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#!/usr/bin/env python

#

# A library that provides a Python interface to the Telegram Bot API

# Copyright (C) 2015-2018

# Leandro Toledo de Souza <devs@python-telegram-bot.org>

#

# This program is free software: you can redistribute it and/or modify

# it under the terms of the GNU Lesser Public License as published by

# the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

# GNU Lesser Public License for more details.

#

# You should have received a copy of the GNU Lesser Public License

# along with this program. If not, see [http://www.gnu.org/licenses/].

import os

from time import sleep

import pytest

import telegram.ext.messagequeue as mq

@pytest.mark.skipif(os.getenv('APPVEYOR'), reason="On Appveyor precise timings are not accurate.")

class TestDelayQueue(object):

N = 128

burst_limit = 30

time_limit_ms = 1000

margin_ms = 0

testtimes = []

def call(self):

self.testtimes.append(mq.curtime())

def test_delayqueue_limits(self):

dsp = mq.DelayQueue(burst_limit=self.burst_limit, time_limit_ms=self.time_limit_ms,

autostart=True)

assert dsp.is_alive() is True

for i in range(self.N):

dsp(self.call)

starttime = mq.curtime()

# wait up to 20 sec more than needed

app_endtime = ((self.N * self.burst_limit / (1000 * self.time_limit_ms)) + starttime + 20)

while not dsp._queue.empty() and mq.curtime() < app_endtime:

sleep(1)

assert dsp._queue.empty() is True # check loop exit condition

dsp.stop()

assert dsp.is_alive() is False

assert self.testtimes or self.N == 0 is True

passes, fails = [], []

delta = (self.time_limit_ms - self.margin_ms) / 1000

for start, stop in enumerate(range(self.burst_limit + 1, len(self.testtimes))):

part = self.testtimes[start:stop]

if (part[-1] - part[0]) >= delta:

passes.append(part)

else:

fails.append(part)

assert fails == []