# -*- test-case-name: twisted.trial._dist.test -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
This package implements the distributed Trial test runner:

- The L{twisted.trial._dist.disttrial} module implements a test runner which
runs in a manager process and can launch additional worker processes in
which to run tests and gather up results from all of them.

- The L{twisted.trial._dist.options} module defines command line options used
to configure the distributed test runner.

- The L{twisted.trial._dist.managercommands} module defines AMP commands
which are sent from worker processes back to the manager process to report
the results of tests.

- The L{twisted.trial._dist.workercommands} module defines AMP commands which
are sent from the manager process to the worker processes to control the
execution of tests there.

- The L{twisted.trial._dist.distreporter} module defines a proxy for
L{twisted.trial.itrial.IReporter} which enforces the typical requirement
that results be passed to a reporter for only one test at a time, allowing
any reporter to be used with despite disttrial's simultaneously running
tests.

- The L{twisted.trial._dist.workerreporter} module implements a
L{twisted.trial.itrial.IReporter} which is used by worker processes and
reports results back to the manager process using AMP commands.

- The L{twisted.trial._dist.workertrial} module is a runnable script which is
the main point for worker processes.

- The L{twisted.trial._dist.worker} process defines the manager's AMP
protocol for accepting results from worker processes and a process protocol
for use running workers as local child processes (as opposed to
distributing them to another host).

@since: 12.3
"""

# File descriptors numbers used to set up pipes with the worker.
_WORKER_AMP_STDIN = 3

_WORKER_AMP_STDOUT = 4