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diff --git a/tests/guix-web/render.scm b/tests/guix-web/render.scm
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+;;; guix-web - Web interface for GNU Guix
+;;; Copyright © 2014  David Thompson <davet@gnu.org>
+;;;
+;;; This program is free software: you can redistribute it and/or
+;;; modify it under the terms of the GNU Affero General Public License
+;;; as published by the Free Software Foundation, either version 3 of
+;;; the License, or (at your option) any later version.
+;;;
+;;; This program is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; Affero General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Affero General Public
+;;; License along with this program.  If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+(define-module (tests guix-web render)
+  #:use-module (ice-9 match)
+  #:use-module (srfi srfi-64)
+  #:use-module (web response)
+  #:use-module (web uri)
+  #:use-module (json)
+  #:use-module (guix-web render))
+
+(define render-to-string
+  (match-lambda
+   ((headers render-proc)
+    (list headers (call-with-output-string render-proc)))))
+
+(test-begin "render")
+
+(test-equal "render-html"
+  '(((content-type . (text/html)))
+    "<!DOCTYPE html><html><head><title>guix-web</title></head></html>")
+  (render-to-string
+   (render-html '(html (head (title "guix-web"))))))
+
+(test-equal "render-json"
+  '(((content-type . (application/json)))
+    "{\"foo\" : [1, 2, 3]}")
+  (render-to-string
+   (render-json (json (object ("foo" (1 2 3)))))))
+
+(test-equal "not-found"
+  (list (build-response #:code 404)
+        "Resource not found: http://localhost/foo")
+  (not-found (string->uri "http://localhost/foo")))
+
+(test-equal "unprocessable-entity"
+  (list (build-response #:code 422) "")
+  (unprocessable-entity))
+
+(test-equal "created"
+  (list (build-response #:code 201) "")
+  (created))
+
+(test-equal "redirect"
+  (list (build-response
+         #:code 301
+         #:headers `((content-type . (text/html))
+                     (location . ,(string->uri "http://localhost/foo/bar"))))
+        "Redirect to http://localhost/foo/bar")
+  (redirect '("foo" "bar")))
+
+(test-end)
+
+(exit (= (test-runner-fail-count (test-runner-current)) 0))