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How to use partition_tests method in stestr

Best Python code snippet using stestr_python

concurrencytest.py

Source:concurrencytest.py

...40        :return: An iterable of TestCase-like objects which can each have41        run(result) called on them to feed tests to result.42        """43        result = []44        test_blocks = partition_tests(suite, concurrency_num)45        # Clear the tests from the original suite so it doesn't keep them alive46        suite._tests[:] = []47        for process_tests in test_blocks:48            process_suite = unittest.TestSuite(process_tests)49            # Also clear each split list so new suite has only reference50            process_tests[:] = []51            c2pread, c2pwrite = os.pipe()52            pid = os.fork()53            if pid == 0:54                try:55                    stream = os.fdopen(c2pwrite, 'wb')56                    os.close(c2pread)57                    # Leave stderr and stdout open so we can see test noise58                    # Close stdin so that the child goes away if it decides to59                    # read from stdin (otherwise its a roulette to see what60                    # child actually gets keystrokes for pdb etc).61                    sys.stdin.close()62                    subunit_result = AutoTimingTestResultDecorator(63                        TestProtocolClient(stream)64                    )65                    process_suite.run(subunit_result)66                except:67                    # Try and report traceback on stream, but exit with error68                    # even if stream couldn't be created or something else69                    # goes wrong.  The traceback is formatted to a string and70                    # written in one go to avoid interleaving lines from71                    # multiple failing children.72                    try:73                        stream.write(traceback.format_exc())74                    finally:75                        os._exit(1)76                os._exit(0)77            else:78                os.close(c2pwrite)79                stream = os.fdopen(c2pread, 'rb')80                test = ProtocolTestCase(stream)81                result.append(test)82        return result83    return do_fork84def partition_tests(suite, count):85    """Partition suite into count lists of tests."""86    # This just assigns tests in a round-robin fashion.  On one hand this87    # splits up blocks of related tests that might run faster if they shared88    # resources, but on the other it avoids assigning blocks of slow tests to89    # just one partition.  So the slowest partition shouldn't be much slower90    # than the fastest.91    partitions = [list() for _ in range(count)]92    tests = iterate_tests(suite)93    for partition, test in zip(cycle(partitions), tests):94        partition.append(test)95    return partitions96if __name__ == '__main__':97    import time98    class SampleTestCase(unittest.TestCase):...

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