From 6cb4e437680c8095d4de922e77fdc32b09ccd08d Mon Sep 17 00:00:00 2001
From: Peter Bex <peter@more-magic.net>
Date: Sun, 29 Jul 2018 17:41:25 +0200
Subject: Port http-client to CHICKEN 5

---
 tests/testlib.scm | 87 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 tests/testlib.scm

(limited to 'tests/testlib.scm')

diff --git a/tests/testlib.scm b/tests/testlib.scm
new file mode 100644
index 0000000..33ac2e2
--- /dev/null
+++ b/tests/testlib.scm
@@ -0,0 +1,87 @@
+;; http-client test library.  This adds some helpers for setting up
+;; fake connections and logging the requests and responses.
+
+;; TODO: Test HTTPS somehow?
+
+(import test uri-common intarweb srfi-1 srfi-18 (chicken tcp)
+        (chicken string) (chicken io) (chicken file) (chicken format))
+
+;; From intarweb
+(define-syntax test-error*
+  (syntax-rules ()
+    ((_ ?msg (?error-type ...) ?expr)
+     (let-syntax ((expression:
+                   (syntax-rules ()
+                     ((_ ?expr)
+                      (condition-case (begin ?expr "<no error thrown>")
+                                      ((?error-type ...) '(?error-type ...))
+                                      (exn () (##sys#slot exn 1)))))))
+       (test ?msg '(?error-type ...) (expression: ?expr))))
+    ((_ ?msg ?error-type ?expr)
+     (test-error* ?msg (?error-type) ?expr))
+    ((_ ?error-type ?expr)
+     (test-error* (sprintf "~S" '?expr) ?error-type ?expr))))
+
+(define-record log request body)
+
+(define server-port #f)
+
+(server-connector (lambda (uri proxy)
+                    (tcp-connect "localhost" server-port)) )
+
+;; These need to be reasonably high to avoid lots of errors on slow
+;; VMs and some OSes (FreeBSD in particular?), see also Salmonella.
+;; At least 100 seems to be too low, so we aim high and set it to 500.
+(tcp-read-timeout 500)
+(tcp-write-timeout 500)
+
+;; Set up a number of fake connections to a "server", with predefined
+;; responses for each (expected) request.
+(define (with-server-responses thunk . responses)
+  (let* ((response-count (length responses))
+         (logs '())
+         (listener (tcp-listen 0 0 "localhost"))
+         (server-thread
+          (thread-start!
+           (make-thread
+            (lambda ()
+              (let lp ()
+                (if (null? responses)
+                    (tcp-close listener)
+                    (receive (in out) (tcp-accept listener)
+                      (let* ((req (read-request in))
+                             (h (request-headers req))
+                             (log (make-log req #f))
+                             (response (car responses)))
+
+                        (when ((request-has-message-body?) req)
+                          (let* ((len (header-value 'content-length h))
+                                 (body (read-string len (request-port req))))
+                            (log-body-set! log body)))
+                        (set! logs (cons log logs))
+                        (set! responses (cdr responses))
+                        (display response out)
+                        (close-output-port out)
+                        (lp))))))
+            'server-thread))))
+
+    (set! server-port (tcp-listener-port listener))
+
+    ;; TODO: Figure out how to ensure connections get closed correctly
+    (dynamic-wind
+        void
+        thunk
+        (lambda ()
+          (handle-exceptions exn (thread-terminate! server-thread)
+            ;; To close idle connections here to catch a regression
+            ;; where we would loop endlessly...
+            (close-idle-connections!)
+            (thread-join! server-thread 0)) ))
+    
+    ;; Return the accumulated logs if all went well
+    (if (not (= (length logs) response-count))
+        (error (sprintf "Not enough requests.  Expected ~A responses, but logged ~A requests!" response-count (length logs)))
+        (reverse logs)) ))
+
+(define (with-server-response thunk response)
+  (car (with-server-responses thunk response)))
-- 
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