# HG changeset patch
# User Martin Lambers <marlam@marlam.de>
# Date 1232410020 -3600
# Node ID b1edf9425165aa460b18536856d500ea81d235f1
# Parent  c79c0bf513d068e7f2ac0d719b234bbef4dbcfab
Tests for module 'link'.

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2009-01-19  Martin Lambers  <marlam@marlam.de>
+
+	* modules/link-tests: New file.
+	* tests/test-link.sh: New file.
+	* tests/test-link.c: New file.
+
 2009-01-19  Eric Blake  <ebb9@byu.net>
 
 	doc: mention another function added in cygwin 1.7.0
diff --git a/modules/link-tests b/modules/link-tests
new file mode 100644
--- /dev/null
+++ b/modules/link-tests
@@ -0,0 +1,12 @@
+Files:
+tests/test-link.sh
+tests/test-link.c
+
+Depends-on:
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-link.sh
+TESTS_ENVIRONMENT += EXEEXT='@EXEEXT@'
+check_PROGRAMS += test-link
diff --git a/tests/test-link.c b/tests/test-link.c
new file mode 100644
--- /dev/null
+++ b/tests/test-link.c
@@ -0,0 +1,43 @@
+/* Test of link() function.
+   Copyright (C) 2009 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 2 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 <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <unistd.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)
+
+int
+main (int argc, char **argv)
+{
+  ASSERT (argc == 3);
+  ASSERT (link (argv[1], argv[2]) == 0);
+
+  return 0;
+}
diff --git a/tests/test-link.sh b/tests/test-link.sh
new file mode 100755
--- /dev/null
+++ b/tests/test-link.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+
+tmpfiles="test-link-a.txt test-link-b.txt test-link-c.txt"
+trap 'rm -fr $tmpfiles' 1 2 3 15
+
+# Create a file.
+echo "hello" > test-link-a.txt || exit 1
+
+# Use link() to create a new name for it.
+./test-link${EXEEXT} test-link-a.txt test-link-b.txt || exit 1
+cmp test-link-a.txt test-link-b.txt || exit 1
+
+# Modify the contents of the first file.
+echo "world" >> test-link-a.txt || exit 1
+cmp test-link-a.txt test-link-b.txt || exit 1
+
+# Modify the contents of the second file.
+echo "some text" >> test-link-b.txt || exit 1
+cmp test-link-a.txt test-link-b.txt || exit 1
+
+# Delete the first file, then verity the second file still has the same
+# contents.
+cp test-link-a.txt test-link-c.txt || exit 1
+rm test-link-a.txt || exit 1
+cmp test-link-b.txt test-link-c.txt || exit 1
+
+rm -fr $tmpfiles
+exit 0