--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2007-02-14  Bruno Haible  <bruno@clisp.org>
 
+	* modules/mbspcasecmp-tests: New file.
+	* tests/test-mbspcasecmp.sh: New file.
+	* tests/test-mbspcasecmp.c: New file.
+
 	New module mbspcasecmp.
 	* modules/mbspcasecmp: New file.
 	* lib/mbspcasecmp.c: New file.

new file mode 100644
--- /dev/null
+++ b/modules/mbspcasecmp-tests
@@ -0,0 +1,17 @@
+Files:
+tests/test-mbspcasecmp.sh
+tests/test-mbspcasecmp.c
+m4/locale-tr.m4
+m4/codeset.m4
+
+Depends-on:
+
+configure.ac:
+gt_LOCALE_TR_UTF8
+
+Makefile.am:
+TESTS += test-mbspcasecmp.sh
+TESTS_ENVIRONMENT += EXEEXT='@EXEEXT@' LOCALE_TR_UTF8='@LOCALE_TR_UTF8@'
+EXTRA_DIST += test-mbspcasecmp.sh
+check_PROGRAMS += test-mbspcasecmp
+

new file mode 100644
--- /dev/null
+++ b/tests/test-mbspcasecmp.c
@@ -0,0 +1,94 @@
+/* Test of case-insensitive string comparison function.
+   Copyright (C) 2007 Free Software Foundation, Inc.
+
+   This program 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 2, 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <string.h>
+
+#include <locale.h>
+#include <stdlib.h>
+
+#define ASSERT(expr) if (!(expr)) abort ();
+
+int
+main ()
+{
+  /* configure should already have checked that the locale is supported.  */
+  if (setlocale (LC_ALL, "") == NULL)
+    return 1;
+
+  {
+    const char string[] = "paragraph";
+    ASSERT (mbspcasecmp (string, "Paragraph") == string + 9);
+  }
+
+  {
+    const char string[] = "paragrapH";
+    ASSERT (mbspcasecmp (string, "parAgRaph") == string + 9);
+  }
+
+  {
+    const char string[] = "paragraph";
+    ASSERT (mbspcasecmp (string, "paraLyzed") == NULL);
+  }
+
+  {
+    const char string[] = "paraLyzed";
+    ASSERT (mbspcasecmp (string, "paragraph") == NULL);
+  }
+
+  {
+    const char string[] = "para";
+    ASSERT (mbspcasecmp (string, "paragraph") == NULL);
+  }
+
+  {
+    const char string[] = "paragraph";
+    ASSERT (mbspcasecmp (string, "para") == string + 4);
+  }
+
+  /* The following tests shows how mbspcasecmp() is different from
+     strncasecmp().  */
+
+  {
+    const char string[] = "\303\266zg\303\274rt\303\274k"; /* özgürtük */
+    ASSERT (mbspcasecmp (string, "\303\226ZG\303\234R") == string + 7); /* özgür */
+  }
+
+  {
+    const char string[] = "\303\226ZG\303\234Rt\303\274k"; /* özgürtük */
+    ASSERT (mbspcasecmp (string, "\303\266zg\303\274r") == string + 7); /* özgür */
+  }
+
+  /* This test shows how strings of different size can compare equal.  */
+
+  {
+    const char string[] = "turkishtime";
+    ASSERT (mbspcasecmp (string, "TURK\304\260SH") == string + 7);
+  }
+
+  {
+    const char string[] = "TURK\304\260SHK\303\234LT\303\234R";
+    ASSERT (mbspcasecmp (string, "turkish") == string + 8);
+  }
+
+  return 0;
+}

new file mode 100755
--- /dev/null
+++ b/tests/test-mbspcasecmp.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Test whether a specific Turkish locale is installed.
+: ${LOCALE_TR_UTF8=tr_TR.UTF-8}
+if test $LOCALE_TR_UTF8 = none; then
+  if test -f /usr/bin/localedef; then
+    echo "Skipping test: no turkish Unicode locale is installed"
+  else
+    echo "Skipping test: no turkish Unicode locale is supported"
+  fi
+  exit 77
+fi
+
+LC_ALL=$LOCALE_TR_UTF8 \
+./test-mbspcasecmp${EXEEXT}