openat: work around AIX 7.1 fstatat issue

[gnulib.git] / tests / test-strerror.c

diff --git a/tests/test-strerror.c b/tests/test-strerror.c
index 986f75a..3ffb12e 100644 (file)
--- a/tests/test-strerror.c
+++ b/tests/test-strerror.c
@@ -1,5 +1,5 @@
 /* Test of strerror() function.
-   Copyright (C) 2007-2009 Free Software Foundation, Inc.
+   Copyright (C) 2007-2011 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
@@ -25,45 +25,52 @@
 SIGNATURE_CHECK (strerror, char *, (int));
 
 #include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#define ASSERT(expr) \
-  do                                                                         \
-    {                                                                        \
-      if (!(expr))                                                           \
-        {                                                                    \
-          fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
-          fflush (stderr);                                                   \
-          abort ();                                                          \
-        }                                                                    \
-    }                                                                        \
-  while (0)
+
+#include "macros.h"
 
 int
 main (void)
 {
   char *str;
 
+  errno = 0;
   str = strerror (EACCES);
   ASSERT (str);
   ASSERT (*str);
+  ASSERT (errno == 0);
 
+  errno = 0;
   str = strerror (ETIMEDOUT);
   ASSERT (str);
   ASSERT (*str);
+  ASSERT (errno == 0);
 
+  errno = 0;
   str = strerror (EOVERFLOW);
   ASSERT (str);
   ASSERT (*str);
+  ASSERT (errno == 0);
 
+  /* POSIX requires strerror (0) to succeed.  Reject use of "Unknown
+     error", but allow "Success", "No error", or even Solaris' "Error
+     0" which are distinct patterns from true out-of-range strings.
+     http://austingroupbugs.net/view.php?id=382  */
+  errno = 0;
   str = strerror (0);
   ASSERT (str);
   ASSERT (*str);
-
+  ASSERT (errno == 0);
+  ASSERT (strstr (str, "nknown") == NULL);
+  ASSERT (strstr (str, "ndefined") == NULL);
+
+  /* POSIX requires strerror to produce a non-NULL result for all
+     inputs; as an extension, we also guarantee a non-empty reseult.
+     Reporting EINVAL is optional.  */
+  errno = 0;
   str = strerror (-3);
   ASSERT (str);
   ASSERT (*str);
+  ASSERT (errno == 0 || errno == EINVAL);
 
   return 0;
 }