python-telegram-bot/tests/test_promise.py
Harshil 92ff6a8e2b
Add __slots__ (#2345)
Co-authored-by: deepsource-autofix[bot] <62050782+deepsource-autofix[bot]@users.noreply.github.com>
Co-authored-by: Hinrich Mahler <hinrich.mahler@freenet.de>
2021-05-29 16:18:16 +02:00

138 lines
4.3 KiB
Python

#!/usr/bin/env python
#
# A library that provides a Python interface to the Telegram Bot API
# Copyright (C) 2015-2021
# 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 logging
import pytest
from telegram import TelegramError
from telegram.ext.utils.promise import Promise
class TestPromise:
"""
Here we just test the things that are not covered by the other tests anyway
"""
test_flag = False
def test_slot_behaviour(self, recwarn, mro_slots):
inst = Promise(self.test_call, [], {})
for attr in inst.__slots__:
assert getattr(inst, attr, 'err') != 'err', f"got extra slot '{attr}'"
assert not inst.__dict__, f"got missing slot(s): {inst.__dict__}"
assert len(mro_slots(inst)) == len(set(mro_slots(inst))), "duplicate slot"
inst.custom, inst.args = 'should give warning', []
assert len(recwarn) == 1 and 'custom' in str(recwarn[0].message), recwarn.list
@pytest.fixture(autouse=True)
def reset(self):
self.test_flag = False
def test_call(self):
def callback():
self.test_flag = True
promise = Promise(callback, [], {})
promise()
assert promise.done
assert self.test_flag
def test_run_with_exception(self):
def callback():
raise TelegramError('Error')
promise = Promise(callback, [], {})
promise.run()
assert promise.done
assert not self.test_flag
assert isinstance(promise.exception, TelegramError)
def test_wait_for_exception(self):
def callback():
raise TelegramError('Error')
promise = Promise(callback, [], {})
promise.run()
with pytest.raises(TelegramError, match='Error'):
promise.result()
def test_done_cb_after_run(self):
def callback():
return "done!"
def done_callback(_):
self.test_flag = True
promise = Promise(callback, [], {})
promise.run()
promise.add_done_callback(done_callback)
assert promise.result() == "done!"
assert self.test_flag is True
def test_done_cb_after_run_excp(self):
def callback():
return "done!"
def done_callback(_):
raise Exception("Error!")
promise = Promise(callback, [], {})
promise.run()
assert promise.result() == "done!"
with pytest.raises(Exception) as err:
promise.add_done_callback(done_callback)
assert str(err) == "Error!"
def test_done_cb_before_run(self):
def callback():
return "done!"
def done_callback(_):
self.test_flag = True
promise = Promise(callback, [], {})
promise.add_done_callback(done_callback)
assert promise.result(0) != "done!"
assert self.test_flag is False
promise.run()
assert promise.result() == "done!"
assert self.test_flag is True
def test_done_cb_before_run_excp(self, caplog):
def callback():
return "done!"
def done_callback(_):
raise Exception("Error!")
promise = Promise(callback, [], {})
promise.add_done_callback(done_callback)
assert promise.result(0) != "done!"
caplog.clear()
with caplog.at_level(logging.WARNING):
promise.run()
assert len(caplog.records) == 2
assert caplog.records[0].message == (
"`done_callback` of a Promise raised the following exception."
" The exception won't be handled by error handlers."
)
assert caplog.records[1].message.startswith("Full traceback:")
assert promise.result() == "done!"