Bump version to v12.2.0

fixes #1541

.pre-commit-config.yaml

@@ -10,9 +10,6 @@ repos:
     sha: 0b70e285e369bcb24b57b74929490ea7be9c4b19
     hooks:
     -   id: flake8
-        exclude: ^(setup.py|docs/source/conf.py)$
-        args:
-        - --ignore=W605,W503
 -   repo: git://github.com/pre-commit/mirrors-pylint
     sha: 9d8dcbc2b86c796275680f239c1e90dcd50bd398
     hooks:

.travis.yml

@@ -14,10 +14,11 @@ matrix:
       dist: xenial
     - python: pypy3.5-5.10.1
       dist: xenial
+    - python: 3.8-dev
+      dist: xenial
   allow_failures:
     - python: pypy2.7-5.10.0
     - python: pypy3.5-5.10.1
-    - env: TEST_OFFICIAL=true
 
 dist: trusty
 sudo: false
@@ -36,17 +37,18 @@ before_cache:
   - rm -f $HOME/.pre-commit/pre-commit.log
 
 install:
+  # fix TypeError from old version of this
   - pip install -U codecov pytest-cov
   - echo $TRAVIS_PYTHON_VERSION
-  - if [[ $TRAVIS_PYTHON_VERSION == '3.7'* ]]; then pip install -U git+https://github.com/yaml/pyyaml.git; fi
+  - if [[ $TRAVIS_PYTHON_VERSION == '3.7'* ]]; then pip install -U git+https://github.com/yaml/pyyaml.git; else true; fi
   - pip install -U -r requirements.txt
   - pip install -U -r requirements-dev.txt
-  - if [[ $TRAVIS_PYTHON_VERSION != 'pypy'* ]]; then pip install ujson; fi
+  - if [[ $TRAVIS_PYTHON_VERSION != 'pypy'* ]]; then pip install ujson; else true; fi
 
 script:
-  - if [[ $TEST_OFFICIAL != 'true' ]]; then pytest -v -m nocoverage; fi
-  - if [[ $TEST_OFFICIAL != 'true' ]]; then pytest -v -m "not nocoverage" --cov; fi
-  - if [[ $TEST_OFFICIAL == 'true' ]]; then pytest -v tests/test_official.py; fi
+  - if [[ $TEST_OFFICIAL != 'true' ]]; then pytest -v -m nocoverage; else true; fi
+  - if [[ $TEST_OFFICIAL != 'true' ]]; then pytest -v -m "not nocoverage" --cov; else true; fi
+  - if [[ $TEST_OFFICIAL == 'true' ]]; then pytest -v tests/test_official.py; else true; fi
 
 after_success:
   - coverage combine

AUTHORS.rst

@@ -72,6 +72,7 @@ The following wonderful people contributed directly or indirectly to this projec
 - `Shelomentsev D <https://github.com/shelomentsevd>`_
 - `Simon Schürrle <https://github.com/SitiSchu>`_
 - `sooyhwang <https://github.com/sooyhwang>`_
+- `syntx <https://github.com/syntx>`_
 - `thodnev <https://github.com/thodnev>`_
 - `Trainer Jono <https://github.com/Tr-Jono>`_
 - `Valentijn <https://github.com/Faalentijn>`_

CHANGES.rst

@@ -2,6 +2,43 @@
 Changelog
 =========
 
+Version 12.2.0
+==============
+
+**New features:**
+
+- Nested ConversationHandlers (`#1512`_).
+
+**Minor changes, CI improvments or bug fixes:**
+
+- Fix CI failures due to non-backward compat attrs depndency (`#1540`_).
+- travis.yaml: TEST_OFFICIAL removed from allowed_failures.
+- Fix typos in examples (`#1537`_).
+- Fix Bot.to_dict to use proper first_name (`#1525`_).
+- Refactor ``test_commandhandler.py`` (`#1408`_).
+- Add Python 3.8 (RC version) to Travis testing matrix (`#1543`_).
+- test_bot.py: Add to_dict test (`#1544`_).
+- Flake config moved into setup.cfg (`#1546`_).
+
+.. _`#1512`: https://github.com/python-telegram-bot/python-telegram-bot/pull/1512
+.. _`#1540`: https://github.com/python-telegram-bot/python-telegram-bot/pull/1540
+.. _`#1537`: https://github.com/python-telegram-bot/python-telegram-bot/pull/1537
+.. _`#1525`: https://github.com/python-telegram-bot/python-telegram-bot/pull/1525
+.. _`#1408`: https://github.com/python-telegram-bot/python-telegram-bot/pull/1408
+.. _`#1543`: https://github.com/python-telegram-bot/python-telegram-bot/pull/1543
+.. _`#1544`: https://github.com/python-telegram-bot/python-telegram-bot/pull/1544
+.. _`#1546`: https://github.com/python-telegram-bot/python-telegram-bot/pull/1546
+
+Version 12.1.1
+==============
+*Released 2019-09-18*
+
+**Hot fix release**
+
+Fixed regression in the vendored urllib3 (`#1517`_).
+
+.. _`#1517`: https://github.com/python-telegram-bot/python-telegram-bot/pull/1517
+
 Version 12.1.0
 ================
 *Released 2019-09-13*

appveyor.yml

@@ -2,7 +2,7 @@ environment:
 
   matrix:
     # For Python versions available on Appveyor, see
-    # http://www.appveyor.com/docs/installed-software#python
+    # https://www.appveyor.com/docs/windows-images-software/#python
     # The list here is complete (excluding Python 2.6, which
     # isn't covered by this document) at the time of writing.
 
@@ -10,6 +10,7 @@ environment:
     - PYTHON: "C:\\Python35"
     - PYTHON: "C:\\Python36"
     - PYTHON: "C:\\Python37"
+    # - PYTHON: "C:\\Python38"
 
 branches:
   only:
@@ -26,6 +27,8 @@ install:
   # Check that we have the expected version and architecture for Python
   - "python --version"
   # We need wheel installed to build wheels
+  # fix TypeError from an old version of this
+  - "pip install attrs==17.4.0"
   - "pip install -U codecov pytest-cov"
   - "pip install -r requirements.txt"
   - "pip install -r requirements-dev.txt"
@@ -33,6 +36,7 @@ install:
 build: off
 
 test_script:
+  - "pytest --version"
   - "pytest -m \"not nocoverage\" --cov --cov-report xml:coverage.xml"
 
 after_test:

docs/source/conf.py

@@ -60,7 +60,7 @@ author = u'Leandro Toledo'
 # The short X.Y version.
 version = '12.1'  # telegram.__version__[:3]
 # The full version, including alpha/beta/rc tags.
-release = '12.1.0'  # telegram.__version__
+release = '12.2.0'  # telegram.__version__
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.

examples/README.md

@@ -16,6 +16,9 @@ A common task for a bot is to ask information from the user. In v5.0 of this lib
 ### [`conversationbot2.py`](https://github.com/python-telegram-bot/python-telegram-bot/blob/master/examples/conversationbot2.py)
 A more complex example of a bot that uses the `ConversationHandler`. It is also more confusing. Good thing there is a [fancy state diagram](https://github.com/python-telegram-bot/python-telegram-bot/blob/master/examples/conversationbot2.png) for this one, too!
 
+### [`nestedconversationbot.py`](https://github.com/python-telegram-bot/python-telegram-bot/blob/master/examples/nestedconversationbot.py)
+A even more complex example of a bot that uses the nested `ConversationHandler`s. While it's certainly not that complex that you couldn't built it without nested `ConversationHanldler`s, it gives a good impression on how to work with them. Of course, there is a [fancy state diagram](https://github.com/python-telegram-bot/python-telegram-bot/blob/master/examples/nestedconversationbot.png) for this example, too!
+
 ### [`inlinekeyboard.py`](https://github.com/python-telegram-bot/python-telegram-bot/blob/master/examples/inlinekeyboard.py)
 This example sheds some light on inline keyboards, callback queries and message editing.
 

examples/deeplinking.py

@@ -30,7 +30,7 @@ logging.basicConfig(format='%(asctime)s - %(name)s - %(levelname)s - %(message)s
 
 logger = logging.getLogger(__name__)
 
-# Define constants the will allow us to reuse the deep-linking parameters.
+# Define constants that will allow us to reuse the deep-linking parameters.
 CHECK_THIS_OUT = 'check-this-out'
 USING_ENTITIES = 'using-entities-here'
 SO_COOL = 'so-cool'

examples/echobot2.py

@@ -26,8 +26,8 @@ logging.basicConfig(format='%(asctime)s - %(name)s - %(levelname)s - %(message)s
 logger = logging.getLogger(__name__)
 
 
-# Define a few command handlers. These usually take the two arguments bot and
-# update. Error handlers also receive the raised TelegramError object in error.
+# Define a few command handlers. These usually take the two arguments update and
+# context. Error handlers also receive the raised TelegramError object in error.
 def start(update, context):
     """Send a message when the command /start is issued."""
     update.message.reply_text('Hi!')

examples/inlinebot.py

@@ -27,8 +27,8 @@ logging.basicConfig(format='%(asctime)s - %(name)s - %(levelname)s - %(message)s
 logger = logging.getLogger(__name__)
 
 
-# Define a few command handlers. These usually take the two arguments bot and
-# update. Error handlers also receive the raised TelegramError object in error.
+# Define a few command handlers. These usually take the two arguments update and
+# context. Error handlers also receive the raised TelegramError object in error.
 def start(update, context):
     """Send a message when the command /start is issued."""
     update.message.reply_text('Hi!')

examples/inlinekeyboard2.py

@@ -36,7 +36,7 @@ def start(update, context):
     # Build InlineKeyboard where each button has a displayed text
     # and a string as callback_data
     # The keyboard is a list of button rows, where each row is in turn
-    # a list (henc `[[...]]`).
+    # a list (hence `[[...]]`).
     keyboard = [
         [InlineKeyboardButton("1", callback_data=str(ONE)),
          InlineKeyboardButton("2", callback_data=str(TWO))]
@@ -47,7 +47,7 @@ def start(update, context):
         "Start handler, Choose a route",
         reply_markup=reply_markup
     )
-    # Tell CosversationHandler that we're in State `FIRST` now
+    # Tell ConversationHandler that we're in state `FIRST` now
     return FIRST
 
 
@@ -173,7 +173,7 @@ def main():
     dp = updater.dispatcher
 
     # Setup conversation handler with the states FIRST and SECOND
-    # Use the pattern parameter to pass CallbackQueryies with specific
+    # Use the pattern parameter to pass CallbackQueries with specific
     # data pattern to the corresponding handlers.
     # ^ means "start of line/string"
     # $ means "end of line/string"
@@ -191,7 +191,7 @@ def main():
         fallbacks=[CommandHandler('start', start)]
     )
 
-    # Add conversationhandler to dispatcher it will be used for handling
+    # Add ConversationHandler to dispatcher that will be used for handling
     # updates
     dp.add_handler(conv_handler)
 

examples/nestedconversationbot.py

@@ -0,0 +1,362 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# This program is dedicated to the public domain under the CC0 license.
+
+"""
+First, a few callback functions are defined. Then, those functions are passed to
+the Dispatcher and registered at their respective places.
+Then, the bot is started and runs until we press Ctrl-C on the command line.
+
+Usage:
+Example of a bot-user conversation using nested ConversationHandlers.
+Send /start to initiate the conversation.
+Press Ctrl-C on the command line or send a signal to the process to stop the
+bot.
+"""
+
+import logging
+
+from telegram import (InlineKeyboardMarkup, InlineKeyboardButton)
+from telegram.ext import (Updater, CommandHandler, MessageHandler, Filters,
+                          ConversationHandler, CallbackQueryHandler)
+
+# Enable logging
+logging.basicConfig(format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
+                    level=logging.INFO)
+
+logger = logging.getLogger(__name__)
+
+# State definitions for top level conversation
+SELECTING_ACTION, ADDING_MEMBER, ADDING_SELF, DESCRIBING_SELF = map(chr, range(4))
+# State definitions for second level conversation
+SELECTING_LEVEL, SELECTING_GENDER = map(chr, range(4, 6))
+# State definitions for descriptions conversation
+SELECTING_FEATURE, TYPING = map(chr, range(6, 8))
+# Meta states
+STOPPING, SHOWING = map(chr, range(8, 10))
+# Shortcut for ConversationHandler.END
+END = ConversationHandler.END
+
+# Different constants for this example
+(PARENTS, CHILDREN, SELF, GENDER, MALE, FEMALE, AGE, NAME, START_OVER, FEATURES,
+ CURRENT_FEATURE, CURRENT_LEVEL) = map(chr, range(10, 22))
+
+
+# Helper
+def _name_switcher(level):
+    if level == PARENTS:
+        return ('Father', 'Mother')
+    elif level == CHILDREN:
+        return ('Brother', 'Sister')
+
+
+# Top level conversation callbacks
+def start(update, context):
+    """Select an action: Adding parent/child or show data."""
+    text = 'You may add a familiy member, yourself show the gathered data or end the ' \
+           'conversation. To abort, simply type /stop.'
+    buttons = [[
+        InlineKeyboardButton(text='Add family member', callback_data=str(ADDING_MEMBER)),
+        InlineKeyboardButton(text='Add yourself', callback_data=str(ADDING_SELF))
+    ], [
+        InlineKeyboardButton(text='Show data', callback_data=str(SHOWING)),
+        InlineKeyboardButton(text='Done', callback_data=str(END))
+    ]]
+    keyboard = InlineKeyboardMarkup(buttons)
+
+    # If we're starting over we don't need do send a new message
+    if context.user_data.get(START_OVER):
+        update.callback_query.edit_message_text(text=text, reply_markup=keyboard)
+    else:
+        update.message.reply_text('Hi, I\'m FamiliyBot and here to help you gather information'
+                                  'about your family.')
+        update.message.reply_text(text=text, reply_markup=keyboard)
+
+    context.user_data[START_OVER] = False
+    return SELECTING_ACTION
+
+
+def adding_self(update, context):
+    """Add information about youself."""
+    context.user_data[CURRENT_LEVEL] = SELF
+    text = 'Okay, please tell me about yourself.'
+    button = InlineKeyboardButton(text='Add info', callback_data=str(MALE))
+    keyboard = InlineKeyboardMarkup.from_button(button)
+
+    update.callback_query.edit_message_text(text=text, reply_markup=keyboard)
+
+    return DESCRIBING_SELF
+
+
+def show_data(update, context):
+    """Pretty print gathered data."""
+    def prettyprint(user_data, level):
+        people = user_data.get(level)
+        if not people:
+            return '\nNo information yet.'
+
+        text = ''
+        if level == SELF:
+            for person in user_data[level]:
+                text += '\nName: {0}, Age: {1}'.format(person.get(NAME, '-'), person.get(AGE, '-'))
+        else:
+            male, female = _name_switcher(level)
+
+            for person in user_data[level]:
+                gender = female if person[GENDER] == FEMALE else male
+                text += '\n{0}: Name: {1}, Age: {2}'.format(gender, person.get(NAME, '-'),
+                                                            person.get(AGE, '-'))
+        return text
+
+    ud = context.user_data
+    text = 'Yourself:' + prettyprint(ud, SELF)
+    text += '\n\nParents:' + prettyprint(ud, PARENTS)
+    text += '\n\nChildren:' + prettyprint(ud, CHILDREN)
+
+    buttons = [[
+        InlineKeyboardButton(text='Back', callback_data=str(END))
+    ]]
+    keyboard = InlineKeyboardMarkup(buttons)
+
+    update.callback_query.edit_message_text(text=text, reply_markup=keyboard)
+    ud[START_OVER] = True
+
+    return SHOWING
+
+
+def stop(update, context):
+    """End Conversation by command."""
+    update.message.reply_text('Okay, bye.')
+
+    return END
+
+
+def end(update, context):
+    """End conversation from InlineKeyboardButton."""
+    text = 'See you around!'
+    update.callback_query.edit_message_text(text=text)
+
+    return END
+
+
+# Second level conversation callbacks
+def select_level(update, context):
+    """Choose to add a parent or a child."""
+    text = 'You may add a parent or a child. Also you can show the gathered data or go back.'
+    buttons = [[
+        InlineKeyboardButton(text='Add parent', callback_data=str(PARENTS)),
+        InlineKeyboardButton(text='Add child', callback_data=str(CHILDREN))
+    ], [
+        InlineKeyboardButton(text='Show data', callback_data=str(SHOWING)),
+        InlineKeyboardButton(text='Back', callback_data=str(END))
+    ]]
+    keyboard = InlineKeyboardMarkup(buttons)
+    update.callback_query.edit_message_text(text=text, reply_markup=keyboard)
+
+    return SELECTING_LEVEL
+
+
+def select_gender(update, context):
+    """Choose to add mother or father."""
+    level = update.callback_query.data
+    context.user_data[CURRENT_LEVEL] = level
+
+    text = 'Please choose, whom to add.'
+
+    male, female = _name_switcher(level)
+
+    buttons = [[
+        InlineKeyboardButton(text='Add ' + male, callback_data=str(MALE)),
+        InlineKeyboardButton(text='Add ' + female, callback_data=str(FEMALE))
+    ], [
+        InlineKeyboardButton(text='Show data', callback_data=str(SHOWING)),
+        InlineKeyboardButton(text='Back', callback_data=str(END))
+    ]]
+
+    keyboard = InlineKeyboardMarkup(buttons)
+    update.callback_query.edit_message_text(text=text, reply_markup=keyboard)
+
+    return SELECTING_GENDER
+
+
+def end_second_level(update, context):
+    """Return to top level conversation."""
+    context.user_data[START_OVER] = True
+    start(update, context)
+
+    return END
+
+
+# Third level callbacks
+def select_feature(update, context):
+    """Select a feature to update for the person."""
+    buttons = [[
+        InlineKeyboardButton(text='Name', callback_data=str(NAME)),
+        InlineKeyboardButton(text='Age', callback_data=str(AGE)),
+        InlineKeyboardButton(text='Done', callback_data=str(END)),
+    ]]
+    keyboard = InlineKeyboardMarkup(buttons)
+
+    # If we collect features for a new person, clear the cache and save the gender
+    if not context.user_data.get(START_OVER):
+        context.user_data[FEATURES] = {GENDER: update.callback_query.data}
+        text = 'Please select a feature to update.'
+        update.callback_query.edit_message_text(text=text, reply_markup=keyboard)
+    # But after we do that, we need to send a new message
+    else:
+        text = 'Got it! Please select a feature to update.'
+        update.message.reply_text(text=text, reply_markup=keyboard)
+
+    context.user_data[START_OVER] = False
+    return SELECTING_FEATURE
+
+
+def ask_for_input(update, context):
+    """Prompt user to input data for selected feature."""
+    context.user_data[CURRENT_FEATURE] = update.callback_query.data
+    text = 'Okay, tell me.'
+    update.callback_query.edit_message_text(text=text)
+
+    return TYPING
+
+
+def save_input(update, context):
+    """Save input for feature and return to feature selection."""
+    ud = context.user_data
+    ud[FEATURES][ud[CURRENT_FEATURE]] = update.message.text
+
+    ud[START_OVER] = True
+
+    return select_feature(update, context)
+
+
+def end_describing(update, context):
+    """End gathering of features and return to parent conversation."""
+    ud = context.user_data
+    level = ud[CURRENT_LEVEL]
+    if not ud.get(level):
+        ud[level] = []
+    ud[level].append(ud[FEATURES])
+
+    # Print upper level menu
+    if level == SELF:
+        ud[START_OVER] = True
+        start(update, context)
+    else:
+        select_level(update, context)
+
+    return END
+
+
+def stop_nested(update, context):
+    """Completely end conversation from within nested conversation."""
+    update.message.reply_text('Okay, bye.')
+
+    return STOPPING
+
+
+# Error handler
+def error(update, context):
+    """Log Errors caused by Updates."""
+    logger.warning('Update "%s" caused error "%s"', update, context.error)
+
+
+def main():
+    # Create the Updater and pass it your bot's token.
+    # Make sure to set use_context=True to use the new context based callbacks
+    # Post version 12 this will no longer be necessary
+    updater = Updater("TOKEN", use_context=True)
+
+    # Get the dispatcher to register handlers
+    dp = updater.dispatcher
+
+    # Set up third level ConversationHandler (collecting features)
+    description_conv = ConversationHandler(
+        entry_points=[CallbackQueryHandler(select_feature,
+                                           pattern='^' + str(MALE) + '$|^' + str(FEMALE) + '$')],
+
+        states={
+            SELECTING_FEATURE: [CallbackQueryHandler(ask_for_input,
+                                                     pattern='^(?!' + str(END) + ').*$')],
+            TYPING: [MessageHandler(Filters.text, save_input)],
+        },
+
+        fallbacks=[
+            CallbackQueryHandler(end_describing, pattern='^' + str(END) + '$'),
+            CommandHandler('stop', stop_nested)
+        ],
+
+        map_to_parent={
+            # Return to second level menu
+            END: SELECTING_LEVEL,
+            # End conversation alltogether
+            STOPPING: STOPPING,
+        }
+    )
+
+    # Set up second level ConversationHandler (adding a person)
+    add_member_conv = ConversationHandler(
+        entry_points=[CallbackQueryHandler(select_level,
+                                           pattern='^' + str(ADDING_MEMBER) + '$')],
+
+        states={
+            SELECTING_LEVEL: [CallbackQueryHandler(select_gender,
+                                                   pattern='^{0}$|^{1}$'.format(str(PARENTS),
+                                                                                str(CHILDREN)))],
+            SELECTING_GENDER: [description_conv]
+        },
+
+        fallbacks=[
+            CallbackQueryHandler(show_data, pattern='^' + str(SHOWING) + '$'),
+            CallbackQueryHandler(end_second_level, pattern='^' + str(END) + '$'),
+            CommandHandler('stop', stop_nested)
+        ],
+
+        map_to_parent={
+            # After showing data return to top level menu
+            SHOWING: SHOWING,
+            # Return to top level menu
+            END: SELECTING_ACTION,
+            # End conversation alltogether
+            STOPPING: END,
+        }
+    )
+
+    # Set up top level ConversationHandler (selecting action)
+    conv_handler = ConversationHandler(
+        entry_points=[CommandHandler('start', start)],
+
+        states={
+            SHOWING: [CallbackQueryHandler(start, pattern='^' + str(END) + '$')],
+            SELECTING_ACTION: [
+                add_member_conv,
+                CallbackQueryHandler(show_data, pattern='^' + str(SHOWING) + '$'),
+                CallbackQueryHandler(adding_self, pattern='^' + str(ADDING_SELF) + '$'),
+                CallbackQueryHandler(end, pattern='^' + str(END) + '$'),
+            ],
+            DESCRIBING_SELF: [description_conv],
+        },
+
+        fallbacks=[CommandHandler('stop', stop)],
+    )
+    # Because the states of the third level conversation map to the ones of the
+    # second level conversation, we need to be a bit hacky about that:
+    conv_handler.states[SELECTING_LEVEL] = conv_handler.states[SELECTING_ACTION]
+    conv_handler.states[STOPPING] = conv_handler.entry_points
+
+    dp.add_handler(conv_handler)
+
+    # log all errors
+    dp.add_error_handler(error)
+
+    # Start the Bot
+    updater.start_polling()
+
+    # Run the bot until you press Ctrl-C or the process receives SIGINT,
+    # SIGTERM or SIGABRT. This should be used most of the time, since
+    # start_polling() is non-blocking and will stop the bot gracefully.
+    updater.idle()
+
+
+if __name__ == '__main__':
+    main()

examples/paymentbot.py

@@ -103,9 +103,9 @@ def precheckout_callback(update, context):
         query.answer(ok=True)
 
 
-# finally, after contacting to the payment provider...
+# finally, after contacting the payment provider...
 def successful_payment_callback(update, context):
-    # do something after successful receive of payment?
+    # do something after successfully receiving payment?
     update.message.reply_text("Thank you for your payment!")
 
 

examples/timerbot.py

@@ -29,8 +29,8 @@ logging.basicConfig(format='%(asctime)s - %(name)s - %(levelname)s - %(message)s
 logger = logging.getLogger(__name__)
 
 
-# Define a few command handlers. These usually take the two arguments bot and
-# update. Error handlers also receive the raised TelegramError object in error.
+# Define a few command handlers. These usually take the two arguments update and
+# context. Error handlers also receive the raised TelegramError object in error.
 def start(update, context):
     update.message.reply_text('Hi! Use /set <seconds> to set a timer')
 

requirements-dev.txt

@@ -8,3 +8,4 @@ beautifulsoup4
 pytest==4.2.0
 pytest-timeout
 wheel
+attrs==19.1.0

setup.cfg

@@ -14,7 +14,8 @@ upload-dir = docs/build/html
 
 [flake8]
 max-line-length = 99
-ignore = W503
+ignore = W503, W605
+exclude = setup.py, docs/source/conf.py
 
 [yapf]
 based_on_style = google

telegram/bot.py

@@ -3439,7 +3439,7 @@ class Bot(TelegramObject):
         return Poll.de_json(result, self)
 
     def to_dict(self):
-        data = {'id': self.id, 'username': self.username, 'first_name': self.username}
+        data = {'id': self.id, 'username': self.username, 'first_name': self.first_name}
 
         if self.last_name:
             data['last_name'] = self.last_name

telegram/ext/conversationhandler.py

@@ -64,6 +64,20 @@ class ConversationHandler(Handler):
     To end the conversation, the callback function must return :attr:`END` or ``-1``. To
     handle the conversation timeout, use handler :attr:`TIMEOUT` or ``-2``.
 
+    Note:
+        In each of the described collections of handlers, a handler may in turn be a
+        :class:`ConversationHandler`. In that case, the nested :class:`ConversationHandler` should
+        have the attribute :attr:`map_to_parent` which allows to return to the parent conversation
+        at specified states within the nested conversation.
+
+        Note that the keys in :attr:`map_to_parent` must not appear as keys in :attr:`states`
+        attribute or else the latter will be ignored. You may map :attr:`END` to one of the parents
+        states to continue the parent conversation after this has ended or even map a state to
+        :attr:`END` to end the *parent* conversation from within the nested one. For an example on
+        nested :class:`ConversationHandler` s, see our `examples`_.
+
+    .. _`examples`: https://github.com/python-telegram-bot/python-telegram-bot/blob/master/examples
+
     Attributes:
         entry_points (List[:class:`telegram.ext.Handler`]): A list of ``Handler`` objects that can
             trigger the start of the conversation.
@@ -88,6 +102,9 @@ class ConversationHandler(Handler):
             persistence
         persistent (:obj:`bool`): Optional. If the conversations dict for this handler should be
             saved. Name is required and persistence has to be set in :class:`telegram.ext.Updater`
+        map_to_parent (Dict[:obj:`object`, :obj:`object`]): Optional. A :obj:`dict` that can be
+            used to instruct a nested conversationhandler to transition into a mapped state on
+            its parent conversationhandler in place of a specified nested state.
 
     Args:
         entry_points (List[:class:`telegram.ext.Handler`]): A list of ``Handler`` objects that can
@@ -119,6 +136,9 @@ class ConversationHandler(Handler):
             persistence
         persistent (:obj:`bool`, optional): If the conversations dict for this handler should be
             saved. Name is required and persistence has to be set in :class:`telegram.ext.Updater`
+        map_to_parent (Dict[:obj:`object`, :obj:`object`], optional): A :obj:`dict` that can be
+            used to instruct a nested conversationhandler to transition into a mapped state on
+            its parent conversationhandler in place of a specified nested state.
 
     Raises:
         ValueError
@@ -142,7 +162,8 @@ class ConversationHandler(Handler):
                  per_message=False,
                  conversation_timeout=None,
                  name=None,
-                 persistent=False):
+                 persistent=False,
+                 map_to_parent=None):
 
         self.entry_points = entry_points
         self.states = states
@@ -160,6 +181,7 @@ class ConversationHandler(Handler):
         self.persistence = None
         """:obj:`telegram.ext.BasePersistance`: The persistence used to store conversations.
         Set by dispatcher"""
+        self.map_to_parent = map_to_parent
 
         self.timeout_jobs = dict()
         self.conversations = dict()
@@ -328,7 +350,11 @@ class ConversationHandler(Handler):
                 self._trigger_timeout, self.conversation_timeout,
                 context=_ConversationTimeoutContext(conversation_key, update, dispatcher))
 
-        self.update_state(new_state, conversation_key)
+        if isinstance(self.map_to_parent, dict) and new_state in self.map_to_parent:
+            self.update_state(self.END, conversation_key)
+            return self.map_to_parent.get(new_state)
+        else:
+            self.update_state(new_state, conversation_key)
 
     def update_state(self, new_state, key):
         if new_state == self.END:

telegram/ext/handler.py

@@ -151,14 +151,11 @@ class Handler(object):
             optional_args['update_queue'] = dispatcher.update_queue
         if self.pass_job_queue:
             optional_args['job_queue'] = dispatcher.job_queue
-        if self.pass_user_data or self.pass_chat_data:
-            chat = update.effective_chat
+        if self.pass_user_data:
             user = update.effective_user
-
-            if self.pass_user_data:
-                optional_args['user_data'] = dispatcher.user_data[user.id if user else None]
-
-            if self.pass_chat_data:
-                optional_args['chat_data'] = dispatcher.chat_data[chat.id if chat else None]
+            optional_args['user_data'] = dispatcher.user_data[user.id if user else None]
+        if self.pass_chat_data:
+            chat = update.effective_chat
+            optional_args['chat_data'] = dispatcher.chat_data[chat.id if chat else None]
 
         return optional_args

telegram/version.py

@@ -17,4 +17,4 @@
 # You should have received a copy of the GNU Lesser Public License
 # along with this program.  If not, see [http://www.gnu.org/licenses/].
 
-__version__ = '12.1.0'
+__version__ = '12.2.0'

tests/conftest.py

@@ -16,8 +16,10 @@
 #
 # 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 datetime
 import os
 import sys
+import re
 from collections import defaultdict
 from queue import Queue
 from threading import Thread, Event
@@ -25,8 +27,9 @@ from time import sleep
 
 import pytest
 
-from telegram import Bot
-from telegram.ext import Dispatcher, JobQueue, Updater
+from telegram import Bot, Message, User, Chat, MessageEntity, Update, \
+    InlineQuery, CallbackQuery, ShippingQuery, PreCheckoutQuery, ChosenInlineResult
+from telegram.ext import Dispatcher, JobQueue, Updater, BaseFilter
 from tests.bots import get_bot
 
 TRAVIS = os.getenv('TRAVIS', False)
@@ -46,7 +49,7 @@ def bot_info():
 
 @pytest.fixture(scope='session')
 def bot(bot_info):
-    return Bot(bot_info['token'], private_key=PRIVATE_KEY)
+    return make_bot(bot_info)
 
 
 @pytest.fixture(scope='session')
@@ -146,3 +149,107 @@ def pytest_configure(config):
     if sys.version_info >= (3,):
         config.addinivalue_line('filterwarnings', 'ignore::ResourceWarning')
         # TODO: Write so good code that we don't need to ignore ResourceWarnings anymore
+
+
+def make_bot(bot_info):
+    return Bot(bot_info['token'], private_key=PRIVATE_KEY)
+
+
+CMD_PATTERN = re.compile(r'/[\da-z_]{1,32}(?:@\w{1,32})?')
+DATE = datetime.datetime.now()
+
+
+def make_message(text, **kwargs):
+    """
+    Testing utility factory to create a fake ``telegram.Message`` with
+    reasonable defaults for mimicking a real message.
+    :param text: (str) message text
+    :return: a (fake) ``telegram.Message``
+    """
+    return Message(message_id=1,
+                   from_user=kwargs.pop('user', User(id=1, first_name='', is_bot=False)),
+                   date=kwargs.pop('date', DATE),
+                   chat=kwargs.pop('chat', Chat(id=1, type='')),
+                   text=text,
+                   bot=kwargs.pop('bot', make_bot(get_bot())),
+                   **kwargs)
+
+
+def make_command_message(text, **kwargs):
+    """
+    Testing utility factory to create a message containing a single telegram
+    command.
+    Mimics the Telegram API in that it identifies commands within the message
+    and tags the returned ``Message`` object with the appropriate ``MessageEntity``
+    tag (but it does this only for commands).
+
+    :param text: (str) message text containing (or not) the command
+    :return: a (fake) ``telegram.Message`` containing only the command
+    """
+
+    match = re.search(CMD_PATTERN, text)
+    entities = [MessageEntity(type=MessageEntity.BOT_COMMAND,
+                              offset=match.start(0),
+                              length=len(match.group(0)))] if match else []
+
+    return make_message(text, entities=entities, **kwargs)
+
+
+def make_message_update(message, message_factory=make_message, edited=False, **kwargs):
+    """
+    Testing utility factory to create an update from a message, as either a
+    ``telegram.Message`` or a string. In the latter case ``message_factory``
+    is used to convert ``message`` to a ``telegram.Message``.
+    :param message: either a ``telegram.Message`` or a string with the message text
+    :param message_factory: function to convert the message text into a ``telegram.Message``
+    :param edited: whether the message should be stored as ``edited_message`` (vs. ``message``)
+    :return: ``telegram.Update`` with the given message
+    """
+    if not isinstance(message, Message):
+        message = message_factory(message, **kwargs)
+    update_kwargs = {'message' if not edited else 'edited_message': message}
+    return Update(0, **update_kwargs)
+
+
+def make_command_update(message, edited=False, **kwargs):
+    """
+    Testing utility factory to create an update from a message that potentially
+    contains a command. See ``make_command_message`` for more details.
+    :param message: message potentially containing a command
+    :param edited: whether the message should be stored as ``edited_message`` (vs. ``message``)
+    :return: ``telegram.Update`` with the given message
+    """
+    return make_message_update(message, make_command_message, edited, **kwargs)
+
+
+@pytest.fixture(scope='function')
+def mock_filter():
+    class MockFilter(BaseFilter):
+        def __init__(self):
+            self.tested = False
+
+        def filter(self, message):
+            self.tested = True
+
+    return MockFilter()
+
+
+def get_false_update_fixture_decorator_params():
+    message = Message(1, User(1, '', False), DATE, Chat(1, ''), text='test')
+    params = [
+        {'callback_query': CallbackQuery(1, User(1, '', False), 'chat', message=message)},
+        {'channel_post': message},
+        {'edited_channel_post': message},
+        {'inline_query': InlineQuery(1, User(1, '', False), '', '')},
+        {'chosen_inline_result': ChosenInlineResult('id', User(1, '', False), '')},
+        {'shipping_query': ShippingQuery('id', User(1, '', False), '', None)},
+        {'pre_checkout_query': PreCheckoutQuery('id', User(1, '', False), '', 0, '')},
+        {'callback_query': CallbackQuery(1, User(1, '', False), 'chat')}
+    ]
+    ids = tuple(key for kwargs in params for key in kwargs)
+    return {'params': params, 'ids': ids}
+
+
+@pytest.fixture(scope='function', **get_false_update_fixture_decorator_params())
+def false_update(request):
+    return Update(update_id=1, **request.param)

tests/test_bot.py

@@ -89,6 +89,18 @@ class TestBot(object):
         assert get_me_bot.last_name == bot.last_name
         assert get_me_bot.name == bot.name
 
+    @flaky(3, 1)
+    @pytest.mark.timeout(10)
+    def test_to_dict(self, bot):
+        to_dict_bot = bot.to_dict()
+
+        assert isinstance(to_dict_bot, dict)
+        assert to_dict_bot["id"] == bot.id
+        assert to_dict_bot["username"] == bot.username
+        assert to_dict_bot["first_name"] == bot.first_name
+        if bot.last_name:
+            assert to_dict_bot["last_name"] == bot.last_name
+
     @flaky(3, 1)
     @pytest.mark.timeout(10)
     def test_forward_message(self, bot, chat_id, message):

tests/test_commandhandler.py

@@ -21,50 +21,30 @@ import re
 from queue import Queue
 
 import pytest
+import itertools
 from telegram.utils.deprecate import TelegramDeprecationWarning
 
-from telegram import (Message, Update, Chat, Bot, User, CallbackQuery, InlineQuery,
-                      ChosenInlineResult, ShippingQuery, PreCheckoutQuery, MessageEntity)
-from telegram.ext import CommandHandler, Filters, BaseFilter, CallbackContext, JobQueue, \
-    PrefixHandler
-
-message = Message(1, User(1, '', False), None, Chat(1, ''), text='test')
-
-params = [
-    {'callback_query': CallbackQuery(1, User(1, '', False), 'chat', message=message)},
-    {'channel_post': message},
-    {'edited_channel_post': message},
-    {'inline_query': InlineQuery(1, User(1, '', False), '', '')},
-    {'chosen_inline_result': ChosenInlineResult('id', User(1, '', False), '')},
-    {'shipping_query': ShippingQuery('id', User(1, '', False), '', None)},
-    {'pre_checkout_query': PreCheckoutQuery('id', User(1, '', False), '', 0, '')},
-    {'callback_query': CallbackQuery(1, User(1, '', False), 'chat')}
-]
-
-ids = ('callback_query', 'channel_post', 'edited_channel_post', 'inline_query',
-       'chosen_inline_result', 'shipping_query', 'pre_checkout_query',
-       'callback_query_without_message',)
+from telegram import Message, Update, Chat, Bot
+from telegram.ext import CommandHandler, Filters, CallbackContext, JobQueue, PrefixHandler
+from tests.conftest import make_command_message, make_command_update, make_message, \
+    make_message_update
 
 
-@pytest.fixture(scope='class', params=params, ids=ids)
-def false_update(request):
-    return Update(update_id=1, **request.param)
+def is_match(handler, update):
+    """
+    Utility function that returns whether an update matched
+    against a specific handler.
+    :param handler: ``CommandHandler`` to check against
+    :param update: update to check
+    :return: (bool) whether ``update`` matched with ``handler``
+    """
+    check = handler.check_update(update)
+    return check is not None and check is not False
 
 
-@pytest.fixture(scope='function')
-def message(bot):
-    return Message(message_id=1,
-                   from_user=User(id=1, first_name='', is_bot=False),
-                   date=None,
-                   chat=Chat(id=1, type=''),
-                   message='/test',
-                   bot=bot,
-                   entities=[MessageEntity(type=MessageEntity.BOT_COMMAND,
-                                           offset=0,
-                                           length=len('/test'))])
-
-
-class TestCommandHandler(object):
+class BaseTest(object):
+    """Base class for command and prefix handler test classes. Contains
+    utility methods an several callbacks used by both classes."""
     test_flag = False
     SRE_TYPE = type(re.match("", ""))
 
@@ -72,30 +52,33 @@ class TestCommandHandler(object):
     def reset(self):
         self.test_flag = False
 
+    PASS_KEYWORDS = ('pass_user_data', 'pass_chat_data', 'pass_job_queue', 'pass_update_queue')
+
+    @pytest.fixture(scope='module', params=itertools.combinations(PASS_KEYWORDS, 2))
+    def pass_combination(self, request):
+        return {key: True for key in request.param}
+
+    def response(self, dispatcher, update):
+        """
+        Utility to send an update to a dispatcher and assert
+        whether the callback was called appropriately. Its purpose is
+        for repeated usage in the same test function.
+        """
+        self.test_flag = False
+        dispatcher.process_update(update)
+        return self.test_flag
+
     def callback_basic(self, bot, update):
         test_bot = isinstance(bot, Bot)
         test_update = isinstance(update, Update)
         self.test_flag = test_bot and test_update
 
-    def callback_data_1(self, bot, update, user_data=None, chat_data=None):
-        self.test_flag = (user_data is not None) or (chat_data is not None)
+    def make_callback_for(self, pass_keyword):
+        def callback(bot, update, **kwargs):
+            self.test_flag = kwargs.get(keyword, None) is not None
 
-    def callback_data_2(self, bot, update, user_data=None, chat_data=None):
-        self.test_flag = (user_data is not None) and (chat_data is not None)
-
-    def callback_queue_1(self, bot, update, job_queue=None, update_queue=None):
-        self.test_flag = (job_queue is not None) or (update_queue is not None)
-
-    def callback_queue_2(self, bot, update, job_queue=None, update_queue=None):
-        self.test_flag = (job_queue is not None) and (update_queue is not None)
-
-    def ch_callback_args(self, bot, update, args):
-        if update.message.text == '/test':
-            self.test_flag = len(args) == 0
-        elif update.message.text == '/test@{}'.format(bot.username):
-            self.test_flag = len(args) == 0
-        else:
-            self.test_flag = args == ['one', 'two']
+        keyword = pass_keyword[5:]
+        return callback
 
     def callback_context(self, update, context):
         self.test_flag = (isinstance(context, CallbackContext)
@@ -122,550 +105,295 @@ class TestCommandHandler(object):
             num = len(context.matches) == 2
             self.test_flag = types and num
 
-    def test_basic(self, dp, message):
-        handler = CommandHandler('test', self.callback_basic)
+    def _test_context_args_or_regex(self, cdp, handler, text):
+        cdp.add_handler(handler)
+        update = make_command_update(text)
+        assert not self.response(cdp, update)
+        update.message.text += ' one two'
+        assert self.response(cdp, update)
+
+    def _test_edited(self, message, handler_edited, handler_not_edited):
+        """
+        Assert whether a handler that should accept edited messages
+        and a handler that shouldn't work correctly.
+        :param message: ``telegram.Message`` to check against the handlers
+        :param handler_edited:  handler that should accept edited messages
+        :param handler_not_edited:  handler that should not accept edited messages
+        """
+        update = make_command_update(message)
+        edited_update = make_command_update(message, edited=True)
+
+        assert is_match(handler_edited, update)
+        assert is_match(handler_edited, edited_update)
+        assert is_match(handler_not_edited, update)
+        assert not is_match(handler_not_edited, edited_update)
+
+
+# ----------------------------- CommandHandler -----------------------------
+
+class TestCommandHandler(BaseTest):
+    CMD = '/test'
+
+    @pytest.fixture(scope='class')
+    def command(self):
+        return self.CMD
+
+    @pytest.fixture(scope='class')
+    def command_message(self, command):
+        return make_command_message(command)
+
+    @pytest.fixture(scope='class')
+    def command_update(self, command_message):
+        return make_command_update(command_message)
+
+    def ch_callback_args(self, bot, update, args):
+        if update.message.text == self.CMD:
+            self.test_flag = len(args) == 0
+        elif update.message.text == '{}@{}'.format(self.CMD, bot.username):
+            self.test_flag = len(args) == 0
+        else:
+            self.test_flag = args == ['one', 'two']
+
+    def make_default_handler(self, callback=None, **kwargs):
+        callback = callback or self.callback_basic
+        return CommandHandler(self.CMD[1:], callback, **kwargs)
+
+    def test_basic(self, dp, command):
+        """Test whether a command handler responds to its command
+        and not to others, or badly formatted commands"""
+        handler = self.make_default_handler()
         dp.add_handler(handler)
 
-        message.text = '/test'
-        dp.process_update(Update(0, message))
-        assert self.test_flag
+        assert self.response(dp, make_command_update(command))
+        assert not is_match(handler, make_command_update(command[1:]))
+        assert not is_match(handler, make_command_update('/not{}'.format(command[1:])))
+        assert not is_match(handler, make_command_update('not {} at start'.format(command)))
 
-        message.text = '/nottest'
-        check = handler.check_update(Update(0, message))
-        assert check is None or check is False
-
-        message.text = 'test'
-        check = handler.check_update(Update(0, message))
-        assert check is None or check is False
-
-        message.text = 'not /test at start'
-        check = handler.check_update(Update(0, message))
-        assert check is None or check is False
-
-        message.entities = []
-        message.text = '/test'
-        check = handler.check_update(Update(0, message))
-        assert check is None or check is False
-
-    @pytest.mark.parametrize('command',
+    @pytest.mark.parametrize('cmd',
                              ['way_too_longcommand1234567yes_way_toooooooLong', 'ïñválídletters',
                               'invalid #&* chars'],
                              ids=['too long', 'invalid letter', 'invalid characters'])
-    def test_invalid_commands(self, command):
+    def test_invalid_commands(self, cmd):
         with pytest.raises(ValueError, match='not a valid bot command'):
-            CommandHandler(command, self.callback_basic)
+            CommandHandler(cmd, self.callback_basic)
 
-    def test_command_list(self, message):
+    def test_command_list(self):
+        """A command handler with multiple commands registered should respond to all of them."""
         handler = CommandHandler(['test', 'star'], self.callback_basic)
-
-        message.text = '/test'
-        check = handler.check_update(Update(0, message))
-
-        message.text = '/star'
-        check = handler.check_update(Update(0, message))
-
-        message.text = '/stop'
-        check = handler.check_update(Update(0, message))
-        assert check is None or check is False
+        assert is_match(handler, make_command_update('/test'))
+        assert is_match(handler, make_command_update('/star'))
+        assert not is_match(handler, make_command_update('/stop'))
 
     def test_deprecation_warning(self):
+        """``allow_edited`` deprecated in favor of filters"""
         with pytest.warns(TelegramDeprecationWarning, match='See https://git.io/fxJuV'):
-            CommandHandler('test', self.callback_basic, allow_edited=True)
+            self.make_default_handler(allow_edited=True)
 
-    def test_no_edited(self, message):
-        handler = CommandHandler('test', self.callback_basic)
-        message.text = '/test'
-        check = handler.check_update(Update(0, message))
-        assert check is not None and check is not False
+    def test_edited(self, command_message):
+        """Test that a CH responds to an edited message iff its filters allow it"""
+        handler_edited = self.make_default_handler()
+        handler_no_edited = self.make_default_handler(filters=~Filters.update.edited_message)
+        self._test_edited(command_message, handler_edited, handler_no_edited)
 
-        check = handler.check_update(Update(0, edited_message=message))
-        assert check is not None and check is not False
+    def test_edited_deprecated(self, command_message):
+        """Test that a CH responds to an edited message iff ``allow_edited`` is True"""
+        handler_edited = self.make_default_handler(allow_edited=True)
+        handler_no_edited = self.make_default_handler(allow_edited=False)
+        self._test_edited(command_message, handler_edited, handler_no_edited)
 
-        handler = CommandHandler('test', self.callback_basic,
-                                 filters=~Filters.update.edited_message)
-        check = handler.check_update(Update(0, message))
-        assert check is not None and check is not False
+    def test_directed_commands(self, bot, command):
+        """Test recognition of commands with a mention to the bot"""
+        handler = self.make_default_handler()
+        assert is_match(handler, make_command_update(command + '@' + bot.username, bot=bot))
+        assert not is_match(handler, make_command_update(command + '@otherbot', bot=bot))
 
-        check = handler.check_update(Update(0, edited_message=message))
-        assert check is None or check is False
+    def test_with_filter(self, command):
+        """Test that a CH with a (generic) filter responds iff its filters match"""
+        handler = self.make_default_handler(filters=Filters.group)
+        assert is_match(handler, make_command_update(command, chat=Chat(-23, Chat.GROUP)))
+        assert not is_match(handler, make_command_update(command, chat=Chat(23, Chat.PRIVATE)))
 
-    def test_edited_deprecated(self, message):
-        handler = CommandHandler('test', self.callback_basic,
-                                 allow_edited=False)
-        message.text = '/test'
-        check = handler.check_update(Update(0, message))
-        assert check is not None and check is not False
-
-        check = handler.check_update(Update(0, edited_message=message))
-        assert check is None or check is False
-
-        handler = CommandHandler('test', self.callback_basic,
-                                 allow_edited=True)
-        check = handler.check_update(Update(0, message))
-        assert check is not None and check is not False
-
-        check = handler.check_update(Update(0, edited_message=message))
-        assert check is not None and check is not False
-
-    def test_directed_commands(self, message):
-        handler = CommandHandler('test', self.callback_basic)
-
-        message.text = '/test@{}'.format(message.bot.username)
-        message.entities[0].length = len(message.text)
-        check = handler.check_update(Update(0, message))
-        assert check is not None and check is not False
-
-        message.text = '/test@otherbot'
-        check = handler.check_update(Update(0, message))
-        assert check is None or check is False
-
-    def test_with_filter(self, message):
-        handler = CommandHandler('test', self.callback_basic, Filters.group)
-
-        message.chat = Chat(-23, 'group')
-        message.text = '/test'
-        check = handler.check_update(Update(0, message))
-        assert check is not None and check is not False
-
-        message.chat = Chat(23, 'private')
-        check = handler.check_update(Update(0, message))
-        assert check is None or check is False
-
-    def test_pass_args(self, dp, message):
-        handler = CommandHandler('test', self.ch_callback_args, pass_args=True)
+    def test_pass_args(self, dp, bot, command):
+        """Test the passing of arguments alongside a command"""
+        handler = self.make_default_handler(self.ch_callback_args, pass_args=True)
         dp.add_handler(handler)
+        at_command = '{}@{}'.format(command, bot.username)
+        assert self.response(dp, make_command_update(command))
+        assert self.response(dp, make_command_update(command + ' one two'))
+        assert self.response(dp, make_command_update(at_command, bot=bot))
+        assert self.response(dp, make_command_update(at_command + ' one two', bot=bot))
 
-        message.text = '/test'
-        dp.process_update(Update(0, message=message))
-        assert self.test_flag
-
-        self.test_flag = False
-        message.text = '/test@{}'.format(message.bot.username)
-        message.entities[0].length = len(message.text)
-        dp.process_update(Update(0, message=message))
-        assert self.test_flag
-
-        self.test_flag = False
-        message.text = '/test@{} one two'.format(message.bot.username)
-        dp.process_update(Update(0, message=message))
-        assert self.test_flag
-
-        self.test_flag = False
-        message.text = '/test one two'
-        message.entities[0].length = len('/test')
-        dp.process_update(Update(0, message=message))
-        assert self.test_flag
-
-    def test_newline(self, dp, message):
-        handler = CommandHandler('test', self.callback_basic)
+    def test_newline(self, dp, command):
+        """Assert that newlines don't interfere with a command handler matching a message"""
+        handler = self.make_default_handler()
         dp.add_handler(handler)
+        update = make_command_update(command + '\nfoobar')
+        assert is_match(handler, update)
+        assert self.response(dp, update)
 
-        message.text = '/test\nfoobar'
-        check = handler.check_update(Update(0, message))
-        assert check is not None and check is not False
-
-        dp.process_update(Update(0, message))
-        assert self.test_flag
-
-    def test_pass_user_or_chat_data(self, dp, message):
-        handler = CommandHandler('test', self.callback_data_1,
-                                 pass_user_data=True)
+    @pytest.mark.parametrize('pass_keyword', BaseTest.PASS_KEYWORDS)
+    def test_pass_data(self, dp, command_update, pass_combination, pass_keyword):
+        handler = CommandHandler('test', self.make_callback_for(pass_keyword), **pass_combination)
         dp.add_handler(handler)
-
-        message.text = '/test'
-        dp.process_update(Update(0, message=message))
-        assert self.test_flag
-
-        dp.remove_handler(handler)
-        handler = CommandHandler('test', self.callback_data_1,
-                                 pass_chat_data=True)
-        dp.add_handler(handler)
-
-        self.test_flag = False
-        dp.process_update(Update(0, message=message))
-        assert self.test_flag
-
-        dp.remove_handler(handler)
-        handler = CommandHandler('test', self.callback_data_2,
-                                 pass_chat_data=True,
-                                 pass_user_data=True)
-        dp.add_handler(handler)
-
-        self.test_flag = False
-        dp.process_update(Update(0, message=message))
-        assert self.test_flag
-
-    def test_pass_job_or_update_queue(self, dp, message):
-        handler = CommandHandler('test', self.callback_queue_1,
-                                 pass_job_queue=True)
-        dp.add_handler(handler)
-
-        message.text = '/test'
-        dp.process_update(Update(0, message=message))
-        assert self.test_flag
-
-        dp.remove_handler(handler)
-        handler = CommandHandler('test', self.callback_queue_1,
-                                 pass_update_queue=True)
-        dp.add_handler(handler)
-
-        self.test_flag = False
-        dp.process_update(Update(0, message=message))
-        assert self.test_flag
-
-        dp.remove_handler(handler)
-        handler = CommandHandler('test', self.callback_queue_2,
-                                 pass_job_queue=True,
-                                 pass_update_queue=True)
-        dp.add_handler(handler)
-
-        self.test_flag = False
-        dp.process_update(Update(0, message=message))
-        assert self.test_flag
+        assert self.response(dp, command_update) == pass_combination.get(pass_keyword, False)
 
     def test_other_update_types(self, false_update):
-        handler = CommandHandler('test', self.callback_basic)
-        check = handler.check_update(false_update)
-        assert check is None or check is False
+        """Test that a command handler doesn't respond to unrelated updates"""
+        handler = self.make_default_handler()
+        assert not is_match(handler, false_update)
 
-    def test_filters_for_wrong_command(self, message):
+    def test_filters_for_wrong_command(self, mock_filter):
         """Filters should not be executed if the command does not match the handler"""
+        handler = self.make_default_handler(filters=mock_filter)
+        assert not is_match(handler, make_command_update('/star'))
+        assert not mock_filter.tested
 
-        class TestFilter(BaseFilter):
-            def __init__(self):
-                self.tested = False
-
-            def filter(self, message):
-                self.tested = True
-
-        test_filter = TestFilter()
-
-        handler = CommandHandler('test', self.callback_basic,
-                                 filters=test_filter)
-        message.text = '/star'
-
-        check = handler.check_update(Update(0, message=message))
-        assert check is None or check is False
-
-        assert not test_filter.tested
-
-    def test_context(self, cdp, message):
-        handler = CommandHandler('test', self.callback_context)
+    def test_context(self, cdp, command_update):
+        """Test correct behaviour of CHs with context-based callbacks"""
+        handler = self.make_default_handler(self.callback_context)
         cdp.add_handler(handler)
+        assert self.response(cdp, command_update)
 
-        message.text = '/test'
-        cdp.process_update(Update(0, message))
-        assert self.test_flag
+    def test_context_args(self, cdp, command):
+        """Test CHs that pass arguments through ``context``"""
+        handler = self.make_default_handler(self.callback_context_args)
+        self._test_context_args_or_regex(cdp, handler, command)
 
-    def test_context_args(self, cdp, message):
-        handler = CommandHandler('test', self.callback_context_args)
-        cdp.add_handler(handler)
+    def test_context_regex(self, cdp, command):
+        """Test CHs with context-based callbacks and a single filter"""
+        handler = self.make_default_handler(self.callback_context_regex1,
+                                            filters=Filters.regex('one two'))
+        self._test_context_args_or_regex(cdp, handler, command)
 
-        message.text = '/test'
-        cdp.process_update(Update(0, message))
-        assert not self.test_flag
-
-        message.text = '/test one two'
-        cdp.process_update(Update(0, message))
-        assert self.test_flag
-
-    def test_context_regex(self, cdp, message):
-        handler = CommandHandler('test', self.callback_context_regex1, Filters.regex('one two'))
-        cdp.add_handler(handler)
-
-        message.text = '/test'
-        cdp.process_update(Update(0, message))
-        assert not self.test_flag
-
-        message.text += ' one two'
-        cdp.process_update(Update(0, message))
-        assert self.test_flag
-
-    def test_context_multiple_regex(self, cdp, message):
-        handler = CommandHandler('test', self.callback_context_regex2,
-                                 Filters.regex('one') & Filters.regex('two'))
-        cdp.add_handler(handler)
-
-        message.text = '/test'
-        cdp.process_update(Update(0, message))
-        assert not self.test_flag
-
-        message.text += ' one two'
-        cdp.process_update(Update(0, message))
-        assert self.test_flag
+    def test_context_multiple_regex(self, cdp, command):
+        """Test CHs with context-based callbacks and filters combined"""
+        handler = self.make_default_handler(self.callback_context_regex2,
+                                            filters=Filters.regex('one') & Filters.regex('two'))
+        self._test_context_args_or_regex(cdp, handler, command)
 
 
-par = ['!help', '!test', '#help', '#test', 'mytrig-help', 'mytrig-test']
+# ----------------------------- PrefixHandler -----------------------------
+
+def combinations(prefixes, commands):
+    return (prefix + command for prefix in prefixes for command in commands)
 
 
-@pytest.fixture(scope='function', params=par)
-def prefixmessage(bot, request):
-    return Message(message_id=1,
-                   from_user=User(id=1, first_name='', is_bot=False),
-                   date=None,
-                   chat=Chat(id=1, type=''),
-                   text=request.param,
-                   bot=bot)
+class TestPrefixHandler(BaseTest):
+    # Prefixes and commands with which to test PrefixHandler:
+    PREFIXES = ['!', '#', 'mytrig-']
+    COMMANDS = ['help', 'test']
+    COMBINATIONS = list(combinations(PREFIXES, COMMANDS))
 
+    @pytest.fixture(scope='class', params=PREFIXES)
+    def prefix(self, request):
+        return request.param
 
-class TestPrefixHandler(object):
-    test_flag = False
-    SRE_TYPE = type(re.match("", ""))
+    @pytest.fixture(scope='class', params=[1, 2], ids=['single prefix', 'multiple prefixes'])
+    def prefixes(self, request):
+        return TestPrefixHandler.PREFIXES[:request.param]
 
-    @pytest.fixture(autouse=True)
-    def reset(self):
-        self.test_flag = False
+    @pytest.fixture(scope='class', params=COMMANDS)
+    def command(self, request):
+        return request.param
 
-    def callback_basic(self, bot, update):
-        test_bot = isinstance(bot, Bot)
-        test_update = isinstance(update, Update)
-        self.test_flag = test_bot and test_update
+    @pytest.fixture(scope='class', params=[1, 2], ids=['single command', 'multiple commands'])
+    def commands(self, request):
+        return TestPrefixHandler.COMMANDS[:request.param]
 
-    def callback_data_1(self, bot, update, user_data=None, chat_data=None):
-        self.test_flag = (user_data is not None) or (chat_data is not None)
+    @pytest.fixture(scope='class')
+    def prefix_message_text(self, prefix, command):
+        return prefix + command
 
-    def callback_data_2(self, bot, update, user_data=None, chat_data=None):
-        self.test_flag = (user_data is not None) and (chat_data is not None)
+    @pytest.fixture(scope='class')
+    def prefix_message(self, prefix_message_text):
+        return make_message(prefix_message_text)
 
-    def callback_queue_1(self, bot, update, job_queue=None, update_queue=None):
-        self.test_flag = (job_queue is not None) or (update_queue is not None)
+    @pytest.fixture(scope='class')
+    def prefix_message_update(self, prefix_message):
+        return make_message_update(prefix_message)
 
-    def callback_queue_2(self, bot, update, job_queue=None, update_queue=None):
-        self.test_flag = (job_queue is not None) and (update_queue is not None)
+    def make_default_handler(self, callback=None, **kwargs):
+        callback = callback or self.callback_basic
+        return PrefixHandler(self.PREFIXES, self.COMMANDS, callback, **kwargs)
 
     def ch_callback_args(self, bot, update, args):
-        if update.message.text in par:
+        if update.message.text in TestPrefixHandler.COMBINATIONS:
             self.test_flag = len(args) == 0
         else:
             self.test_flag = args == ['one', 'two']
 
-    def callback_context(self, update, context):
-        self.test_flag = (isinstance(context, CallbackContext)
-                          and isinstance(context.bot, Bot)
-                          and isinstance(update, Update)
-                          and isinstance(context.update_queue, Queue)
-                          and isinstance(context.job_queue, JobQueue)
-                          and isinstance(context.user_data, dict)
-                          and isinstance(context.chat_data, dict)
-                          and isinstance(update.message, Message))
-
-    def callback_context_args(self, update, context):
-        self.test_flag = context.args == ['one', 'two']
-
-    def callback_context_regex1(self, update, context):
-        if context.matches:
-            types = all([type(res) == self.SRE_TYPE for res in context.matches])
-            num = len(context.matches) == 1
-            self.test_flag = types and num
-
-    def callback_context_regex2(self, update, context):
-        if context.matches:
-            types = all([type(res) == self.SRE_TYPE for res in context.matches])
-            num = len(context.matches) == 2
-            self.test_flag = types and num
-
-    def test_basic(self, dp, prefixmessage):
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'], self.callback_basic)
+    def test_basic(self, dp, prefix, command):
+        """Test the basic expected response from a prefix handler"""
+        handler = self.make_default_handler()
         dp.add_handler(handler)
+        text = prefix + command
 
-        dp.process_update(Update(0, prefixmessage))
-        assert self.test_flag
+        assert self.response(dp, make_message_update(text))
+        assert not is_match(handler, make_message_update(command))
+        assert not is_match(handler, make_message_update(prefix + 'notacommand'))
+        assert not is_match(handler, make_command_update('not {} at start'.format(text)))
 
-        prefixmessage.text = 'test'
-        check = handler.check_update(Update(0, prefixmessage))
-        assert check is None or check is False
+    def test_single_multi_prefixes_commands(self, prefixes, commands, prefix_message_update):
+        """Test various combinations of prefixes and commands"""
+        handler = self.make_default_handler()
+        result = is_match(handler, prefix_message_update)
+        expected = prefix_message_update.message.text in combinations(prefixes, commands)
+        return result == expected
 
-        prefixmessage.text = '#nocom'
-        check = handler.check_update(Update(0, prefixmessage))
-        assert check is None or check is False
+    def test_edited(self, prefix_message):
+        handler_edited = self.make_default_handler()
+        handler_no_edited = self.make_default_handler(filters=~Filters.update.edited_message)
+        self._test_edited(prefix_message, handler_edited, handler_no_edited)
 
-        message.text = 'not !test at start'
-        check = handler.check_update(Update(0, message))
-        assert check is None or check is False
+    def test_with_filter(self, prefix_message_text):
+        handler = self.make_default_handler(filters=Filters.group)
+        text = prefix_message_text
+        assert is_match(handler, make_message_update(text, chat=Chat(-23, Chat.GROUP)))
+        assert not is_match(handler, make_message_update(text, chat=Chat(23, Chat.PRIVATE)))
 
-    def test_single_prefix_single_command(self, prefixmessage):
-        handler = PrefixHandler('!', 'test', self.callback_basic)
-
-        check = handler.check_update(Update(0, prefixmessage))
-        if prefixmessage.text in ['!test']:
-            assert check is not None and check is not False
-        else:
-            assert check is None or check is False
-
-    def test_single_prefix_multi_command(self, prefixmessage):
-        handler = PrefixHandler('!', ['test', 'help'], self.callback_basic)
-
-        check = handler.check_update(Update(0, prefixmessage))
-        if prefixmessage.text in ['!test', '!help']:
-            assert check is not None and check is not False
-        else:
-            assert check is None or check is False
-
-    def test_multi_prefix_single_command(self, prefixmessage):
-        handler = PrefixHandler(['!', '#'], 'test', self.callback_basic)
-
-        check = handler.check_update(Update(0, prefixmessage))
-        if prefixmessage.text in ['!test', '#test']:
-            assert check is not None and check is not False
-        else:
-            assert check is None or check is False
-
-    def test_no_edited(self, prefixmessage):
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'], self.callback_basic)
-        check = handler.check_update(Update(0, prefixmessage))
-        assert check is not None and check is not False
-
-        check = handler.check_update(Update(0, edited_message=prefixmessage))
-        assert check is not None and check is not False
-
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'], self.callback_basic,
-                                filters=~Filters.update.edited_message)
-        check = handler.check_update(Update(0, prefixmessage))
-        assert check is not None and check is not False
-
-        check = handler.check_update(Update(0, edited_message=prefixmessage))
-        assert check is None or check is False
-
-    def test_with_filter(self, prefixmessage):
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'], self.callback_basic,
-                                filters=Filters.group)
-
-        prefixmessage.chat = Chat(-23, 'group')
-        check = handler.check_update(Update(0, prefixmessage))
-        assert check is not None and check is not False
-
-        prefixmessage.chat = Chat(23, 'private')
-        check = handler.check_update(Update(0, prefixmessage))
-        assert check is None or check is False
-
-    def test_pass_args(self, dp, prefixmessage):
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'], self.ch_callback_args,
-                                pass_args=True)
+    def test_pass_args(self, dp, prefix_message):
+        handler = self.make_default_handler(self.ch_callback_args, pass_args=True)
         dp.add_handler(handler)
+        assert self.response(dp, make_message_update(prefix_message))
 
-        dp.process_update(Update(0, message=prefixmessage))
-        assert self.test_flag
+        update_with_args = make_message_update(prefix_message.text + ' one two')
+        assert self.response(dp, update_with_args)
 
-        self.test_flag = False
-        prefixmessage.text += ' one two'
-        dp.process_update(Update(0, message=prefixmessage))
-        assert self.test_flag
-
-    def test_pass_user_or_chat_data(self, dp, prefixmessage):
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'], self.callback_data_1,
-                                pass_user_data=True)
+    @pytest.mark.parametrize('pass_keyword', BaseTest.PASS_KEYWORDS)
+    def test_pass_data(self, dp, pass_combination, prefix_message_update, pass_keyword):
+        """Assert that callbacks receive data iff its corresponding ``pass_*`` kwarg is enabled"""
+        handler = self.make_default_handler(self.make_callback_for(pass_keyword),
+                                            **pass_combination)
         dp.add_handler(handler)
-
-        dp.process_update(Update(0, message=prefixmessage))
-        assert self.test_flag
-
-        dp.remove_handler(handler)
-        self.test_flag = False
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'], self.callback_data_1,
-                                pass_chat_data=True)
-        dp.add_handler(handler)
-        dp.process_update(Update(0, message=prefixmessage))
-        assert self.test_flag
-
-        dp.remove_handler(handler)
-        self.test_flag = False
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'], self.callback_data_2,
-                                pass_chat_data=True, pass_user_data=True)
-        dp.add_handler(handler)
-        dp.process_update(Update(0, message=prefixmessage))
-        assert self.test_flag
-
-    def test_pass_job_or_update_queue(self, dp, prefixmessage):
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'], self.callback_queue_1,
-                                pass_job_queue=True)
-        dp.add_handler(handler)
-
-        dp.process_update(Update(0, message=prefixmessage))
-        assert self.test_flag
-
-        dp.remove_handler(handler)
-        self.test_flag = False
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'], self.callback_queue_1,
-                                pass_update_queue=True)
-        dp.add_handler(handler)
-        dp.process_update(Update(0, message=prefixmessage))
-        assert self.test_flag
-
-        dp.remove_handler(handler)
-        self.test_flag = False
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'], self.callback_queue_2,
-                                pass_job_queue=True, pass_update_queue=True)
-        dp.add_handler(handler)
-        dp.process_update(Update(0, message=prefixmessage))
-        assert self.test_flag
+        assert self.response(dp, prefix_message_update) \
+            == pass_combination.get(pass_keyword, False)
 
     def test_other_update_types(self, false_update):
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'], self.callback_basic)
-        check = handler.check_update(false_update)
-        assert check is None or check is False
+        handler = self.make_default_handler()
+        assert not is_match(handler, false_update)
 
-    def test_filters_for_wrong_command(self, prefixmessage):
+    def test_filters_for_wrong_command(self, mock_filter):
         """Filters should not be executed if the command does not match the handler"""
+        handler = self.make_default_handler(filters=mock_filter)
+        assert not is_match(handler, make_message_update('/test'))
+        assert not mock_filter.tested
 
-        class TestFilter(BaseFilter):
-            def __init__(self):
-                self.tested = False
-
-            def filter(self, message):
-                self.tested = True
-
-        test_filter = TestFilter()
-
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'], self.callback_basic,
-                                filters=test_filter)
-
-        prefixmessage.text = '/star'
-
-        check = handler.check_update(Update(0, message=prefixmessage))
-        assert check is None or check is False
-
-        assert not test_filter.tested
-
-    def test_context(self, cdp, prefixmessage):
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'], self.callback_context)
+    def test_context(self, cdp, prefix_message_update):
+        handler = self.make_default_handler(self.callback_context)
         cdp.add_handler(handler)
+        assert self.response(cdp, prefix_message_update)
 
-        cdp.process_update(Update(0, prefixmessage))
-        assert self.test_flag
+    def test_context_args(self, cdp, prefix_message_text):
+        handler = self.make_default_handler(self.callback_context_args)
+        self._test_context_args_or_regex(cdp, handler, prefix_message_text)
 
-    def test_context_args(self, cdp, prefixmessage):
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'],
-                                self.callback_context_args)
-        cdp.add_handler(handler)
+    def test_context_regex(self, cdp, prefix_message_text):
+        handler = self.make_default_handler(self.callback_context_regex1,
+                                            filters=Filters.regex('one two'))
+        self._test_context_args_or_regex(cdp, handler, prefix_message_text)
 
-        cdp.process_update(Update(0, prefixmessage))
-        assert not self.test_flag
-
-        prefixmessage.text += ' one two'
-        cdp.process_update(Update(0, prefixmessage))
-        assert self.test_flag
-
-    def test_context_regex(self, cdp, prefixmessage):
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'],
-                                self.callback_context_regex1, Filters.regex('one two'))
-        cdp.add_handler(handler)
-
-        cdp.process_update(Update(0, prefixmessage))
-        assert not self.test_flag
-
-        prefixmessage.text += ' one two'
-        cdp.process_update(Update(0, prefixmessage))
-        assert self.test_flag
-
-    def test_context_multiple_regex(self, cdp, prefixmessage):
-        handler = PrefixHandler(['!', '#', 'mytrig-'], ['help', 'test'],
-                                self.callback_context_regex2,
-                                Filters.regex('one') & Filters.regex('two'))
-        cdp.add_handler(handler)
-
-        cdp.process_update(Update(0, prefixmessage))
-        assert not self.test_flag
-
-        prefixmessage.text += ' one two'
-        cdp.process_update(Update(0, prefixmessage))
-        assert self.test_flag
+    def test_context_multiple_regex(self, cdp, prefix_message_text):
+        handler = self.make_default_handler(self.callback_context_regex2,
+                                            filters=Filters.regex('one') & Filters.regex(
+                                                'two'))
+        self._test_context_args_or_regex(cdp, handler, prefix_message_text)

tests/test_conversationhandler.py

@@ -43,6 +43,10 @@ class TestConversationHandler(object):
     # and then we can start coding!
     END, THIRSTY, BREWING, DRINKING, CODING = range(-1, 4)
 
+    # Drinking state definitions (nested)
+    # At first we're holding the cup.  Then we sip coffee, and last we swallow it
+    HOLDING, SIPPING, SWALLOWING, REPLENISHING, STOPPING = map(chr, range(ord('a'), ord('f')))
+
     current_state, entry_points, states, fallbacks = None, None, None, None
     group = Chat(0, Chat.GROUP)
     second_group = Chat(1, Chat.GROUP)
@@ -69,6 +73,43 @@ class TestConversationHandler(object):
         self.fallbacks = [CommandHandler('eat', self.start)]
         self.is_timeout = False
 
+        # for nesting tests
+        self.nested_states = {
+            self.THIRSTY: [CommandHandler('brew', self.brew), CommandHandler('wait', self.start)],
+            self.BREWING: [CommandHandler('pourCoffee', self.drink)],
+            self.CODING: [
+                CommandHandler('keepCoding', self.code),
+                CommandHandler('gettingThirsty', self.start),
+                CommandHandler('drinkMore', self.drink)
+            ],
+        }
+        self.drinking_entry_points = [CommandHandler('hold', self.hold)]
+        self.drinking_states = {
+            self.HOLDING: [CommandHandler('sip', self.sip)],
+            self.SIPPING: [CommandHandler('swallow', self.swallow)],
+            self.SWALLOWING: [CommandHandler('hold', self.hold)]
+        }
+        self.drinking_fallbacks = [CommandHandler('replenish', self.replenish),
+                                   CommandHandler('stop', self.stop),
+                                   CommandHandler('end', self.end),
+                                   CommandHandler('startCoding', self.code),
+                                   CommandHandler('drinkMore', self.drink)]
+        self.drinking_entry_points.extend(self.drinking_fallbacks)
+
+        # Map nested states to parent states:
+        self.drinking_map_to_parent = {
+            # Option 1 - Map a fictional internal state to an external parent state
+            self.REPLENISHING: self.BREWING,
+            # Option 2 - Map a fictional internal state to the END state on the parent
+            self.STOPPING: self.END,
+            # Option 3 - Map the internal END state to an external parent state
+            self.END: self.CODING,
+            # Option 4 - Map an external state to the same external parent state
+            self.CODING: self.CODING,
+            # Option 5 - Map an external state to the internal entry point
+            self.DRINKING: self.DRINKING
+        }
+
     # State handlers
     def _set_state(self, update, state):
         self.current_state[update.message.from_user.id] = state
@@ -103,6 +144,23 @@ class TestConversationHandler(object):
     def passout2(self, bot, update):
         self.is_timeout = True
 
+    # Drinking actions (nested)
+
+    def hold(self, bot, update):
+        return self._set_state(update, self.HOLDING)
+
+    def sip(self, bot, update):
+        return self._set_state(update, self.SIPPING)
+
+    def swallow(self, bot, update):
+        return self._set_state(update, self.SWALLOWING)
+
+    def replenish(self, bot, update):
+        return self._set_state(update, self.REPLENISHING)
+
+    def stop(self, bot, update):
+        return self._set_state(update, self.STOPPING)
+
     # Tests
     def test_per_all_false(self):
         with pytest.raises(ValueError, match="can't all be 'False'"):
@@ -609,3 +667,108 @@ class TestConversationHandler(object):
             "If 'per_chat=True', 'InlineQueryHandler' can not be used,"
             " since inline queries have no chat context."
         )
+
+    def test_nested_conversation_handler(self, dp, bot, user1, user2):
+        self.nested_states[self.DRINKING] = [ConversationHandler(
+                                             entry_points=self.drinking_entry_points,
+                                             states=self.drinking_states,
+                                             fallbacks=self.drinking_fallbacks,
+                                             map_to_parent=self.drinking_map_to_parent)]
+        handler = ConversationHandler(entry_points=self.entry_points,
+                                      states=self.nested_states,
+                                      fallbacks=self.fallbacks)
+        dp.add_handler(handler)
+
+        # User one, starts the state machine.
+        message = Message(0, user1, None, self.group, text='/start', bot=bot,
+                          entities=[MessageEntity(type=MessageEntity.BOT_COMMAND,
+                                                  offset=0, length=len('/start'))])
+        dp.process_update(Update(update_id=0, message=message))
+        assert self.current_state[user1.id] == self.THIRSTY
+
+        # The user is thirsty and wants to brew coffee.
+        message.text = '/brew'
+        message.entities[0].length = len('/brew')
+        dp.process_update(Update(update_id=0, message=message))
+        assert self.current_state[user1.id] == self.BREWING
+
+        # Lets pour some coffee.
+        message.text = '/pourCoffee'
+        message.entities[0].length = len('/pourCoffee')
+        dp.process_update(Update(update_id=0, message=message))
+        assert self.current_state[user1.id] == self.DRINKING
+
+        # The user is holding the cup
+        message.text = '/hold'
+        message.entities[0].length = len('/hold')
+        dp.process_update(Update(update_id=0, message=message))
+        assert self.current_state[user1.id] == self.HOLDING
+
+        # The user is sipping coffee
+        message.text = '/sip'
+        message.entities[0].length = len('/sip')
+        dp.process_update(Update(update_id=0, message=message))
+        assert self.current_state[user1.id] == self.SIPPING
+
+        # The user is swallowing
+        message.text = '/swallow'
+        message.entities[0].length = len('/swallow')
+        dp.process_update(Update(update_id=0, message=message))
+        assert self.current_state[user1.id] == self.SWALLOWING
+
+        # The user is holding the cup again
+        message.text = '/hold'
+        message.entities[0].length = len('/hold')
+        dp.process_update(Update(update_id=0, message=message))
+        assert self.current_state[user1.id] == self.HOLDING
+
+        # The user wants to replenish the coffee supply
+        message.text = '/replenish'
+        message.entities[0].length = len('/replenish')
+        dp.process_update(Update(update_id=0, message=message))
+        assert self.current_state[user1.id] == self.REPLENISHING
+        assert handler.conversations[(0, user1.id)] == self.BREWING
+
+        # The user wants to drink their coffee again
+        message.text = '/pourCoffee'
+        message.entities[0].length = len('/pourCoffee')
+        dp.process_update(Update(update_id=0, message=message))
+        assert self.current_state[user1.id] == self.DRINKING
+
+        # The user is now ready to start coding
+        message.text = '/startCoding'
+        message.entities[0].length = len('/startCoding')
+        dp.process_update(Update(update_id=0, message=message))
+        assert self.current_state[user1.id] == self.CODING
+
+        # The user decides it's time to drink again
+        message.text = '/drinkMore'
+        message.entities[0].length = len('/drinkMore')
+        dp.process_update(Update(update_id=0, message=message))
+        assert self.current_state[user1.id] == self.DRINKING
+
+        # The user is holding their cup
+        message.text = '/hold'
+        message.entities[0].length = len('/hold')
+        dp.process_update(Update(update_id=0, message=message))
+        assert self.current_state[user1.id] == self.HOLDING
+
+        # The user wants to end with the drinking and go back to coding
+        message.text = '/end'
+        message.entities[0].length = len('/end')
+        dp.process_update(Update(update_id=0, message=message))
+        assert self.current_state[user1.id] == self.END
+        assert handler.conversations[(0, user1.id)] == self.CODING
+
+        # The user wants to drink once more
+        message.text = '/drinkMore'
+        message.entities[0].length = len('/drinkMore')
+        dp.process_update(Update(update_id=0, message=message))
+        assert self.current_state[user1.id] == self.DRINKING
+
+        # The user wants to stop altogether
+        message.text = '/stop'
+        message.entities[0].length = len('/stop')
+        dp.process_update(Update(update_id=0, message=message))
+        assert self.current_state[user1.id] == self.STOPPING
+        assert handler.conversations.get((0, user1.id)) is None