Increased test coverage for ChatAdapter

[JHMuir]

Fixes for #8120

Adds 3 new tests to ChatAdapter:

• test_chat_adapter_with_pydantic_models(): Validates and ensures that ChatAdapter can use Pydantic models as inputs and outputs, nested or basic

• test_chat_adapter_signature_information(): Ensures that the signature information sent with ChatAdapter follows an expected structure and format

• test_chat_adapter_exception_raised_on_failure() : Ensures that a specific error is called upon failure

All tests were passed. If there are any changes you'd like me to make, please let me know! More than happy to contribute.

[chenmoneygithub]

Thank you for the PR! Left a comment on potential improvements.

[chenmoneygithub]

We should avoid defining class of name InputField. Although this is just unit test, our users could use it as sample code to follow.

Would you mind refactoring the test case following the json adapter example?

dspy/tests/adapters/test_json_adapter.py

Line 110 in ffb415f

def test_json_adapter_on_pydantic_model():

[JHMuir]

Pushed some small changes, lmk how they look!

[chenmoneygithub]

code looks good to me! Would you mind rebasing from main branch so that we can merge?

[JHMuir]

Rebased, everything is clean

[chenmoneygithub]

@JHMuir thanks! Looks like there is a failed test case:

FAILED tests/adapters/test_chat_adapter.py::test_chat_adapter_exception_raised_on_failure - dspy.utils.exceptions.AdapterParseError: Adapter ChatAdapter failed to parse the LM response. 

LM Response: {'output':'mismatched value'} 

Expected to find output fields in the LM response: [answer] 

Actual output fields parsed from the LM response: []
= 1 failed, 362 passed, 194 skipped, 2 xfailed, 17 warnings in 87.31s (0:01:27) =

Does it pass locally for you?

[chenmoneygithub]

LGTM, thanks for the contribution!

[JHMuir]

Ah yeah I didn't see that ChatAdapter added a new explicit error... I was about to push my quick change when I saw you already did. Thank you for merging and all your help :)

[chenmoneygithub]

@JHMuir No problem! Btw I think you are the contributor #300 of DSPy 😄