import sys

import pexpect
import pytest


@pytest.fixture
def proc_factory():
    procs = []

    def call_proc(cmd, args, logfile=None, encoding=None):
        if logfile is None:
            logfile = sys.stdout
        if encoding is None:
            encoding = "utf-8"
        proc = pexpect.spawn(cmd, args, logfile=logfile, encoding=encoding)
        procs.append(proc)
        return proc

    try:
        yield call_proc
    finally:
        for proc in procs:
            proc.close()