The patch adds test-lib.el file for Emacs tests auxiliary stuff.
Currently, it implements two functions: `visible-buffer-string'
and `visible-buffer-substring'.  These are similar to standard
counterparts without "visible-" prefix but exclude invisible
text.  The functions are not used anywhere at the moment but
should be useful for testing hiding/showing in the Emacs
interface.
---
 test/test-lib.el |   35 +++++++++++++++++++++++++++++++++++
 test/test-lib.sh |    5 +++--
 2 files changed, 38 insertions(+), 2 deletions(-)
 create mode 100644 test/test-lib.el

diff --git a/test/test-lib.el b/test/test-lib.el
new file mode 100644
index 0000000..9439996
--- /dev/null
+++ b/test/test-lib.el
@@ -0,0 +1,35 @@
+;; test-lib.el --- auxiliary stuff for Notmuch Emacs tests.
+;;
+;; Copyright © Carl Worth
+;; Copyright © David Edmondson
+;;
+;; This file is part of Notmuch test suit.
+;;
+;; Notmuch is free software: you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+;;
+;; Notmuch 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
+;; General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with Notmuch.  If not, see <http://www.gnu.org/licenses/>.
+;;
+;; Authors: Dmitry Kurochkin <dmitry.kuroch...@gmail.com>
+
+(defun visible-buffer-string ()
+  "Same as `buffer-string', but excludes invisible text."
+  (visible-buffer-substring (point-min) (point-max)))
+
+(defun visible-buffer-substring (start end)
+  "Same as `buffer-substring', but excludes invisible text."
+  (let (str)
+    (while (< start end)
+      (let ((next-pos (next-char-property-change start end)))
+       (when (not (invisible-p start))
+         (setq str (concat str (buffer-substring start next-pos))))
+       (setq start next-pos)))
+    str))
diff --git a/test/test-lib.sh b/test/test-lib.sh
index 7cc43cd..9645567 100755
--- a/test/test-lib.sh
+++ b/test/test-lib.sh
@@ -843,9 +843,9 @@ fi
 #
 # --no-site-file       Don't load the site-wide startup stuff
 #
-# --directory          Ensure that the local notmuch.el source is found
+# --directory          Ensure that the local elisp sources are found
 #
-# --load               Force loading of notmuch.el
+# --load               Force loading of notmuch.el and test-lib.el
 #
 # notmuch-test-wait    Function for tests to use to wait for process completion
 #
@@ -855,6 +855,7 @@ fi
 
 emacs \$BATCH --no-init-file --no-site-file \
        --directory ../../emacs --load notmuch.el \
+       --directory .. --load test-lib.el \
        --eval "(defun notmuch-test-wait ()
                        (while (get-buffer-process (current-buffer))
                                (sleep-for 0.1)))" \
-- 
1.7.5.1

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