Tools/Scripts/test-webkitpy-python3

#!/usr/bin/env python3
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import sys
sys.dont_write_bytecode = True

import argparse
import os
import sys
import unittest


PYTHON3_COMPATIBLE_DIRECTORIES = [
  'webkitpy.common.system',
  'webkitpy.common.thread',
]


def main():
    parser = argparse.ArgumentParser(description='Run unit tests with Python3. This is intended as a temporary script during the Python2/3 transition')
    parser.add_argument(
        '-v', '--verbose',
        default=False, action='store_true',
        help='Verbose output',
    )
    parser.add_argument(
        '-f', '--stop-on-fail',
        default=False, action='store_true',
        help='Stop on first fail or error',
    )

    if len(PYTHON3_COMPATIBLE_DIRECTORIES) == 1:
        compatible_directories_readable = PYTHON3_COMPATIBLE_DIRECTORIES[0]
    else:
        compatible_directories_readable = '{} and {}'.format(
            ', '.join(PYTHON3_COMPATIBLE_DIRECTORIES[:-1]),
            PYTHON3_COMPATIBLE_DIRECTORIES[-1],
        )
    parser.add_argument(
        'modules_to_test', nargs='*',
        help='Modules to be tested. By default, this is {}'.format(compatible_directories_readable),
        default=PYTHON3_COMPATIBLE_DIRECTORIES,
    )
    options = parser.parse_args()

    root = os.path.dirname(os.path.abspath(__file__))

    suite = unittest.TestSuite()
    for module_name in options.modules_to_test:
        module_suite = unittest.defaultTestLoader.discover(os.path.join(root, module_name.replace('.', '/')), pattern='*test.py', top_level_dir=root)
        for test in (module_suite or []):
            suite.addTest(test)

    if suite.countTestCases() == 0:
        raise RuntimeError('No matching tests found.')

    result = unittest.TextTestRunner(verbosity=int(options.verbose) + 1, failfast=options.stop_on_fail, buffer=not options.verbose).run(suite)
    return len(result.errors)

if __name__ == '__main__':
    sys.exit(main())