litellm/tests/test_litellm_rust/ocr/test_callbacks.py
Yujong Lee 1d88ca1cd2 test(ocr): restore public-boundary OCR coverage the Rust move cannot replace
The Python/Rust parity cases behind the ocr_backend fixture are back as they were on main:
the malformed-document matrix, Azure invalid options, native format for every provider and
the unknown Reducto model. They are the only check that the Python opt-out path and the
native path agree

test_native_failures_raise_the_public_exception_class drives every native failure kind
through litellm.ocr and litellm.aocr and pins the exception class callers catch. That class
is chosen in Python by route_host.map_failure, so no Rust test can cover it; bypassing the
mapping fails all 26 cases. The nested document edit and metadata failure tests run sync
again, since the sync path skips deployment hooks and dispatches success on the executor

legacy_callbacks.callbacks_needed now takes a Literal phase and ends its match with
assert_never, and setup imports from litellm.utils instead of mixing import styles
2026-09-17 21:36:48 -07:00

443 lines
16 KiB
Python

import asyncio
import copy
import queue
import threading
from typing import Final
import pytest
import litellm
from litellm.integrations.custom_logger import CustomLogger
from litellm.llms.base_llm.ocr.transformation import OCRResponse
from tests.test_litellm_rust.support.callback_recorder import RecordingLogger
from tests.test_litellm_rust.support.requests import (
OCR_DOCUMENT,
OCR_RESPONSE,
call_native_aocr,
call_native_ocr,
request_body,
request_headers,
)
from tests.test_litellm_rust.support.recording_server import RecordingServer, ResponseSpec
pytestmark = pytest.mark.requires_rust_extension
@pytest.fixture
def ocr_server(recording_server: RecordingServer) -> RecordingServer:
recording_server.default_response = ResponseSpec(body=OCR_RESPONSE)
return recording_server
def call_native_ocr_with_callbacks(server: RecordingServer, callbacks: list[CustomLogger], **kwargs: object):
return call_native_ocr(server, callbacks=callbacks, **kwargs)
async def call_native_aocr_with_callbacks(server: RecordingServer, callbacks: list[CustomLogger], **kwargs: object):
return await call_native_aocr(server, callbacks=callbacks, **kwargs)
def test_native_ocr_pre_call_callback_receives_transformed_provider_request(ocr_server: RecordingServer) -> None:
observations: Final = []
class Observe(CustomLogger):
def log_pre_api_call(self, model, messages, kwargs):
observations.append((model, copy.deepcopy(kwargs["additional_args"])))
call_native_ocr_with_callbacks(ocr_server, [Observe()], pages=[0])
assert len(observations) == 1
model, additional_args = observations[0]
assert model == "mistral-ocr-latest"
assert additional_args["api_base"] == f"{ocr_server.base_url}/v1/ocr"
assert additional_args["complete_input_dict"] == {
"model": "mistral-ocr-latest",
"document": OCR_DOCUMENT,
"pages": [0],
}
@pytest.mark.parametrize("raise_after_edit", [False, True], ids=["callback-returns", "callback-raises"])
def test_native_ocr_pre_call_body_edit_reaches_next_callback_and_provider(
ocr_server: RecordingServer, raise_after_edit: bool
) -> None:
observed: Final = []
class Edit(CustomLogger):
def log_pre_api_call(self, model, messages, kwargs):
request_body(kwargs)["include_image_base64"] = True
if raise_after_edit:
raise RuntimeError("pre-call callback failed")
class Observe(CustomLogger):
def log_pre_api_call(self, model, messages, kwargs):
observed.append(copy.deepcopy(request_body(kwargs)))
call_native_ocr_with_callbacks(ocr_server, [Edit(), Observe()], include_image_base64=False)
assert observed[0]["include_image_base64"] is True
assert ocr_server.requests[0].body["include_image_base64"] is True
def test_native_ocr_pre_call_header_edit_reaches_next_callback_and_provider(ocr_server: RecordingServer) -> None:
observed: Final = []
class Edit(CustomLogger):
def log_pre_api_call(self, model, messages, kwargs):
request_headers(kwargs)["x-audit-tag"] = "reviewed"
class Observe(CustomLogger):
def log_pre_api_call(self, model, messages, kwargs):
observed.append(dict(request_headers(kwargs)))
call_native_ocr_with_callbacks(ocr_server, [Edit(), Observe()])
assert observed[0]["x-audit-tag"] == "reviewed"
assert ocr_server.requests[0].headers["x-audit-tag"] == "reviewed"
@pytest.mark.asyncio
@pytest.mark.parametrize("asynchronous", [False, True], ids=["sync", "async"])
async def test_native_ocr_pre_call_nested_document_edit_updates_caller_callback_and_provider_references(
ocr_server: RecordingServer, asynchronous: bool
) -> None:
original: Final = dict(OCR_DOCUMENT)
replacement_url: Final = "data:application/pdf;base64,ZGVm"
retained: Final = []
aliases: Final = []
class Retain(CustomLogger):
def log_pre_api_call(self, model, messages, kwargs):
aliases.append(request_body(kwargs)["document"] is original)
retained.append(request_body(kwargs)["document"])
class Edit(CustomLogger):
def log_pre_api_call(self, model, messages, kwargs):
original["document_url"] = replacement_url
arguments: Final = {
"model": "mistral/mistral-ocr-latest",
"document": original,
"api_key": "test-key",
"api_base": ocr_server.base_url,
"callbacks": [Retain(), Edit()],
}
response: Final = (
await call_native_aocr(ocr_server, **arguments)
if asynchronous
else call_native_ocr(ocr_server, **arguments)
)
assert aliases == [True]
assert retained[0]["document_url"] == replacement_url
assert original["document_url"] == replacement_url
assert ocr_server.requests[0].body["document"]["document_url"] == replacement_url
assert response.pages[0].markdown == "native OCR response"
def test_native_ocr_pre_call_body_rebinding_is_visible_to_callbacks_but_not_provider(
ocr_server: RecordingServer,
) -> None:
observed: Final = []
class Rebind(CustomLogger):
def log_pre_api_call(self, model, messages, kwargs):
kwargs["additional_args"]["complete_input_dict"] = {"replacement": True}
class Observe(CustomLogger):
def log_pre_api_call(self, model, messages, kwargs):
observed.append(request_body(kwargs))
call_native_ocr_with_callbacks(ocr_server, [Rebind(), Observe()])
assert observed == [{"replacement": True}]
assert ocr_server.requests[0].body == {"model": "mistral-ocr-latest", "document": OCR_DOCUMENT}
def test_native_ocr_callback_retained_body_observes_later_callback_mutation(ocr_server: RecordingServer) -> None:
queued: Final = []
class QueuePayload(CustomLogger):
def log_pre_api_call(self, model, messages, kwargs):
queued.append(request_body(kwargs))
class Edit(CustomLogger):
def log_pre_api_call(self, model, messages, kwargs):
request_body(kwargs)["queued-edit"] = True
call_native_ocr_with_callbacks(ocr_server, [QueuePayload(), Edit()])
assert queued[0]["queued-edit"] is True
def test_native_ocr_success_callback_receives_state_added_by_pre_call_callback(ocr_server: RecordingServer) -> None:
token: Final = object()
terminal_tokens: queue.SimpleQueue[object] = queue.SimpleQueue()
finished: Final = threading.Event()
class Stash(CustomLogger):
def log_pre_api_call(self, model, messages, kwargs):
kwargs["test-token"] = token
def log_success_event(self, kwargs, response_obj, start_time, end_time):
terminal_tokens.put(kwargs["test-token"])
finished.set()
call_native_ocr_with_callbacks(ocr_server, [Stash()])
assert finished.wait(10)
assert terminal_tokens.get_nowait() is token
@pytest.mark.asyncio
async def test_native_aocr_success_callback_receives_call_id_metadata_and_response(
ocr_server: RecordingServer,
) -> None:
recorder: Final = RecordingLogger()
await call_native_aocr_with_callbacks(
ocr_server,
[recorder],
litellm_call_id="ocr-success",
metadata={"source": "callback-test"},
)
events: Final = await recorder.wait_for_async("async_log_success_event")
assert len(events) == 1
assert events[0].call_type == "aocr"
assert events[0].kwargs["litellm_call_id"] == "ocr-success"
assert events[0].kwargs["litellm_params"]["metadata"]["source"] == "callback-test"
assert events[0].response.pages[0].markdown == "native OCR response"
@pytest.mark.asyncio
async def test_native_aocr_failure_callbacks_receive_call_type_error_and_no_response(
ocr_server: RecordingServer,
) -> None:
ocr_server.enqueue(ResponseSpec(body={"message": "provider unavailable"}, status=500))
observations: Final = []
class Observe(CustomLogger):
def log_failure_event(self, kwargs, response_obj, start_time, end_time):
observations.append(("sync", kwargs["call_type"], kwargs["exception"], response_obj))
async def async_log_failure_event(self, kwargs, response_obj, start_time, end_time):
observations.append(("async", kwargs["call_type"], kwargs["exception"], response_obj))
with pytest.raises(litellm.InternalServerError):
await call_native_aocr_with_callbacks(ocr_server, [Observe()])
assert [observation[0] for observation in observations] == ["sync", "async"]
assert all(observation[1] == "aocr" for observation in observations)
assert all(isinstance(observation[2], litellm.InternalServerError) for observation in observations)
assert all(observation[3] is None for observation in observations)
@pytest.mark.asyncio
async def test_native_aocr_pre_call_callback_runs_on_caller_loop_and_thread(ocr_server: RecordingServer) -> None:
caller_loop: Final = asyncio.get_running_loop()
caller_thread: Final = threading.current_thread()
recorder: Final = RecordingLogger()
await call_native_aocr_with_callbacks(ocr_server, [recorder])
events: Final = await recorder.wait_for_async("log_pre_api_call")
assert len(events) == 1
assert events[0].loop is caller_loop
assert events[0].thread is caller_thread
@pytest.mark.asyncio
async def test_native_aocr_failure_callbacks_receive_state_added_by_pre_call_callback(
ocr_server: RecordingServer,
) -> None:
ocr_server.enqueue(ResponseSpec(body={"message": "provider unavailable"}, status=500))
token: Final = object()
observed: Final = []
class TrackInFlightRequest(CustomLogger):
def log_pre_api_call(self, model, messages, kwargs):
kwargs["request-token"] = token
def log_failure_event(self, kwargs, response_obj, start_time, end_time):
observed.append(("sync", kwargs["request-token"]))
async def async_log_failure_event(self, kwargs, response_obj, start_time, end_time):
observed.append(("async", kwargs["request-token"]))
with pytest.raises(litellm.InternalServerError):
await call_native_aocr_with_callbacks(ocr_server, [TrackInFlightRequest()])
assert [event for event, _ in observed] == ["sync", "async"]
assert all(observed_token is token for _, observed_token in observed)
def test_native_ocr_dispatches_each_callback_phase_once_when_logger_is_registered_multiple_times(
ocr_server: RecordingServer,
) -> None:
recorder: Final = RecordingLogger()
call_native_ocr_with_callbacks(
ocr_server,
[recorder, recorder],
success_callback=[recorder],
failure_callback=[recorder],
)
recorder.wait_for("log_success_event")
assert recorder.names.count("log_pre_api_call") == 1
assert recorder.names.count("logging_hook") == 1
assert recorder.names.count("log_success_event") == 1
assert "log_failure_event" not in recorder.names
@pytest.mark.asyncio
@pytest.mark.parametrize("asynchronous", [False, True], ids=["sync", "async"])
async def test_native_azure_ocr_resolves_token_before_pre_call_on_caller_context(
ocr_server: RecordingServer,
isolated_azure_auth: None,
asynchronous: bool,
) -> None:
from contextvars import ContextVar
context: Final = ContextVar("azure-token-context", default="missing")
context.set("caller")
caller_thread: Final = threading.current_thread()
caller_loop: Final = asyncio.get_running_loop()
observations: Final = []
class Provider:
def __call__(self) -> str:
assert context.get() == "caller"
assert threading.current_thread() is caller_thread
assert asyncio.get_running_loop() is caller_loop
observations.append("token")
return "caller-token"
class Edit(CustomLogger):
def log_pre_api_call(self, model, messages, kwargs):
assert request_headers(kwargs)["Authorization"] == "Bearer caller-token"
observations.append("pre_call")
request_headers(kwargs)["Authorization"] = "Bearer edited"
provider: Final = Provider()
arguments: Final = {
"model": "azure_ai/mistral-ocr-latest",
"api_key": None,
"azure_ad_token_provider": provider,
"callbacks": [Edit()],
}
response: Final = (
await call_native_aocr(ocr_server, **arguments) if asynchronous else call_native_ocr(ocr_server, **arguments)
)
assert response.pages[0].markdown == "native OCR response"
assert observations == ["token", "pre_call"]
assert ocr_server.requests[0].headers["authorization"] == "Bearer edited"
@pytest.mark.asyncio
@pytest.mark.parametrize("asynchronous", [False, True], ids=["sync", "async"])
async def test_native_azure_ocr_token_provider_can_make_nested_native_ocr_call(
ocr_server: RecordingServer,
isolated_azure_auth: None,
asynchronous: bool,
) -> None:
ocr_server.expected_requests = 2
calls: Final = []
def provider() -> str:
calls.append("token")
nested: Final = call_native_ocr(ocr_server)
assert nested.pages[0].markdown == "native OCR response"
return "outer-token"
arguments: Final = {
"model": "azure_ai/mistral-ocr-latest",
"api_key": None,
"azure_ad_token_provider": provider,
}
response: Final = (
await call_native_aocr(ocr_server, **arguments) if asynchronous else call_native_ocr(ocr_server, **arguments)
)
assert response.pages[0].markdown == "native OCR response"
assert calls == ["token"]
assert [request.headers["authorization"] for request in ocr_server.requests] == [
"Bearer test-key",
"Bearer outer-token",
]
@pytest.mark.asyncio
async def test_concurrent_native_azure_ocr_calls_isolate_token_results_and_error(
ocr_server: RecordingServer,
isolated_azure_auth: None,
) -> None:
ocr_server.expected_requests = 2
async def request(token: str, fail: bool) -> object:
def provider() -> str:
if fail:
raise ValueError(token)
return token
return await call_native_aocr(
ocr_server,
model="azure_ai/mistral-ocr-latest",
api_key=None,
azure_ad_token_provider=provider,
)
responses: Final = await asyncio.gather(
request("first", False),
request("failed", True),
request("second", False),
return_exceptions=True,
)
assert isinstance(responses[0], OCRResponse)
assert isinstance(responses[1], litellm.APIConnectionError)
assert "Failed to get Azure AD token: failed" in str(responses[1])
assert isinstance(responses[2], OCRResponse)
assert sorted(request.headers["authorization"] for request in ocr_server.requests) == [
"Bearer first",
"Bearer second",
]
@pytest.mark.asyncio
async def test_native_azure_ocr_releases_token_provider_after_cancellation(
ocr_server: RecordingServer,
isolated_azure_auth: None,
) -> None:
import gc
import weakref
from tests.test_litellm_rust.support.callback_recorder import drain_logging
class Provider:
def __call__(self) -> str:
return "caller-token"
async def invoke() -> weakref.ReferenceType[Provider]:
provider: Final = Provider()
reference: Final = weakref.ref(provider)
ocr_server.enqueue(ResponseSpec(body=OCR_RESPONSE, delay=0.1))
task: Final = asyncio.create_task(
call_native_aocr(
ocr_server,
model="azure_ai/mistral-ocr-latest",
api_key=None,
azure_ad_token_provider=provider,
)
)
await ocr_server.wait_for_requests(1)
assert reference() is provider
task.cancel()
with pytest.raises(asyncio.CancelledError):
await task
return reference
reference: Final = await invoke()
await drain_logging()
await asyncio.sleep(0)
gc.collect()
assert reference() is None