--- /dev/null
+/* Test of buffer that accumulates a string by piecewise concatenation.
+ Copyright (C) 2021 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 2, 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 <https://www.gnu.org/licenses/>. */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2021. */
+
+#include <config.h>
+
+#include "string-buffer.h"
+
+#include <string.h>
+
+#include "macros.h"
+
+static int
+my_appendf (struct string_buffer *buffer, const char *formatstring, ...)
+{
+ va_list args;
+
+ va_start (args, formatstring);
+ int ret = sb_appendvf (buffer, formatstring, args);
+ va_end (args);
+
+ return ret;
+}
+
+char invalid_format_string_1[] = "%&";
+char invalid_format_string_2[] = "%^";
+
+int
+main ()
+{
+ /* Test simple string concatenation. */
+ {
+ struct string_buffer buffer;
+
+ sb_init (&buffer);
+ char *s = sb_dupfree (&buffer);
+ ASSERT (s != NULL && strcmp (s, "") == 0);
+ free (s);
+ }
+
+ {
+ struct string_buffer buffer;
+
+ sb_init (&buffer);
+ sb_append (&buffer, "abc");
+ sb_append (&buffer, "");
+ sb_append (&buffer, "defg");
+ char *s = sb_dupfree (&buffer);
+ ASSERT (s != NULL && strcmp (s, "abcdefg") == 0);
+ free (s);
+ }
+
+ /* Test printf-like formatting. */
+ {
+ struct string_buffer buffer;
+
+ sb_init (&buffer);
+ sb_append (&buffer, "<");
+ sb_appendf (&buffer, "%x", 3735928559U);
+ sb_append (&buffer, ">");
+ char *s = sb_dupfree (&buffer);
+ ASSERT (s != NULL && strcmp (s, "<deadbeef>") == 0);
+ free (s);
+ }
+
+ /* Test vprintf-like formatting. */
+ {
+ struct string_buffer buffer;
+
+ sb_init (&buffer);
+ sb_append (&buffer, "<");
+ my_appendf (&buffer, "%x", 3735928559U);
+ sb_append (&buffer, ">");
+ char *s = sb_dupfree (&buffer);
+ ASSERT (s != NULL && strcmp (s, "<deadbeef>") == 0);
+ free (s);
+ }
+
+ /* Test printf-like formatting failure. */
+ {
+ struct string_buffer buffer;
+
+ sb_init (&buffer);
+ sb_append (&buffer, "<");
+ sb_appendf (&buffer, invalid_format_string_1, 1);
+ sb_append (&buffer, "|");
+ sb_appendf (&buffer, invalid_format_string_2, 2);
+ sb_append (&buffer, ">");
+ char *s = sb_dupfree (&buffer);
+ ASSERT (s == NULL);
+ }
+
+ return 0;
+}