[jira] [Created] (MESOS-8944) Get a callable object from `DROP_DISPATCH` so we can re-dispatch it.

[Chun-Hung Hsiao (JIRA)]

Chun-Hung Hsiao created MESOS-8944:
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             Summary: Get a callable object from `DROP_DISPATCH` so we can 
re-dispatch it.
                 Key: MESOS-8944
                 URL: https://issues.apache.org/jira/browse/MESOS-8944
             Project: Mesos
          Issue Type: Task
          Components: test
            Reporter: Chun-Hung Hsiao


If can get a callable object from {{DROP_DISPATCH}} (and maybe along with the 
target PID), then we could write tests as follows:
{code}
Future<Callable> toDispatch = DROP_DISPATCH(pid, &Some::member_function);

AWAIT_READY(toDispatch);

// Validate some state changes that happen after the member function is enqueued
// but before it is executed.

Future<Nothing> dispatched = dispatch(pid, toDispatch.get());

AWAIT_READY(dispatched);

// Validate some state changes that happen after the member function is 
executed.
{code}

This will make it easier to write tests against actors that we cannot control 
their progress.



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