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#!/usr/bin/env python
#
# A library that provides a Python interface to the Telegram Bot API
# Copyright (C) 2015-2025
# 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 pytest
from telegram import User
from telegram._utils.defaultvalue import DefaultValue
from tests.auxil.slots import mro_slots
class TestDefaultValue:
def test_slot_behaviour(self):
inst = DefaultValue(1)
for attr in inst.__slots__:
assert getattr(inst, attr, "err") != "err", f"got extra slot '{attr}'"
assert len(mro_slots(inst)) == len(set(mro_slots(inst))), "duplicate slot"
def test_identity(self):
df_1 = DefaultValue(1)
df_2 = DefaultValue(2)
assert df_1 is not df_2
assert df_1 != df_2
@pytest.mark.parametrize(
("value", "expected"),
[
({}, False),
({1: 2}, True),
(None, False),
(True, True),
(1, True),
(0, False),
(False, False),
([], False),
([1], True),
],
)
def test_truthiness(self, value, expected):
assert bool(DefaultValue(value)) == expected
@pytest.mark.parametrize(
"value", ["string", 1, True, [1, 2, 3], {1: 3}, DefaultValue(1), User(1, "first", False)]
)
def test_string_representations(self, value):
df = DefaultValue(value)
assert str(df) == f"DefaultValue({value})"
assert repr(df) == repr(value)
def test_as_function_argument(self):
default_one = DefaultValue(1)
def foo(arg=default_one):
if arg is default_one:
return 1
return 2
assert foo() == 1
assert foo(None) == 2
assert foo(1) == 2
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