1 files changed, 40 insertions, 0 deletions
diff --git a/gnulib-tests/test-iswblank.c b/gnulib-tests/test-iswblank.c
new file mode 100644
index 0000000..6d5d138
--- /dev/null
+++ b/gnulib-tests/test-iswblank.c
@@ -0,0 +1,40 @@
+/* Test of iswblank() 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/>.  */
+
+#include <config.h>
+
+#include <wctype.h>
+
+#include "macros.h"
+
+/* Check that WEOF is defined.  */
+wint_t e = WEOF;
+
+int
+main (void)
+{
+  /* Check that the function exist as a function or as a macro.  */
+  (void) iswblank (0);
+  /* Check that the isw* functions map WEOF to 0.  */
+  ASSERT (!iswblank (e));
+
+  /* Sanity check for the iswblank function.  */
+  ASSERT (iswblank (L' '));
+  ASSERT (iswblank (L'\t'));
+  ASSERT (!iswblank (L'\n'));
+
+  return 0;
+}