source: drbl_ui/backup/test_busybox/busybox-1.7.2/testsuite/README @ 144

Update: doesn't work as described. Try "make check" from parent dir...
* * *

To run the test suite, change to this directory and run "./runtest".  It will
run all of the test cases, and list those with unexpected outcomes.  Adding the
-v option will cause it to show expected outcomes as well.  To only run the test
cases for particular applets, specify them as parameters to runtest.

The test cases for an applet reside in the subdirectory of the applet name.  The
name of the test case should be the assertion that is tested.  The test case
should be a shell fragment that returns successfully if the test case passes,
and unsuccessfully otherwise.

If the test case relies on a certain feature, it should include the string
"FEATURE: " followed by the name of the feature in a comment.  If it is always
expected to fail, it should include the string "XFAIL" in a comment.

For the entire testsuite, the copyright is as follows:

Copyright (C) 2001, 2002  Matt Kraai

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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.