src/cpl_discord/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_discord'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2021 - 2022 sh-edraft.de'
-__version__ = '2022.10.1'
+__version__ = '2022.10.2'
 
 from collections import namedtuple
 
@@ -55,4 +55,4 @@ def get_discord_collection(services: 'ServiceCollectionABC') -> 'DiscordCollecti
 # build-ignore-end
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='10', micro='1')
+version_info = VersionInfo(major='2022', minor='10', micro='2')

src/cpl_discord/application/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_discord.application'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2021 - 2022 sh-edraft.de'
-__version__ = '2022.10.1'
+__version__ = '2022.10.2'
 
 from collections import namedtuple
 
@@ -24,4 +24,4 @@ from collections import namedtuple
 from .discord_bot_application_abc import DiscordBotApplicationABC
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='10', micro='1')
+version_info = VersionInfo(major='2022', minor='10', micro='2')

src/cpl_discord/command/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_discord.command'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2021 - 2022 sh-edraft.de'
-__version__ = '2022.10.1'
+__version__ = '2022.10.2'
 
 from collections import namedtuple
 
@@ -25,4 +25,4 @@ from .discord_command_abc import DiscordCommandABC
 from .discord_commands_meta import DiscordCogMeta
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='10', micro='1')
+version_info = VersionInfo(major='2022', minor='10', micro='2')

src/cpl_discord/configuration/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_discord.configuration'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2021 - 2022 sh-edraft.de'
-__version__ = '2022.10.1'
+__version__ = '2022.10.2'
 
 from collections import namedtuple
 
@@ -24,4 +24,4 @@ from collections import namedtuple
 from .discord_bot_settings import DiscordBotSettings
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='10', micro='1')
+version_info = VersionInfo(major='2022', minor='10', micro='2')

src/cpl_discord/container/__init__.py

@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+
+"""
+cpl-discord sh-edraft Common Python library Discord
+~~~~~~~~~~~~~~~~~~~
+
+sh-edraft Common Python library link between discord.py and CPL
+
+:copyright: (c) 2021 - 2022 sh-edraft.de
+:license: MIT, see LICENSE for more details.
+
+"""
+
+__title__ = 'cpl_discord.container'
+__author__ = 'Sven Heidemann'
+__license__ = 'MIT'
+__copyright__ = 'Copyright (c) 2021 - 2022 sh-edraft.de'
+__version__ = '2022.10.2'
+
+from collections import namedtuple
+
+
+# imports
+
+VersionInfo = namedtuple('VersionInfo', 'major minor micro')
+version_info = VersionInfo(major='2022', minor='10', micro='2')

src/cpl_discord/container/category_channel.py

@@ -0,0 +1,21 @@
+import discord
+
+from cpl_discord.container.container import Container
+from cpl_discord.container.text_channel import TextChannel
+from cpl_discord.container.voice_channel import VoiceChannel
+from cpl_discord.helper.to_containers_converter import ToContainersConverter
+from cpl_query.extension import List
+
+
+class CategoryChannel(discord.CategoryChannel, Container):
+
+    def __init__(self, _t: discord.CategoryChannel):
+        Container.__init__(self, _t, CategoryChannel)
+
+    @property
+    def text_channels(self) -> List[TextChannel]:
+        return List(TextChannel, ToContainersConverter.convert(self._object.text_channels, TextChannel))
+
+    @property
+    def voice_channels(self) -> List[VoiceChannel]:
+        return List(VoiceChannel, ToContainersConverter.convert(self._object.voice_channels, VoiceChannel))

src/cpl_discord/container/container.py

@@ -0,0 +1,31 @@
+from abc import abstractmethod
+from typing import Callable
+
+
+class Container:
+
+    def __init__(self, _o: object, _t: type):
+        self._object = _o
+        self._type = _t
+
+    def __to_type(_f: Callable, _t: type):
+        def wrapper(*args, **kwargs):
+            result = _f(*args, **kwargs)
+            return _t(result)
+
+        return wrapper
+
+    def __getitem__(self, item):
+        result = self._object[item]
+        if isinstance(result, type(self._guild)):
+            result = self._type(result)
+        return result
+
+    def __getattr__(self, item):
+        result = getattr(self._object, item)
+        if callable(result):
+            result = self.__to_type(result, self._type)
+        return result
+
+    def __repr__(self):
+        return repr(self._object)

src/cpl_discord/container/guild.py

@@ -0,0 +1,42 @@
+import discord
+
+from cpl_discord.container.category_channel import CategoryChannel
+from cpl_discord.container.container import Container
+from cpl_discord.container.member import Member
+from cpl_discord.container.role import Role
+from cpl_discord.container.text_channel import TextChannel
+from cpl_discord.container.voice_channel import VoiceChannel
+from cpl_discord.helper.to_containers_converter import ToContainersConverter
+from cpl_query.extension import List
+
+
+class Guild(discord.Guild, Container):
+
+    def __init__(self, _t: discord.Guild):
+        self._object: discord.Guild = _t
+
+        Container.__init__(self, _t, Guild)
+
+    @property
+    def categories(self) -> List[CategoryChannel]:
+        return List(CategoryChannel, ToContainersConverter.convert(self._object.categories, CategoryChannel))
+
+    @property
+    def members(self) -> List[Member]:
+        return List(Member, ToContainersConverter.convert(self._object.members, Member))
+
+    @property
+    def roles(self) -> List[Role]:
+        return List(Role, ToContainersConverter.convert(self._object.roles, Role))
+
+    @property
+    def text_channels(self) -> List[TextChannel]:
+        return List(TextChannel, ToContainersConverter.convert(self._object.text_channels, TextChannel))
+
+    @property
+    def threads(self) -> List[TextChannel]:
+        return List(TextChannel, ToContainersConverter.convert(self._object.threads, TextChannel))
+
+    @property
+    def voice_channels(self) -> List[VoiceChannel]:
+        return List(VoiceChannel, ToContainersConverter.convert(self._object.voice_channels, VoiceChannel))

src/cpl_discord/container/member.py

@@ -0,0 +1,16 @@
+import discord
+
+from cpl_discord.container.container import Container
+from cpl_discord.helper.to_containers_converter import ToContainersConverter
+from cpl_query.extension.list import List
+
+
+class Member(discord.Member, Container):
+
+    def __init__(self, _t: discord.Member):
+        Container.__init__(self, _t, Member)
+
+    @property
+    def roles(self) -> List['Role']:
+        from cpl_discord.container.role import Role
+        return List(Role, ToContainersConverter.convert(self._object.roles, Role))

src/cpl_discord/container/role.py

@@ -0,0 +1,17 @@
+import discord
+
+from cpl_discord.container.container import Container
+
+from cpl_discord.helper.to_containers_converter import ToContainersConverter
+from cpl_query.extension.list import List
+
+
+class Role(discord.Role, Container):
+
+    def __init__(self, _t: discord.Role):
+        Container.__init__(self, _t, Role)
+
+    @property
+    def members(self) -> List['Member']:
+        from cpl_discord.container.member import Member
+        return List(Member, ToContainersConverter.convert(self._object.members, Member))

src/cpl_discord/container/text_channel.py

@@ -0,0 +1,21 @@
+import discord
+
+from cpl_discord.container.container import Container
+from cpl_discord.container.member import Member
+from cpl_discord.container.threads import Thread
+from cpl_discord.helper.to_containers_converter import ToContainersConverter
+from cpl_query.extension import List
+
+
+class TextChannel(discord.TextChannel, Container):
+
+    def __init__(self, _t: discord.TextChannel):
+        Container.__init__(self, _t, TextChannel)
+
+    @property
+    def members(self) -> List[discord.Member]:
+        return List(discord.Member, ToContainersConverter.convert(self._object.members, Member))
+
+    @property
+    def threads(self) -> List[Thread]:
+        return List(Thread, ToContainersConverter.convert(self._object.threads, Thread))

src/cpl_discord/container/threads.py

@@ -0,0 +1,16 @@
+import discord
+
+from cpl_discord.container.container import Container
+from cpl_discord.container.member import Member
+from cpl_discord.helper.to_containers_converter import ToContainersConverter
+from cpl_query.extension import List
+
+
+class Thread(discord.Thread, Container):
+
+    def __init__(self, _t: discord.Thread):
+        Container.__init__(self, _t, Thread)
+
+    @property
+    def members(self) -> List[Member]:
+        return List(Member, ToContainersConverter.convert(self._object.members, Member))

src/cpl_discord/container/voice_channel.py

@@ -0,0 +1,16 @@
+import discord
+
+from cpl_discord.container.container import Container
+from cpl_discord.container.member import Member
+from cpl_discord.helper.to_containers_converter import ToContainersConverter
+from cpl_query.extension import List
+
+
+class VoiceChannel(discord.VoiceChannel, Container):
+
+    def __init__(self, _t: discord.VoiceChannel):
+        Container.__init__(self, _t, VoiceChannel)
+
+    @property
+    def members(self) -> List[Member]:
+        return List(Member, ToContainersConverter.convert(self._object.members, Member))

src/cpl_discord/cpl-discord.json

@@ -4,7 +4,7 @@
     "Version": {
       "Major": "2022",
       "Minor": "10",
-      "Micro": "1"
+      "Micro": "2"
     },
     "Author": "Sven Heidemann",
     "AuthorEmail": "sven.heidemann@sh-edraft.de",
@@ -16,9 +16,9 @@
     "LicenseName": "MIT",
     "LicenseDescription": "MIT, see LICENSE for more details.",
     "Dependencies": [
-      "cpl-core>=2022.7.0.post2",
+      "cpl-core>=2022.10.1",
       "discord.py==2.0.1",
-      "cpl-query==2022.7.0"
+      "cpl-query==2022.10.2"
     ],
     "DevDependencies": [
       "cpl-cli>=2022.7.0.post2"

src/cpl_discord/events/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_discord.events'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2021 - 2022 sh-edraft.de'
-__version__ = '2022.10.1'
+__version__ = '2022.10.2'
 
 from collections import namedtuple
 
@@ -69,4 +69,4 @@ from .on_voice_state_update_abc import OnVoiceStateUpdateABC
 from .on_webhooks_update_abc import OnWebhooksUpdateABC
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='10', micro='1')
+version_info = VersionInfo(major='2022', minor='10', micro='2')

src/cpl_discord/helper/__init__.py

@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+
+"""
+cpl-discord sh-edraft Common Python library Discord
+~~~~~~~~~~~~~~~~~~~
+
+sh-edraft Common Python library link between discord.py and CPL
+
+:copyright: (c) 2021 - 2022 sh-edraft.de
+:license: MIT, see LICENSE for more details.
+
+"""
+
+__title__ = 'cpl_discord.helper'
+__author__ = 'Sven Heidemann'
+__license__ = 'MIT'
+__copyright__ = 'Copyright (c) 2021 - 2022 sh-edraft.de'
+__version__ = '2022.10.2'
+
+from collections import namedtuple
+
+
+# imports
+
+VersionInfo = namedtuple('VersionInfo', 'major minor micro')
+version_info = VersionInfo(major='2022', minor='10', micro='2')

src/cpl_discord/helper/to_containers_converter.py

@@ -0,0 +1,13 @@
+from typing import Union, Sequence
+
+from cpl_discord.container.container import Container
+
+
+class ToContainersConverter:
+
+    @staticmethod
+    def convert(_l: Union[list[object], Sequence[object]], _t: type) -> list[Container]:
+        values = []
+        for e in _l:
+            values.append(_t(e))
+        return values

src/cpl_discord/service/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_discord.service'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2021 - 2022 sh-edraft.de'
-__version__ = '2022.10.1'
+__version__ = '2022.10.2'
 
 from collections import namedtuple
 
@@ -29,4 +29,4 @@ from .discord_service import DiscordService
 from .discord_service_abc import DiscordServiceABC
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='10', micro='1')
+version_info = VersionInfo(major='2022', minor='10', micro='2')

src/cpl_discord/service/discord_bot_service.py

@@ -5,8 +5,11 @@ from cpl_core.console import Console
 from cpl_core.environment import ApplicationEnvironmentABC
 from cpl_core.logging import LoggerABC, LoggingSettings, LoggingLevelEnum
 from cpl_discord.configuration.discord_bot_settings import DiscordBotSettings
+from cpl_discord.container.guild import Guild
+from cpl_discord.helper.to_containers_converter import ToContainersConverter
 from cpl_discord.service.discord_bot_service_abc import DiscordBotServiceABC
 from cpl_discord.service.discord_service_abc import DiscordServiceABC
+from cpl_query.extension.list import List
 
 
 class DiscordBotService(DiscordBotServiceABC):
@@ -32,6 +35,7 @@ class DiscordBotService(DiscordBotServiceABC):
 
         # setup super
         DiscordBotServiceABC.__init__(self, command_prefix=self._discord_settings.prefix, help_command=None, intents=discord.Intents().all())
+        self._base = super(DiscordBotServiceABC, self)
 
     @staticmethod
     def _is_string_invalid(x):
@@ -77,3 +81,7 @@ class DiscordBotService(DiscordBotServiceABC):
         self._logger.debug(__name__, f'Finished syncing commands')
 
         await self._discord_service.on_ready()
+
+    @property
+    def guilds(self) -> List[Guild]:
+        return List(Guild, ToContainersConverter.convert(self._base.guilds, Guild))

src/cpl_discord/service/discord_bot_service_abc.py

@@ -1,8 +1,10 @@
-from abc import ABC, abstractmethod
+from abc import abstractmethod
 
-import discord
 from discord.ext import commands
 
+from cpl_discord.container.guild import Guild
+from cpl_query.extension.list import List
+
 
 class DiscordBotServiceABC(commands.Bot):
 
@@ -17,3 +19,7 @@ class DiscordBotServiceABC(commands.Bot):
 
     @abstractmethod
     async def on_ready(self): pass
+
+    @property
+    @abstractmethod
+    def guilds(self) -> List[Guild]: pass

src/cpl_query/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_query'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2021 - 2022 sh-edraft.de'
-__version__ = '2022.7.0'
+__version__ = '2022.10.2'
 
 from collections import namedtuple
 
@@ -23,4 +23,4 @@ from collections import namedtuple
 # imports: 
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0')
+version_info = VersionInfo(major='2022', minor='10', micro='2')

src/cpl_query/_query/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_query._query'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2021 - 2022 sh-edraft.de'
-__version__ = '2022.7.0'
+__version__ = '2022.10.2'
 
 from collections import namedtuple
 
@@ -23,4 +23,4 @@ from collections import namedtuple
 # imports:
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0')
+version_info = VersionInfo(major='2022', minor='10', micro='2')

src/cpl_query/_query/select.py

@@ -0,0 +1,19 @@
+from typing import Callable
+
+from cpl_query.extension.iterable_abc import IterableABC
+
+
+def select_query(_list: IterableABC, _f: Callable) -> any:
+    result = IterableABC()
+    result.extend(_f(_o) for _o in _list)
+    return result
+
+
+def select_many_query(_list: IterableABC, _f: Callable) -> any:
+    result = IterableABC()
+    # The line below is pain. I don't understand anything of it...
+    # written on 09.11.2022 by Sven Heidemann
+    elements = [_a for _o in _list for _a in _f(_o)]
+
+    result.extend(elements)
+    return result

src/cpl_query/cpl-query.json

@@ -3,8 +3,8 @@
     "Name": "cpl-query",
     "Version": {
       "Major": "2022",
-      "Minor": "7",
+      "Minor": "10",
-      "Micro": "0"
+      "Micro": "2"
     },
     "Author": "Sven Heidemann",
     "AuthorEmail": "sven.heidemann@sh-edraft.de",

src/cpl_query/extension/__init__.py

@@ -15,7 +15,7 @@ __title__ = 'cpl_query.extension'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2021 - 2022 sh-edraft.de'
-__version__ = '2022.7.0'
+__version__ = '2022.10.2'
 
 from collections import namedtuple
 
@@ -28,4 +28,4 @@ from .ordered_iterable_abc import OrderedIterableABC
 from .ordered_iterable import OrderedIterable
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='7', micro='0')
+version_info = VersionInfo(major='2022', minor='10', micro='2')

src/cpl_query/extension/iterable.py

@@ -14,6 +14,7 @@ from cpl_query._query.for_each import for_each_query
 from cpl_query._query.max_min import max_query, min_query
 from cpl_query._query.order_by import order_by_descending_query, order_by_query
 from cpl_query._query.reverse import reverse_query
+from cpl_query._query.select import select_query, select_many_query
 from cpl_query._query.single import single_or_default_query, single_query
 from cpl_query._query.skip_take import (skip_last_query, skip_query,
                                         take_last_query, take_query)
@@ -94,6 +95,12 @@ class Iterable(IterableABC):
     def single_or_default(self) -> Optional[any]:
         return single_or_default_query(self)
 
+    def select(self, _f: Callable) -> IterableABC:
+        return self.__to_self(select_query(self, _f))
+
+    def select_many(self, _f: Callable) -> IterableABC:
+        return self.__to_self(select_many_query(self, _f))
+
     def skip(self, index: int) -> IterableABC:
         return self.__to_self(skip_query(self, index))
 

src/cpl_query/extension/iterable_abc.py

@@ -158,7 +158,7 @@ class IterableABC(ABC, list):
         """
         pass
 
-    def extend(self, __iterable: Iterable) -> None:
+    def extend(self, __iterable: Iterable) -> 'IterableABC':
         r"""Adds elements of given list to list
 
         Parameter
@@ -169,6 +169,8 @@ class IterableABC(ABC, list):
         for value in __iterable:
             self.append(value)
 
+        return self
+
     @abstractmethod
     def last(self) -> any:
         r"""Returns last element
@@ -290,6 +292,24 @@ class IterableABC(ABC, list):
         """
         pass
 
+    def select(self, _f: Callable) -> 'IterableABC':
+        r"""Formats each element of list to a given format
+
+        Returns
+        -------
+            :class: `cpl_query.extension.iterable_abc.IterableABC`
+        """
+        pass
+
+    def select_many(self, _f: Callable) -> 'IterableABC':
+        r"""Flattens resulting lists to one
+
+        Returns
+        -------
+            :class: `cpl_query.extension.iterable_abc.IterableABC`
+        """
+        pass
+
     @abstractmethod
     def single(self) -> any:
         r"""Returns one single element of list

src/tests/custom/discord/src/modules/hello_world/on_ready_event.py

@@ -1,12 +1,37 @@
+import discord
+
 from cpl_core.logging import LoggerABC
 from cpl_discord.events.on_ready_abc import OnReadyABC
+from cpl_discord.service.discord_bot_service_abc import DiscordBotServiceABC
 
 
 class OnReadyEvent(OnReadyABC):
 
-    def __init__(self, logger: LoggerABC):
+    def __init__(self, logger: LoggerABC, bot: DiscordBotServiceABC):
         OnReadyABC.__init__(self)
         self._logger = logger
+        self._bot = bot
+
+    def _log(self, _t: str, _o: object, _type: type = None):
+        self._logger.debug(__name__, f'{_t} {_o} {_type}')
 
     async def on_ready(self):
         self._logger.info(__name__, 'Hello World')
+        for g in self._bot.guilds:
+            self._log('-Guild', g, type(g))
+            for r in g.roles:
+                self._log('--Role', r, type(r))
+                for rm in r.members:
+                    self._log('---Rolemember', rm, type(rm))
+
+            for m in g.members:
+                self._log('--Member', m, type(m))
+                for mr in m.roles:
+                    self._log('--Memberole', mr, type(mr))
+                    for rm in mr.members:
+                        self._log('---Rolemember', rm, type(rm))
+
+        select = self._bot.guilds.select(lambda guild: (guild.name, guild.id))
+        self._logger.warn(__name__, f'Does cpl.query select work? {select}')
+        select_many = self._bot.guilds.select_many(lambda guild: guild.roles).where(lambda role: role.name == "Tester").first()
+        self._logger.warn(__name__, f'Does cpl.query select_many work? {select_many}')

unittests/unittests_cli/update_test_case.py

@@ -21,7 +21,8 @@ class UpdateTestCase(unittest.TestCase):
         self._old_package_name = 'discord.py'
         self._old_package = f'{self._old_package_name}=={self._old_version}'
 
-        self._new_version = '1.7.3'
+        # todo: better way to do shit required
+        self._new_version = '2.0.1'
         self._new_package_name = 'discord.py'
         self._new_package = f'{self._new_package_name}=={self._new_version}'
 

unittests/unittests_query/query_test_case.py

@@ -161,9 +161,9 @@ class QueryTestCase(unittest.TestCase):
     def test_for_each(self):
         users = []
         self._tests.for_each(lambda user: (
-                users.append(user)
+            users.append(user)
-            )
         )
+                             )
 
         self.assertEqual(len(users), len(self._tests))
 
@@ -239,6 +239,35 @@ class QueryTestCase(unittest.TestCase):
 
         self.assertEqual(l_res, res)
 
+    def test_select(self):
+        range_list = List(int, range(0, 100))
+        selected_range = range_list.select(lambda x: x + 1)
+
+        modulo_range = []
+        for x in range(0, 100):
+            if x % 2 == 0:
+                modulo_range.append(x)
+        self.assertEqual(selected_range.to_list(), list(range(1, 101)))
+        self.assertEqual(range_list.where(lambda x: x % 2 == 0).to_list(), modulo_range)
+
+    def test_select_many(self):
+        range_list = List(int, range(0, 100))
+        selected_range = range_list.select(lambda x: [x, x])
+
+        self.assertEqual(selected_range, [[x, x] for x in range(0, 100)])
+        self.assertEqual(selected_range.select_many(lambda x: x).to_list(), [_x for _l in [2 * [x] for x in range(0, 100)] for _x in _l])
+
+        class TestClass:
+            def __init__(self, i, is_sub=False):
+                self.i = i
+                if is_sub:
+                    return
+                self.elements = [TestClass(x, True) for x in range(0, 10)]
+
+        elements = List(TestClass, [TestClass(i) for i in range(0, 100)])
+        selected_elements = elements.select_many(lambda x: x.elements).select(lambda x: x.i)
+        self.assertEqual(selected_elements.where(lambda x: x == 0).count(), 100)
+
     def test_single(self):
         res = self._tests.where(lambda u: u.address.nr == self._t_user.address.nr)
         s_res = self._tests.where(lambda u: u.address.nr == self._t_user.address.nr).single()