Files
litellm/tests/test_litellm
michelligabrieleandGitHub c47f77a348 fix(agentcore): handle JSON responses from agents using sync return (#23165)
* fix(agentcore): handle JSON responses from agents using sync return

BedrockAgentCoreApp agents that use synchronous `return` (instead of
async `yield`) respond with Content-Type: application/json instead of
text/event-stream. The streaming parser only handles SSE format, silently
discarding the JSON body and returning empty content to the client.

This adds Content-Type detection in both sync and async streaming
wrappers — when application/json is received, the response is parsed
and converted to a single-chunk stream. Also extends _parse_json_response
with a fallback chain supporting multiple agent response schemas (standard
AgentCore, Strands framework, plain string, raw JSON fallback).

* fix(agentcore): add dict-type guard to _parse_json_response

Prevent AttributeError when json.loads() returns a non-dict
(e.g. JSON array or primitive) by adding an isinstance check
at the top of _parse_json_response. Non-dict values fall back
to raw JSON string content.

* fix(agentcore): handle malformed JSON and split streaming chunks

- Wrap json.loads() in try/except in both sync and async streaming
  wrappers so malformed JSON bodies raise a structured BedrockError
  instead of a raw JSONDecodeError
- Split the JSON-fallback streaming path into two chunks (content
  chunk with finish_reason=None, then stop sentinel with empty delta)
  to match the SSE path convention

* fix(agentcore): catch IO errors in streaming JSON path + async error test

- Broaden except clause to catch both json.JSONDecodeError and IO-level
  exceptions (httpx.ReadError, etc.) from response.read()/aread(), so
  all failures surface as structured BedrockError
- Add async malformed-JSON test to mirror the sync test coverage
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Testing for litellm/

This directory 1:1 maps the the litellm/ directory, and can only contain mocked tests.

The point of this is to:

  1. Increase test coverage of litellm/
  2. Make it easy for contributors to add tests for the litellm/ package and easily run tests without needing LLM API keys.

File name conventions

  • litellm/proxy/test_caching_routes.py maps to litellm/proxy/caching_routes.py
  • test_<filename>.py maps to litellm/<filename>.py