source: drbl_ui/backup/test_busybox/busybox-1.7.2/testsuite/mv/mv-refuses-mv-dir-to-subdir @ 129

echo file number one > file1
echo file number two > file2
ln -s file2 link1
mkdir dir1
touch --date='Sat Jan 29 21:24:08 PST 2000' dir1/file3
mkdir there
busybox mv file1 file2 link1 dir1 there
test -f there/file1
test -f there/file2
test -f there/dir1/file3
test -L there/link1
test xfile2 = x`readlink there/link1`
test ! -e file1
test ! -e file2
test ! -e link1
test ! -e dir1/file3
set +e
busybox mv there there/dir1
if [ $? != 0 ] ; then
  exit 0;
fi

exit 1;