import unittest, sys

def main(modulename):

    '''run the tests found in module, printing nothing when all tests pass'''

    module = sys.modules[modulename]

    suite = unittest.defaultTestLoader.loadTestsFromModule(module)

    results = unittest.TestResult()

    suite.run(results)

    if results.errors or results.failures:

        for tc, exc in results.errors:

            print 'ERROR:', tc

            print

            sys.stdout.write(exc)

        for tc, exc in results.failures:

            print 'FAIL:', tc

            print

            sys.stdout.write(exc)

        sys.exit(1)