0.9.13.40: RUN-PROGRAM tweak

[sbcl.git] / tests / run-program.impure.lisp

diff --git a/tests/run-program.impure.lisp b/tests/run-program.impure.lisp
index b30ade5..609976a 100644 (file)
--- a/tests/run-program.impure.lisp
+++ b/tests/run-program.impure.lisp
@@ -13,11 +13,11 @@
 
 (cl:in-package :cl-user)
 
-;; Actually there's no real side-effect here. The impurity we're
-;; avoiding is the sigchld handler that RUN-PROGRAM sets up, which
-;; interfers with the manual unix process control done by the test
-;; framework (sometimes the handler will manage to WAIT3 a process
-;; before run-tests WAITPIDs it).
+;; Actually there's no real side-effect here. (But see below.) The
+;; impurity we're avoiding is the sigchld handler that RUN-PROGRAM
+;; sets up, which interfers with the manual unix process control done
+;; by the test framework (sometimes the handler will manage to WAIT3 a
+;; process before run-tests WAITPIDs it).
 
 (let* ((process (sb-ext:run-program "/bin/cat" '() :wait nil
                                     :output :stream :input :stream))
@@ -29,3 +29,71 @@
              (force-output out)
              (assert (= (read-byte in) i)))
     (process-close process)))
+
+;;; Test driving an external program (ed) through pipes wrapped in
+;;; composite streams.
+
+(require :sb-posix)
+
+(defvar *tmpfile* "run-program-ed-test.tmp")
+
+(with-open-file (f *tmpfile*
+                   :direction :output
+                   :if-exists :supersede)
+  (write-line "bar" f))
+
+(defun make-pipe ()
+  (multiple-value-bind (in out) (sb-posix:pipe)
+    (let ((input (sb-sys:make-fd-stream in 
+                                        :input t 
+                                        :external-format :ascii
+                                        :buffering :none :name "in"))
+          (output (sb-sys:make-fd-stream out 
+                                         :output t 
+                                         :external-format :ascii
+                                         :buffering :none :name "out")))
+      (make-two-way-stream input output))))
+
+(defvar *in-pipe* (make-pipe))
+(defvar *in* (make-synonym-stream '*in-pipe*))
+(defvar *out-pipe* (make-pipe))
+(defvar *out* (make-synonym-stream '*out-pipe*))
+
+(defvar *ed* 
+  (run-program "/bin/ed" (list *tmpfile*) :input *in* :output *out* :wait nil))
+
+(defun real-input (stream)
+  (two-way-stream-input-stream (symbol-value (synonym-stream-symbol stream))))
+
+(defun magic-read-line (stream)
+  ;; KLUDGE 1: The otherwise out :buffering :none is worth nothing,
+  (let ((input (real-input stream)))
+    (with-output-to-string (s)
+      ;; KLUDGE 2: Something funny going on with buffering, as plain
+      ;; READ-CHAR will hang here waiting for the newline, also
+      ;; -NO-HANG will return too early without the sleep.
+      ;;
+      ;; Shoot me now. --NS 2006-06-09
+      (loop for c = (progn (sleep 0.2) (read-char-no-hang input))
+         while (and c (not (eq #\newline c)))
+         do (write-char c s)))))
+
+(defun assert-ed (command response)
+  (when command
+    (write-line command *in*)
+    (force-output *in*))
+  (let ((got (magic-read-line *out*)))
+    (unless (equal response got)
+      (error "wanted ~S from ed, got ~S" response got)))
+  *ed*)
+
+(assert-ed nil "4")
+(assert-ed ".s/bar/baz/g" "")
+(assert-ed "w" "4")
+(assert-ed "q" "")
+(process-wait *ed*)
+
+(with-open-file (f *tmpfile*)
+  (assert (equal "baz" (read-line f))))
+
+;(delete-file *tmp*)