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rose-ash/lib/dream/tests/cors.sx
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dream: CORS middleware + preflight handling + 12 tests
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-07 15:04:43 +00:00

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;; lib/dream/tests/cors.sx — CORS decoration + preflight.
(define dream-co-pass 0)
(define dream-co-fail 0)
(define dream-co-fails (list))
(define
dream-co-test
(fn
(name actual expected)
(if
(= actual expected)
(set! dream-co-pass (+ dream-co-pass 1))
(begin
(set! dream-co-fail (+ dream-co-fail 1))
(append! dream-co-fails {:name name :actual actual :expected expected})))))
(define dream-co-h (fn (req) (dream-text "payload")))
(define dream-co-app (dream-cors dream-co-h))
;; ── decoration of normal responses ─────────────────────────────────
(define dream-co-get (dream-co-app (dream-request "GET" "/" {} "")))
(dream-co-test
"allow-origin star"
(dream-resp-header dream-co-get "access-control-allow-origin")
"*")
(dream-co-test "body preserved" (dream-resp-body dream-co-get) "payload")
(dream-co-test "status preserved" (dream-status dream-co-get) 200)
(dream-co-test
"no credentials by default"
(dream-resp-header dream-co-get "access-control-allow-credentials")
nil)
;; ── preflight OPTIONS ──────────────────────────────────────────────
(define
dream-co-pre
(dream-co-app (dream-request "OPTIONS" "/" {} "")))
(dream-co-test "preflight 204" (dream-status dream-co-pre) 204)
(dream-co-test
"preflight origin"
(dream-resp-header dream-co-pre "access-control-allow-origin")
"*")
(dream-co-test
"preflight methods"
(contains?
(dream-resp-header dream-co-pre "access-control-allow-methods")
"POST")
true)
(dream-co-test
"preflight headers"
(dream-resp-header dream-co-pre "access-control-allow-headers")
"Content-Type")
(dream-co-test
"preflight max-age"
(dream-resp-header dream-co-pre "access-control-max-age")
"86400")
;; ── custom origin ──────────────────────────────────────────────────
(define
dream-co-custom
((dream-cors-origin "https://app.example.com") dream-co-h))
(dream-co-test
"custom origin"
(dream-resp-header
(dream-co-custom (dream-request "GET" "/" {} ""))
"access-control-allow-origin")
"https://app.example.com")
;; ── credentials enabled ────────────────────────────────────────────
(define
dream-co-cred
((dream-cors-with (assoc dream-cors-defaults :credentials true))
dream-co-h))
(dream-co-test
"credentials header"
(dream-resp-header
(dream-co-cred (dream-request "GET" "/" {} ""))
"access-control-allow-credentials")
"true")
;; ── composes around a router ───────────────────────────────────────
(define
dream-co-router
(dream-cors
(dream-router (list (dream-get "/api" (fn (req) (dream-json "{}")))))))
(dream-co-test
"router cors origin"
(dream-resp-header
(dream-co-router (dream-request "GET" "/api" {} ""))
"access-control-allow-origin")
"*")
(define dream-co-tests-run! (fn () {:total (+ dream-co-pass dream-co-fail) :passed dream-co-pass :failed dream-co-fail :fails dream-co-fails}))