This new unit test verifies that nstrftime produces UTF-8 encoded output
in the UTF-8 environment on native Windows.


2024-08-25  Bruno Haible  <[email protected]>

        nstrftime tests: Test in the UTF-8 environment on native Windows.
        Prompted by <https://debbugs.gnu.org/79296>.
        * tests/test-nstrftime-w32utf8.sh: New file.
        * tests/test-nstrftime-w32utf8.c: New file.
        * modules/nstrftime-tests (Files): Add them. Add windows-utf8.rc,
        windows-utf8.manifest, m4/windows-rc.m4.
        (configure.ac): Invoke gl_WINDOWS_RC.
        (Makeile.am): Arrange to build test-nstrftime-w32utf8 and
        run test-nstrftime-w32utf8.sh.

From 3d4a8bffe51dc3ef4a56a31948b42c4e6494d71b Mon Sep 17 00:00:00 2001
From: Bruno Haible <[email protected]>
Date: Tue, 26 Aug 2025 00:02:22 +0200
Subject: [PATCH] nstrftime tests: Test in the UTF-8 environment on native
 Windows.

Prompted by <https://debbugs.gnu.org/79296>.

* tests/test-nstrftime-w32utf8.sh: New file.
* tests/test-nstrftime-w32utf8.c: New file.
* modules/nstrftime-tests (Files): Add them. Add windows-utf8.rc,
windows-utf8.manifest, m4/windows-rc.m4.
(configure.ac): Invoke gl_WINDOWS_RC.
(Makeile.am): Arrange to build test-nstrftime-w32utf8 and
run test-nstrftime-w32utf8.sh.
---
 ChangeLog                       | 12 ++++++
 modules/nstrftime-tests         | 15 +++++++
 tests/test-nstrftime-w32utf8.c  | 76 +++++++++++++++++++++++++++++++++
 tests/test-nstrftime-w32utf8.sh | 14 ++++++
 4 files changed, 117 insertions(+)
 create mode 100644 tests/test-nstrftime-w32utf8.c
 create mode 100755 tests/test-nstrftime-w32utf8.sh

diff --git a/ChangeLog b/ChangeLog
index 5f36b7a186..33d9975bbe 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,15 @@
+2024-08-25  Bruno Haible  <[email protected]>
+
+	nstrftime tests: Test in the UTF-8 environment on native Windows.
+	Prompted by <https://debbugs.gnu.org/79296>.
+	* tests/test-nstrftime-w32utf8.sh: New file.
+	* tests/test-nstrftime-w32utf8.c: New file.
+	* modules/nstrftime-tests (Files): Add them. Add windows-utf8.rc,
+	windows-utf8.manifest, m4/windows-rc.m4.
+	(configure.ac): Invoke gl_WINDOWS_RC.
+	(Makeile.am): Arrange to build test-nstrftime-w32utf8 and
+	run test-nstrftime-w32utf8.sh.
+
 2024-08-23  Bruno Haible  <[email protected]>
 
 	gen-uni-tables: Update a comment.
diff --git a/modules/nstrftime-tests b/modules/nstrftime-tests
index addd304933..88f4b85074 100644
--- a/modules/nstrftime-tests
+++ b/modules/nstrftime-tests
@@ -7,10 +7,15 @@ tests/test-nstrftime-DE.c
 tests/test-nstrftime-TH.c
 tests/test-nstrftime-IR.c
 tests/test-nstrftime-ET.c
+tests/test-nstrftime-w32utf8.sh
+tests/test-nstrftime-w32utf8.c
+tests/windows-utf8.rc
+tests/windows-utf8.manifest
 tests/macros.h
 m4/locale-fr.m4
 m4/codeset.m4
 m4/musl.m4
+m4/windows-rc.m4
 
 Depends-on:
 atoll
@@ -25,6 +30,7 @@ configure.ac:
 gt_LOCALE_FR
 gt_LOCALE_FR_UTF8
 gl_MUSL_LIBC
+gl_WINDOWS_RC
 
 Makefile.am:
 TESTS += \
@@ -48,3 +54,12 @@ test_nstrftime_DE_LDADD = $(LDADD) $(SETLOCALE_LIB) @INTL_MACOSX_LIBS@ $(LIBTHRE
 test_nstrftime_TH_LDADD = $(LDADD) $(SETLOCALE_LIB) @INTL_MACOSX_LIBS@ $(LIBTHREAD)
 test_nstrftime_IR_LDADD = $(LDADD) $(SETLOCALE_LIB) @INTL_MACOSX_LIBS@ $(LIBTHREAD)
 test_nstrftime_ET_LDADD = $(LDADD) $(SETLOCALE_LIB) @INTL_MACOSX_LIBS@ $(LIBTHREAD)
+
+if OS_IS_NATIVE_WINDOWS
+TESTS += test-nstrftime-w32utf8.sh
+noinst_PROGRAMS += test-nstrftime-w32utf8
+test_nstrftime_w32utf8_LDADD = $(LDADD) test-nstrftime-windows-utf8.res $(SETLOCALE_LIB) @INTL_MACOSX_LIBS@ $(LIBTHREAD)
+test-nstrftime-windows-utf8.res : $(srcdir)/windows-utf8.rc
+	$(WINDRES) -i $(srcdir)/windows-utf8.rc -o test-nstrftime-windows-utf8.res --output-format=coff
+MOSTLYCLEANFILES += test-nstrftime-windows-utf8.res
+endif
diff --git a/tests/test-nstrftime-w32utf8.c b/tests/test-nstrftime-w32utf8.c
new file mode 100644
index 0000000000..433a983fd8
--- /dev/null
+++ b/tests/test-nstrftime-w32utf8.c
@@ -0,0 +1,76 @@
+/* Test of nstrftime on native Windows in the UTF-8 environment.
+   Copyright (C) 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 <[email protected]>, 2025.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "strftime.h"
+
+#include <locale.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+#ifdef _UCRT
+  if (setlocale (LC_ALL, "") == NULL)
+    return 1;
+
+  /* Test that MB_CUR_MAX works as expected in a UTF-8 locale.  */
+  ASSERT (MB_CUR_MAX >= 4);
+
+  time_t t = 1738750272; /* 2025-02-05 10:11:12 */
+  struct tm *tm = gmtime (&t);
+  int ns = 123456789;
+  char buf[100];
+
+  if (strcmp (argv[1], "1") == 0)
+    {
+      /* Test a non-ASCII French month name.  */
+      size_t n = nstrftime (buf, sizeof (buf), "%B", tm, NULL, ns);
+      ASSERT (n > 0);
+      printf ("buf = |%s|\n", buf);
+      fflush (stdout);
+      ASSERT (STREQ (buf, "f\303\251vrier")); /* "f??vrier" */
+
+      return test_exit_status;
+    }
+
+  if (strcmp (argv[1], "2") == 0)
+    {
+      /* Test a non-ASCII Japanese weekday name.  */
+      size_t n = nstrftime (buf, sizeof (buf), "%A", tm, NULL, ns);
+      ASSERT (n > 0);
+      printf ("buf = |%s|\n", buf);
+      fflush (stdout);
+      ASSERT (STREQ (buf, "\346\260\264\346\233\234\346\227\245")); /* "?????????" */
+
+      return test_exit_status;
+    }
+
+  return test_exit_status + 2;
+#else
+  fputs ("Skipping test: not using the UCRT runtime\n", stderr);
+  return 77;
+#endif
+}
diff --git a/tests/test-nstrftime-w32utf8.sh b/tests/test-nstrftime-w32utf8.sh
new file mode 100755
index 0000000000..ddaeaac946
--- /dev/null
+++ b/tests/test-nstrftime-w32utf8.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+# Test the UTF-8 environment on native Windows.
+unset LC_ALL
+unset LC_CTYPE
+unset LC_MESSAGES
+unset LC_NUMERIC
+unset LC_COLLATE
+unset LC_MONETARY
+unset LC_TIME
+unset LANG
+LC_ALL=French_France.65001  ${CHECKER} ./test-nstrftime-w32utf8${EXEEXT} 1 || exit $?
+LC_ALL=Japanese_Japan.65001 ${CHECKER} ./test-nstrftime-w32utf8${EXEEXT} 2 || exit $?
+exit 0
-- 
2.50.1

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