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diff --git a/tests/unigbrk/test-u32-grapheme-breaks.c b/tests/unigbrk/test-u32-grapheme-breaks.c
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+/* Grapheme cluster breaks test.
+ Copyright (C) 2010-2015 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Lesser 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* Written by Ben Pfaff <blp@cs.stanford.edu>, 2010. */
+
+#include <config.h>
+
+/* Specification. */
+#include <unigbrk.h>
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+static void
+test_u32_grapheme_breaks (const char *expected, ...)
+{
+ size_t n = strlen (expected);
+ uint32_t s[16];
+ va_list args;
+ char breaks[16];
+ size_t i;
+
+ ASSERT (n <= 16);
+
+ memset (breaks, 0xcc, n);
+
+ va_start (args, expected);
+ for (i = 0; i < n; i++)
+ {
+ int unit = va_arg (args, int);
+ ASSERT (unit >= 0);
+ s[i] = unit;
+ }
+ ASSERT (va_arg (args, int) == -1);
+ va_end (args);
+
+ u32_grapheme_breaks (s, n, breaks);
+ for (i = 0; i < n; i++)
+ if (breaks[i] != (expected[i] == '#'))
+ {
+ size_t j;
+
+ fprintf (stderr, "wrong grapheme breaks:\n");
+
+ fprintf (stderr, " input:");
+ for (j = 0; j < n; j++)
+ fprintf (stderr, " %02x", s[j]);
+ putc ('\n', stderr);
+
+ fprintf (stderr, "expected:");
+ for (j = 0; j < n; j++)
+ fprintf (stderr, " %d", expected[j] == '#');
+ putc ('\n', stderr);
+
+ fprintf (stderr, " actual:");
+ for (j = 0; j < n; j++)
+ fprintf (stderr, " %d", breaks[j]);
+ putc ('\n', stderr);
+
+ abort ();
+ }
+}
+
+int
+main (void)
+{
+ /* Standalone 1-unit graphemes. */
+ test_u32_grapheme_breaks ("#", 'a', -1);
+ test_u32_grapheme_breaks ("##", 'a', 'b', -1);
+ test_u32_grapheme_breaks ("###", 'a', 'b', 'c', -1);
+
+#define HIRAGANA_A 0x3042 /* あ: Hiragana letter 'a'. */
+ test_u32_grapheme_breaks ("#", HIRAGANA_A, -1);
+ test_u32_grapheme_breaks ("##", HIRAGANA_A, 'x', -1);
+ test_u32_grapheme_breaks ("##", HIRAGANA_A, HIRAGANA_A, -1);
+
+ /* Combining accents. */
+#define GRAVE 0x0300 /* Combining grave accent. */
+#define ACUTE 0x0301 /* Combining acute accent. */
+ test_u32_grapheme_breaks ("#_", 'e', ACUTE, -1);
+ test_u32_grapheme_breaks ("#__", 'e', ACUTE, GRAVE, -1);
+ test_u32_grapheme_breaks ("#_#", 'e', ACUTE, 'x', -1);
+ test_u32_grapheme_breaks ("#_#_", 'e', ACUTE, 'e', GRAVE, -1);
+
+ return 0;
+}