test(nexum-engine): supervisor integration tests for 5 production modules (COW-1068)#30
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…ules (COW-1068)
Closes the M3 gap surfaced by the COW-1063 QA pass: every production
module had strong MockHost coverage on its strategy logic, but none
exercised the real wit-bindgen + WitBindgenHost adapter + supervisor
dispatch path. Wit-bindgen / wasmtime / linker regressions could
ship without any test catching them.
Adds 5 integration tests in `crates/nexum-engine/src/supervisor/
tests.rs`, one per production module, modelled on the existing
`e2e_supervisor_boots_example_module` shape:
e2e_twap_monitor_block_dispatch
e2e_ethflow_watcher_log_dispatch
e2e_price_alert_block_dispatch
e2e_balance_tracker_block_dispatch
e2e_stop_loss_block_dispatch
Each test:
* Uses `module_wasm_or_skip(name)` so local runs without a fresh
`cargo build --target wasm32-wasip2 --release -p <module>` are
skipped rather than failing.
* Boots the supervisor with the module's real `module.toml` (not
a synthesised manifest), so capability declarations + subscription
shapes are honest.
* Dispatches a synthetic Block (block-subscribed modules) or Log
(ethflow-watcher) on Sepolia chain id 11155111.
* Asserts the supervisor delivered the event and the module stayed
alive.
Three shared helpers added next to the existing `example_wasm()`
ones:
module_wasm(name) / module_wasm_or_skip(name)
production_module_toml(rel_path)
boot_production_module(...)
synthetic_sepolia_block()
Asserts are intentionally minimal at this layer (dispatched ==
1 / alive_count == 1). Stronger module-specific assertions
(local-store keys for `submitted:{uid}`, etc.) require either
hand-crafted ABI payloads or a real chain/orderbook stub - that
work lives in COW-1064 (testnet integration). The MockHost
coverage already exercises those state transitions per BLEU-851
/ -852 / -854 / -855.
Verified locally:
cargo test -p nexum-engine -> 46 passed (was 41)
cargo test --workspace -> 149 host tests +
6 doctests passing
cargo clippy --all-targets --workspace -> clean
cargo fmt --all --check -> clean
grep -rn '—' crates/nexum-engine/src/supervisor/tests.rs -> 0
Linear: COW-1068. Stacks on COW-1066 + COW-1069 + COW-1067.
5 tasks
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What does this PR do?
Adds 5 supervisor-level integration tests in `crates/nexum-engine/src/supervisor/tests.rs`, one per production module, so the real wit-bindgen + WitBindgenHost adapter + supervisor dispatch path is exercised - not just the MockHost strategy coverage.
Why
Surfaced by the COW-1063 QA pass. Today the 5 production modules have strong unit-test coverage via `&impl Host` + MockHost (145 tests), but they never go through the real supervisor in any test. A regression in the wit-bindgen adapter, the SDK <-> wit `HostError` conversion, or the `Guest::on_event` destructuring would only surface in testnet (COW-1064) or production.
Changes
5 new `tokio::test` cases mirroring the existing `e2e_supervisor_boots_example_module` shape:
Each test:
Shared helpers added next to existing `example_wasm()` ones: `module_wasm()`, `production_module_toml()`, `boot_production_module()`, `synthetic_sepolia_block()`.
Asserts intentionally minimal
Stronger module-specific assertions (local-store `submitted:{uid}` markers, etc.) need either hand-crafted ABI payloads or real chain / orderbook stubs - that work lives in COW-1064 (testnet integration). The MockHost coverage already exercises those state transitions per BLEU-851 / -852 / -854 / -855.
Breaking changes
None.
Testing
AI assistance disclosure
AI Assistance: this change + description was produced by a Claude Code agent (Claude Opus 4.7 1M context). A human (Bruno) reviewed and is accountable for the result.
Linear: COW-1068. Stacks on #29 (COW-1067 SDK doctests) -> #28 (COW-1069 rustdoc gate) -> #27 (COW-1066 CI matrix) -> #26 (COW-1063 QA cleanup).