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-rw-r--r--tests/test-ignore-value.c78
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diff --git a/tests/test-ignore-value.c b/tests/test-ignore-value.c
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+/* Test the "ignore-value" module.
+
+ Copyright (C) 2011-2022 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 Eric Blake. */
+
+#include <config.h>
+
+#include "ignore-value.h"
+
+#include <stdio.h>
+
+#include "attribute.h"
+
+struct s { int i; };
+NODISCARD static char doChar (void);
+NODISCARD static int doInt (void);
+NODISCARD static off_t doOff (void);
+NODISCARD static void *doPtr (void);
+NODISCARD static struct s doStruct (void);
+
+static char
+doChar (void)
+{
+ return 0;
+}
+
+static int
+doInt (void)
+{
+ return 0;
+}
+
+static off_t
+doOff (void)
+{
+ return 0;
+}
+
+static void *
+doPtr (void)
+{
+ return NULL;
+}
+
+static struct s
+doStruct (void)
+{
+ static struct s s1;
+ return s1;
+}
+
+int
+main (void)
+{
+ /* If this test can compile with -Werror and the same warnings as
+ the rest of the project, then we are properly silencing warnings
+ about ignored return values. */
+ ignore_value (doChar ());
+ ignore_value (doInt ());
+ ignore_value (doOff ());
+ ignore_value (doPtr ());
+ ignore_value (doStruct ());
+ return 0;
+}