def run_isolated(klass, self, result):
    """Run a test suite or case in a subprocess, using the run method on klass.
    """
    c2pread, c2pwrite = os.pipe()
    # fixme - error -> result
    # now fork
    pid = os.fork()
    if pid <= 0:
        # Child
        # Close parent's pipe ends
        os.close(c2pread)
        # Dup fds for child
        os.dup2(c2pwrite, 1)
        # Close pipe fds.
        os.close(c2pwrite)

        # at this point, sys.stdin is redirected, now we want
        # to filter it to escape ]'s.
        ### XXX: test and write that bit.
        stream = os.fdopen(1, 'wb')
        result = TestProtocolClient(stream)
        klass.run(self, result)
        stream.flush()
        sys.stderr.flush()
        # exit HARD, exit NOW.
        os._exit(0)
    else:
        # Parent
        # Close child pipe ends
        os.close(c2pwrite)
        # hookup a protocol engine
        protocol = TestProtocolServer(result)
        fileobj = os.fdopen(c2pread, 'rb')
        protocol.readFrom(fileobj)
        os.waitpid(pid, 0)
        # TODO return code evaluation.
    return result
dataset/ETHPy150Open byt3bl33d3r/pth-toolkit/lib/python2.7/site-packages/samba/external/subunit/__init__.py/run_isolated/operator `==` -> `<=`