1 files changed, 57 insertions, 0 deletions
diff --git a/tests/test-uchar-h.c b/tests/test-uchar-h.c
new file mode 100644
index 00000000..614a5431
--- /dev/null
+++ b/tests/test-uchar-h.c
@@ -0,0 +1,57 @@
+/* Test of <uchar.h> substitute.
+   Copyright (C) 2019-2025 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>, 2019.  */
+
+#include <config.h>
+
+#include <uchar.h>
+
+/* Check that the types are defined.  */
+mbstate_t a = { 0 };
+size_t b = 5;
+char8_t c = 'x';
+char16_t d = 'y';
+char32_t e = 'z';
+
+/* Check that char8_t, char16_t, and char32_t are unsigned types.  */
+static_assert ((char8_t)(-1) >= 0);
+static_assert ((char16_t)(-1) >= 0);
+#if !defined __HP_cc
+static_assert ((char32_t)(-1) >= 0);
+#endif
+
+/* Check that char8_t is at least 8 bits wide.  */
+static_assert ((char8_t)0xFF != (char8_t)0x7F);
+
+/* Check that char16_t is at least 16 bits wide.  */
+static_assert ((char16_t)0xFFFF != (char16_t)0x7FFF);
+
+/* Check that char32_t is at least 31 bits wide.  */
+static_assert ((char32_t)0x7FFFFFFF != (char32_t)0x3FFFFFFF);
+
+/* Check that _GL_SMALL_WCHAR_T is correctly defined.  */
+#if _GL_SMALL_WCHAR_T
+static_assert (sizeof (wchar_t) < sizeof (char32_t));
+#else
+static_assert (sizeof (wchar_t) == sizeof (char32_t));
+#endif
+
+int
+main (void)
+{
+  return 0;
+}