testkit/

Package bench is the funcd benchmark & sustainability harness (ADR-0040): it embeds the platform, drives the public data plane, and samples process memory to answer whether the platform is sustainable on the target box (RAM-bound, scale-to-zero).

Package freeport gives a test a free loopback TCP port that no :0 bind is ever given, for a test that frees a port and binds it again (#758): another test process's :0 bind can take an ephemeral port in between.

Package langmod locates the language repos funcd pins as Go modules (ADR-0141): a pinned module's root, for the committed example builds, and the embedded Node and Python shims written to a temp dir, for the tests that exec them.

Package loadgen is a small, stdlib-only client-side HTTP load generator (ADR-0053).

Package realshim brings the real Node shim up under a function.Reconciler for the node-gated tests (ADR-0030 node lane).

Package sendbuf fixes the kernel send buffer of a test server's connections.

Package stallregistry serves an OCI registry that accepts every request and stops answering it (#697).

Package wsupstream is the one WebSocket test upstream (ADR-0181): an httptest server over x/net/websocket that records each request's ContentLength and serves the query parameter mode.