sprintf-gnu: Add tests.

* tests/test-sprintf-gnu.c: New file, based on
tests/test-sprintf-posix.c.
* modules/sprintf-gnu-tests: New file, based on
modules/sprintf-posix-tests.

ChangeLog

@@ -1,5 +1,11 @@
 2023-03-24  Bruno Haible  <bruno@clisp.org>
 
+	sprintf-gnu: Add tests.
+	* tests/test-sprintf-gnu.c: New file, based on
+	tests/test-sprintf-posix.c.
+	* modules/sprintf-gnu-tests: New file, based on
+	modules/sprintf-posix-tests.
+
 	sprintf-gnu: New module.
 	* m4/sprintf-posix.m4 (gl_FUNC_SPRINTF_IS_POSIX): New macro,
 	extracted from gl_FUNC_SPRINTF_POSIX.

modules/sprintf-gnu-tests

@@ -0,0 +1,13 @@
+Files:
+tests/test-sprintf-gnu.c
+tests/test-sprintf-gnu.h
+tests/macros.h
+
+Depends-on:
+sprintf-posix-tests
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-sprintf-gnu
+check_PROGRAMS += test-sprintf-gnu

tests/test-sprintf-gnu.c

@@ -0,0 +1,35 @@
+/* Test of POSIX and GNU compatible sprintf() function.
+   Copyright (C) 2007-2023 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 <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+#include "test-sprintf-gnu.h"
+
+int
+main (int argc, char *argv[])
+{
+  test_function (sprintf);
+  return 0;
+}