'Calling ``run`` spawns a process running the given command.'

def test_spawns_process(self):

    reactor = ProcessCoreReactor()
    run(reactor, ['command', 'and', 'args'])
    [process] = reactor.processes
    self.assertEqual([process.executable, process.args, type(process.processProtocol)], ['command', ['command', 'and', 'args'], CommandProtocol])
