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diff --git a/tests/unicase/test-u8-is-casefolded.c b/tests/unicase/test-u8-is-casefolded.c
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+/* Test of test whether an UTF-8 string is already case-folded.
+ Copyright (C) 2009 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>, 2009. */
+
+#include <config.h>
+
+#include "unicase.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "unistr.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)
+
+#define UNIT uint8_t
+#include "test-is-casefolded.h"
+#undef UNIT
+
+static void
+test_nonascii (int (*my_is) (const uint8_t *, size_t, const char *, bool *))
+{
+ /* Test cases from Unicode 5.1.0. */
+ {
+ static const uint8_t input[] = { 0xC3, 0x9F };
+ bool result;
+
+ ASSERT (my_is (input, SIZEOF (input), NULL, &result) == 0);
+ ASSERT (result == false);
+ }
+}
+
+int
+main ()
+{
+ test_ascii (u8_is_casefolded);
+ test_nonascii (u8_is_casefolded);
+
+ return 0;
+}