Features/test deterministic guide return

[Andrei-Treil]

Increased coverage based on specification provided in issue #3358

Proposed Changes:

• Added 2 new parameters return_sites and use_determinisitic_guide with 2 values each
• Added assertions to check behavior when return_deterministic is true
  • When return_sites is empty, assert all deterministic guide sites are returned
  • When return_sites contains only 1 of 2 deterministic guide sites, assert that correct site is returned
  • When there are no deterministic guide sites, assert behavior is the same as when return_deterministic is false
• Added assertion to check that no deterministic sites are returned when return_deterministic is false and there are deterministic sites in the guide
• Added checks to verify correct values of deterministic guide sites "w4" and "w5" when returned depending on behavior specified above

Notes:

• All (32) test cases pass locally
  • Unsure if including with_plate and event_shape parameters is necessary, kept them in for now
• Assumed expected values of deterministic guide sites was to match Y
• Was unable to fully pass mypy tests when running "make test" due to non-utf encoding present in PyTorch (PyTorch issue #124897)
  • "make format", "make lint", and running pytest on test_predictive.py all succeeded

[OlaRonning]

Hi @ Andrei-Treil,
I'm sorry for not getting back to you sooner; I must have missed the notification when your PR was opened. Your test looks good. Thanks for the help!

[Andrei-Treil]

Hi @OlaRonning,
No worries, glad I could help!