813           
  Misses       2417     2417           

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.