litellm/litellm-rust/crates/cache-memory/tests/contract.rs
devin-ai-integration[bot] 4677f1028e
refactor(rust): align the cache crates with Python and wire every native backend (#42530)
* refactor(rust): align the cache crates with Python and activate every backend

The cache port had drifted: lifecycle and Redis-only operations sat on
`BaseCache`, counters were pinned to `f64`, each semantic backend defined its
own embedder and prompt handling, and only the in-memory backend could be
selected natively.

- Split `disconnect` and `test_connection` out of `BaseCache` into optional
  capabilities, implemented only where the Python class defines them, and give
  every Redis-only operation its own capability trait.
- Decouple counters from the stored value type, so one backend can serve both
  responses and counters as Python's `RedisCache` does.
- Share one `Embedder` and prompt contract in `litellm_cache::semantic`, and
  make the Redis and Valkey semantic backends generic over their codec.
- Port the Python operations that were missing: `async_refresh_ttl`,
  `async_rpush_and_trim`, `async_set_cache_pipeline_with_ttls`, the DualCache
  pipeline, sadd, bulk delete and TTL reads, and the semantic-similarity
  write-back.
- Take the HTTP client from the host pool in the GCS, S3 and Azure backends.
- Activate all nine backends through the Rust catalog, whose rules all stay
  `PYTHON_ONLY`, and route the `Cache` facade's storage calls to the native
  runtime when one is selected.
- Give every crate the same layout, move all tests to `tests/` on rstest, and
  add the shared `litellm-cache-testing` contract suite.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* fix: freeze native cache request kwargs and batch entries for type discipline

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* fix: declare semantic lookup methods in the native stub

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* refactor(rust): align the cache crates with Python and activate every backend

The cache port had drifted: lifecycle and Redis-only operations sat on
`BaseCache`, counters were pinned to `f64`, each semantic backend defined its
own embedder and prompt handling, and only the in-memory backend could be
selected natively.

- Split `disconnect` and `test_connection` out of `BaseCache` into optional
  capabilities, implemented only where the Python class defines them, and give
  every Redis-only operation its own capability trait.
- Decouple counters from the stored value type, so one backend can serve both
  responses and counters as Python's `RedisCache` does.
- Share one `Embedder` and prompt contract in `litellm_cache::semantic`, and
  make the Redis and Valkey semantic backends generic over their codec.
- Port the Python operations that were missing: `async_refresh_ttl`,
  `async_rpush_and_trim`, `async_set_cache_pipeline_with_ttls`, the DualCache
  pipeline, sadd, bulk delete and TTL reads, and the semantic-similarity
  write-back.
- Take the HTTP client from the host pool in the GCS, S3 and Azure backends.
- Activate all nine backends through the Rust catalog, whose rules all stay
  `PYTHON_ONLY`, and route the `Cache` facade's storage calls to the native
  runtime when one is selected.
- Give every crate the same layout, move all tests to `tests/` on rstest, and
  add the shared `litellm-cache-testing` contract suite.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* fix: freeze native cache request kwargs and batch entries for type discipline

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* fix: declare semantic lookup methods in the native stub

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* test(rust): opt the native Messages and tokenizer suites into Rust explicitly

#42517 made the Messages, token counter and tokenizer routes Python-only, so
tests/test_litellm_rust silently exercised the Python path or failed outright.
Each suite now prepends a RUST_OPT_IN rule for its route, keeping native
coverage without changing the shipped default.

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

* fix(rust): pop one at a time in the Redis 6 lpop pipeline and drop explanatory comments

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

---------

Co-authored-by: Yujong Lee <yujong@berri.ai>
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
2026-09-22 13:13:02 -07:00

98 lines
2.3 KiB
Rust

use std::time::Duration;
use litellm_cache::ExactCacheContext;
use litellm_cache_memory::InMemoryCache;
use litellm_cache_testing as contract;
use rstest::{fixture, rstest};
#[fixture]
fn strings() -> InMemoryCache<String> {
InMemoryCache::new(Some(16), None)
}
#[fixture]
fn counters() -> InMemoryCache<f64> {
InMemoryCache::new(Some(16), None)
}
#[fixture]
fn context() -> ExactCacheContext {
ExactCacheContext {
ttl: Some(Duration::from_secs(60)),
}
}
#[rstest]
#[tokio::test]
async fn hit_and_miss(strings: InMemoryCache<String>, context: ExactCacheContext) {
contract::hit_and_miss(&strings, context, "memory:", "value".into()).await;
}
#[rstest]
#[tokio::test]
async fn sync_async_equivalence(strings: InMemoryCache<String>, context: ExactCacheContext) {
contract::sync_async_equivalence(
&strings,
context,
"memory:",
"first".into(),
"second".into(),
)
.await;
}
#[rstest]
#[tokio::test]
async fn overwrite_replaces(strings: InMemoryCache<String>, context: ExactCacheContext) {
contract::overwrite_replaces(
&strings,
context,
"memory:",
"first".into(),
"second".into(),
)
.await;
}
#[rstest]
#[tokio::test]
async fn pipeline_writes_every_entry(strings: InMemoryCache<String>, context: ExactCacheContext) {
contract::pipeline_writes_every_entry(
&strings,
context,
"memory:",
vec!["a".into(), "b".into(), "c".into()],
)
.await;
}
#[rstest]
#[tokio::test]
async fn batch_preserves_order(strings: InMemoryCache<String>, context: ExactCacheContext) {
contract::batch_preserves_order(
&strings,
context,
"memory:",
"first".into(),
"second".into(),
)
.await;
}
#[rstest]
#[tokio::test]
async fn delete_removes_key(strings: InMemoryCache<String>, context: ExactCacheContext) {
contract::delete_removes_key(&strings, context, "memory:", "value".into()).await;
}
#[rstest]
#[tokio::test]
async fn flush_clears(strings: InMemoryCache<String>, context: ExactCacheContext) {
contract::flush_clears(&strings, context, "memory:", "value".into()).await;
}
#[rstest]
#[tokio::test]
async fn counter_accumulates(counters: InMemoryCache<f64>, context: ExactCacheContext) {
contract::counter_accumulates(&counters, context, "memory:").await;
}