--- a/ChangeLog	Sat Feb 21 15:51:29 2009 +0100
+++ b/ChangeLog	Sat Feb 21 15:52:35 2009 +0100
@@ -1,5 +1,9 @@
 2009-02-21  Bruno Haible  <bruno@clisp.org>
 
+	Tests for module 'uninorm/filter'.
+	* tests/uninorm/test-uninorm-filter-nfc.c: New file.
+	* modules/uninorm/filter-tests: New file.
+
 	New module 'uninorm/filter'.
 	* lib/uninorm.h (uninorm_filter_create, uninorm_filter_write,
 	uninorm_filter_flush, uninorm_filter_free): New declarations.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/uninorm/filter-tests	Sat Feb 21 15:52:35 2009 +0100
@@ -0,0 +1,14 @@
+Files:
+tests/uninorm/test-uninorm-filter-nfc.c
+
+Depends-on:
+unistr/u32-cmp
+uninorm/nfc
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-uninorm-filter-nfc
+check_PROGRAMS += test-uninorm-filter-nfc
+test_uninorm_filter_nfc_SOURCES = uninorm/test-uninorm-filter-nfc.c
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/uninorm/test-uninorm-filter-nfc.c	Sat Feb 21 15:52:35 2009 +0100
@@ -0,0 +1,122 @@
+/* Test of canonical normalization of streams.
+   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 "uninorm.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)
+
+/* A stream of Unicode characters that simply accumulates the contents.  */
+
+struct accumulator
+{
+  uint32_t *result;
+  size_t length;
+  size_t allocated;
+};
+
+static int
+write_to_accumulator (void *stream_data, ucs4_t uc)
+{
+  struct accumulator *accu = (struct accumulator *) stream_data;
+
+  if (accu->length == accu->allocated)
+    {
+      accu->allocated = 2 * accu->allocated + 1;
+      accu->result = (uint32_t *) realloc (accu->result, accu->allocated * sizeof (uint32_t));
+    }
+  accu->result[accu->length] = uc;
+  accu->length++;
+  return 0;
+}
+
+static int
+check (const uint32_t *input, size_t input_length,
+       const uint32_t *expected, size_t expected_length)
+{
+  struct accumulator accu;
+  struct uninorm_filter *filter;
+  size_t i;
+
+  accu.result = NULL;
+  accu.length = 0;
+  accu.allocated = 0;
+
+  filter = uninorm_filter_create (UNINORM_NFC, write_to_accumulator, &accu);
+  ASSERT (filter != NULL);
+
+  for (i = 0; i < input_length; i++)
+    ASSERT (uninorm_filter_write (filter, input[i]) == 0);
+
+  ASSERT (uninorm_filter_free (filter) == 0);
+
+  if (!(accu.result != NULL))
+    return 1;
+  if (!(accu.length == expected_length))
+    return 2;
+  if (!(u32_cmp (accu.result, expected, expected_length) == 0))
+    return 3;
+  free (accu.result);
+
+  return 0;
+}
+
+int
+main ()
+{
+  { /* "Grüß Gott. Здравствуйте! x=(-b±sqrt(b²-4ac))/(2a)  日本語,中文,한글" */
+    static const uint32_t input[] =
+      { 'G', 'r', 0x00FC, 0x00DF, ' ', 'G', 'o', 't', 't', '.', ' ',
+	0x0417, 0x0434, 0x0440, 0x0430, 0x0432, 0x0441, 0x0442, 0x0432, 0x0443,
+	0x0439, 0x0442, 0x0435, '!', ' ',
+	'x', '=', '(', '-', 'b', 0x00B1, 's', 'q', 'r', 't', '(', 'b', 0x00B2,
+	'-', '4', 'a', 'c', ')', ')', '/', '(', '2', 'a', ')', ' ', ' ',
+	0x65E5, 0x672C, 0x8A9E, ',', 0x4E2D, 0x6587, ',', 0xD55C, 0xAE00, '\n'
+      };
+    static const uint32_t decomposed[] =
+      { 'G', 'r', 0x0075, 0x0308, 0x00DF, ' ', 'G', 'o', 't', 't', '.', ' ',
+	0x0417, 0x0434, 0x0440, 0x0430, 0x0432, 0x0441, 0x0442, 0x0432, 0x0443,
+	0x0438, 0x0306, 0x0442, 0x0435, '!', ' ',
+	'x', '=', '(', '-', 'b', 0x00B1, 's', 'q', 'r', 't', '(', 'b', 0x00B2,
+	'-', '4', 'a', 'c', ')', ')', '/', '(', '2', 'a', ')', ' ', ' ',
+	0x65E5, 0x672C, 0x8A9E, ',', 0x4E2D, 0x6587, ',',
+	0x1112, 0x1161, 0x11AB, 0x1100, 0x1173, 0x11AF, '\n'
+      };
+    ASSERT (check (input, SIZEOF (input),           input, SIZEOF (input)) == 0);
+    ASSERT (check (decomposed, SIZEOF (decomposed), input, SIZEOF (input)) == 0);
+  }
+
+  return 0;
+}