--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2007-08-18  Bruno Haible  <bruno@clisp.org>
+
+	* modules/fstrcmp-tests: New file.
+	* tests/test-fstrcmp.c: New file.
+
 2007-08-18  Bruno Haible  <bruno@clisp.org>
 
 	* modules/fstrcmp: New file, from GNU gettext with modifications.

new file mode 100644
--- /dev/null
+++ b/modules/fstrcmp-tests
@@ -0,0 +1,12 @@
+Files:
+tests/test-fstrcmp.c
+
+Depends-on:
+stdbool
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-fstrcmp
+check_PROGRAMS += test-fstrcmp
+

new file mode 100644
--- /dev/null
+++ b/tests/test-fstrcmp.c
@@ -0,0 +1,63 @@
+/* Test of fuzzy string comparison.
+   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.  */
+
+#include <config.h>
+
+#include "fstrcmp.h"
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define ASSERT(expr) \
+  do									     \
+    {									     \
+      if (!(expr))							     \
+        {								     \
+          fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+          abort ();							     \
+        }								     \
+    }									     \
+  while (0)
+
+static bool
+check_fstrcmp (const char *string1, const char *string2, double expected)
+{
+  /* The use of 'volatile' guarantees that excess precision bits are dropped
+     before the addition and before the following comparison at the caller's
+     site.  It is necessary on x86 systems where double-floats are not IEEE
+     compliant by default, to avoid that msgmerge results become platform and
+     compiler option dependent.  'volatile' is a portable alternative to gcc's
+     -ffloat-store option.  */
+  volatile double result = fstrcmp (string1, string2);
+  return (result == expected);
+}
+
+int
+main ()
+{
+  ASSERT (check_fstrcmp ("Langstrumpf", "Langstrumpf", 1.0));
+  ASSERT (check_fstrcmp ("Levenshtein", "Levenstein", 20./21.));
+  ASSERT (check_fstrcmp ("Levenstein", "Levenshtein", 20./21.));
+  ASSERT (check_fstrcmp ("xy", "yx", 1./2.));
+  ASSERT (check_fstrcmp ("George Bush", "Abraham Lincoln", 2./13.));
+  ASSERT (check_fstrcmp ("George Bush", "George \"Bugs\" Moran", 2./3.));
+
+  return 0;
+}