wctrans: Add tests.

* tests/test-wctrans.c: New file, based on tests/test-c32_get_mapping.c.
* modules/wctrans-tests: New file.

ChangeLog

@@ -1,3 +1,9 @@
+2023-07-26  Bruno Haible  <bruno@clisp.org>
+
+	wctrans: Add tests.
+	* tests/test-wctrans.c: New file, based on tests/test-c32_get_mapping.c.
+	* modules/wctrans-tests: New file.
+
 2023-07-26  Bruno Haible  <bruno@clisp.org>
 
 	fnmatch: Update dependencies.

modules/wctrans-tests

@@ -0,0 +1,12 @@
+Files:
+tests/test-wctrans.c
+tests/signature.h
+tests/macros.h
+
+Depends-on:
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-wctrans
+check_PROGRAMS += test-wctrans

tests/test-wctrans.c

@@ -0,0 +1,43 @@
+/* Test of getting descriptor for a wide character mapping.
+   Copyright (C) 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>, 2023.  */
+
+#include <config.h>
+
+#include <wctype.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (wctrans, wctrans_t, (const char *));
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  wctrans_t desc;
+
+  desc = wctrans ("any");
+  ASSERT (desc == (wctrans_t) 0);
+
+  desc = wctrans ("tolower");
+  ASSERT (desc != (wctrans_t) 0);
+
+  desc = wctrans ("toupper");
+  ASSERT (desc != (wctrans_t) 0);
+
+  return 0;
+}