Files
rose-ash/lib/host/tests/router.sx
giles d5a1c8370c host: Phase 1 — router + handler + GET /feed endpoint on Dream, 28/28
First migrated endpoint onto the SX host. lib/host is a thin wiring layer:
a host handler is a Dream handler (request->response) that calls a subsystem
public API and serialises via a shared JSON envelope.

- handler.sx: host/ok, host/ok-status, host/error, host/json-status (Dream's
  dream-json is 200-only), host/query-int
- router.sx: host/make-app assembles per-domain route groups + /health probe
  into one dream-router (reuses dr/flatten-routes)
- feed.sx: GET /feed reads feed/all + stream combinators, recent-first, with
  ?actor= filter and ?limit= cap
- 3 test suites incl. a golden test (body == subsystem recent stream + envelope)
- conformance.sh mirrors lib/dream's runner

Builds on dream-on-sx (merged, gate green 480/480) rather than a throwaway
native request model; collapses most of plan Phase 4 into Phase 1.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-07 19:36:55 +00:00

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;; lib/host/tests/router.sx — host app assembly: health endpoint, group mounting,
;; 404 fallback.
(define host-rt-pass 0)
(define host-rt-fail 0)
(define host-rt-fails (list))
(define
host-rt-test
(fn
(name actual expected)
(if
(= actual expected)
(set! host-rt-pass (+ host-rt-pass 1))
(begin
(set! host-rt-fail (+ host-rt-fail 1))
(append! host-rt-fails {:name name :actual actual :expected expected})))))
(define
host-rt-req
(fn (method target) (dream-request method target {} "")))
;; An app built from one domain group of two routes.
(define
host-rt-app
(host/make-app
(list
(list
(dream-get "/ping" (fn (req) (host/ok "pong")))
(dream-get "/widgets/:id" (fn (req) (host/ok (dream-param req "id"))))))))
;; ── health ─────────────────────────────────────────────────────────
(host-rt-test
"health status 200"
(dream-status (host-rt-app (host-rt-req "GET" "/health")))
200)
(host-rt-test
"health body healthy"
(contains?
(dream-resp-body (host-rt-app (host-rt-req "GET" "/health")))
"healthy")
true)
;; ── group routes mounted ───────────────────────────────────────────
(host-rt-test
"group route ping"
(contains?
(dream-resp-body (host-rt-app (host-rt-req "GET" "/ping")))
"pong")
true)
(host-rt-test
"group path param"
(contains?
(dream-resp-body (host-rt-app (host-rt-req "GET" "/widgets/42")))
"\"data\":\"42\"")
true)
;; ── fallback ───────────────────────────────────────────────────────
(host-rt-test
"unknown path 404"
(dream-status (host-rt-app (host-rt-req "GET" "/nope")))
404)
(host-rt-test
"wrong method 405"
(dream-status (host-rt-app (host-rt-req "POST" "/ping")))
405)
(define
host-rt-tests-run!
(fn
()
{:total (+ host-rt-pass host-rt-fail)
:passed host-rt-pass
:failed host-rt-fail
:fails host-rt-fails}))