litellm/tests/unit/AGENTS.md
Mateo Wang 08f04fbc97
test(interactions): read the spec from a vendored snapshot and canary the live one daily (#48002)
* test(interactions): assert the live status enum is parsable instead of pinning it

* test(interactions): read the spec from a vendored snapshot and canary the live one daily

* test(interactions): run the canary on PRs touching its inputs, file an issue on a red run, pin the regenerate command

* test(interactions): take the live spec URL as a pytest option, assert its source, split the canary's tracking-issue job

* test(interactions): file the canary issue whenever its compliance step did not pass, match the issue title exactly, cover UrlContextResult
2026-10-23 17:20:40 +00:00

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# tests/unit
In-process. No network or subprocess. `interactions/test_openapi_compliance.py` reads the spec snapshot beside it,
and only the `interactions-spec-canary` workflow passes `--interactions-spec-url` (registered in
`interactions/conftest.py`, so name that file or directory on the command line) with `ai.google.dev` allowed, to run
the same tests against Google's live spec
Unit tests must not depend on the current time or execution speed. Use fixed timestamps for fixtures
and controlled clocks for time-dependent behavior. Incidental clock reads inside production code are allowed
## What good looks like
```python
def test_send_result_same_version_is_identity_passthrough():
rpc = _rpc(V03_MESSAGE)
out = normalize_jsonrpc_response(rpc, "0.3", method="message/send")
assert out is rpc
```
`is`, because `==` passes on a copy. Many inputs: parametrize
(`test_an_incomplete_reservation_accrues_nothing`, fifteen cases, fifteen results)
No doubles on our own code
```python
with patch.object(streamer, "_group_by_date") as mock_group, patch.object(streamer, "_send_daily_batch") as mock_send:
mock_group.return_value = {"2025-01-19": pl.DataFrame({"test": ["data1"]}), "2025-01-20": pl.DataFrame({"test": ["data2"]})}
streamer.send_batched(pl.DataFrame({"test": ["data"]}), "replace_hourly")
assert mock_send.call_count == 2
```
Green if `send_batched` drops every row. pydantic doubles in 12 of 203 files, fastapi 11 of 594.
`tests/test_litellm` 59 percent. Exception: the count is the behaviour
(`test_dual_cache_async_batch_get_cache_coalesces_concurrent_redis_reads`, fifty readers, `call_count == 1`)
## Where it goes
`tests/unit/<path>` mirrors `litellm/<path>`, so a changed file selects its tests by path, not a mapping
file. New unit tests go here
## Writing it so a human can read it
A class only when tests share an arrange