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"""Regression testing framework

This module will search for scripts in the same directory named  Each such script should be a test suite that tests a
module through PyUnit.  (As of Python 2.1, PyUnit is included in
the standard library as 'unittest'.)  This script will aggregate all
found test suites into one big test suite and run them all at once.

This program is part of "Dive Into Python", a free Python book for
experienced programmers.  Visit for the
latest version.

__author__ = "Mark Pilgrim ("
__version__ = "$Revision: 1.4 $"
__date__ = "$Date: 2004/05/05 21:57:19 $"
__copyright__ = "Copyright (c) 2001 Mark Pilgrim"
__license__ = "Python"

import sys, os, re, unittest

def regressionTest():
    path = os.path.abspath(os.path.dirname(sys.argv[0]))
    files = os.listdir(path)
    test = re.compile("test\.py$", re.IGNORECASE)
    files = filter(, files)
    filenameToModuleName = lambda f: os.path.splitext(f)[0]
    moduleNames = map(filenameToModuleName, files)
    modules = map(__import__, moduleNames)
    load = unittest.defaultTestLoader.loadTestsFromModule
    return unittest.TestSuite(map(load, modules))

if __name__ == "__main__":