Add hammer selftest smoke-test subcommand#11
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A new `selftest` subcommand exercises the real load engine against an in-process HTTP server — no network and no external target required. It asserts the things an agent depends on actually work in this binary: - 200 OK request accounting (sent/received/errors/error_rate/latency samples) - 5xx responses classified as errors - the `-ok` override turning a 4xx into a success - SLO threshold evaluation firing both pass and fail on one run - per-call headers and the inferred Content-Type reaching the server - JSON-array and object-stream profile forms parsing to the same calls Exits 0 when every check passes, 1 otherwise; `-json` emits machine-readable results. Wired into the subcommand dispatch alongside `update`, documented in the usage banner and README, and covered by tests (all-pass, JSON shape, help, bad flag, failing-report exit code, server capture). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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What
Adds a
hammer selftestsubcommand: a dependency-free smoke test that drivesthe real load engine against an in-process HTTP server and verifies the
behaviors an agent relies on.
Exits
0when all checks pass,1otherwise.-jsonemits machine-readableresults so CI/agents can assert on the binary's health before relying on it.
Why
hammeris meant to be driven by agents.selftestlets an agent confirm afreshly installed/updated binary actually works (request path, accounting,
status classification,
-ok, SLO checks, header propagation, both profileformats) without needing an external target or network — complementing the
updateself-management command.Tests
New
selftest_test.go: all-pass run + exit code, JSON shape,-h, bad flag,the failing-report exit/detail path,
statusCount, and the in-process servercapture.
go test -race ./...,go vet,gofmtall clean; package coverage84.8%.
🤖 Generated with Claude Code