Testing

Days uses a mix of unit tests and integration tests under tests/.

Run tests

Recommended:

cargo test --features test -- --show-output

If you have cargo-nextest installed:

cargo nextest run --all-features --no-capture

Feature-gated test suites

Many tests use #![cfg(feature = "test")] to enable additional invariants and helpers (for example, verifying that local time tracking matches the simulation engine clock).

Some tests also require protocol features:

• PFC tests: --features test,l2_pfc
• DCQCN tests: --features test,dcqcn

Test fixtures

Integration tests may have adjacent TOML fixtures (for example tests/build_graph.rs + tests/build_graph.toml). Configuration examples for manual runs live under configs/.