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changeset 11338:131a67eedf7f

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Tests for module 'unicase/u8-casecmp'.
author Bruno Haible <bruno@clisp.org>
date Sun, 08 Mar 2009 16:37:11 +0100
parents 25df69468263
children 8c852971bc55
files ChangeLog modules/unicase/u8-casecmp-tests tests/unicase/test-casecmp.h tests/unicase/test-u8-casecmp.c
diffstat 4 files changed, 433 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2009-03-08  Bruno Haible  <bruno@clisp.org>
 
+	Tests for module 'unicase/u8-casecmp'.
+	* modules/unicase/u8-casecmp-tests: New file.
+	* tests/unicase/test-u8-casecmp.c: New file.
+	* tests/unicase/test-casecmp.h: New file.
+
 	New module 'unicase/u32-casecmp'.
 	* lib/unicase/u32-casecmp.c: New file.
 	* modules/unicase/u32-casecmp: New file.
new file mode 100644
--- /dev/null
+++ b/modules/unicase/u8-casecmp-tests
@@ -0,0 +1,14 @@
+Files:
+tests/unicase/test-u8-casecmp.c
+tests/unicase/test-casecmp.h
+
+Depends-on:
+uninorm/nfd
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-u8-casecmp
+check_PROGRAMS += test-u8-casecmp
+test_u8_casecmp_SOURCES = unicase/test-u8-casecmp.c
+
new file mode 100644
--- /dev/null
+++ b/tests/unicase/test-casecmp.h
@@ -0,0 +1,69 @@
+/* Test of case and normalization insensitive comparison of Unicode strings.
+   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.  */
+
+static void
+test_ascii (int (*my_casecmp) (const UNIT *, size_t, const UNIT *, size_t, const char *, uninorm_t, int *),
+	    uninorm_t nf)
+{
+  /* Empty string.  */
+  {
+    int cmp;
+
+    ASSERT (my_casecmp (NULL, 0, NULL, 0, NULL, nf, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+  {
+    static const UNIT input[] = { 'x', 'y' };
+    int cmp;
+
+    ASSERT (my_casecmp (input, SIZEOF (input), NULL, 0, NULL, nf, &cmp) == 0);
+    ASSERT (cmp == 1);
+
+    ASSERT (my_casecmp (NULL, 0, input, SIZEOF (input), NULL, nf, &cmp) == 0);
+    ASSERT (cmp == -1);
+
+    ASSERT (my_casecmp (input, SIZEOF (input), input, SIZEOF (input), NULL, nf, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+
+  /* Normal lexicographic order.  */
+  {
+    static const UNIT input1[] = { 'A', 'm', 'e', 'r', 'i', 'c', 'a' };
+    static const UNIT input2[] = { 'A', 'm', 'i', 'g', 'o' };
+    int cmp;
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input2, SIZEOF (input2), NULL, nf, &cmp) == 0);
+    ASSERT (cmp == -1);
+
+    ASSERT (my_casecmp (input2, SIZEOF (input2), input1, SIZEOF (input1), NULL, nf, &cmp) == 0);
+    ASSERT (cmp == 1);
+  }
+
+  /* Shorter and longer strings.  */
+  {
+    static const UNIT input1[] = { 'R', 'e', 'a', 'g', 'a', 'n' };
+    static const UNIT input2[] = { 'R', 'e', 'a', 'g', 'a', 'n', 'o', 'm', 'i', 'c', 's' };
+    int cmp;
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input2, SIZEOF (input2), NULL, nf, &cmp) == 0);
+    ASSERT (cmp == -1);
+
+    ASSERT (my_casecmp (input2, SIZEOF (input2), input1, SIZEOF (input1), NULL, nf, &cmp) == 0);
+    ASSERT (cmp == 1);
+  }
+}
new file mode 100644
--- /dev/null
+++ b/tests/unicase/test-u8-casecmp.c
@@ -0,0 +1,345 @@
+/* Test of case and normalization insensitive comparison of UTF-8 strings.
+   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 "uninorm.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-casecmp.h"
+#undef UNIT
+
+static void
+test_nonascii (int (*my_casecmp) (const uint8_t *, size_t, const uint8_t *, size_t, const char *, uninorm_t, int *))
+{
+  /* Normalization effects.  */
+  {
+    static const uint8_t input1[] = { 'H', 0xC3, 0xB6, 'h', 'l', 'e' };
+    static const uint8_t input2[] = { 'H', 'O', 0xCC, 0x88, 'h', 'L', 'e' };
+    static const uint8_t input3[] = { 'H', 0xC3, 0xB6, 'h', 'l', 'e', 'n' };
+    static const uint8_t input4[] = { 'H', 'O', 0xCC, 0x88, 'h', 'L', 'e', 'n' };
+    static const uint8_t input5[] = { 'H', 'u', 'r', 'z' };
+    int cmp;
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input2, SIZEOF (input2), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input2, SIZEOF (input2), input1, SIZEOF (input1), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input3, SIZEOF (input3), input4, SIZEOF (input4), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input4, SIZEOF (input4), input3, SIZEOF (input3), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input2, SIZEOF (input2), input3, SIZEOF (input3), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == -1);
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input4, SIZEOF (input4), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == -1);
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input5, SIZEOF (input5), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == -1);
+
+    ASSERT (my_casecmp (input2, SIZEOF (input2), input5, SIZEOF (input5), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == -1);
+  }
+  { /* LATIN CAPITAL LETTER A WITH DIAERESIS */
+    static const uint8_t input1[] = { 0xC3, 0x84 };
+    static const uint8_t input2[] = { 0x41, 0xCC, 0x88 };
+    int cmp;
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input2, SIZEOF (input2), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+  { /* LATIN CAPITAL LETTER A WITH DIAERESIS AND MACRON */
+    static const uint8_t input1[] = { 0xC7, 0x9E };
+    static const uint8_t input2[] = { 0x41, 0xCC, 0x88, 0xCC, 0x84 };
+    int cmp;
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input2, SIZEOF (input2), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+  { /* GREEK DIALYTIKA AND PERISPOMENI */
+    static const uint8_t input1[] = { 0xE1, 0xBF, 0x81 };
+    static const uint8_t input2[] = { 0xC2, 0xA8, 0xCD, 0x82 };
+    int cmp;
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input2, SIZEOF (input2), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+  { /* HANGUL SYLLABLE GEUL */
+    static const uint8_t input1[] = { 0xEA, 0xB8, 0x80 };
+    static const uint8_t input2[] = { 0xEA, 0xB7, 0xB8, 0xE1, 0x86, 0xAF };
+    static const uint8_t input3[] = { 0xE1, 0x84, 0x80, 0xE1, 0x85, 0xB3, 0xE1, 0x86, 0xAF };
+    int cmp;
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input2, SIZEOF (input2), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input3, SIZEOF (input3), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+  { /* HANGUL SYLLABLE GEU */
+    static const uint8_t input1[] = { 0xEA, 0xB7, 0xB8 };
+    static const uint8_t input2[] = { 0xE1, 0x84, 0x80, 0xE1, 0x85, 0xB3 };
+    int cmp;
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input2, SIZEOF (input2), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+
+  /* Simple string.  */
+  { /* "Grüß Gott. Здравствуйте! x=(-b±sqrt(b²-4ac))/(2a)  日本語,中文,한글" */
+    static const uint8_t input1[] =
+      { 'G', 'r', 0xC3, 0xBC, 0xC3, 0x9F, ' ', 'G', 'o', 't', 't', '.', ' ',
+	0xD0, 0x97, 0xD0, 0xB4, 0xD1, 0x80, 0xD0, 0xB0, 0xD0, 0xB2, 0xD1, 0x81,
+	0xD1, 0x82, 0xD0, 0xB2, 0xD1, 0x83, 0xD0, 0xB9, 0xD1, 0x82, 0xD0, 0xB5,
+	'!', ' ', 'x', '=', '(', '-', 'b', 0xC2, 0xB1, 's', 'q', 'r', 't', '(',
+	'b', 0xC2, 0xB2, '-', '4', 'a', 'c', ')', ')', '/', '(', '2', 'a', ')',
+	' ', ' ', 0xE6, 0x97, 0xA5, 0xE6, 0x9C, 0xAC, 0xE8, 0xAA, 0x9E, ',',
+	0xE4, 0xB8, 0xAD, 0xE6, 0x96, 0x87, ',',
+	0xED, 0x95, 0x9C, 0xEA, 0xB8, 0x80, '\n'
+      };
+    static const uint8_t input2[] =
+      { 'g', 'r', 0xC3, 0xBC, 0x73, 0x73, ' ', 'g', 'o', 't', 't', '.', ' ',
+	0xD0, 0xB7, 0xD0, 0xB4, 0xD1, 0x80, 0xD0, 0xB0, 0xD0, 0xB2, 0xD1, 0x81,
+	0xD1, 0x82, 0xD0, 0xB2, 0xD1, 0x83, 0xD0, 0xB9, 0xD1, 0x82, 0xD0, 0xB5,
+	'!', ' ', 'x', '=', '(', '-', 'b', 0xC2, 0xB1, 's', 'q', 'r', 't', '(',
+	'b', 0xC2, 0xB2, '-', '4', 'a', 'c', ')', ')', '/', '(', '2', 'a', ')',
+	' ', ' ', 0xE6, 0x97, 0xA5, 0xE6, 0x9C, 0xAC, 0xE8, 0xAA, 0x9E, ',',
+	0xE4, 0xB8, 0xAD, 0xE6, 0x96, 0x87, ',',
+	0xED, 0x95, 0x9C, 0xEA, 0xB8, 0x80, '\n'
+      };
+    static const uint8_t input3[] =
+      { 'G', 'R', 0xC3, 0x9C, 0x53, 0x53, ' ', 'G', 'O', 'T', 'T', '.', ' ',
+	0xD0, 0x97, 0xD0, 0x94, 0xD0, 0xA0, 0xD0, 0x90, 0xD0, 0x92, 0xD0, 0xA1,
+	0xD0, 0xA2, 0xD0, 0x92, 0xD0, 0xA3, 0xD0, 0x99, 0xD0, 0xA2, 0xD0, 0x95,
+	'!', ' ', 'X', '=', '(', '-', 'B', 0xC2, 0xB1, 'S', 'Q', 'R', 'T', '(',
+	'B', 0xC2, 0xB2, '-', '4', 'A', 'C', ')', ')', '/', '(', '2', 'A', ')',
+	' ', ' ', 0xE6, 0x97, 0xA5, 0xE6, 0x9C, 0xAC, 0xE8, 0xAA, 0x9E, ',',
+	0xE4, 0xB8, 0xAD, 0xE6, 0x96, 0x87, ',',
+	0xED, 0x95, 0x9C, 0xEA, 0xB8, 0x80, '\n'
+      };
+    int cmp;
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input2, SIZEOF (input2), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input2, SIZEOF (input2), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input3, SIZEOF (input3), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input3, SIZEOF (input3), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input2, SIZEOF (input2), input3, SIZEOF (input3), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input2, SIZEOF (input2), input3, SIZEOF (input3), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+
+  /* Case mapping can increase the number of Unicode characters.  */
+  { /* LATIN SMALL LETTER N PRECEDED BY APOSTROPHE */
+    static const uint8_t input1[] = { 0xC5, 0x89 };
+    static const uint8_t input2[] = { 0xCA, 0xBC, 0x6E };
+    static const uint8_t input3[] = { 0xCA, 0xBC, 0x4E };
+    int cmp;
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input2, SIZEOF (input2), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input2, SIZEOF (input2), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input3, SIZEOF (input3), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input3, SIZEOF (input3), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+  { /* GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS */
+    static const uint8_t input1[] = { 0xCE, 0x90 };
+    static const uint8_t input2[] = { 0xCE, 0xB9, 0xCC, 0x88, 0xCC, 0x81 };
+    int cmp;
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input2, SIZEOF (input2), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input2, SIZEOF (input2), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+
+  /* Turkish letters i İ ı I */
+  { /* LATIN CAPITAL LETTER I */
+    static const uint8_t input[]         = { 0x49 };
+    static const uint8_t casefolded[]    = { 0x69 };
+    static const uint8_t casefolded_tr[] = { 0xC4, 0xB1 };
+    int cmp;
+
+    ASSERT (my_casecmp (input, SIZEOF (input), casefolded, SIZEOF (casefolded), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input, SIZEOF (input), casefolded_tr, SIZEOF (casefolded_tr), "tr", NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+  { /* LATIN SMALL LETTER I */
+    static const uint8_t input[]         = { 0x69 };
+    static const uint8_t casefolded[]    = { 0x49 };
+    static const uint8_t casefolded_tr[] = { 0xC4, 0xB0 };
+    int cmp;
+
+    ASSERT (my_casecmp (input, SIZEOF (input), casefolded, SIZEOF (casefolded), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input, SIZEOF (input), casefolded_tr, SIZEOF (casefolded_tr), "tr", NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+  { /* LATIN CAPITAL LETTER I WITH DOT ABOVE */
+    static const uint8_t input[]         = { 0xC4, 0xB0 };
+    static const uint8_t casefolded[]    = { 0x69, 0xCC, 0x87 };
+    static const uint8_t casefolded_tr[] = { 0x69 };
+    int cmp;
+
+    ASSERT (my_casecmp (input, SIZEOF (input), casefolded, SIZEOF (casefolded), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input, SIZEOF (input), casefolded_tr, SIZEOF (casefolded_tr), "tr", NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+  { /* LATIN SMALL LETTER DOTLESS I */
+    static const uint8_t input[]      = { 0xC4, 0xB1 };
+    static const uint8_t casefolded[] = { 0x49 };
+    int cmp;
+
+    ASSERT (my_casecmp (input, SIZEOF (input), casefolded, SIZEOF (casefolded), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp == 1);
+
+    ASSERT (my_casecmp (input, SIZEOF (input), casefolded, SIZEOF (casefolded), "tr", NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+  { /* "topkapı" */
+    static const uint8_t input[] =
+      { 0x54, 0x4F, 0x50, 0x4B, 0x41, 0x50, 0x49 };
+    static const uint8_t casefolded[] =
+      { 0x74, 0x6F, 0x70, 0x6B, 0x61, 0x70, 0xC4, 0xB1 };
+    int cmp;
+
+    ASSERT (my_casecmp (input, SIZEOF (input), casefolded, SIZEOF (casefolded), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp == -1);
+
+    ASSERT (my_casecmp (input, SIZEOF (input), casefolded, SIZEOF (casefolded), "tr", NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+
+  /* Uppercasing can increase the number of Unicode characters.  */
+  { /* "heiß" */
+    static const uint8_t input1[] = { 0x68, 0x65, 0x69, 0xC3, 0x9F };
+    static const uint8_t input2[] = { 0x68, 0x65, 0x69, 0x73, 0x73 };
+    int cmp;
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input2, SIZEOF (input2), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+
+  /* Case mappings for some characters can depend on the surrounding characters.  */
+  { /* "περισσότερες πληροφορίες" */
+    static const uint8_t input1[] =
+      {
+	0xCF, 0x80, 0xCE, 0xB5, 0xCF, 0x81, 0xCE, 0xB9, 0xCF, 0x83, 0xCF, 0x83,
+	0xCF, 0x8C, 0xCF, 0x84, 0xCE, 0xB5, 0xCF, 0x81, 0xCE, 0xB5, 0xCF, 0x82,
+	' ', 0xCF, 0x80, 0xCE, 0xBB, 0xCE, 0xB7, 0xCF, 0x81, 0xCE, 0xBF,
+	0xCF, 0x86, 0xCE, 0xBF, 0xCF, 0x81, 0xCE, 0xAF, 0xCE, 0xB5, 0xCF, 0x82
+      };
+    static const uint8_t input2[] =
+      {
+	0xCF, 0x80, 0xCE, 0xB5, 0xCF, 0x81, 0xCE, 0xB9, 0xCF, 0x83, 0xCF, 0x83,
+	0xCF, 0x8C, 0xCF, 0x84, 0xCE, 0xB5, 0xCF, 0x81, 0xCE, 0xB5, 0xCF, 0x83,
+	' ', 0xCF, 0x80, 0xCE, 0xBB, 0xCE, 0xB7, 0xCF, 0x81, 0xCE, 0xBF,
+	0xCF, 0x86, 0xCE, 0xBF, 0xCF, 0x81, 0xCE, 0xAF, 0xCE, 0xB5, 0xCF, 0x83
+      };
+    static const uint8_t input3[] =
+      {
+	0xCE, 0xA0, 0xCE, 0x95, 0xCE, 0xA1, 0xCE, 0x99, 0xCE, 0xA3, 0xCE, 0xA3,
+	0xCE, 0x8C, 0xCE, 0xA4, 0xCE, 0x95, 0xCE, 0xA1, 0xCE, 0x95, 0xCE, 0xA3,
+	' ', 0xCE, 0xA0, 0xCE, 0x9B, 0xCE, 0x97, 0xCE, 0xA1, 0xCE, 0x9F,
+	0xCE, 0xA6, 0xCE, 0x9F, 0xCE, 0xA1, 0xCE, 0x8A, 0xCE, 0x95, 0xCE, 0xA3
+      };
+    int cmp;
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input2, SIZEOF (input2), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input1, SIZEOF (input1), input3, SIZEOF (input3), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input2, SIZEOF (input2), input3, SIZEOF (input3), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+
+  /* Case mapping can require subsequent normalization.  */
+  { /* LATIN SMALL LETTER J WITH CARON, COMBINING DOT BELOW */
+    static const uint8_t input[]                 = { 0xC7, 0xB0, 0xCC, 0xA3 };
+    static const uint8_t casefolded[]            = { 0x6A, 0xCC, 0x8C, 0xCC, 0xA3 };
+    static const uint8_t casefolded_decomposed[] = { 0x6A, 0xCC, 0xA3, 0xCC, 0x8C };
+    int cmp;
+
+    ASSERT (my_casecmp (input, SIZEOF (input), casefolded, SIZEOF (casefolded), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input, SIZEOF (input), casefolded_decomposed, SIZEOF (casefolded_decomposed), NULL, NULL, &cmp) == 0);
+    ASSERT (cmp != 0);
+
+    ASSERT (my_casecmp (input, SIZEOF (input), casefolded, SIZEOF (casefolded), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+
+    ASSERT (my_casecmp (input, SIZEOF (input), casefolded_decomposed, SIZEOF (casefolded_decomposed), NULL, UNINORM_NFD, &cmp) == 0);
+    ASSERT (cmp == 0);
+  }
+}
+
+int
+main ()
+{
+  test_ascii (u8_casecmp, UNINORM_NFD);
+  test_nonascii (u8_casecmp);
+
+  return 0;
+}