1 files changed, 56 insertions, 0 deletions
diff --git a/libio/tst-wfile-ascii.c b/libio/tst-wfile-ascii.c
new file mode 100644
index 0000000000..7514289a7b
--- /dev/null
+++ b/libio/tst-wfile-ascii.c
@@ -0,0 +1,56 @@
+/* Test ASCII gconv module followed by cache initialization.
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdlib.h>
+#include <support/check.h>
+#include <support/support.h>
+#include <support/xstdio.h>
+#include <wchar.h>
+
+static int
+do_test (void)
+{
+  /* The test-in-container framework sets these environment variables.
+     The presence of GCONV_PATH invalidates this test.  */
+  unsetenv ("GCONV_PATH");
+  unsetenv ("LOCPATH");
+
+  /* Create the gconv module cache.  iconvconfig is in /sbin, which is
+     not on PATH.  */
+  {
+    char *iconvconfig = xasprintf ("%s/iconvconfig", support_sbindir_prefix);
+    TEST_COMPARE (system (iconvconfig), 0);
+  }
+
+  /* Use built-in ASCII gconv module, without triggering cache
+     initialization.  */
+  FILE *fp1 = xfopen ("/dev/zero", "r");
+  TEST_COMPARE (fwide (fp1, 1), 1);
+
+  /* Use non-ASCII gconv module and trigger gconv cache
+     initialization.  */
+  FILE *fp2 = xfopen ("/dev/zero", "r,ccs=UTF-8");
+  TEST_COMPARE (fwide (fp2, 0), 1);
+
+  xfclose (fp1);
+  xfclose (fp2);
+
+  return 0;
+}
+
+#include <support/test-driver.c>