1 files changed, 58 insertions, 0 deletions
diff --git a/tests/test-sleep.c b/tests/test-sleep.c
new file mode 100644
index 00000000..e3ab9e62
--- /dev/null
+++ b/tests/test-sleep.c
@@ -0,0 +1,58 @@
+/* Test of sleep() function.
+   Copyright (C) 2007-2017 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>, 2007.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (sleep, unsigned int, (unsigned int));
+
+#include <signal.h>
+
+#include "macros.h"
+
+#if HAVE_DECL_ALARM
+static void
+handle_alarm (int sig)
+{
+  if (sig != SIGALRM)
+    _exit (1);
+}
+#endif
+
+int
+main (void)
+{
+  ASSERT (sleep (1) <= 1);
+
+  ASSERT (sleep (0) == 0);
+
+#if HAVE_DECL_ALARM
+  {
+    const unsigned int pentecost = 50 * 24 * 60 * 60; /* 50 days.  */
+    unsigned int remaining;
+    signal (SIGALRM, handle_alarm);
+    alarm (1);
+    remaining = sleep (pentecost);
+    ASSERT (pentecost - 10 < remaining && remaining <= pentecost);
+  }
+#endif
+
+  return 0;
+}