From fe933833504c90eb40b0d2c71847675b31c142b4 Mon Sep 17 00:00:00 2001
From: Ludovic Courtès <ludo@gnu.org>
Date: Wed, 23 Nov 2016 13:56:42 +0100
Subject: marionette: Add 'marionette-screen-text' using OCR.

* gnu/build/marionette.scm (marionette-screen-text): New procedure.
* gnu/tests/base.scm (run-basic-test)["screen text"]: New test.
---
 gnu/tests/base.scm | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'gnu/tests/base.scm')

diff --git a/gnu/tests/base.scm b/gnu/tests/base.scm
index 9a265309c0..3be1c55b41 100644
--- a/gnu/tests/base.scm
+++ b/gnu/tests/base.scm
@@ -31,6 +31,8 @@
   #:use-module (gnu services mcron)
   #:use-module (gnu services shepherd)
   #:use-module (gnu services networking)
+  #:use-module (gnu packages imagemagick)
+  #:use-module (gnu packages ocr)
   #:use-module (guix gexp)
   #:use-module (guix store)
   #:use-module (guix monads)
@@ -241,6 +243,20 @@ info --version")
                                   marionette)
               (file-exists? "tty1.ppm")))
 
+          (test-assert "screen text"
+            (let ((text (marionette-screen-text marionette
+                                                #:ocrad
+                                                #$(file-append ocrad
+                                                               "/bin/ocrad"))))
+              ;; Check whether the welcome message and shell prompt are
+              ;; displayed.  Note: OCR confuses "y" and "V" for instance, so
+              ;; we cannot reliably match the whole text.
+              (and (string-contains text "This is the GNU")
+                   (string-contains text
+                                    (string-append
+                                     "root@"
+                                     #$(operating-system-host-name os))))))
+
           (test-end)
           (exit (= (test-runner-fail-count (test-runner-current)) 0)))))
 
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