discover-unit-tests.py

from unittest import TestLoader, TextTestRunner

def discover_and_run(verbose=False, names=None):
    # names is None or a list [name, ...]
    # name is test_suite[.class[.name]]
    
    verbosity = 2 if verbose else 1
    loader = TestLoader()

    if names:
        tests = loader.loadTestsFromNames(names)
    else:
        tests = loader.discover('test', '*.py', '..')

    testRunner = TextTestRunner(verbosity=verbosity)
    run_result = testRunner.run(tests)
    
    # Report to shell the exit status
    exit(0 if run_result.wasSuccessful() else 1)