DOC: <Issue related to /evaluation/tutorials/testing>

[labdmitriy]

Thank you for tutorial!

I had the following issues while trying to reproduce it:

• Some variables in test 4 (like search_results and answer_and_docs are not properly formatted
• Grade class for test 4 has the typo in the field description (frounded instead of grounded) and after correction even gpt-4o-mini is working correctly as judge
• If I try to run pytest --output=ls . (my test file is in the same directory as the application), then I have the following output:

Collecting tests...
Running tests...


no tests ran in 32.96s

But I can see new test traces in LangSmith and executing pytest . shows that it can find and run tests successfully.