diff options
Diffstat (limited to 'tests/helpers.py')
| -rw-r--r-- | tests/helpers.py | 425 |
1 files changed, 410 insertions, 15 deletions
diff --git a/tests/helpers.py b/tests/helpers.py index 25059fa3a..892d42e6c 100644 --- a/tests/helpers.py +++ b/tests/helpers.py @@ -1,27 +1,18 @@ +from __future__ import annotations + import asyncio import functools -from unittest.mock import MagicMock - - -__all__ = ('AsyncMock', 'async_test') - +import unittest.mock +from typing import Iterable, Optional -# TODO: Remove me on 3.8 -# Allows you to mock a coroutine. Since the default `__call__` of `MagicMock` -# is not a coroutine, trying to mock a coroutine with it will result in errors -# as the default `__call__` is not awaitable. Use this class for monkeypatching -# coroutines instead. -class AsyncMock(MagicMock): - async def __call__(self, *args, **kwargs): - return super(AsyncMock, self).__call__(*args, **kwargs) +import discord +from discord.ext.commands import Bot, Context def async_test(wrapped): """ Run a test case via asyncio. - Example: - >>> @async_test ... async def lemon_wins(): ... assert True @@ -31,3 +22,407 @@ def async_test(wrapped): def wrapper(*args, **kwargs): return asyncio.run(wrapped(*args, **kwargs)) return wrapper + + +# TODO: Remove me in Python 3.8 +class AsyncMock(unittest.mock.MagicMock): + """ + A MagicMock subclass to mock async callables. + + Python 3.8 will introduce an AsyncMock class in the standard library that will have some more + features; this stand-in only overwrites the `__call__` method to an async version. + """ + + async def __call__(self, *args, **kwargs): + return super(AsyncMock, self).__call__(*args, **kwargs) + + +class HashableMixin(discord.mixins.EqualityComparable): + """ + Mixin that provides similar hashing and equality functionality as discord.py's `Hashable` mixin. + + Note: discord.py`s `Hashable` mixin bit-shifts `self.id` (`>> 22`); to prevent hash-collisions + for the relative small `id` integers we generally use in tests, this bit-shift is omitted. + """ + + def __hash__(self): + return self.id + + +class ColourMixin: + """A mixin for Mocks that provides the aliasing of color->colour like discord.py does.""" + + @property + def color(self) -> discord.Colour: + return self.colour + + @color.setter + def color(self, color: discord.Colour) -> None: + self.colour = color + + +class AttributeMock: + """Ensures attributes of our mock types will be instantiated with the correct mock type.""" + + def __new__(cls, *args, **kwargs): + """Stops the regular parent class from propagating to newly mocked attributes.""" + if 'parent' in kwargs: + return cls.attribute_mocktype(*args, **kwargs) + + return super().__new__(cls) + + +# Create a guild instance to get a realistic Mock of `discord.Guild` +guild_data = { + 'id': 1, + 'name': 'guild', + 'region': 'Europe', + 'verification_level': 2, + 'default_notications': 1, + 'afk_timeout': 100, + 'icon': "icon.png", + 'banner': 'banner.png', + 'mfa_level': 1, + 'splash': 'splash.png', + 'system_channel_id': 464033278631084042, + 'description': 'mocking is fun', + 'max_presences': 10_000, + 'max_members': 100_000, + 'preferred_locale': 'UTC', + 'owner_id': 1, + 'afk_channel_id': 464033278631084042, +} +guild_instance = discord.Guild(data=guild_data, state=unittest.mock.MagicMock()) + + +class MockGuild(AttributeMock, unittest.mock.Mock, HashableMixin): + """ + A `Mock` subclass to mock `discord.Guild` objects. + + A MockGuild instance will follow the specifications of a `discord.Guild` instance. This means + that if the code you're testing tries to access an attribute or method that normally does not + exist for a `discord.Guild` object this will raise an `AttributeError`. This is to make sure our + tests fail if the code we're testing uses a `discord.Guild` object in the wrong way. + + One restriction of that is that if the code tries to access an attribute that normally does not + exist for `discord.Guild` instance but was added dynamically, this will raise an exception with + the mocked object. To get around that, you can set the non-standard attribute explicitly for the + instance of `MockGuild`: + + >>> guild = MockGuild() + >>> guild.attribute_that_normally_does_not_exist = unittest.mock.MagicMock() + + In addition to attribute simulation, mocked guild object will pass an `isinstance` check against + `discord.Guild`: + + >>> guild = MockGuild() + >>> isinstance(guild, discord.Guild) + True + + For more info, see the `Mocking` section in `tests/README.md`. + """ + + attribute_mocktype = unittest.mock.MagicMock + + def __init__( + self, + guild_id: int = 1, + roles: Optional[Iterable[MockRole]] = None, + members: Optional[Iterable[MockMember]] = None, + **kwargs, + ) -> None: + super().__init__(spec=guild_instance, **kwargs) + + self.id = guild_id + + self.roles = [MockRole("@everyone", 1)] + if roles: + self.roles.extend(roles) + + self.members = [] + if members: + self.members.extend(members) + + # `discord.Guild` coroutines + self.create_category_channel = AsyncMock() + self.ban = AsyncMock() + self.bans = AsyncMock() + self.create_category = AsyncMock() + self.create_custom_emoji = AsyncMock() + self.create_role = AsyncMock() + self.create_text_channel = AsyncMock() + self.create_voice_channel = AsyncMock() + self.delete = AsyncMock() + self.edit = AsyncMock() + self.estimate_pruned_members = AsyncMock() + self.fetch_ban = AsyncMock() + self.fetch_channels = AsyncMock() + self.fetch_emoji = AsyncMock() + self.fetch_emojis = AsyncMock() + self.fetch_member = AsyncMock() + self.invites = AsyncMock() + self.kick = AsyncMock() + self.leave = AsyncMock() + self.prune_members = AsyncMock() + self.unban = AsyncMock() + self.vanity_invite = AsyncMock() + self.webhooks = AsyncMock() + self.widget = AsyncMock() + + +# Create a Role instance to get a realistic Mock of `discord.Role` +role_data = {'name': 'role', 'id': 1} +role_instance = discord.Role(guild=guild_instance, state=unittest.mock.MagicMock(), data=role_data) + + +class MockRole(AttributeMock, unittest.mock.Mock, ColourMixin, HashableMixin): + """ + A Mock subclass to mock `discord.Role` objects. + + Instances of this class will follow the specifications of `discord.Role` instances. For more + information, see the `MockGuild` docstring. + """ + + attribute_mocktype = unittest.mock.MagicMock + + def __init__(self, name: str = "role", role_id: int = 1, position: int = 1, **kwargs) -> None: + super().__init__(spec=role_instance, **kwargs) + + self.name = name + self.id = role_id + self.position = position + self.mention = f'&{self.name}' + + # 'discord.Role' coroutines + self.delete = AsyncMock() + self.edit = AsyncMock() + + def __lt__(self, other): + """Simplified position-based comparisons similar to those of `discord.Role`.""" + return self.position < other.position + + +# Create a Member instance to get a realistic Mock of `discord.Member` +member_data = {'user': 'lemon', 'roles': [1]} +state_mock = unittest.mock.MagicMock() +member_instance = discord.Member(data=member_data, guild=guild_instance, state=state_mock) + + +class MockMember(AttributeMock, unittest.mock.Mock, ColourMixin, HashableMixin): + """ + A Mock subclass to mock Member objects. + + Instances of this class will follow the specifications of `discord.Member` instances. For more + information, see the `MockGuild` docstring. + """ + + attribute_mocktype = unittest.mock.MagicMock + + def __init__( + self, + name: str = "member", + user_id: int = 1, + roles: Optional[Iterable[MockRole]] = None, + **kwargs, + ) -> None: + super().__init__(spec=member_instance, **kwargs) + + self.name = name + self.id = user_id + + self.roles = [MockRole("@everyone", 1)] + if roles: + self.roles.extend(roles) + + self.mention = f"@{self.name}" + + # `discord.Member` coroutines + self.add_roles = AsyncMock() + self.ban = AsyncMock() + self.edit = AsyncMock() + self.fetch_message = AsyncMock() + self.kick = AsyncMock() + self.move_to = AsyncMock() + self.pins = AsyncMock() + self.remove_roles = AsyncMock() + self.send = AsyncMock() + self.trigger_typing = AsyncMock() + self.unban = AsyncMock() + + +# Create a Bot instance to get a realistic MagicMock of `discord.ext.commands.Bot` +bot_instance = Bot(command_prefix=unittest.mock.MagicMock()) + + +class MockBot(AttributeMock, unittest.mock.MagicMock): + """ + A MagicMock subclass to mock Bot objects. + + Instances of this class will follow the specifications of `discord.ext.commands.Bot` instances. + For more information, see the `MockGuild` docstring. + """ + + attribute_mocktype = unittest.mock.MagicMock + + def __init__(self, **kwargs) -> None: + super().__init__(spec=bot_instance, **kwargs) + + # `discord.ext.commands.Bot` coroutines + self._before_invoke = AsyncMock() + self._after_invoke = AsyncMock() + self.application_info = AsyncMock() + self.change_presence = AsyncMock() + self.connect = AsyncMock() + self.close = AsyncMock() + self.create_guild = AsyncMock() + self.delete_invite = AsyncMock() + self.fetch_channel = AsyncMock() + self.fetch_guild = AsyncMock() + self.fetch_guilds = AsyncMock() + self.fetch_invite = AsyncMock() + self.fetch_user = AsyncMock() + self.fetch_user_profile = AsyncMock() + self.fetch_webhook = AsyncMock() + self.fetch_widget = AsyncMock() + self.get_context = AsyncMock() + self.get_prefix = AsyncMock() + self.invoke = AsyncMock() + self.is_owner = AsyncMock() + self.login = AsyncMock() + self.logout = AsyncMock() + self.on_command_error = AsyncMock() + self.on_error = AsyncMock() + self.process_commands = AsyncMock() + self.request_offline_members = AsyncMock() + self.start = AsyncMock() + self.wait_until_ready = AsyncMock() + self.wait_for = AsyncMock() + + +# Create a Context instance to get a realistic MagicMock of `discord.ext.commands.Context` +context_instance = Context(message=unittest.mock.MagicMock(), prefix=unittest.mock.MagicMock()) + + +class MockContext(AttributeMock, unittest.mock.MagicMock): + """ + A MagicMock subclass to mock Context objects. + + Instances of this class will follow the specifications of `discord.ext.commands.Context` + instances. For more information, see the `MockGuild` docstring. + """ + + attribute_mocktype = unittest.mock.MagicMock + + def __init__(self, **kwargs) -> None: + super().__init__(spec=context_instance, **kwargs) + self.bot = MockBot() + self.guild = MockGuild() + self.author = MockMember() + self.command = unittest.mock.MagicMock() + + # `discord.ext.commands.Context` coroutines + self.fetch_message = AsyncMock() + self.invoke = AsyncMock() + self.pins = AsyncMock() + self.reinvoke = AsyncMock() + self.send = AsyncMock() + self.send_help = AsyncMock() + self.trigger_typing = AsyncMock() + + +# Create a TextChannel instance to get a realistic MagicMock of `discord.TextChannel` +channel_data = { + 'id': 1, + 'type': 'TextChannel', + 'name': 'channel', + 'parent_id': 1234567890, + 'topic': 'topic', + 'position': 1, + 'nsfw': False, + 'last_message_id': 1, +} +state = unittest.mock.MagicMock() +guild = unittest.mock.MagicMock() +channel_instance = discord.TextChannel(state=state, guild=guild, data=channel_data) + + +class MockTextChannel(AttributeMock, unittest.mock.Mock, HashableMixin): + """ + A MagicMock subclass to mock TextChannel objects. + + Instances of this class will follow the specifications of `discord.TextChannel` instances. For + more information, see the `MockGuild` docstring. + """ + + attribute_mocktype = unittest.mock.MagicMock + + def __init__(self, name: str = 'channel', channel_id: int = 1, **kwargs) -> None: + super().__init__(spec=channel_instance, **kwargs) + self.id = channel_id + self.name = name + self.guild = MockGuild() + self.mention = f"#{self.name}" + + # `discord.TextChannel` coroutines + self.clone = AsyncMock() + self.create_invite = AsyncMock() + self.create_webhook = AsyncMock() + self.delete = AsyncMock() + self.delete_messages = AsyncMock() + self.edit = AsyncMock() + self.fetch_message = AsyncMock() + self.invites = AsyncMock() + self.pins = AsyncMock() + self.purge = AsyncMock() + self.send = AsyncMock() + self.set_permissions = AsyncMock() + self.trigger_typing = AsyncMock() + self.webhooks = AsyncMock() + + +# Create a Message instance to get a realistic MagicMock of `discord.Message` +message_data = { + 'id': 1, + 'webhook_id': 431341013479718912, + 'attachments': [], + 'embeds': [], + 'application': 'Python Discord', + 'activity': 'mocking', + 'channel': unittest.mock.MagicMock(), + 'edited_timestamp': '2019-10-14T15:33:48+00:00', + 'type': 'message', + 'pinned': False, + 'mention_everyone': False, + 'tts': None, + 'content': 'content', + 'nonce': None, +} +state = unittest.mock.MagicMock() +channel = unittest.mock.MagicMock() +message_instance = discord.Message(state=state, channel=channel, data=message_data) + + +class MockMessage(AttributeMock, unittest.mock.MagicMock): + """ + A MagicMock subclass to mock Message objects. + + Instances of this class will follow the specifications of `discord.Message` instances. For more + information, see the `MockGuild` docstring. + """ + + attribute_mocktype = unittest.mock.MagicMock + + def __init__(self, **kwargs) -> None: + super().__init__(spec=message_instance, **kwargs) + self.author = MockMember() + self.channel = MockTextChannel() + + # `discord.Message` coroutines + self.ack = AsyncMock() + self.add_reaction = AsyncMock() + self.clear_reactions = AsyncMock() + self.delete = AsyncMock() + self.edit = AsyncMock() + self.pin = AsyncMock() + self.remove_reaction = AsyncMock() + self.unpin = AsyncMock() |