Tests for module 'astrxfrm'.

[gnulib.git] / tests / test-astrxfrm.c

diff --git a/tests/test-astrxfrm.c b/tests/test-astrxfrm.c
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+/* Test of astrxfrm() function.
+   Copyright (C) 2010 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>, 2010.  */
+
+#include <config.h>
+
+#include "astrxfrm.h"
+
+#include <locale.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main ()
+{
+  const char input[] = "B\303\266se B\303\274bchen"; /* "Böse Bübchen" */
+  char *expected_transform;
+
+  setlocale (LC_ALL, "de_DE.UTF-8");
+
+  /* Test resultbuf = NULL.  */
+  {
+    size_t length = 0;
+    char *transform = astrxfrm (input, NULL, &length);
+    ASSERT (transform != NULL);
+    ASSERT (length == strlen (transform) + 1);
+    expected_transform = transform;
+  }
+
+  /* Test resultbuf = NULL.  Initial value of length is ignored here.  */
+  {
+    size_t length = 100;
+    char *transform = astrxfrm (input, NULL, &length);
+    ASSERT (transform != NULL);
+    ASSERT (strcmp (transform, expected_transform) == 0);
+    ASSERT (length == strlen (transform) + 1);
+  }
+
+  /* Test resultbuf != NULL with an initial length = 0.  */
+  {
+    char buf[1];
+    size_t length = 0;
+    char *transform;
+    buf[0] = '@';
+    transform = astrxfrm (input, buf, &length);
+    ASSERT (transform != NULL);
+    ASSERT (transform != buf);
+    ASSERT (strcmp (transform, expected_transform) == 0);
+    ASSERT (length == strlen (transform) + 1);
+    ASSERT (buf[0] == '@');
+  }
+
+  /* Test resultbuf != NULL with an initial length that is too small.  */
+  {
+    char buf[3];
+    size_t length = sizeof (buf) - 1;
+    char *transform;
+    buf[sizeof (buf) - 1] = '@';
+    transform = astrxfrm (input, buf, &length);
+    ASSERT (transform != NULL);
+    ASSERT (transform != buf);
+    ASSERT (strcmp (transform, expected_transform) == 0);
+    ASSERT (length == strlen (transform) + 1);
+    ASSERT (buf[sizeof (buf) - 1] == '@');
+  }
+
+  /* Test resultbuf != NULL with an initial length that is large enough.  */
+  {
+    char buf[200];
+    size_t length = sizeof (buf) - 1;
+    char *transform;
+    buf[sizeof (buf) - 1] = '@';
+    transform = astrxfrm (input, buf, &length);
+    ASSERT (transform != NULL);
+    ASSERT (transform == buf);
+    ASSERT (strcmp (transform, expected_transform) == 0);
+    ASSERT (length == strlen (transform) + 1);
+    ASSERT (buf[sizeof (buf) - 1] == '@');
+  }
+
+  return 0;
+}