--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2008-05-10  Bruno Haible  <bruno@clisp.org>
 
+	* modules/unilbrk/ulc-possible-linebreaks-tests: New file.
+	* tests/unilbrk/test-ulc-possible-linebreaks.c: New file.
+
 	* modules/unilbrk/u32-possible-linebreaks-tests: New file.
 	* tests/unilbrk/test-u32-possible-linebreaks.c: New file.
 

new file mode 100644
--- /dev/null
+++ b/modules/unilbrk/ulc-possible-linebreaks-tests
@@ -0,0 +1,13 @@
+Files:
+tests/unilbrk/test-ulc-possible-linebreaks.c
+
+Depends-on:
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-ulc-possible-linebreaks
+check_PROGRAMS += test-ulc-possible-linebreaks
+test_ulc_possible_linebreaks_SOURCES = unilbrk/test-ulc-possible-linebreaks.c
+test_ulc_possible_linebreaks_LDADD = $(LDADD) @LIBICONV@
+

new file mode 100644
--- /dev/null
+++ b/tests/unilbrk/test-ulc-possible-linebreaks.c
@@ -0,0 +1,66 @@
+/* Test of line breaking of strings.
+   Copyright (C) 2008 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include "unilbrk.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#define SIZEOF(array) (sizeof (array) / sizeof (array[0]))
+#define ASSERT(expr) \
+  do									     \
+    {									     \
+      if (!(expr))							     \
+        {								     \
+          fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+          fflush (stderr);						     \
+          abort ();							     \
+        }								     \
+    }									     \
+  while (0)
+
+int
+main ()
+{
+  /* Test case n = 0.  */
+  ulc_possible_linebreaks (NULL, 0, "GB18030", NULL);
+
+#if HAVE_ICONV
+  {
+    static const char input[36] =
+      /* "Grüß Gott. x=(-b±sqrt(b²-4ac))/(2a)" */
+      "Gr\374\337 Gott. x=(-b\261sqrt(b\262-4ac))/(2a)\n";
+    char *p = (char *) malloc (SIZEOF (input));
+    size_t i;
+
+    ulc_possible_linebreaks (input, SIZEOF (input), "ISO-8859-1", p);
+    for (i = 0; i < 36; i++)
+      {
+	ASSERT (p[i] == (i == 35 ? UC_BREAK_MANDATORY :
+			 i == 5 || i == 11 || i == 13 || i == 15 || i == 16
+			 || i == 21 || i == 25 || i == 31 ? UC_BREAK_POSSIBLE :
+			 UC_BREAK_PROHIBITED));
+      }
+    free (p);
+  }
+#endif
+
+  return 0;
+}