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litellm/tests/unit/llms
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rj-cairn d06b889d41
fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 
* fix(vertex_ai): split Gemini SSE lines on CR/LF only so U+2028 in text keeps the stream

The Gemini and Vertex AI streaming path read the SSE body with httpx
iter_lines()/aiter_lines(). Those follow str.splitlines(), which also breaks
on U+0085, U+2028, U+2029, \x0b, \x0c and \x1c-\x1e. JSON leaves U+0085,
U+2028 and U+2029 unescaped inside strings, so a data: line whose text holds
one of them was cut in two. The tail is not a data: line and the head never
parses, and the accumulate-and-retry fallback then carries the unparsed
prefix forward, so every later event is appended to it and the stream ends
with no more content and no usage.

SSE lines end only at CRLF, LF or CR. The new iter_sse_lines/aiter_sse_lines
split decoded text on exactly those, treating a CR at the end of one chunk and
an LF at the start of the next as one break. The first request and every
long-decode hop now read through them.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* fix(streaming): keep merged think tags balanced and split shared SSE lines only on CR/LF

Close an open <think> block on the first content or tool-call delta and at stream end, reopen it when reasoning returns, and route the shared chat completions stream through the SSE line splitter so U+2028 and U+2029 inside JSON no longer drop chunks.

* fix(streaming): exact-match the SSE [DONE] marker in BaseModelResponseIterator

* fix(streaming): split every SSE reader on CR/LF only and keep the logged think block closed

Switch the remaining httpx stream readers (Anthropic chat, Google GenAI,
Interactions, Codestral, openai_like, Predibase, LangGraph, Vertex Agent
Engine, A2A providers, Azure AI agents, sandboxes, the A2A endpoint, and
others) from iter_lines/aiter_lines to iter_sse_lines/aiter_sse_lines, so a
raw U+2028 or U+2029 inside a JSON string no longer splits an event.

Keep the chunk that closes a think block in the logged and cached response
when a stream ends without a finish_reason, close the block before a legacy
function_call, and make sync Codestral FIM streaming send stream=true and use
the text-completion-codestral stream parser.

Test fakes that only mocked iter_lines now stream real httpx bytes and
assert the content they feed in.

* fix(streaming): split buffered SSE parsers only on CR and LF, shard the codestral tests

Buffered SSE and JSONL parsers used str.splitlines(), which also breaks on
U+2028, U+2029 and U+0085 that JSON allows raw inside strings. They now use
split_sse_lines from sse_lines.py, which also gains a str.split fast path.
Adds tests/unit/llms/codestral to the unit workflow shard.

* fix(streaming): keep U+2028 in restamped Anthropic frames and fold CRLF before splitting SSE lines

* test: type the new stream tests, drop a comment, and benchmark the SSE line splitter

* test: type the iterator class parameters in the line-separator stream tests

* fix(responses): stream tool call arguments opened in a text chunk

* fix(responses): hold a tool call that shares a chunk with text until the text ends

* test: type the a2a SSE handler helper and the sandbox fake responses

---------

Co-authored-by: Tim Vink <vinktim@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: mateo-berri <277851410+mateo-berri@users.noreply.github.com>
Co-authored-by: michelligabriele <gabriele.michelli@icloud.com>
2026-10-28 17:00:29 -07:00
..
a2a chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
aiml chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
aiohttp_openai fix(aiohttp_openai): forward service_tier in transform_response (#47263) 2026-10-28 13:14:44 -07:00
anthropic fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
apiserpent test(unit): add package markers to migrated unit test directories 2026-09-20 11:53:14 +00:00
aws_polly fix(aws_polly): read the engine from the bare model name (#47963) 2026-10-23 18:10:51 -07:00
azure fix(azure): share one Entra token request per worker and audit #47348 (#48769) 2026-10-28 12:24:20 -07:00
azure_ai fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
base_llm fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
baseten fix(baseten): list current Model APIs instead of retired 2023 deployment IDs (#46945) 2026-10-19 16:40:13 +00:00
bedrock fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
bedrock_mantle fix(bedrock): resolve AWS region and secret lookups off the event loop (#47331) 2026-10-20 17:04:41 +00:00
black_forest_labs refactor(types): replace Any with proven types in 137 files (#44478) 2026-10-05 11:01:45 -07:00
brave chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
bytez test(unit): make every tests/unit directory a package so pytest collection is unique 2026-09-20 11:50:59 +00:00
cerebras test(unit): make every tests/unit directory a package so pytest collection is unique 2026-09-20 11:50:59 +00:00
chat fix(router): read the first stream chunk before returning so a failure before any token runs through the retry and fallback budget (#46493) 2026-10-14 14:19:25 -07:00
chatgpt fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
clarifai refactor(types): replace Any with proven types in 137 files (#44478) 2026-10-05 11:01:45 -07:00
claude_code refactor(types): replace Any with proven types in 137 files (#44478) 2026-10-05 11:01:45 -07:00
cloudflare fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
codestral fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
codex refactor(types): replace Any with proven types in 137 files (#44478) 2026-10-05 11:01:45 -07:00
cohere fix(cohere): map string stop parameter to list of strings for stop_sequences (#47091) 2026-10-27 19:01:54 -07:00
cometapi chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
compactifai refactor(typing): clear 1181 basedpyright Any errors across 431 files (#47789) 2026-10-24 11:31:09 -07:00
crusoe fix(crusoe): update base URL to current endpoint (#33121) 2026-10-15 19:10:58 -07:00
custom_httpx fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
dashscope feat(dashscope): add separate explicit and implicit cache pricing (#45567) 2026-10-20 04:54:35 +00:00
databricks fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
dataforseo chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
datarobot test(unit): make every tests/unit directory a package so pytest collection is unique 2026-09-20 11:50:59 +00:00
deepagents feat: add litellm.agent() to run claude code, codex, opencode and deep agents through the ai gateway (#43885) 2026-10-01 22:27:49 +00:00
deepgram refactor(typing): clear 1181 basedpyright Any errors across 431 files (#47789) 2026-10-24 11:31:09 -07:00
deepinfra refactor(llms): expose public names for private provider helpers (#45037) 2026-10-07 08:49:25 -07:00
deepseek refactor(anthropic): rename llms/anthropic/pass_through to llms/anthropic/messages (#48510) 2026-10-27 10:08:25 -07:00
docker_model_runner test(unit): make every tests/unit directory a package so pytest collection is unique 2026-09-20 11:50:59 +00:00
duckduckgo chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
e2b refactor(types): replace Any with proven types in 137 files (#44478) 2026-10-05 11:01:45 -07:00
edenai feat: generate provider_endpoints_support.json from the cost map (#48619) 2026-10-27 12:06:55 -07:00
elevenlabs fix(elevenlabs): map wav and pcm TTS formats to 24kHz output formats (#48455) 2026-10-26 13:42:01 -07:00
exa_ai fix(exa): return highlights, highlight scores, score and the response envelope from Exa search (#47423) 2026-10-19 15:45:56 -07:00
fal_ai chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
fastcrw fix(llms): sanitize trailing slashes in provider get_complete_url (#42887) 2026-10-15 02:59:46 -07:00
featherless_ai refactor(llms): expose public names for private provider helpers (#45037) 2026-10-07 08:49:25 -07:00
firecrawl fix(llms): sanitize trailing slashes in provider get_complete_url (#42887) 2026-10-15 02:59:46 -07:00
fireworks_ai fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
friendliai fix(friendliai): drop litellm-internal message fields before sending (#45092) 2026-10-20 01:22:07 +00:00
gdc test: move tests/test_litellm/llms into tests/unit/llms (#43191) 2026-09-25 12:43:23 -07:00
gemini fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
gigachat fix(llms): sanitize trailing slashes in provider get_complete_url (#42887) 2026-10-15 02:59:46 -07:00
github_copilot refactor(anthropic): rename llms/anthropic/pass_through to llms/anthropic/messages (#48510) 2026-10-27 10:08:25 -07:00
google_pse chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
gradient_ai fix(llms): sanitize trailing slashes in provider get_complete_url (#42887) 2026-10-15 02:59:46 -07:00
groq fix(groq): allow streamed reasoning replies in history (#47931) (#48268) 2026-10-25 00:52:01 +00:00
heroku fix(llms): sanitize trailing slashes in provider get_complete_url (#42887) 2026-10-15 02:59:46 -07:00
hosted_vllm test: migrate tests/llm_translation into unit, integration and e2e tiers (#45759) 2026-10-11 07:58:53 +00:00
huggingface fix(huggingface): stop forcing truncate=false on TEI rerank and pass truncate params through (#48706) 2026-10-28 09:27:26 -07:00
hyperbolic refactor(llms): expose public names for private provider helpers (#45037) 2026-10-07 08:49:25 -07:00
inception refactor(llms): expose public names for private provider helpers (#45037) 2026-10-07 08:49:25 -07:00
infinity chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
jina_ai fix(llms): sanitize trailing slashes in provider get_complete_url (#42887) 2026-10-15 02:59:46 -07:00
lambda_ai test: move the unit half of 126 mixed legacy files into tests/unit (#45090) 2026-10-07 14:07:43 -07:00
langflow fix(ci): stop stale CI reds, keep unit tests off the host env, retry CyberArk policy conflicts (#43294) 2026-09-26 09:25:13 -07:00
langgraph fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
laya feat: add Bespoke Nimble gateway and OSS classifier support (#44246) 2026-10-02 19:37:08 -07:00
lemonade chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
linkup fix(llms): sanitize trailing slashes in provider get_complete_url (#42887) 2026-10-15 02:59:46 -07:00
litellm_proxy refactor(mcp): drop the experimental label from the MCP server and client paths (#48513) 2026-10-27 17:47:50 +00:00
llamafile refactor(llms): expose public names for private provider helpers (#45037) 2026-10-07 08:49:25 -07:00
lm_studio refactor(llms): expose public names for private provider helpers (#45037) 2026-10-07 08:49:25 -07:00
manus test: migrate SDK and proxy-booting legacy CircleCI tests to their tiers (#45758) 2026-10-11 00:17:21 -07:00
meta fix(realtime)!: keep turn_detection.type when a transcript guardrail disables auto-response (#44939) 2026-10-16 15:24:40 +00:00
meta_llama refactor(llms): expose public names for private provider helpers (#45037) 2026-10-07 08:49:25 -07:00
microsoft_365_copilot refactor(anthropic): rename llms/anthropic/pass_through to llms/anthropic/messages (#48510) 2026-10-27 10:08:25 -07:00
milvus test: migrate legacy unit dirs and unrun folders into tests/unit, tests/integration and tests/e2e (#45940) 2026-10-11 06:24:57 -07:00
minimax feat(minimax): add MiniMax-H3 and H3-Max video generation via /v1/videos (#43705) 2026-10-15 05:48:36 -07:00
mistral fix(mistral): replay assistant reasoning as a Mistral thinking chunk (#48778) 2026-10-28 11:41:33 -07:00
modelscope fix(llms): sanitize trailing slashes in provider get_complete_url (#42887) 2026-10-15 02:59:46 -07:00
mongodb test(unit): make every tests/unit directory a package so pytest collection is unique 2026-09-20 11:50:59 +00:00
moonshot fix(llms): sanitize trailing slashes in provider get_complete_url (#42887) 2026-10-15 02:59:46 -07:00
morph feat(morph): support open models and cached input pricing (#48676) 2026-10-27 18:06:14 -07:00
nadir test: move tests/test_litellm/llms into tests/unit/llms (#43191) 2026-09-25 12:43:23 -07:00
nebius test: move tests/test_litellm/llms into tests/unit/llms (#43191) 2026-09-25 12:43:23 -07:00
neosantara refactor(llms): expose public names for private provider helpers (#45037) 2026-10-07 08:49:25 -07:00
nimble test: move whole-unit legacy test files into tests/unit and delete dead skips (#44807) 2026-10-07 05:02:28 +00:00
nlp_cloud chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
novita test(unit): make every tests/unit directory a package so pytest collection is unique 2026-09-20 11:50:59 +00:00
nscale test(unit): make every tests/unit directory a package so pytest collection is unique 2026-09-20 11:50:59 +00:00
nvidia_nim fix(openai): send chat completions through client.post so the SDK's per-message param transform stops holding the event loop (#46967) 2026-10-16 18:06:01 -07:00
nvidia_riva feat(nvidia_riva)!: add riva_offline mode for offline-only ASR models (#41021) 2026-10-20 23:03:56 +00:00
oci fix(oci): drop non-function tools under drop_params and gate reasoning_effort on declared levels (#40732) 2026-10-15 22:20:02 +00:00
ocr test(unit): make every tests/unit directory a package so pytest collection is unique 2026-09-20 11:50:59 +00:00
ollama fix(ollama): forward embedding credentials, headers and timeout (#48707) 2026-10-28 09:32:47 -07:00
oobabooga fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
openai fix(responses): preserve typed parts when logprobs is omitted (#48686) 2026-10-27 18:33:39 -07:00
openai_like fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
opencode fix(opencode): bill OpenCode Go requests from the reported list_cost (#48254) 2026-10-24 16:44:29 -07:00
openrouter chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
opensandbox chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
ovhcloud chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
parallel_ai test: add __init__.py to phase 12 unit test directories 2026-09-20 12:36:15 +00:00
parasail refactor(llms): expose public names for private provider helpers (#45037) 2026-10-07 08:49:25 -07:00
pass_through fix(guardrails): exclude litellm_metadata from pass-through guardrail scan text (#48276) 2026-10-26 12:07:58 -07:00
perplexity fix(responses): forward top-level moderation param to OpenAI (#48708) 2026-10-28 10:33:11 -07:00
pg_vector fix(security): remove the publicly known master key from the repo (#44718) 2026-10-06 10:55:24 -07:00
pi feat(harness): add pi harness for litellm.agent() (#45467) 2026-10-20 09:01:40 +00:00
publicai test: migrate tests/llm_translation into unit, integration and e2e tiers (#45759) 2026-10-11 07:58:53 +00:00
ragflow test: migrate legacy unit dirs and unrun folders into tests/unit, tests/integration and tests/e2e (#45940) 2026-10-11 06:24:57 -07:00
recraft refactor(types): replace Any with proven types in 137 files (#44478) 2026-10-05 11:01:45 -07:00
reducto test: move tests/test_litellm/llms into tests/unit/llms (#43191) 2026-09-25 12:43:23 -07:00
replicate chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
runwayml refactor(typing): clear 1181 basedpyright Any errors across 431 files (#47789) 2026-10-24 11:31:09 -07:00
s3_vectors test: add __init__.py to intermediate phase 12 unit test directories 2026-09-20 12:37:21 +00:00
sagemaker fix(streaming)!: send the include_usage chunk with an empty choices array (#47109) 2026-10-21 02:26:05 +00:00
sail test(e2e): align completion, SAIL, and spend-log fixtures with supported contracts (#43902) 2026-09-30 14:21:22 -07:00
sambanova chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
sap fix(sap): correctly handle cache_control (#39122) 2026-10-06 08:54:06 -07:00
scaledown feat(scaledown): add native text provider support (#44168) 2026-10-10 14:01:17 -07:00
scaleway test: migrate tests/llm_translation into unit, integration and e2e tiers (#45759) 2026-10-11 07:58:53 +00:00
searchapi chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
searxng chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
serper chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
snowflake fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
soniox feat(soniox): decode proxy form fields for context, translation and flags (#40605) 2026-10-16 06:37:34 +00:00
stability refactor(types): replace Any with proven types in 137 files (#44478) 2026-10-05 11:01:45 -07:00
strands_decider feat(strands_decider): call a Strands Decider on an AgentCore runtime ARN (#45678) 2026-10-09 22:51:19 -07:00
tavily fix(tavily): return raw_content, score, favicon and the response envelope from Tavily search (#48684) 2026-10-27 18:52:06 -07:00
tencent feat(tencent): add Seedream image generation and editing through TokenHub (#48735) 2026-10-28 15:53:00 -07:00
tinyfish test: move whole-unit legacy test files into tests/unit and delete dead skips (#44807) 2026-10-07 05:02:28 +00:00
together_ai fix(responses bridge): round-trip tool_search_call and tool_search_output items between turns (#46444) 2026-10-14 21:40:14 -07:00
tool_loop feat(harness): add Harness.TOOL_LOOP, a minimal in-process tool-calling loop (#44391) 2026-10-03 17:33:01 +00:00
topaz fix(llms): sanitize trailing slashes in provider get_complete_url (#42887) 2026-10-15 02:59:46 -07:00
triton fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
v0 test: move the unit half of 126 mixed legacy files into tests/unit (#45090) 2026-10-07 14:07:43 -07:00
valkey test: migrate legacy provider tests to tests/unit (wave 2, phase 13) 2026-09-20 14:18:49 +00:00
vercel_ai_gateway refactor(llms): expose public names for private provider helpers (#45037) 2026-10-07 08:49:25 -07:00
vertex_ai fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00
vllm fix(vllm): write spend log rows for /vllm passthrough calls to router models (#45733) 2026-10-14 12:40:48 -07:00
volcengine fix(openai): send chat completions through client.post so the SDK's per-message param transform stops holding the event loop (#46967) 2026-10-16 18:06:01 -07:00
voyage fix(llms): sanitize trailing slashes in provider get_complete_url (#42887) 2026-10-15 02:59:46 -07:00
wandb test: move tests/test_litellm/llms into tests/unit/llms (#43191) 2026-09-25 12:43:23 -07:00
watsonx chore(typing): clear 670 basedpyright Any errors by validating provider payloads at the boundary (#45388) 2026-10-13 15:35:23 -07:00
xai feat(search): add native xAI X Search support (#38505) (#48677) 2026-10-28 00:28:51 +00:00
xinference test: move whole-unit legacy test files into tests/unit and delete dead skips (#44807) 2026-10-07 05:02:28 +00:00
you_com test: migrate phase 14 wave 2 provider tests to tests/unit 2026-09-20 11:01:40 +00:00
zai test: add __init__.py to every tests/unit directory this migration touches 2026-09-20 11:52:09 +00:00
__init__.py test(unit): add package markers to migrated unit test directories 2026-09-20 11:53:14 +00:00
test_api_base_trailing_slash_routes.py fix(llms): join api_base and route with one shared helper (#47535) 2026-10-21 06:59:32 +00:00
test_cache_control_and_reasoning.py test: move tests/test_litellm/llms into tests/unit/llms (#43191) 2026-09-25 12:43:23 -07:00
test_custom_llm.py test: move whole-unit legacy test files into tests/unit and delete dead skips (#44807) 2026-10-07 05:02:28 +00:00
test_file_content_block.py refactor(llms): expose public names for private provider helpers (#45037) 2026-10-07 08:49:25 -07:00
test_file_search_responses.py fix(responses)!: count input tokens the way inference sends the request (#47363) 2026-10-20 15:13:59 +00:00
test_get_complete_url_trailing_slash.py refactor(anthropic): rename llms/anthropic/pass_through to llms/anthropic/messages (#48510) 2026-10-27 10:08:25 -07:00
test_lifecycle_fix.py refactor(llms): expose public names for private provider helpers (#45037) 2026-10-07 08:49:25 -07:00
test_oss_decision.py feat(decisions): add Laya and Bespoke providers to the Add Model form (#45260) 2026-10-14 08:11:11 -07:00
test_polling_url_origin_match.py test: move tests/test_litellm core utils, routing, responses, caching and rust_bridge into tests/unit (#43199) 2026-09-25 17:10:13 -07:00
test_predibase_transformation.py fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00