Fix spec helpers for callback queries

Collect all api helper-methods in Client::ApiHelper module.
Add bin/fetch-telegram-methods to update methods list from website.

.gitignore

@@ -1,9 +1,12 @@
 /.bundle/
 /.yardoc
 /Gemfile.lock
+/gemfiles/*.lock
+/gemfiles/.bundle
 /_yardoc/
 /coverage/
 /doc/
 /pkg/
 /spec/reports/
+/log/
 /tmp/

.rubocop.yml

@@ -1,29 +1,52 @@
 Rails: {Enabled: true}
 
-Style/Alias: {Enabled: false}
-Style/AlignParameters:
+Layout/AlignParameters:
   # Disable, till rubocop supports combination of styles.
   # Use one of this styles where appropriate, keep it clean, compact and readable.
   Enabled: false
   # EnforcedStyle:
   # - with_first_parameter
   # - with_fixed_indentation
+
+# Breaks
+#
+#   I18n.t(key,
+#     param: val,
+#     # ...
+#   )
+Layout/ClosingParenthesisIndentation: {Enabled: false}
+Layout/DotPosition: {EnforcedStyle: trailing}
+Layout/FirstParameterIndentation: {EnforcedStyle: consistent}
+# Same as Layout/ClosingParenthesisIndentation
+Layout/MultilineMethodCallBraceLayout: {Enabled: false}
+Layout/MultilineMethodCallIndentation: {EnforcedStyle: indented}
+Layout/MultilineOperationIndentation: {EnforcedStyle: indented}
+Layout/SpaceInsideHashLiteralBraces: {EnforcedStyle: no_space}
+
+# Offences named scopes and `expect {}.to change {}`.
+Lint/AmbiguousBlockAssociation: {Enabled: false}
+
+Naming/PredicateName: {Enabled: false}
+Naming/VariableNumber: {EnforcedStyle: snake_case}
+
+Style/Alias: {Enabled: false}
 Style/AndOr: {EnforcedStyle: conditionals}
-Style/ClosingParenthesisIndentation: {Enabled: false}
 Style/Documentation: {Enabled: false}
-Style/DotPosition: {EnforcedStyle: trailing}
-Style/FirstParameterIndentation: {EnforcedStyle: consistent}
 Style/IfUnlessModifier: {Enabled: false}
+
+# Consistent to other definitions.
+Style/EmptyMethod: {EnforcedStyle: expanded}
+
 Style/ModuleFunction: {Enabled: false}
-Style/MultilineOperationIndentation: {EnforcedStyle: indented}
 Style/NestedParenthesizedCalls: {Enabled: false}
-Style/PredicateName: {Enabled: false}
 Style/SignalException: {EnforcedStyle: only_raise}
-Style/SpaceInsideHashLiteralBraces: {EnforcedStyle: no_space}
 Style/TrailingCommaInArguments: {Enabled: false}
 Style/TrailingCommaInLiteral: {EnforcedStyleForMultiline: comma}
 
 Metrics/AbcSize: {Max: 21}
+# Other metrics are just enough.
+# This one offences all specs, routes and some initializers.
+Metrics/BlockLength: {Enabled: false}
 Metrics/LineLength: {Max: 100}
 Metrics/MethodLength: {Max: 30}
 Metrics/CyclomaticComplexity: {Max: 8}

.travis.yml

@@ -2,8 +2,9 @@ language: ruby
 cache: bundler
 rvm:
   - 2.2.3
-env:
-  - RAILS=4
-  - RAILS=5
+gemfile:
+  - gemfiles/rails_42.gemfile
+  - gemfiles/rails_50.gemfile
+  - gemfiles/rails_51.gemfile
 notifications:
   email: false

Appraisals

@@ -0,0 +1,14 @@
+appraise 'rails-51' do
+  gem 'actionpack', '~> 5.1'
+  gem 'railties', '~> 5.1'
+end
+
+appraise 'rails-50' do
+  gem 'actionpack', '~> 5.0'
+  gem 'railties', '~> 5.0'
+end
+
+appraise 'rails-42' do
+  gem 'actionpack', '~> 4.2'
+  gem 'railties', '~> 4.2'
+end

CHANGELOG.md

@@ -1,3 +1,69 @@
+# Unreleased
+
+# 0.12.4
+
+- Fix spec helpers for callback queries.
+
+# 0.12.3
+
+- New methods from Bot API v3.5
+- Collect all api helper-methods in Client::ApiHelper module.
+- Add `bin/fetch-telegram-methods` to update API methods list from website.
+
+# 0.12.1
+
+- Fix `set_webhook` rake task for async bots with self-issued certificates.
+- Make `#session` raise error when store is not configured,
+  don't use Rails.cache as fallback for session_store.
+- Allow use different sessions for MessageContext.
+
+# 0.12.0
+
+- New API methods and payload types (up to Bot API 3.2).
+- Fix rails 5.1.x support.
+- RSpec context for callback_query updates.
+- `edit_message` helper.
+- ClientStub saves and returns token. Fixes testing multiple bots.
+- Raise descriptive error when accessing not-configured bot.
+
+# 0.11.3
+
+- Release dependencies for Rails 5.1.
+
+# 0.11.2
+
+- Rails 5.1 deep symbolized secrets support.
+
+# 0.11.1
+
+- Fixed poller for typed response.
+
+# 0.11.0
+
+- Remove Bot::StaleChat in favor of Bot::Forbidden, as Telegram adds more
+  and more new descriptions.
+  Please open an issue if you face a problem.
+
+# 0.10.2
+
+- Support `(edited_)channel_post` updates.
+- New methods from 2.3, 2.3.1 API updates.
+
+# 0.10.0
+
+- Integration helpers for RSpec.
+- Fix for ruby 2.2.0 bug by @bob-frost.
+
+# 0.9.0
+
+- Async API requests.
+- One more description for StaleChat error.
+- edit_message_* methods.
+- API methods from 2016-10-03 update
+- Fix typo in module name: CallbackQueyContext -> CallbackQueryContext.
+- Take `chat` from `message` for callback queries
+- RSpec matchers.
+
 # 0.8.0
 
 - Fixed `#reply_with`, now it sets `reply_to_message_id` as it's supposed to.

Gemfile

@@ -1,24 +1,20 @@
 source 'https://rubygems.org'
 gemspec
 
-case ENV['RAILS']
-when '5'
-  gem 'actionpack', '5.0.0.rc1'
-when '4'
-  gem 'actionpack', '~> 4.2'
-end
-
 group :development do
-  gem 'sdoc', '~> 0.4.1'
+  gem 'appraisal', '~> 2.2'
+
   gem 'pry', '~> 0.10.1'
   gem 'pry-byebug', '~> 3.2.0'
+  gem 'sdoc', '~> 0.4.1'
 
-  gem 'telegram-bot-types', '~> 0.2.0'
+  gem 'telegram-bot-types', '~> 0.3.0'
 
-  gem 'rspec', '~> 3.3.0'
+  gem 'rspec', '~> 3.5.0'
   gem 'rspec-its', '~> 1.1.0'
+  gem 'rspec-rails', '~> 3.5.0'
 
-  gem 'rubocop', '~> 0.37.0'
+  gem 'rubocop', '~> 0.51.0'
 
   gem 'coveralls', '~> 0.8.2', require: false
 end

README.md

@@ -4,23 +4,31 @@
 [![Code Climate](https://codeclimate.com/github/telegram-bot-rb/telegram-bot/badges/gpa.svg)](https://codeclimate.com/github/telegram-bot-rb/telegram-bot)
 [![Build Status](https://travis-ci.org/telegram-bot-rb/telegram-bot.svg)](https://travis-ci.org/telegram-bot-rb/telegram-bot)
 
-Tools for developing bot for Telegram. Best used with Rails, but can be be used in
-standalone app. Supposed to be used in webhook-mode in production, and poller-mode
+Tools for developing Telegram bots. Best used with Rails, but can be used in
+[standalone app](https://github.com/telegram-bot-rb/telegram-bot/wiki/Not-rails-application).
+Supposed to be used in webhook-mode in production, and poller-mode
 in development, but you can use poller in production if you want.
 
 Package contains:
 
 - Ligthweight client for bot API (with fast and thread-safe
   [httpclient](https://github.com/nahi/httpclient) under the hood).
-- Controller with message parser. Allows to write separate methods for each command.
+- Controller with message parser: define methods for commands, not `case` branches.
 - Middleware and routes helpers for production env.
 - Poller with automatic source-reloader for development env.
 - Rake tasks to update webhook urls.
+- __[Async mode](#async-mode)__ for Telegram and/or Botan API.
+  Let the queue adapter handle network errors!
 
 Here is sample [telegram_bot_app](https://github.com/telegram-bot-rb/telegram_bot_app)
 with session, keyboards and inline queries.
 Run it on your local machine in 1 minute!
 
+And here is [app template](https://github.com/telegram-bot-rb/rails_template)
+to generate clean app in seconds.
+
+Examples and cookbook in [wiki](https://github.com/telegram-bot-rb/telegram-bot/wiki).
+
 ## Installation
 
 Add this line to your application's Gemfile:
@@ -37,51 +45,70 @@ Or install it yourself as:
 
     $ gem install telegram-bot
 
+Require if necessary:
+
+```ruby
+require 'telegram/bot'
+```
+
 ## Usage
 
-### Configuration
+### Configuration in Rails app
 
 Add `telegram` section into `secrets.yml`:
 
 ```yml
-telegram:
-  bots:
-    # just set the token
-    chat: TOKEN_1
-    # or add username to support commands with mentions (/help@ChatBot)
-    auction:
-      token: TOKEN_2
-      username: ChatBot
+development:
+  telegram:
+    # Single bot can be specified like this
+    bot: TOKEN
+    # or
+    bot:
+      token: TOKEN
+      username: SomeBot
 
-  # Single bot can be specified like this
-  bot: TOKEN
-  # or
-  bot:
-    token: TOKEN
-    username: SomeBot
+    # For multiple bots in single app use hash of `internal_bot_id => settings`
+    bots:
+      # just set the bot token
+      chat: TOKEN_1
+      # or add username to support commands with mentions (/help@ChatBot)
+      auction:
+        token: TOKEN_2
+        username: ChatBot
 ```
 
-### Client
-
 From now clients will be accessible with `Telegram.bots[:chat]` or `Telegram.bots[:auction]`.
 Single bot can be accessed with `Telegram.bot` or `Telegram.bots[:default]`.
 
-You can create clients manually with `Telegram::Bot::Client.new(token, username)`.
+### Client
+
+Client is instantiated with `Telegram::Bot::Client.new(token, username)`.
 Username is optional and used only to parse commands with mentions.
 
 There is `request(path_suffix, body)` method to perform any query.
-And there are also shortcuts for available queries in underscored style
-(`answer_inline_query` instead of `answerInlineQuery`).
-All this methods just post given params to specific URL.
+And there are shortcuts for all available requests in underscored style
+(`answer_inline_query(params)` instead of `answerInlineQuery`).
 
 ```ruby
 bot.request(:getMe) or bot.get_me
 bot.request(:getupdates, offset: 1) or bot.get_updates(offset: 1)
-bot.send_message chat_id: chat_id, text: 'Test'
+bot.send_message(chat_id: chat_id, text: 'Test')
 ```
 
+There is no magic, they just pass params as is and set `path_suffix`.
+See [`Client`](https://github.com/telegram-bot-rb/telegram-bot/blob/master/lib/telegram/bot/client.rb)
+class for list of available methods. Please open PR or issue if it misses methods from
+new API versions.
+
+Any API request error will raise `Telegram::Bot::Error` with description in its message.
+Special `Telegram::Bot::Forbidden` is raised when bot can't post messages to the chat anymore.
+
+#### Typed responses
+
 By default client will return parsed json responses. You can enable
-response typecasting to virtus models using `telegram-bot-types` gem:
+response typecasting to virtus models using
+[`telegram-bot-types`](https://github.com/telegram-bot-rb/telegram-bot-types) gem:
+
 ```ruby
 # Add to your gemfile:
 gem 'telegram-bot-types', '~> x.x.x'
@@ -93,18 +120,23 @@ bot.extend Telegram::Bot::Client::TypedResponse
 bot.get_me.class # => Telegram::Bot::Types::User
 ```
 
-Any API request error will raise `Telegram::Bot::Error` with description in its message.
-Special `Telegram::Bot::StaleChat` is raised when bot can't post messages to the chat anymore.
-
 ### Controller
 
+Controller makes it easy to keep bot's code readable.
+It does nothing more than finding out action name for update and invoking it.
+So there is almost no overhead comparing to large `switch`, while you
+can represent actions as separate methods keeping source much more readable and supportable.
+
+New instance of controller is instantiated for each update.
+This way every update is processed in isolation from others.
+
 ```ruby
 class Telegram::WebhookController < Telegram::Bot::UpdatesController
   # use callbacks like in any other controllers
   around_action :with_locale
 
   # Every update can have one of: message, inline_query, chosen_inline_result,
-  # callback_query.
+  # callback_query, etc.
   # Define method with same name to respond to this updates.
   def message(message)
     # message can be also accessed via instance method
@@ -130,6 +162,7 @@ class Telegram::WebhookController < Telegram::Bot::UpdatesController
     # do_smth_with(data)
 
     # There are `chat` & `from` shortcut methods.
+    # For callback queries `chat` if taken from `message` when it's available.
     response = from ? "Hello #{from['username']}!" : 'Hi there!'
     # There is `respond_with` helper to set `chat_id` from received message:
     respond_with :message, text: response
@@ -153,6 +186,20 @@ class Telegram::WebhookController < Telegram::Bot::UpdatesController
 end
 ```
 
+#### Reply helpers
+
+There are helpers to respond for basic actions. They just set chat/message/query
+identifiers from update. See [`ReplyHelpers`](https://github.com/telegram-bot-rb/telegram-bot/blob/master/lib/telegram/bot/updates_controller/reply_helpers.rb) module for more information.
+Here are this methods signatures:
+
+```ruby
+def respond_with(type, params); end
+def reply_with(type, params); end
+def answer_inline_query(results, params = {}); end
+def answer_callback_query(text, params = {}); end
+def edit_message(type, params = {}); end
+```
+
 #### Optional typecasting
 
 You can enable typecasting of `update` with `telegram-bot-types` by including
@@ -170,35 +217,56 @@ end
 
 #### Session
 
-There is support for sessions using `ActiveSupport::Cache` stores.
+This API is very close to ActiveController's session API, but works different
+under the hood. Cookies can not be used to store session id or
+whole session (like CookieStore does). So it uses key-value store and `session_key`
+method to build identifier from update.
+
+Store can be one of numerous `ActiveSupport::Cache` stores.
+While `:file_store` is suitable for development and single-server deployments
+without heavy load, it doesn't scale well. Key-value databases with persistance
+like Redis are more appropriate for production use.
 
 ```ruby
-# configure store in env files:
+# In rails app store can be configured in env files:
 config.telegram_updates_controller.session_store = :redis_store, {expires_in: 1.month}
 
+# In other app it can be done for all controllers with:
+Telegram::Bot::UpdatesController.session_store = :redis_store, {expires_in: 1.month}
+# or for specific one:
+OneOfUpdatesController.session_store = :redis_store, {expires_in: 1.month}
+```
+
+Default session id is made from bot's username and `(from || chat)['id']`.
+It means that session will be the same for updates from user in every chat,
+and different for every user in the same group chat.
+To change this behavior you can override `session_key` method, or even
+define [multiple sessions](https://github.com/telegram-bot-rb/telegram-bot/wiki/Multiple-session-objects)
+in single controller. For details see `Session` module.
+
+```ruby
 class Telegram::WebhookController < Telegram::Bot::UpdatesController
   include Telegram::Bot::UpdatesController::Session
   # or just shortcut:
   use_session!
 
-  # You can override global config
+  # You can override global config for this controller.
   self.session_store = :file_store
 
   def write(text = nil, *)
     session[:text] = text
   end
 
-  def read
+  def read(*)
     respond_with :message, text: session[:text]
   end
 
   private
-  # By default it uses bot's username and user's id as a session key.
-  # Chat's id is used only when `from` field is empty.
-  # Override `session_key` method to change this behavior.
+
+  # In this case session will persist for user only in specific chat.
+  # Same user in other chat will have different session.
   def session_key
-    # In this case session will persist for user only in specific chat:
-    "#{bot.username}:#{chat['id']}:#{from['id']}"
+    "#{bot.username}:#{chat['id']}:#{from['id']}" if chat && from
   end
 end
 ```
@@ -238,77 +306,80 @@ class Telegram::WebhookController < Telegram::Bot::UpdatesController
   # This will call #rename like if it is called with message '/rename %text%'
   context_handler :rename
 
-  # If you have a lot of such methods you can use
+  # If you have a lot of such methods you can call this method
+  # to use context value as action name for all contexts which miss handlers:
   context_to_action!
-  # It'll use context value as action name for all contexts which miss handlers.
 end
 ```
 
-You can use `CallbackQueyContext` in the similar way to split `#callback_query` into
-several specific methods. It doesn't require session support, and takes context from
-data. If data has a prefix with colon like this `my_ctx:smth...` it'll call
-`my_ctx_callback_query('smth...')` when there is such action method. Otherwise
-it'll call `callback_query('my_ctx:smth...')` as usual.
+#### Callback queries
+
+You can include `CallbackQueryContext` module to split `#callback_query` into
+several methods. It doesn't require session support, and takes context from
+data: if data has a prefix with colon like this `my_ctx:smth...` it invokes
+`my_ctx_callback_query('smth...')` when such action method is defined. Otherwise
+it invokes `callback_query('my_ctx:smth...')` as usual.
+Callback queries without prefix stay untouched.
+
+```ruby
+# This one handles `set_value:%{something}`.
+def set_value_callback_query(new_value = nil, *)
+  save_this(value)
+  answer_callback_query('Saved!)
+end
+
+# And this one is for `make_cool:%{something}`
+def make_cool_callback_query(thing = nil, *)
+  do_it(thing)
+  answer_callback_query("#{thing} is cool now! Like a callback query context.") 
+end
+```
+
+### Routes in Rails app
+
+There is `telegram_webhooks` helper for rails app to define routes for webhooks.
+It defines routes at `telegram/#{bot.token}` and connects bots with controller.
+For more options see [examples in wiki](https://github.com/telegram-bot-rb/telegram-bot/wiki/Routes-helpers-in-details).
+
+```ruby
+# Create routes for all Telegram.bots using single controller:
+telegram_webhooks TelegramController
+
+# Use different controllers for each bot:
+telegram_webhooks chat: TelegramChatController,
+                  auction: TelegramAuctionController
+```
 
 #### Processesing updates
 
-To process update run:
+To process update with controller call `.dispatch(bot, update)` on it.
+There are several options to run it automatically:
+
+- Use webhooks with routes helper (described above).
+- Use `Telegram::Bot::Middleware` with rack ([example in wiki](https://github.com/telegram-bot-rb/telegram-bot/wiki/Not-rails-application)).
+- Use poller (described in the next section).
+
+To run action without update (ex., send notifications from jobs),
+you can call `#process` directly. In this case controller can be initialized 
+with `:from` and/or `:chat` options instead of `update` object:
 
 ```ruby
-ControllerClass.dispatch(bot, update)
-```
-
-There is also ability to run action without update:
-
-```ruby
-# Most likely you'll want to pass :from and :chat
 controller = ControllerClass.new(bot, from: telegram_user, chat: telegram_chat)
-controller.process(:help, *args)
+controller.process(:welcome, *args)
 ```
 
-### Routes
-
-Use `telegram_webhooks` helper to add routes. It will create routes for bots
-at "telegram/#{bot.token}" path.
-
-```ruby
-# Create routes for all Telegram.bots to use same controller:
-telegram_webhooks TelegramController
-
-# Or pass custom bots usin any of supported config options:
-telegram_webhooks TelegramController,
-                 bot,
-                 {token: token, username: username},
-                 other_bot_token
-
-# Use different controllers for each bot:
-telegram_webhooks bot => TelegramChatController,
-                  other_bot => TelegramAuctionController
-
-# telegram_webhooks creates named routes.
-# Route name depends on `Telegram.bots`.
-# When there is single bot it will use 'telegram_webhook'.
-# When there are it will use bot's key in the `Telegram.bots` as prefix
-# (eg. `chat_telegram_webhook`).
-# You can override this options or specify others:
-telegram_webhooks TelegramController, as: :my_webhook
-telegram_webhooks bot => [TelegramChatController, as: :chat_webhook],
-                  other_bot => TelegramAuctionController,
-                  admin_chat: TelegramAdminChatController
-```
-
-For Rack applications you can also use `Telegram::Bot::Middleware` or just
-call `.dispatch(bot, update)` on controller.
-
 ### Development & Debugging
 
-Use `rake telegram:bot:poller` to run poller. It'll automatically load
-changes without restart in development env. Optionally specify bot to run poller for
-with `BOT` envvar (`BOT=chat`).
+Use `rake telegram:bot:poller` to run poller in rails app. It automatically loads
+changes without restart in development env.
+Optionally pass bot id in `BOT` envvar (`BOT=chat`) to specify bot to run poller for.
 
-This task will not work if you don't use `telegram_webhooks`.
-You can run poller manually with
-`Telegram::Bot::UpdatesPoller.start(bot, controller_class)`.
+This task requires `telegram_webhooks` helper to be used as it connects bots with controller.
+To run poller in other cases use:
+
+```ruby
+Telegram::Bot::UpdatesPoller.start(bot, controller_class)
+```
 
 ### Testing
 
@@ -316,26 +387,73 @@ There is `Telegram::Bot::ClientStub` class to stub client for tests.
 Instead of performing API requests it stores them in `requests` hash.
 
 To stub all possible clients use `Telegram::Bot::ClientStub.stub_all!` before
-initializing clients. Most likely you'll want something like this:
+initializing clients. Here is template for RSpec:
 
 ```ruby
+# environments/test.rb
+# Make sure to run it before defining routes or accessing any bot in the app!
+Telegram.reset_bots
+Telegram::Bot::ClientStub.stub_all!
+
+# rails_helper.rb
 RSpec.configure do |config|
   # ...
-  Telegram.reset_bots
-  Telegram::Bot::ClientStub.stub_all!
   config.after { Telegram.bot.reset }
+  # or for multiple bots:
+  config.after { Telegram.bots.each_value(&:reset) }
   # ...
 end
 ```
 
-There are also some helpers for controller tests.
-Check out `telegram/bot/updates_controller/rspec_helpers` and
-`telegram/bot/updates_controller/testing`.
+There are integration and controller contexts for RSpec and some built-in matchers:
 
-### Deploying
+```ruby
+# spec/requests/telegram_webhooks_spec.rb
+require 'telegram/bot/rspec/integration'
 
-Use `rake telegram:bot:set_webhook` to update webhook url for all configured bots.
-Certificate can be specified with `CERT=path/to/cert`.
+RSpec.describe TelegramWebhooksController, :telegram_bot do
+  # for old rspec add:
+  # include_context 'telegram/bot/integration'
+
+  describe '#start' do
+    subject { -> { dispatch_command :start } }
+    it { should respond_with_message 'Hi there!' }
+  end
+
+  # There is context for callback queries with related matchers.
+  describe '#hey_callback_query', :callback_query do
+    let(:data) { "hey:#{name}" }
+    let(:name) { 'Joe' }
+    it { should answer_callback_query('Hey Joe') }
+    it { should edit_current_message :text, text: 'Done' }
+end
+
+# For controller specs use
+require 'telegram/bot/updates_controller/rspec_helpers'
+RSpec.describe TelegramWebhooksController, type: :telegram_bot_controller do
+  # for old rspec add:
+  # include_context 'telegram/bot/updates_controller'
+end
+
+# Matchers are available for custom specs:
+include Telegram::Bot::RSpec::ClientMatchers
+
+expect(&process_update).to send_telegram_message(bot, /msg regexp/, some: :option)
+expect(&process_update).
+  to make_telegram_request(bot, :sendMessage, hash_including(text: 'msg text'))
+```
+
+Place integration tests inside `spec/requests`
+when using RSpec's `infer_spec_type_from_file_location!`,
+or just add `type: :request` to `describe`.
+
+See sample app for more examples.
+
+### Deployment
+
+While webhooks-mode is prefered, poller still can be used in production.
+See [comparison and examples](https://github.com/telegram-bot-rb/telegram-bot/wiki/Deployment)
+for details.
 
 ### Botan.io metrics
 
@@ -352,11 +470,11 @@ or just add `botan` key in `secrets.yml`:
 Access to Botan client with `bot.botan`.
 Use `bot.botan.track(event, uid, payload)` to track events.
 
-There are some helpers for controllers in `Telegram::Bot::UpdatesController::Botan`:
+There are some helpers for controllers in `Telegram::Bot::Botan::ControllerHelpers`:
 
 ```ruby
 class Telegram::WebhookController < Telegram::Bot::UpdatesController
-  include Telegram::Bot::UpdatesController::Botan
+  include Telegram::Bot::Botan::ControllerHelpers
 
   # This will track with event: action_name & data: payload
   before_action :botan_track_action
@@ -373,10 +491,40 @@ end
 
 There is no stubbing for botan clients, so don't set botan token in tests.
 
+### Async mode
+
+There is built in support for async requests using ActiveJob. Without Rails
+you can implement your own worker class to handle such requests. This allows:
+
+- Process updates very fast, without waiting for telegram and botan responses.
+- Handle and retry network and other errors with queue adapter.
+- ???
+
+Instead of performing request instantly client serializes it, pushes to queue,
+and immediately return control back. The job is then fetched with a worker
+and real API request is performed. And this all is absolutely transparent for the app.
+
+To enable this mode add `async: true` to bot's and botan's config.
+For more information and custom configuration check out
+[docs](http://www.rubydoc.info/github/telegram-bot-rb/telegram-bot/master/Telegram/Bot/Async) or
+[source](https://github.com/telegram-bot-rb/telegram-bot/blob/master/lib/telegram/bot/async.rb).
+
+If you want async mode, but don't want to setup queue, know that Rails 5 are shipped
+with Async adapter by default, and there is
+[Sucker Punch](https://github.com/brandonhilkert/sucker_punch) for Rails 4.
+
+To disable async mode for the block of code use `bot.async(false) { bot.send_photo }`.
+Yes, it's threadsafe too.
+
+#### Limitations
+
+- Client will not return API response.
+- Sending files is not available in async mode, because they can not be serialized.
+
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies.
-Then, run `rake spec` to run the tests.
+Then, run `appraisal rake spec` to run the tests.
 You can also run `bin/console` for an interactive prompt that will allow you to experiment.
 
 To install this gem onto your local machine, run `bundle exec rake install`.
@@ -384,15 +532,7 @@ To release a new version, update the version number in `version.rb`,
 and then run `bundle exec rake release`, which will create a git tag for the version,
 push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
 
-### Different Rails versions
-
-To setup development for specific major Rails version use:
-
-```
-RAILS=5 bundle install
-# or
-RAILS=5 bundle update
-```
+Use `bin/fetch-telegram-methods` to update API methods list from Telegram website.
 
 ## Contributing
 

bin/fetch-telegram-methods

@@ -0,0 +1,41 @@
+#!/usr/bin/env ruby
+#
+# Fetch list of methods from Telegram docs.
+# Use it to update client.rb.
+
+require 'net/http'
+require 'nokogiri'
+
+DOCS_URL = 'https://core.telegram.org/bots/api'.freeze
+
+page_html = Net::HTTP.get(URI(DOCS_URL))
+doc = Nokogiri::HTML(page_html)
+
+# Select `h4`s, but use `h3`s to group them.
+headers = doc.css('h3, h4').
+  chunk_while { |_, x| x.name == 'h4' }.
+  map { |g| g.select { |x| x.name == 'h4' } }.
+  map { |g| g.map(&:text) }
+
+# Method starts with lowercase and does not have spaces.
+NOT_METHOD_REGEXP = /(\A[^a-z])|\s/
+
+# Filter method names.
+method_list = headers.
+  map { |g| g.reject { |x| x.match?(NOT_METHOD_REGEXP) } }.
+  reject(&:empty?)
+
+api_version = doc.text.match(/^(Bot API ([\d\.]+))\.?$/)
+
+result = ['# Generated with bin/fetch-telegram-methods']
+result << "# #{api_version[1]}" if api_version
+result << ''
+result << method_list.map { |g| g.join("\n") }.join("\n\n")
+result << ''
+result_txt = result.join("\n")
+
+puts result_txt
+
+API_METHODS_FILE = File.expand_path('../lib/telegram/bot/client/api_methods.txt', __dir__).freeze
+File.write(API_METHODS_FILE, result_txt)
+puts '', "Updated #{API_METHODS_FILE}"

bin/setup

@@ -3,6 +3,7 @@ set -euo pipefail
 IFS=$'\n\t'
 
 bundle install
+appraisal install
 bin/install_git_hooks
 
 # Do any other automated setup that you need to do here

gemfiles/rails_42.gemfile

@@ -0,0 +1,21 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "actionpack", "~> 4.2"
+gem "railties", "~> 4.2"
+
+group :development do
+  gem "appraisal", "~> 2.2"
+  gem "pry", "~> 0.10.1"
+  gem "pry-byebug", "~> 3.2.0"
+  gem "sdoc", "~> 0.4.1"
+  gem "telegram-bot-types", "~> 0.3.0"
+  gem "rspec", "~> 3.5.0"
+  gem "rspec-its", "~> 1.1.0"
+  gem "rspec-rails", "~> 3.5.0"
+  gem "rubocop", "~> 0.51.0"
+  gem "coveralls", "~> 0.8.2", require: false
+end
+
+gemspec path: "../"

gemfiles/rails_50.gemfile

@@ -0,0 +1,21 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "actionpack", "~> 5.0"
+gem "railties", "~> 5.0"
+
+group :development do
+  gem "appraisal", "~> 2.2"
+  gem "pry", "~> 0.10.1"
+  gem "pry-byebug", "~> 3.2.0"
+  gem "sdoc", "~> 0.4.1"
+  gem "telegram-bot-types", "~> 0.3.0"
+  gem "rspec", "~> 3.5.0"
+  gem "rspec-its", "~> 1.1.0"
+  gem "rspec-rails", "~> 3.5.0"
+  gem "rubocop", "~> 0.51.0"
+  gem "coveralls", "~> 0.8.2", require: false
+end
+
+gemspec path: "../"

gemfiles/rails_51.gemfile

@@ -0,0 +1,21 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "actionpack", "~> 5.1"
+gem "railties", "~> 5.1"
+
+group :development do
+  gem "appraisal", "~> 2.2"
+  gem "pry", "~> 0.10.1"
+  gem "pry-byebug", "~> 3.2.0"
+  gem "sdoc", "~> 0.4.1"
+  gem "telegram-bot-types", "~> 0.3.0"
+  gem "rspec", "~> 3.5.0"
+  gem "rspec-its", "~> 1.1.0"
+  gem "rspec-rails", "~> 3.5.0"
+  gem "rubocop", "~> 0.51.0"
+  gem "coveralls", "~> 0.8.2", require: false
+end
+
+gemspec path: "../"

lib/tasks/telegram-bot.rake

@@ -21,7 +21,7 @@ namespace :telegram do
         route_name = Telegram::Bot::RoutesHelper.route_name_for_bot(bot)
         url = routes.send("#{route_name}_url")
         puts "Setting webhook for #{key}..."
-        bot.set_webhook(url: url, certificate: cert)
+        bot.async(false) { bot.set_webhook(url: url, certificate: cert) }
       end
     end
   end

lib/telegram/bot.rb

@@ -6,30 +6,16 @@ module Telegram
   module Bot
     class Error < StandardError; end
     class NotFound < Error; end
+    class Forbidden < Error; end
 
-    # Error class for events when chat is not available anymore for bot.
-    # While Telegram has same error codes for different messages and there is no
-    # official docs for this error codes it uses `description` to
-    # check response.
-    class StaleChat < Error
-      DESCRIPTIONS = [
-        'bot was kicked',
-        "can't write to",
-        'group chat is deactivated',
-      ].freeze
-
-      class << self
-        def match_response?(response)
-          description = response['description'].to_s
-          DESCRIPTIONS.any? { |x| description[x] }
-        end
-      end
-    end
-
+    autoload :Async,              'telegram/bot/async'
     autoload :Botan,              'telegram/bot/botan'
     autoload :Client,             'telegram/bot/client'
     autoload :ClientStub,         'telegram/bot/client_stub'
+    autoload :DebugClient,        'telegram/bot/debug_client'
+    autoload :Initializers,       'telegram/bot/initializers'
     autoload :Middleware,         'telegram/bot/middleware'
+    autoload :RSpec,              'telegram/bot/rspec'
     autoload :UpdatesController,  'telegram/bot/updates_controller'
     autoload :UpdatesPoller,      'telegram/bot/updates_poller'
   end

lib/telegram/bot/async.rb

@@ -0,0 +1,162 @@
+module Telegram
+  module Bot
+    # Telegram & Botan clients can perform requests in async way with
+    # any job adapter (ActiveJob by default). Using Rails you don't need any
+    # additional configuration. However you may want to enable async requests
+    # by default with `async: true` in `secrets.yml`. Botan client doesn't inherit
+    # async setting from client and must be configured separately.
+    #
+    #   telegram:
+    #     bots:
+    #       chat_async:
+    #         token: secret
+    #         async: true # enable async mode for client
+    #         botan: botan_token # in this way botan will not be async
+    #         botan: # in this way - it's in async mode
+    #           token: botan_token
+    #           async: true
+    #
+    # Without Rails To start using async requests
+    # initialize client with `id` kwarg and make sure the client is
+    # accessible via `Teletgram.bots[id]` in job worker. Or just use
+    # `Telegram.bots_config=` for configuration.
+    #
+    # Being in async mode `#request` enqueues job instead to perform
+    # http request instead of performing it directly.
+    # Async behavior is controlled with `#async=` writer
+    # and can be enabled/disabled for the block with `#async`:
+    #
+    #   client = Telegram::Bot::Client.new(**config, async: true)
+    #   client.send_message(message)
+    #   client.async(false) { client.send_message(other_one) }
+    #
+    # `#async=` sets global value for all threads,
+    # while `#async(val, &block)` is thread-safe.
+    #
+    # It can be set with custom job class or classname. By default it defines
+    # job classes for every client class, inherited from ApplicationRecord, which
+    # can be accessed via `.default_async_job`. You can integrate it with any
+    # other job provider by defining a class with `.perform_later(bot_id, *args)`
+    # method. See Async::Job for implemetation.
+    module Async
+      # Used to track missing key in a hash in local variable.
+      MISSING_VALUE = Object.new.freeze
+
+      module Job
+        class << self
+          def included(base)
+            base.singleton_class.send :attr_accessor, :client_class
+          end
+        end
+
+        def perform(client_id, *args)
+          client = self.class.client_class.wrap(client_id.to_sym)
+          client.async(false) { client.request(*args) }
+        end
+      end
+
+      module ClassMethods
+        def default_async_job
+          @default_async_job ||= begin
+            begin
+              ApplicationJob
+            rescue NameError
+              raise 'Define ApplicationJob class or setup #async= with custom job class'
+            end
+            klass = Class.new(ApplicationJob) { include Job }
+            klass.client_class = self
+            const_set(:AsyncJob, klass)
+          end
+        end
+
+        # This is used in specs.
+        def default_async_job=(val)
+          @default_async_job = val
+          remove_const(:AsyncJob) if const_defined?(:AsyncJob, false)
+        end
+
+        # Prepares argments for async job. ActiveJob doesn't support
+        # Symbol in argumens. Also we can encode json bodies only once here,
+        # so it would not be unnecessarily serialized-deserialized.
+        #
+        # This is stub method, which returns input. Every client class
+        # must prepare args itself.
+        def prepare_async_args(*args)
+          args
+        end
+
+        # Returns default_async_job if `true` is given,
+        # treats String as a constant name, or bypasses any other values.
+        def prepare_async_val(val)
+          case val
+          when true then default_async_job
+          when String then Object.const_get(val)
+          else val
+          end
+        end
+      end
+
+      class << self
+        def prepended(base)
+          base.extend(ClassMethods)
+        end
+
+        # Transforms symbols to strings in hash values.
+        def prepare_hash(hash)
+          return hash unless hash.is_a?(Hash)
+          hash = hash.dup
+          hash.each { |key, val| hash[key] = val.to_s if val.is_a?(Symbol) }
+        end
+
+        # Thread-local hash to store async config for every client.
+        def thread_store
+          Thread.current[:telegram_bot_async] ||= {}
+        end
+      end
+
+      attr_reader :id
+
+      def initialize(*, id: nil, async: nil, **options)
+        @id = id
+        self.async = async
+        super
+      end
+
+      # Sets default async value for all threads.
+      # Uses `self.class.prepare_async_val` to prepare value.
+      def async=(val)
+        @async = self.class.prepare_async_val(val)
+      end
+
+      # Sets async value in a thread-safe way for the block.
+      # Uses `self.class.prepare_async_val` to prepare value.
+      #
+      # If no block is given returns previously set value or the global one,
+      # set by #async=.
+      def async(val = true)
+        thread_key = object_id
+        thread_store = Async.thread_store
+        return thread_store.fetch(thread_key) { @async } unless block_given?
+        begin
+          old_val = thread_store.fetch(thread_key) { MISSING_VALUE }
+          thread_store[thread_key] = self.class.prepare_async_val(val)
+          yield
+        ensure
+          if MISSING_VALUE == old_val
+            thread_store.delete(thread_key)
+          else
+            thread_store[thread_key] = old_val
+          end
+        end
+      end
+
+      # Uses job if #async is set.
+      def request(*args)
+        job_class = async
+        return super unless job_class
+        raise 'Can not enqueue job without client id' unless id
+        job_class.perform_later(id.to_s, *self.class.prepare_async_args(*args))
+      end
+    end
+  end
+end

lib/telegram/bot/botan.rb

@@ -3,26 +3,39 @@ module Telegram
     class Botan
       TRACK_URI = 'https://api.botan.io/track'.freeze
 
+      autoload :ClientHelpers, 'telegram/bot/botan/client_helpers'
+      autoload :ControllerHelpers, 'telegram/bot/botan/controller_helpers'
       class Error < Bot::Error; end
 
+      extend Initializers
+      prepend Async
       include DebugClient
 
+      class << self
+        def by_id(id)
+          Telegram.botans[id]
+        end
+
+        def prepare_async_args(method, uri, query = {}, body = nil)
+          [method.to_s, uri.to_s, Async.prepare_hash(query), body]
+        end
+      end
+
       attr_reader :client, :token
 
-      def initialize(token)
+      def initialize(token = nil, **options)
         @client = HTTPClient.new
-        @token = token
+        @token = token || options[:token]
       end
 
       def track(event, uid, payload = {})
-        res = http_request(
-          :post,
-          TRACK_URI,
-          {token: token, name: event, uid: uid},
-          payload.to_json,
-        )
+        request(:post, TRACK_URI, {name: event, uid: uid}, payload.to_json)
+      end
+
+      def request(method, uri, query = {}, body = nil)
+        res = http_request(method, uri, query.merge(token: token), body)
         status = res.status
-        return JSON.parse(res.body) if 300 > status
+        return JSON.parse(res.body) if status < 300
         result = JSON.parse(res.body) rescue nil # rubocop:disable RescueModifier
         err_msg = "#{res.reason}: #{result && result['info'] || '-'}"
         raise Error, err_msg
@@ -31,6 +44,10 @@ module Telegram
       def http_request(method, uri, query, body)
         client.request(method, uri, query, body)
       end
+
+      def inspect
+        "#<#{self.class.name}##{object_id}(#{@id})>"
+      end
     end
   end
 end

lib/telegram/bot/botan/client_helpers.rb

@@ -0,0 +1,15 @@
+module Telegram
+  module Bot
+    class Botan
+      # Helpers for botan.io metrics.
+      module ClientHelpers
+        attr_reader :botan
+
+        def initialize(*, botan: nil, **options)
+          super
+          @botan = Botan.wrap(botan, id: id) if botan
+        end
+      end
+    end
+  end
+end

lib/telegram/bot/botan/controller_helpers.rb

@@ -1,8 +1,8 @@
 module Telegram
   module Bot
-    class UpdatesController
+    class Botan
       # Helpers for botan.io metrics.
-      module Botan
+      module ControllerHelpers
         class MissingFrom < Error; end
 
         protected

lib/telegram/bot/client.rb

@@ -1,8 +1,5 @@
 require 'json'
 require 'httpclient'
-require 'active_support/core_ext/string/inflections'
-require 'active_support/core_ext/hash/keys'
-require 'telegram/bot/debug_client'
 
 module Telegram
   module Bot
@@ -10,23 +7,17 @@ module Telegram
       URL_TEMPLATE = 'https://api.telegram.org/bot%s/'.freeze
 
       autoload :TypedResponse, 'telegram/bot/client/typed_response'
+      extend Initializers
+      prepend Async
+      prepend Botan::ClientHelpers
       include DebugClient
 
+      require 'telegram/bot/client/api_helper'
+      include ApiHelper
+
       class << self
-        # Accepts different options to initialize bot.
-        def wrap(input)
-          case input
-          when self then input
-          when Array then input.map(&method(__callee__))
-          when Hash then
-            input = input.stringify_keys
-            new input['token'], input['username'], botan: input['botan']
-          when Symbol
-            Telegram.bots[input] or
-              raise "Bot #{input} not configured, check Telegram.bots_config."
-          else
-            new(input)
-          end
+        def by_id(id)
+          Telegram.bots[id]
         end
 
         # Prepend TypedResponse module.
@@ -41,61 +32,35 @@ module Telegram
             body[k] = val.to_json if val.is_a?(Hash) || val.is_a?(Array)
           end
         end
+
+        def prepare_async_args(action, body = {})
+          [action.to_s, Async.prepare_hash(prepare_body(body))]
+        end
       end
 
-      attr_reader :client, :token, :username, :base_uri, :botan
+      attr_reader :client, :token, :username, :base_uri
 
-      def initialize(token, username = nil, botan: nil)
+      def initialize(token = nil, username = nil, **options)
         @client = HTTPClient.new
-        @token = token
-        @username = username
-        @base_uri = format URL_TEMPLATE, token
-        @botan = Botan.new(botan) if botan
+        @token = token || options[:token]
+        @username = username || options[:username]
+        @base_uri = format URL_TEMPLATE, self.token
       end
 
-      def request(action, body = {}) # rubocop:disable PerceivedComplexity
+      def request(action, body = {})
         res = http_request("#{base_uri}#{action}", self.class.prepare_body(body))
         status = res.status
-        return JSON.parse(res.body) if 300 > status
+        return JSON.parse(res.body) if status < 300
         result = JSON.parse(res.body) rescue nil # rubocop:disable RescueModifier
-        err_msg = "#{res.reason}: #{result && result['description'] || '-'}"
+        err_msg = result && result['description'] || '-'
         if result
-          # NotFound is raised only for valid responses from Telegram
-          raise NotFound, err_msg if 404 == status
-          raise StaleChat, err_msg if StaleChat.match_response?(result)
+          # This errors are raised only for valid responses from Telegram
+          case status
+          when 403 then raise Forbidden, err_msg
+          when 404 then raise NotFound, err_msg
+          end
         end
-        raise Error, err_msg
-      end
-
-      %w(
-        answerCallbackQuery
-        answerInlineQuery
-        forwardMessage
-        getChat
-        getChatAdministrators
-        getChatMember
-        getChatMembersCount
-        getFile
-        getMe
-        getUpdates
-        getUserProfilePhotos
-        kickChatMember
-        leaveChat
-        sendAudio
-        sendChatAction
-        sendContact
-        sendDocument
-        sendLocation
-        sendMessage
-        sendPhoto
-        sendSticker
-        sendVenue
-        sendVideo
-        sendVoice
-        setWebhook
-        unbanChatMember
-      ).each do |method|
-        define_method(method.underscore) { |*args| request(method, *args) }
+        raise Error, "#{res.reason}: #{err_msg}"
       end
 
       # Endpoint for low-level request. For easy host highjacking & instrumentation.

lib/telegram/bot/client/api_helper.rb

@@ -0,0 +1,31 @@
+require 'active_support/core_ext/string/inflections'
+
+module Telegram
+  module Bot
+    class Client
+      module ApiHelper
+        METHODS_LIST_FILE = File.expand_path('../api_methods.txt', __FILE__)
+
+        class << self
+          def methods_list(file = METHODS_LIST_FILE)
+            File.read(file).lines.
+              map(&:strip).
+              reject { |x| x.empty? || x.start_with?('#') }
+          end
+
+          # Defines method with underscored name to post to specific endpoint:
+          #
+          #   define_method :getMe
+          #   # defines #get_me
+          def define_helpers(*list)
+            list.map(&:to_s).each do |method|
+              define_method(method.underscore) { |*args| request(method, *args) }
+            end
+          end
+        end
+
+        define_helpers(*methods_list)
+      end
+    end
+  end
+end

lib/telegram/bot/client/api_methods.txt

@@ -0,0 +1,68 @@
+# Generated with bin/fetch-telegram-methods
+# Bot API 3.5.
+
+getUpdates
+setWebhook
+deleteWebhook
+getWebhookInfo
+
+getMe
+sendMessage
+forwardMessage
+sendPhoto
+sendAudio
+sendDocument
+sendVideo
+sendVoice
+sendVideoNote
+sendMediaGroup
+sendLocation
+editMessageLiveLocation
+stopMessageLiveLocation
+sendVenue
+sendContact
+sendChatAction
+getUserProfilePhotos
+getFile
+kickChatMember
+unbanChatMember
+restrictChatMember
+promoteChatMember
+exportChatInviteLink
+setChatPhoto
+deleteChatPhoto
+setChatTitle
+setChatDescription
+pinChatMessage
+unpinChatMessage
+leaveChat
+getChat
+getChatAdministrators
+getChatMembersCount
+getChatMember
+setChatStickerSet
+deleteChatStickerSet
+answerCallbackQuery
+
+editMessageText
+editMessageCaption
+editMessageReplyMarkup
+deleteMessage
+
+sendSticker
+getStickerSet
+uploadStickerFile
+createNewStickerSet
+addStickerToSet
+setStickerPositionInSet
+deleteStickerFromSet
+
+answerInlineQuery
+
+sendInvoice
+answerShippingQuery
+answerPreCheckoutQuery
+
+sendGame
+setGameScore
+getGameHighScores

lib/telegram/bot/client_stub.rb

@@ -9,7 +9,7 @@ module Telegram
           if self == ClientStub || !ClientStub.stub_all?
             super
           else
-            ClientStub.new(args[1])
+            ClientStub.new(*args)
           end
         end
       end
@@ -34,8 +34,9 @@ module Telegram
         end
       end
 
-      def initialize(username = nil)
-        @username = username
+      def initialize(token = nil, username = nil, **options)
+        @token = token || options[:token]
+        @username = username || options[:username] || token
         reset
       end
 
@@ -43,7 +44,7 @@ module Telegram
         @requests = Hash.new { |h, k| h[k] = [] }
       end
 
-      def request(action, body)
+      def request(action, body = {})
         requests[action.to_sym] << body
       end
     end

lib/telegram/bot/config_methods.rb

@@ -1,5 +1,6 @@
 require 'active_support/core_ext/hash/keys'
 require 'active_support/core_ext/hash/transform_values'
+require 'active_support/core_ext/hash/indifferent_access'
 
 module Telegram
   module Bot
@@ -20,18 +21,29 @@ module Telegram
       def bot_poller_mode?
         return @bot_poller_mode if defined?(@bot_poller_mode)
         @bot_poller_mode = ENV.fetch('BOT_POLLER_MODE') do
-          Rails.env.development? if defined?(Rails)
+          Rails.env.development? if defined?(Rails.env)
         end
       end
 
       # Hash of bots made with bots_config.
       def bots
-        @bots ||= bots_config.transform_values(&Client.method(:wrap))
+        @bots ||= bots_config.each_with_object({}) do |(id, config), h|
+          h[id] = Client.wrap(config, id: id)
+        end
       end
 
       # Default bot.
       def bot
-        @bot ||= bots[:default]
+        @bot ||= bots.fetch(:default) do
+          raise 'Default bot is not configured.' \
+            ' Add :default to bots_config' \
+            ' or use telegram.bot/telegram.bots.default section in secrets.yml.'
+        end
+      end
+
+      # Hash of botan clients made from #bots.
+      def botans
+        @botans ||= bots.transform_values(&:botan)
       end
 
       # Returns config for .bots method. By default uses `telegram['bots']` section
@@ -39,12 +51,17 @@ module Telegram
       #
       # Can be overwritten with .bots_config=
       def bots_config
-        return @bots_config if @bots_config
-        telegram_config = Rails.application.secrets[:telegram]
-        (telegram_config['bots'] || {}).symbolize_keys.tap do |config|
-          default = telegram_config['bot']
-          config[:default] = default if default
-        end
+        @bots_config ||=
+          if defined?(Rails.application)
+            secrets = Rails.application.secrets.
+              fetch(:telegram, {}).with_indifferent_access
+            secrets.fetch(:bots, {}).symbolize_keys.tap do |config|
+              default = secrets[:bot]
+              config[:default] = default if default
+            end
+          else
+            {}
+          end
       end
 
       # Resets all cached bots and their configs.
@@ -52,6 +69,7 @@ module Telegram
         @bots = nil
         @bot = nil
         @bots_config = nil
+        @botans = nil
       end
     end
   end

lib/telegram/bot/initializers.rb

@@ -0,0 +1,21 @@
+require 'active_support/core_ext/hash/keys'
+
+module Telegram
+  module Bot
+    module Initializers
+      # Accepts different options to initialize bot.
+      def wrap(input, **options)
+        case input
+        when Symbol then by_id(input) or raise "#{name} #{input.inspect} not configured"
+        when self   then input
+        when Hash   then new(**input.symbolize_keys, **options)
+        else        new(input, **options)
+        end
+      end
+
+      def by_id(_id)
+        raise 'Not implemented'
+      end
+    end
+  end
+end

lib/telegram/bot/railtie.rb

@@ -18,7 +18,7 @@ module Telegram
 
         ActiveSupport.on_load('telegram.bot.updates_controller') do
           self.logger = options.logger || Rails.logger
-          self.session_store = options.session_store || Rails.cache
+          self.session_store = options.session_store if options.session_store
         end
       end
 

lib/telegram/bot/routes_helper.rb

@@ -20,7 +20,7 @@ module Telegram
         # Replaces colon with underscore so rails don't treat it as
         # route parameter.
         def escape_token(token)
-          token.tr(':', '_')
+          token && token.tr(':', '_')
         end
       end
 

lib/telegram/bot/rspec.rb

@@ -0,0 +1,7 @@
+module Telegram
+  module Bot
+    module RSpec
+      autoload :ClientMatchers, 'telegram/bot/rspec/client_matchers'
+    end
+  end
+end

lib/telegram/bot/rspec/client_matchers.rb

@@ -0,0 +1,151 @@
+module Telegram
+  module Bot
+    module RSpec
+      # Proxy that uses RSpec::Mocks::ArgListMatcher when it's available.
+      # Otherwise just performs `#==` match.
+      #
+      # Also allows to check argumets with custom block.
+      class ArgListMatcher
+        attr_reader :expected, :expected_proc
+
+        def initialize(*args, &block)
+          @expected_proc = block if block_given?
+          @expected =
+            if mocks_matcher?
+              ::RSpec::Mocks::ArgumentListMatcher.new(*args)
+            else
+              args
+            end
+        end
+
+        def args_match?(*actual)
+          if expected_proc
+            expected_proc[*actual]
+            true
+          elsif mocks_matcher?
+            expected.args_match?(*actual)
+          else
+            expected == actual
+          end
+        end
+
+        def args
+          mocks_matcher? ? expected.args : expected
+        end
+
+        def mocks_matcher?
+          defined?(::RSpec::Mocks::ArgumentListMatcher)
+        end
+
+        def to_s
+          if mocks_matcher?
+            expected.expected_args.inspect
+          elsif expected_proc
+            '(proc matcher)'
+          else
+            expected.inspect
+          end
+        end
+      end
+
+      # Matchers to test requests to Telegram API.
+      #
+      # Complex matchers requires `rspec-mocks` to be installed.
+      module ClientMatchers
+        class MakeTelegramRequest < ::RSpec::Matchers::BuiltIn::BaseMatcher
+          EXPECTATION_TYPES = {
+            exactly: :==,
+            at_most: :>=,
+            at_least: :<=,
+          }.freeze
+
+          attr_reader :performed_requests, :description
+
+          def initialize(bot, action, description: nil)
+            @bot = bot
+            @action = action
+            @description = description || "make #{action} telegram request"
+            exactly(1)
+          end
+
+          def matches?(proc) # rubocop:disable AbcSize
+            raise ArgumentError, 'matcher only supports block expectations' unless proc.is_a?(Proc)
+            original_requests_count = bot.requests[action].count
+            proc.call
+            @performed_requests = bot.requests[action].drop(original_requests_count)
+            @matching_requests_count = performed_requests.count do |request|
+              !arg_list_matcher || arg_list_matcher.args_match?(request)
+            end
+            expectation_method = EXPECTATION_TYPES[expectation_type]
+            expected_number.public_send(expectation_method, matching_requests_count)
+          end
+
+          def with(*args, &block)
+            @arg_list_matcher = ArgListMatcher.new(*args, &block)
+            self
+          end
+
+          EXPECTATION_TYPES.each_key do |type|
+            define_method type do |count|
+              @expectation_type = type
+              @expected_number = Integer(count)
+              self
+            end
+          end
+
+          def times
+            self
+          end
+
+          def failure_message
+            "expected to #{base_message}"
+          end
+
+          def failure_message_when_negated
+            "expected not to #{base_message}"
+          end
+
+          def supports_block_expectations?
+            true
+          end
+
+          private
+
+          attr_reader :bot, :action, :expectation_type, :expected_number,
+            :arg_list_matcher, :matching_requests_count
+
+          def base_message
+            "make #{expectation_type.to_s.tr('_', ' ')} #{expected_number} " \
+              "#{bot.inspect}.#{action} requests,".tap do |msg|
+              msg << " with #{arg_list_matcher}," if arg_list_matcher
+              msg << " but made #{matching_requests_count}"
+              if performed_requests
+                actual_args = performed_requests.map(&:inspect).join(', ')
+                msg << ", and #{performed_requests.count} with #{actual_args}"
+              end
+            end
+          end
+        end
+
+        # Check that bot performed request to telegram API:
+        #
+        #   expect { dispatch_message('Hi!') }.
+        #     to make_telegram_request(bot, :sendMessage).
+        #     with(text: 'Hello!', chat_id: chat_id)
+        def make_telegram_request(bot, action)
+          MakeTelegramRequest.new(bot, action)
+        end
+
+        # Helper for asserting message is sent. Note that options are checked
+        # with `hash_including`. For strict checks use #make_telegram_request.
+        def send_telegram_message(bot, text = nil, options = {})
+          description = "send telegram message #{text.inspect}"
+          text = a_string_matching(text) if text.is_a?(Regexp)
+          options = options.merge(text: text) if text
+          MakeTelegramRequest.new(bot, :sendMessage, description: description).
+            with(hash_including(options))
+        end
+      end
+    end
+  end
+end

lib/telegram/bot/rspec/integration.rb

@@ -0,0 +1,85 @@
+RSpec.shared_context 'telegram/bot/integration' do
+  let(:bot) { Telegram.bot }
+  let(:default_message_options) { {from: from, chat: chat} }
+  let(:from) { {id: from_id} }
+  let(:from_id) { 123 }
+  let(:chat) { {id: chat_id} }
+  let(:chat_id) { 456 }
+  let(:controller_path) do
+    route_name = Telegram::Bot::RoutesHelper.route_name_for_bot(bot)
+    Rails.application.routes.url_helpers.public_send("#{route_name}_path")
+  end
+  let(:request_headers) do
+    {
+      'ACCEPT' => 'application/json',
+      'Content-Type' => 'application/json',
+    }
+  end
+  let(:clear_session?) { described_class.respond_to?(:session_store) }
+  before { described_class.session_store.try!(:clear) if clear_session? }
+
+  include Telegram::Bot::RSpec::ClientMatchers
+
+  def dispatch(update)
+    if ActionPack::VERSION::MAJOR >= 5
+      post(controller_path, params: update.to_json, headers: request_headers)
+    else
+      post(controller_path, update.to_json, request_headers)
+    end
+  end
+
+  def dispatch_message(text, options = {})
+    dispatch message: default_message_options.merge(options).merge(text: text)
+  end
+
+  def dispatch_command(*args)
+    options = args.last.is_a?(Hash) ? args.pop : {}
+    dispatch_message("/#{args.join ' '}", options)
+  end
+
+  # Matcher to check response. Make sure to define `let(:chat_id)`.
+  def respond_with_message(expected = Regexp.new(''))
+    raise 'Define chat_id to use respond_with_message' unless defined?(chat_id)
+    send_telegram_message(bot, expected, chat_id: chat_id)
+  end
+end
+
+RSpec.shared_context 'telegram/bot/callback_query', callback_query: true do
+  include_context 'telegram/bot/integration'
+
+  subject { -> { dispatch callback_query: payload } }
+  let(:payload) { {id: 11, from: from, message: message, data: data} }
+  let(:message) { {message_id: 22, chat: chat, text: 'message text'} }
+
+  # Matcher to check that origin message got edited.
+  def edit_current_message(type, options = {})
+    description = 'edit current message'
+    options = options.merge(
+      message_id: message[:message_id],
+      chat_id: chat_id,
+    )
+    Telegram::Bot::RSpec::ClientMatchers::MakeTelegramRequest.new(
+      bot, :"editMessage#{type.to_s.camelize}", description: description
+    ).with(hash_including(options))
+  end
+
+  # Matcher to check that callback query is answered.
+  def answer_callback_query(text = Regexp.new(''), options = {})
+    description = "answer callback query with #{text.inspect}"
+    text = a_string_matching(text) if text.is_a?(Regexp)
+    options = options.merge(
+      callback_query_id: payload[:id],
+      text: text,
+    )
+    Telegram::Bot::RSpec::ClientMatchers::MakeTelegramRequest.new(
+      bot, :answerCallbackQuery, description: description
+    ).with(hash_including(options))
+  end
+end
+
+RSpec.configure do |config|
+  if config.respond_to?(:include_context)
+    config.include_context 'telegram/bot/integration', :telegram_bot
+    config.include_context 'telegram/bot/callback_query', :telegram_bot, :callback_query
+  end
+end

lib/telegram/bot/updates_controller.rb

@@ -57,9 +57,8 @@ module Telegram
       require 'telegram/bot/updates_controller/log_subscriber'
       require 'telegram/bot/updates_controller/instrumentation'
       require 'telegram/bot/updates_controller/reply_helpers'
-      autoload :CallbackQueyContext, 'telegram/bot/updates_controller/callback_query_context'
+      autoload :CallbackQueryContext, 'telegram/bot/updates_controller/callback_query_context'
       autoload :MessageContext, 'telegram/bot/updates_controller/message_context'
-      autoload :Botan, 'telegram/bot/updates_controller/botan'
 
       include AbstractController::Callbacks
       # Redefine callbacks with default terminator.
@@ -79,13 +78,17 @@ module Telegram
 
       autoload :TypedUpdate, 'telegram/bot/updates_controller/typed_update'
 
-      PAYLOAD_TYPES = %w(
+      PAYLOAD_TYPES = %w[
         message
+        edited_message
+        channel_post
+        edited_channel_post
         inline_query
         chosen_inline_result
         callback_query
-        edited_message
-      ).freeze
+        shipping_query
+        pre_checkout_query
+      ].freeze
       CMD_REGEX = %r{\A/([a-z\d_]{,31})(@(\S+))?(\s|$)}i
       CONFLICT_CMD_REGEX = Regexp.new("^(#{PAYLOAD_TYPES.join('|')}|\\d)")
 
@@ -141,10 +144,12 @@ module Telegram
         @_payload, @_payload_type = payload_data
       end
 
-      # Accessor to `'chat'` field of payload. Can be overriden with `chat` option
-      # for #initialize.
+      # Accessor to `'chat'` field of payload. Also tries `'chat'` in `'message'`
+      # when there is no such field in payload.
+      #
+      # Can be overriden with `chat` option for #initialize.
       def chat
-        @_chat ||= payload && payload['chat']
+        @_chat ||= payload.try! { |x| x['chat'] || x['message'] && x['message']['chat'] }
       end
 
       # Accessor to `'from'` field of payload. Can be overriden with `from` option
@@ -166,25 +171,27 @@ module Telegram
       # Returns array `[is_command?, action, args]`.
       def action_for_payload
         if payload_type
-          send("action_for_#{payload_type}") || [false, payload_type, [payload]]
+          send("action_for_#{payload_type}") || action_for_default_payload
         else
           [false, :unsupported_payload_type, []]
         end
       end
 
+      def action_for_default_payload
+        [false, payload_type, [payload]]
+      end
+
       # If payload is a message with command, then returned action is an
       # action for this command.
       # Separate method, so it can be easily overriden (ex. MessageContext).
+      #
+      # This is not used for edited messages/posts. It process them as basic updates.
       def action_for_message
         cmd, args = self.class.command_from_text(payload['text'], bot_username)
         cmd &&= self.class.action_for_command(cmd)
         [true, cmd, args] if cmd
       end
-
-      # It doesn't extract commands from edited messages. Just process
-      # them as usual ones.
-      def action_for_edited_message
-      end
+      alias_method :action_for_channel_post, :action_for_message
 
       def action_for_inline_query
         [false, payload_type, [payload['query'], payload['offset']]]
@@ -203,6 +210,11 @@ module Telegram
       def action_missing(*)
       end
 
+      PAYLOAD_TYPES.each do |type|
+        method = :"action_for_#{type}"
+        alias_method method, :action_for_default_payload unless instance_methods.include?(method)
+      end
+
       ActiveSupport.run_load_hooks('telegram.bot.updates_controller', self)
     end
   end

lib/telegram/bot/updates_controller/callback_query_context.rb

@@ -3,7 +3,7 @@ module Telegram
     class UpdatesController
       # Use separate actions for different callback queries.
       # It doesn't require session support. Simply add `%{context}:` prefix to data.
-      module CallbackQueyContext
+      module CallbackQueryContext
         protected
 
         # Uses #context_from_callback_query as context name.
@@ -15,7 +15,6 @@ module Telegram
         # because `data` param is controlled by client.
         def action_for_callback_query
           context, new_data = context_from_callback_query
-          # binding.pry
           if context
             action_name = "#{context}_callback_query"
             [false, action_name, [new_data]] if action_method?(action_name)

lib/telegram/bot/updates_controller/instrumentation.rb

@@ -39,7 +39,7 @@ module Telegram
           Instrumentation.instrument(:respond_with, type: type) { super }
         end
 
-        %i(answer_callback_query answer_inline_query).each do |type|
+        %i[answer_callback_query answer_inline_query].each do |type|
           define_method(type) do |*args|
             Instrumentation.instrument(:respond_with, type: type) { super(*args) }
           end

lib/telegram/bot/updates_controller/log_subscriber.rb

@@ -17,7 +17,7 @@ module Telegram
             payload   = event.payload
             additions = UpdatesController.log_process_action(payload)
             message = "Completed in #{event.duration.round}ms"
-            message << " (#{additions.join(' | ')})" unless additions.blank?
+            message << " (#{additions.join(' | ')})" if additions.present?
             message
           end
         end

lib/telegram/bot/updates_controller/message_context.rb

@@ -7,14 +7,11 @@ module Telegram
 
         include Session
 
-        included do
-          # As we use before_action context is cleared anyway,
-          # no matter we used it or not.
-          singleton_class.send :attr_reader, :context_handlers, :context_to_action
-          @context_handlers = {}
-        end
-
         module ClassMethods
+          def context_handlers
+            @_context_handlers ||= {}
+          end
+
           # Registers handler for context.
           #
           #     context_handler :rename do |*|
@@ -39,6 +36,8 @@ module Telegram
             context_handlers[context] = action || context
           end
 
+          attr_reader :context_to_action
+
           # Use it to use context value as action name for all contexts
           # which miss handlers.
           # For security reasons it supports only action methods and will
@@ -59,10 +58,16 @@ module Telegram
         # according to previous request.
         attr_reader :context
 
+        # Controller may have multiple sessions, let it be possible
+        # to select session for message context.
+        def message_context_session
+          session
+        end
+
         # Fetches context and finds handler for it. If message has new command,
         # it has higher priority than contextual action.
         def action_for_message
-          val = session.delete(:context)
+          val = message_context_session.delete(:context)
           @context = val && val.to_sym
           super || context && begin
             handler = handler_for_context
@@ -72,7 +77,7 @@ module Telegram
 
         # Save context for the next request.
         def save_context(context)
-          session[:context] = context
+          message_context_session[:context] = context
         end
 
         def handler_for_context

lib/telegram/bot/updates_controller/reply_helpers.rb

@@ -38,6 +38,19 @@ module Telegram
           )
           bot.answer_callback_query(params)
         end
+
+        # Edit message from callback query.
+        def edit_message(type, params = {})
+          params =
+            if message_id = payload['inline_message_id'] # rubocop:disable AssignmentInCondition
+              params.merge(inline_message_id: message_id)
+            elsif message = payload['message'] # rubocop:disable AssignmentInCondition
+              params.merge(chat_id: message['chat']['id'], message_id: message['message_id'])
+            else
+              raise 'Can not edit message without `inline_message_id` or `message`'
+            end
+          bot.public_send("edit_message_#{type}", params)
+        end
       end
     end
   end

lib/telegram/bot/updates_controller/rspec_helpers.rb

@@ -13,13 +13,18 @@ RSpec.shared_context 'telegram/bot/updates_controller' do
   let(:bot) { Telegram::Bot::ClientStub.new(bot_name) }
   let(:bot_name) { 'bot' }
   let(:session) { controller.send(:session) }
+  let(:from_id) { 123 }
+  let(:chat_id) { 456 }
+  let(:default_message_options) { {from: {id: from_id}, chat: {id: chat_id}} }
+
+  include Telegram::Bot::RSpec::ClientMatchers
 
   def dispatch(bot = self.bot, update = self.update)
     controller.dispatch_again(bot, update)
   end
 
   def dispatch_message(text, options = {})
-    update = build_update :message, options.merge(text: text)
+    update = build_update :message, default_message_options.merge(options).merge(text: text)
     dispatch bot, update
   end
 
@@ -34,4 +39,15 @@ RSpec.shared_context 'telegram/bot/updates_controller' do
     else input
     end
   end
+
+  # Matcher to check response. Make sure to define `let(:chat_id)`.
+  def respond_with_message(expected)
+    send_telegram_message(bot, expected, chat_id: chat_id)
+  end
+end
+
+RSpec.configure do |config|
+  if config.respond_to?(:include_context)
+    config.include_context 'telegram/bot/updates_controller', type: :telegram_bot_controller
+  end
 end

lib/telegram/bot/updates_controller/session.rb

@@ -8,19 +8,26 @@ module Telegram
       module Session
         extend ActiveSupport::Concern
 
+        module ClassMethods
+          # Builds session with given key and optional store (default to session_store).
+          # This way it's easier to define multiple custom sessions,
+          # ex. one for group chat and one for user.
+          def build_session(key, store = session_store)
+            raise 'session_store is not configured' unless store
+            key ? SessionHash.new(store, key) : NullSessionHash.new
+          end
+        end
+
         def process_action(*)
           super
         ensure
-          session.commit
+          session.commit if @_session
         end
 
         protected
 
         def session
-          @_session ||= begin
-            key = session_key
-            key ? SessionHash.new(self.class.session_store, key) : NullSessionHash.new
-          end
+          @_session ||= self.class.build_session(session_key)
         end
 
         def session_key

lib/telegram/bot/updates_controller/testing.rb

@@ -2,7 +2,7 @@ module Telegram
   module Bot
     class UpdatesController
       module Testing
-        IVARS_TO_KEEP = %i(@_session).freeze
+        IVARS_TO_KEEP = %i[@_session].freeze
 
         # Perform multiple dispatches on same instance.
         def dispatch_again(bot = nil, update = nil)

lib/telegram/bot/updates_poller.rb

@@ -27,12 +27,12 @@ module Telegram
       attr_reader :bot, :controller, :timeout, :offset, :logger, :running, :reload
 
       def initialize(bot, controller, **options)
-        @logger = options.fetch(:logger) { defined?(Rails) && Rails.logger }
+        @logger = options.fetch(:logger) { defined?(Rails.logger) && Rails.logger }
         @bot = bot
         @controller = controller
         @timeout = options.fetch(:timeout) { DEFAULT_TIMEOUT }
         @offset = options[:offset]
-        @reload = options.fetch(:reload) { defined?(Rails) && Rails.env.development? }
+        @reload = options.fetch(:reload) { defined?(Rails.env) && Rails.env.development? }
       end
 
       def log(&block)
@@ -50,7 +50,7 @@ module Telegram
             end
           rescue Interrupt
             @running = false
-          rescue => e
+          rescue StandardError => e
             logger.error { ([e.message] + e.backtrace).join("\n") } if logger
           end
         end
@@ -64,15 +64,17 @@ module Telegram
       end
 
       def fetch_updates
-        response = bot.get_updates(offset: offset, timeout: timeout)
-        return unless response['ok'] && response['result'].any?
+        response = bot.async(false) { bot.get_updates(offset: offset, timeout: timeout) }
+        updates = response.is_a?(Array) ? response : response['result']
+        return unless updates && updates.any?
         reload! do
-          response['result'].each do |update|
+          updates.each do |update|
             @offset = update['update_id'] + 1
             yield update
           end
         end
-      rescue Timeout::Error # rubocop:disable HandleExceptions
+      rescue Timeout::Error
+        log { 'Fetch timeout' }
       end
 
       def reload!
@@ -85,7 +87,7 @@ module Telegram
         end
       end
 
-      if defined?(Rails) && Rails.application.respond_to?(:reloader)
+      if defined?(Rails.application) && Rails.application.respond_to?(:reloader)
         def reloading_code
           Rails.application.reloader.wrap do
             yield

lib/telegram/bot/version.rb

@@ -1,6 +1,6 @@
 module Telegram
   module Bot
-    VERSION = '0.8.0'.freeze
+    VERSION = '0.12.4'.freeze
 
     def self.gem_version
       Gem::Version.new VERSION

spec/integration/requests/default_bot_spec.rb

@@ -0,0 +1,13 @@
+require 'integration_helper'
+
+RSpec.describe DefaultBotController, :telegram_bot, type: :request do
+  describe '#start' do
+    subject { -> { dispatch_command :start } }
+    it { should respond_with_message 'from default' }
+  end
+
+  describe '#load_session' do
+    subject { -> { dispatch_command :load_session } }
+    it { should_not raise_error }
+  end
+end

spec/integration/requests/named_bot_spec.rb

@@ -0,0 +1,9 @@
+require 'integration_helper'
+
+RSpec.describe NamedBotController, :telegram_bot, type: :request do
+  let(:bot) { Telegram.bots[:named] }
+  describe '#start' do
+    subject { -> { dispatch_command :start } }
+    it { should respond_with_message 'from named' }
+  end
+end

spec/integration/requests/other_bot_spec.rb

@@ -0,0 +1,14 @@
+require 'integration_helper'
+
+RSpec.describe OtherBotController, :telegram_bot, type: :request do
+  let(:bot) { Telegram.bots[:other] }
+  describe '#start' do
+    subject { -> { dispatch_command :start } }
+    it { should respond_with_message 'from other' }
+  end
+
+  describe '#load_session' do
+    subject { -> { dispatch_command :load_session } }
+    it { should raise_error(/session_store is not configured/) }
+  end
+end

spec/integration_helper.rb

@@ -0,0 +1,76 @@
+require 'telegram/bot/rspec/integration'
+require 'action_controller'
+require 'action_dispatch'
+require 'action_dispatch/testing/integration'
+
+require 'rails'
+require 'telegram/bot/railtie'
+require 'rspec/rails/adapters'
+require 'rspec/rails/fixture_support'
+require 'rspec/rails/example/rails_example_group'
+require 'rspec/rails/example/request_example_group'
+
+ENV['RAILS_ENV'] = 'test'
+class TestApplication < Rails::Application
+  config.eager_load = false
+  config.log_level = :debug
+  config.action_dispatch.show_exceptions = false
+  secrets[:secret_key_base] = 'test'
+  secrets[:telegram] = {
+    bot: 'default_token',
+    bots: {
+      other: {token: 'other_token'},
+      named: {token: 'named_token', username: 'TestBot'},
+    },
+  }
+end
+Rails.application.initialize!
+
+# # Controllers
+%w[default other named].each do |bot_name|
+  controller = Class.new(Telegram::Bot::UpdatesController) do
+    define_method :start do |*|
+      respond_with :message, text: "from #{bot_name}"
+    end
+  end
+  Object.const_set("#{bot_name}_bot_controller".camelize, controller)
+end
+
+[DefaultBotController, OtherBotController].each do |klass|
+  klass.class_eval do
+    use_session!
+
+    define_method :load_session do |*|
+      session[:test]
+    end
+  end
+end
+
+DefaultBotController.session_store = :memory_store
+
+RSpec.configure do |config|
+  config.include RSpec::Rails::RequestExampleGroup, type: :request
+
+  config.around type: :request do |ex|
+    begin
+      Telegram.reset_bots
+      Telegram::Bot::ClientStub.stub_all!
+      ex.run
+    ensure
+      Telegram.reset_bots
+      Telegram::Bot::ClientStub.stub_all!(false)
+    end
+  end
+
+  config.before type: :request do
+    # Redefine routes before every example, so it does not depent on order.
+    Rails.application.routes.draw do
+      require 'telegram/bot/routes_helper'
+      extend Telegram::Bot::RoutesHelper
+
+      telegram_webhooks default: DefaultBotController,
+                        other: OtherBotController,
+                        named: NamedBotController
+    end
+  end
+end

spec/spec_helper.rb

@@ -16,6 +16,9 @@ $LOAD_PATH.unshift GEM_ROOT.join('lib')
 require 'telegram/bot'
 require 'telegram/bot/updates_controller/rspec_helpers'
 require 'telegram/bot/types'
+require 'active_support/core_ext/object/json'
+
+Dir[GEM_ROOT.join('spec/support/**/*.rb')].each { |f| require f }
 
 RSpec.configure do |config|
   config.expect_with :rspec do |expectations|

spec/support/examples/async.rb

@@ -0,0 +1,143 @@
+RSpec.shared_examples 'async' do |request_args: -> {}|
+  let(:instance) { described_class.new(token: token, id: id, async: async) }
+  let(:id) { :default_bot }
+  let(:async) { true }
+  let!(:application_job_class) do
+    klass = Class.new do
+      def self.perform_later(*)
+      end
+    end
+    klass.tap { |x| stub_const('ApplicationJob', x) }
+  end
+  after { described_class.default_async_job = nil }
+
+  describe '#async' do
+    subject { ->(*args, &block) { instance.async(*args, &block) } }
+    its(:call) { should eq described_class.default_async_job }
+
+    context 'when async is disabled' do
+      let(:async) { false }
+      its(:call) { should eq false }
+    end
+
+    context 'when using with block' do
+      it 'sets value inside block' do
+        expect do
+          expect do
+            subject.call(false) do
+              expect do
+                subject.call(nil) { expect(subject[]).to eq nil }
+              end.to_not change(&subject).from false
+              raise 'TestError'
+            end
+          end.to raise_error(/TestError/)
+        end.to_not change(instance, :async).from(described_class.default_async_job)
+      end
+    end
+
+    context 'in multi-threaded environment' do
+      it 'changes only in current thread' do
+        thread = nil
+        expect do
+          thread = Thread.new do
+            expect do
+              subject.call(false) do
+                expect(subject[]).to eq false
+              end
+            end.to_not change(instance, :async).from(described_class.default_async_job)
+            sleep 0.2
+          end
+        end.to_not change(instance, :async).from(described_class.default_async_job)
+        thread.join
+      end
+
+      it 'uses default value after block' do
+        thread = Thread.new do
+          subject.call(false) {}
+          expect { sleep 0.2 }.to change(instance, :async).
+            from(described_class.default_async_job).to(nil)
+        end
+        sleep 0.1
+        instance.async = nil
+        thread.join
+      end
+    end
+  end
+
+  describe '#async=' do
+    subject { ->(val = new_val) { instance.async = val } }
+    let(:async) {}
+
+    context 'when true is given' do
+      let(:new_val) { true }
+      it { should change(instance, :async).to described_class.default_async_job }
+    end
+
+    context 'when false is given' do
+      let(:new_val) { false }
+      it { should change(instance, :async).to false }
+    end
+
+    context 'when string is given' do
+      let(:new_val) { 'Telegram::Bot::Client' }
+      it { should change(instance, :async).to Object.const_get(new_val) }
+    end
+
+    context 'in multi-threaded environment' do
+      subject { ->(val = new_val) { Thread.new { instance.async = val }.join } }
+      let(:new_val) { true }
+      it { should change(instance, :async).to described_class.default_async_job }
+    end
+  end
+
+  describe '.default_async_job' do
+    subject { described_class.default_async_job }
+    its(:superclass) { should eq application_job_class }
+    it { should include Telegram::Bot::Async::Job }
+    its(:client_class) { should eq described_class }
+
+    context 'when ApplicationJob is not defined' do
+      let(:application_job_class) {}
+      it { expect { subject }.to raise_error(/Define ApplicationJob/) }
+    end
+  end
+
+  describe '#request' do
+    subject { ->(*args) { instance.request(*(args.empty? ? self.args : args)) } }
+    let(:args, &request_args)
+    let(:result) { double(:result) }
+
+    shared_examples 'enqueues job' do
+      it 'enqueues job' do
+        expect(instance).to_not receive(:http_request)
+        expect(described_class).to receive(:prepare_async_args).with(*args) { args }
+        expect(instance.async).to receive(:perform_later).with(id.to_s, *args) { result }
+        expect(subject.call).to eq result
+      end
+    end
+
+    include_examples 'enqueues job'
+
+    context 'with custom job class' do
+      let(:async) { double(:job_class) }
+      include_examples 'enqueues job'
+    end
+
+    context 'when id is not set' do
+      let(:id) {}
+      it { should raise_error(/Can not enqueue/) }
+    end
+
+    context 'when async is disabled' do
+      let(:async) { false }
+      let(:result) { double(status: 200, body: '{"test":"ok"}') }
+      let(:args, &request_args)
+
+      it 'performs request immediately' do
+        expect(instance).to receive(:request).with(*args).and_call_original
+        expect(instance).to receive(:http_request) { result }
+        expect(subject[]).to eq 'test' => 'ok'
+      end
+    end
+  end
+end

spec/support/examples/initializers.rb

@@ -0,0 +1,65 @@
+RSpec.shared_examples 'initializers' do |config_method = :bots|
+  describe '.wrap' do
+    subject { described_class.wrap(input, **options) }
+    let(:options) { {} }
+    let(:result) { double(:result) }
+    let(:username) { 'username' }
+
+    context 'when input is a string' do
+      let(:input) { token }
+
+      it 'treats string as token' do
+        expect(described_class).to receive(:new).with(token, {}) { result }
+        should eq result
+      end
+
+      context 'and additional options are given' do
+        let(:options) { {id: :test} }
+
+        it 'passes them to initializer' do
+          expect(described_class).to receive(:new).with(input, **options) { result }
+          should eq result
+        end
+      end
+    end
+
+    context 'when input is a hash' do
+      let(:input) { {token: token, 'username' => username, other: :options} }
+
+      it 'passes it with symbolized keys' do
+        expect(described_class).to receive(:new).with(**input.symbolize_keys) { result }
+        should eq result
+      end
+
+      context 'and additional options are given' do
+        let(:options) { {id: :test} }
+
+        it 'passes them to initializer' do
+          expect(described_class).to receive(:new).
+            with(**input.symbolize_keys, **options) { result }
+          should eq result
+        end
+      end
+    end
+
+    context 'when input is an instance of described_class' do
+      let!(:input) { instance }
+
+      it 'returns input' do
+        expect(described_class).to_not receive(:new)
+        should eq input
+      end
+    end
+
+    context 'when input is a Symbol' do
+      let(:input) { :client_1 }
+      before { allow(Telegram).to receive(config_method) { {client_1: instance} } }
+      it { should eq Telegram.send(config_method)[:client_1] }
+
+      context 'and there is no such bot' do
+        let(:input) { :invalid }
+        it { expect { subject }.to raise_error(/not configured/) }
+      end
+    end
+  end
+end

spec/telegram/bot/async_spec.rb

@@ -0,0 +1,28 @@
+RSpec.describe Telegram::Bot::Async::Job do
+  let(:job_class) do
+    described_class = self.described_class
+    client_class = self.client_class
+    Class.new do
+      include described_class
+      self.client_class = client_class
+    end
+  end
+  let(:client_class) { Telegram::Bot::Client }
+  let(:instance) { job_class.new }
+
+  describe '#perform' do
+    subject { instance.perform(id, *args) }
+    let(:id) { 'bot_id' }
+    let(:args) { [double(:action), {body: :content}] }
+    let(:client) { Telegram::Bot::Client.new(async: custom_job_class) }
+    let(:custom_job_class) { Class.new }
+    let(:result) { double(status: 200, body: '{"test":"ok"}') }
+
+    it 'finds client and performs request' do
+      expect(client_class).to receive(:wrap).with(id.to_sym) { client }
+      expect(client).to receive(:request).with(*args).and_call_original
+      expect(client).to receive(:http_request) { result }
+      should eq 'test' => 'ok'
+    end
+  end
+end

spec/telegram/bot/botan/client_helpers_spec.rb

@@ -0,0 +1,33 @@
+RSpec.describe Telegram::Bot::Client do
+  let(:instance) { described_class.new(*client_args) }
+  let(:token) { 'token' }
+  let(:botan_token) { double(:botan_token) }
+  let(:client_id) { 'client_id' }
+  let(:client_args) { [token] }
+
+  describe '#botan' do
+    subject { instance.botan }
+    it { should eq nil }
+
+    context 'when botan token is set' do
+      let(:client_args) { [token, id: client_id, async: Class.new, botan: botan_token] }
+      it { should be_instance_of Telegram::Bot::Botan }
+      its(:token) { should eq botan_token }
+      its(:id) { should eq client_id }
+
+      it 'doesnt inherit async from client' do
+        expect(instance.async).to be
+        expect(subject.async).to_not be
+      end
+    end
+
+    context 'when botan is configured with hash' do
+      let(:client_args) { [token, id: client_id, async: Class.new, botan: botan_config] }
+      let(:botan_config) { {token: botan_token, async: Class.new} }
+      it { should be_instance_of Telegram::Bot::Botan }
+      its(:token) { should eq botan_token }
+      its(:id) { should eq client_id }
+      its(:async) { should eq botan_config[:async] }
+    end
+  end
+end

spec/telegram/bot/botan/controller_helpers_spec.rb

@@ -1,4 +1,4 @@
-RSpec.describe Telegram::Bot::UpdatesController::Botan do
+RSpec.describe Telegram::Bot::Botan::ControllerHelpers do
   include_context 'telegram/bot/updates_controller'
   let(:controller_class) do
     described_class = self.described_class

spec/telegram/bot/botan_spec.rb

@@ -0,0 +1,27 @@
+RSpec.describe Telegram::Bot::Botan do
+  let(:instance) { described_class.new 'token' }
+  let(:token) { 'token' }
+
+  include_examples 'initializers', :botans
+  it_behaves_like 'async', request_args: -> { [double(:method), double(:url)] }
+
+  describe '.new' do
+    subject { described_class.new(*args) }
+
+    context 'when usual args are given' do
+      let(:args) { ['secret'] }
+      its(:token) { should eq args[0] }
+    end
+
+    context 'when options are given' do
+      let(:args) { [token: 'secret'] }
+      its(:token) { should eq args[0][:token] }
+    end
+  end
+
+  describe '.prepare_async_args' do
+    subject { described_class.prepare_async_args(*input) }
+    let(:input) { [:post, :uri, {a: 1, b: :sym, 'd' => 'str'}, 'body'] }
+    it { should eq ['post', 'uri', {a: 1, b: 'sym', 'd' => 'str'}, 'body'] }
+  end
+end

spec/telegram/bot/client_spec.rb

@@ -3,71 +3,8 @@ RSpec.describe Telegram::Bot::Client do
   let(:token) { 'token' }
   let(:botan_token) { double(:botan_token) }
 
-  describe '.wrap' do
-    subject { described_class.wrap(input) }
-    let(:result) { double(:result) }
-    let(:username) { 'username' }
-
-    context 'when input is a string' do
-      let(:input) { token }
-
-      it 'treats string as token' do
-        expect(described_class).to receive(:new).with(token) { result }
-        should eq result
-      end
-    end
-
-    context 'when input is a hash' do
-      let(:input) { {token: token, username: username, ignore: :ignore} }
-
-      it 'extracts token & username' do
-        expect(described_class).to receive(:new).
-          with(token, username, botan: nil) { result }
-        should eq result
-      end
-
-      context 'when `botan` is given' do
-        let(:input) { super().merge(botan: botan_token) }
-
-        it 'passes it to initializer' do
-          expect(described_class).to receive(:new).
-            with(token, username, botan: botan_token) { result }
-          should eq result
-        end
-      end
-    end
-
-    context 'when input is an instance of described_class' do
-      let!(:input) { instance }
-
-      it 'returns input' do
-        expect(described_class).to_not receive(:new)
-        should eq input
-      end
-    end
-
-    context 'when input is a Symbol' do
-      let(:input) { :bot_1 }
-      before { allow(Telegram).to receive(:bots) { {bot_1: instance} } }
-      it { should eq Telegram.bots[:bot_1] }
-
-      context 'and there is no such bot' do
-        let(:input) { :invalid }
-        it { expect { subject }.to raise_error(/not configured/) }
-      end
-    end
-
-    context 'when input is an array' do
-      let!(:input) { ['other_token', instance, token: token, username: username] }
-      let(:result_2) { double(:result_2) }
-
-      it 'calls wrap for every element' do
-        expect(described_class).to receive(:new).with('other_token') { result }
-        expect(described_class).to receive(:new).with(token, username, botan: nil) { result_2 }
-        should eq [result, instance, result_2]
-      end
-    end
-  end
+  include_examples 'initializers'
+  it_behaves_like 'async', request_args: -> { [double(:action), {body: :content}] }
 
   describe '.prepare_body' do
     subject { described_class.prepare_body(input) }
@@ -82,20 +19,78 @@ RSpec.describe Telegram::Bot::Client do
 
       it 'encodes nested hashes to json' do
         expected = input.dup
-        %i(c d e).each { |x| expected[x] = expected[x].to_json }
+        %i[c d e].each { |x| expected[x] = expected[x].to_json }
         should eq expected
       end
     end
   end
 
-  describe '#botan' do
-    subject { instance.botan }
-    it { should eq nil }
+  describe '.prepare_async_args' do
+    subject { described_class.prepare_async_args(*input) }
+    let(:input) { [:action, a: 1, b: :sym, c: [:other], 'd' => 'str'] }
+    it { should eq ['action', a: 1, b: 'sym', c: '["other"]', 'd' => 'str'] }
+  end
 
-    context 'when botan token is set' do
-      let(:instance) { described_class.new token, botan: botan_token }
-      it { should be_instance_of Telegram::Bot::Botan }
-      its(:token) { should eq botan_token }
+  describe '.new' do
+    subject { described_class.new(*args) }
+
+    context 'when multiple args are given' do
+      let(:args) { %w[secret superbot] }
+      its(:token) { should eq args[0] }
+      its(:username) { should eq args[1] }
+      its(:base_uri) { should include args[0] }
+    end
+
+    context 'when hash is given' do
+      let(:args) { [token: 'secret', username: 'superbot'] }
+      its(:token) { should eq args[0][:token] }
+      its(:username) { should eq args[0][:username] }
+      its(:base_uri) { should include args[0][:token] }
+    end
+  end
+
+  describe '#request' do
+    subject { -> { instance.request(action, request_body) } }
+    let(:action) { :some_action }
+    let(:url) { "#{format described_class::URL_TEMPLATE, token}#{action}" }
+    let(:request_body) { double(:body) }
+    let(:prepared_body) { double(:prepared_body) }
+    let(:response) { HTTP::Message.new_response(body).tap { |x| x.status = status } }
+
+    let(:status) { 200 }
+    let(:body) { body_json.to_json }
+    let(:body_json) { {'param' => 'val', 'description' => 'some description'} }
+    before do
+      expect(described_class).to receive(:prepare_body).with(request_body) { prepared_body }
+      expect(instance).to receive(:http_request).with(url, prepared_body) { response }
+    end
+    around { |ex| Telegram::Bot::ClientStub.stub_all!(false) { ex.run } }
+
+    shared_examples 'invalid body' do |error = Telegram::Bot::Error|
+      context 'when body is not json' do
+        let(:body) { '{' }
+        it { should raise_error error }
+      end
+    end
+
+    its(:call) { should eq body_json }
+    include_examples 'invalid body', JSON::ParserError
+
+    context 'when status is 403' do
+      let(:status) { 403 }
+      it { should raise_error Telegram::Bot::Forbidden, body_json['description'] }
+      include_examples 'invalid body'
+    end
+
+    context 'when status is 404' do
+      let(:status) { 404 }
+      it { should raise_error Telegram::Bot::NotFound, body_json['description'] }
+      include_examples 'invalid body'
+    end
+
+    context 'when status is other' do
+      let(:status) { 500 }
+      it { should raise_error Telegram::Bot::Error, /#{body_json['description']}/ }
     end
   end
 end

spec/telegram/bot/client_stub_spec.rb

@@ -1,7 +1,7 @@
 RSpec.describe Telegram::Bot::ClientStub do
   describe '#stub_all!' do
     let(:client) { Telegram::Bot::Client.new('token', 'bot_name') }
-    let(:clients) { Telegram::Bot::Client.wrap(['token', token: 'token2']) }
+    let(:clients) { ['token', token: 'token2'].map(&Telegram::Bot::Client.method(:wrap)) }
 
     shared_examples 'constructors' do |expected_class|
       it 'makes Client.new return ClientStub' do
@@ -9,7 +9,7 @@ RSpec.describe Telegram::Bot::ClientStub do
         expect(client.username).to eq 'bot_name'
       end
 
-      it 'makes Client.wrap raturn ClientStub' do
+      it 'makes Client.wrap return ClientStub' do
         expect(clients).to contain_exactly instance_of(expected_class),
           instance_of(expected_class)
       end
@@ -35,4 +35,25 @@ RSpec.describe Telegram::Bot::ClientStub do
       include_examples 'constructors', Telegram::Bot::Client
     end
   end
+
+  describe '#new' do
+    subject { described_class.new(*args) }
+
+    context 'when only username is given' do
+      let(:args) { 'superbot' }
+      its(:username) { should eq args }
+    end
+
+    context 'when username and token are given' do
+      let(:args) { %w[token superbot] }
+      its(:token) { should eq args[0] }
+      its(:username) { should eq args[1] }
+    end
+
+    context 'when hash config is given' do
+      let(:args) { [token: 'token', username: 'superbot'] }
+      its(:token) { should eq args[0][:token] }
+      its(:username) { should eq args[0][:username] }
+    end
+  end
 end

spec/telegram/bot/config_methods_spec.rb

@@ -0,0 +1,106 @@
+RSpec.describe Telegram::Bot::ConfigMethods do
+  let(:registry) do
+    Object.new.tap do |x|
+      x.extend described_class
+      x.bots_config = config
+    end
+  end
+  let(:config) do
+    {
+      default: 'default_token',
+      chat: {
+        token: 'chat_token',
+        username: 'Chat',
+        botan: 'chat_botan_token',
+      },
+      other_chat: {
+        'token' => 'other_chat_token',
+        'username' => 'OtherChat',
+        'botan' => 'other_chat_botan_token',
+      },
+    }
+  end
+
+  describe '#bot' do
+    subject { -> { registry.bot } }
+    its(:call) { should eq registry.bots[:default] }
+
+    context 'when bot is not configured' do
+      let(:config) { super().except(:default) }
+      it { should raise_error(/bot is not configured/) }
+    end
+  end
+
+  describe '#bots' do
+    context 'configured by token' do
+      subject { registry.bots[:default] }
+      its(:id) { should eq :default }
+      its(:token) { should eq config[:default] }
+    end
+
+    context 'configured by hash' do
+      subject { registry.bots[:chat] }
+      its(:id) { should eq :chat }
+      its(:token) { should eq config[:chat][:token] }
+      its(:username) { should eq config[:chat][:username] }
+      its('botan.token') { should eq config[:chat][:botan] }
+    end
+
+    context 'configured by hash with stringified keys' do
+      subject { registry.bots[:other_chat] }
+      its(:id) { should eq :other_chat }
+      its(:token) { should eq config[:other_chat]['token'] }
+      its(:username) { should eq config[:other_chat]['username'] }
+      its('botan.token') { should eq config[:other_chat]['botan'] }
+    end
+  end
+
+  describe '#botans' do
+    subject { registry.botans }
+    it do
+      should eq(
+        default: nil,
+        chat: registry.bots[:chat].botan,
+        other_chat: registry.bots[:other_chat].botan,
+      )
+    end
+  end
+
+  describe '#bots_config' do
+    subject { registry.bots_config }
+    it { should eq config }
+
+    context 'when not configured' do
+      let(:registry) { Object.new.tap { |x| x.extend described_class } }
+      before { hide_const('Rails') }
+      it { should eq({}) }
+
+      context 'in rails environment' do
+        before { stub_const('Rails', double(application: double(secrets: secrets))) }
+        let(:secrets) { {} }
+        it { should eq({}) }
+
+        context 'when there is telegram section in secrets' do
+          let(:secrets) { {telegram: config.stringify_keys} }
+          let(:config) do
+            {
+              bot: double(:bot_config),
+              bots: {
+                chat: double(:chat_config),
+                other_chat: double(:other_chat_config),
+              },
+            }
+          end
+          it { should include default: config[:bot] }
+          it { should include config[:bots] }
+
+          context 'on rails >5.1 (deep symbolized keys)' do
+            let(:secrets) { {telegram: config.deep_symbolize_keys} }
+            it { should include default: config[:bot] }
+            it { should include config[:bots] }
+          end
+        end
+      end
+    end
+  end
+end

spec/telegram/bot/routes_helper_spec.rb

@@ -50,8 +50,9 @@ RSpec.describe Telegram::Bot::RoutesHelper do
 
     def assert_routes(*expected) # rubocop:disable AbcSize
       expected.each do |(bot, controller, route_name, options)|
+        expected_path = options.delete(:path) || "telegram/#{bot.token}"
         expect(mapper).to receive(:post) do |path, params|
-          expect(path).to eq "telegram/#{bot.token}"
+          expect(path).to eq expected_path
           middleware = params[:to]
           expect(middleware.controller).to eq(controller)
           expect(middleware.bot.token).to eq(bot.token)
@@ -70,6 +71,27 @@ RSpec.describe Telegram::Bot::RoutesHelper do
         assert_routes [bot, controller, 'default_telegram_webhook', option: :val],
                       [other_bot, controller, 'other_telegram_webhook', option: :val]
       end
+
+      context 'and bot does not have configured token' do
+        let(:bot) { create_bot(nil) }
+        it 'creates routes for every bot and this controller' do
+          assert_routes [bot, controller, 'default_telegram_webhook', option: :val],
+                        [other_bot, controller, 'other_telegram_webhook', option: :val]
+        end
+      end
+
+      context 'and bot has colon in token' do
+        let(:bot) { create_bot('some:token') }
+        it 'replaces colon with underscore' do
+          assert_routes [
+            bot,
+            controller,
+            'default_telegram_webhook',
+            option: :val,
+            path: 'telegram/some_token',
+          ], [other_bot, controller, 'other_telegram_webhook', option: :val]
+        end
+      end
     end
 
     context 'when called with hash' do

spec/telegram/bot/rspec/client_matchers_spec.rb

@@ -0,0 +1,87 @@
+RSpec.describe Telegram::Bot::RSpec::ClientMatchers do
+  let(:bot) { Telegram::Bot::ClientStub.new('TestBot') }
+  let(:other_bot) { Telegram::Bot::ClientStub.new('OtherTestBot') }
+
+  include described_class
+
+  describe '#make_telegram_request' do
+    context 'without args' do
+      it 'works for matching' do
+        block = ->(*) { bot.send_message(text: 'test') }
+        expect(&block).to make_telegram_request(bot, :sendMessage)
+        expect { 3.times(&block) }.to make_telegram_request(bot, :sendMessage).exactly(3).times
+        expect { 3.times(&block) }.to make_telegram_request(bot, :sendMessage).at_least(2).times
+        expect { 3.times(&block) }.to make_telegram_request(bot, :sendMessage).at_most(4).times
+      end
+
+      it 'works for not-matching' do
+        block = ->(*) { bot.get_me }
+        expect {}.to_not make_telegram_request(bot, :getMe)
+        expect { other_bot.get_me }.to_not make_telegram_request(bot, :getMe)
+        expect { 3.times(&block) }.to_not make_telegram_request(bot, :getMe)
+        expect { 3.times(&block) }.to_not make_telegram_request(bot, :getMe).exactly(2).times
+        expect { 3.times(&block) }.to_not make_telegram_request(bot, :getMe).exactly(4).times
+        expect { 3.times(&block) }.to_not make_telegram_request(bot, :getMe).at_least(4).times
+        expect { 3.times(&block) }.to_not make_telegram_request(bot, :getMe).at_most(2).times
+      end
+    end
+
+    context 'with args' do
+      it 'works for exact matching' do
+        args = {text: 'test', parseMode: :Markdown}
+        block = ->(*) { bot.send_message(args) }
+        expect(&block).to make_telegram_request(bot, :sendMessage).with(args)
+        expect(&block).to_not make_telegram_request(bot, :sendMessage).with(args.except(:text))
+        expect { 3.times(&block) }.to make_telegram_request(bot, :sendMessage).
+          with(args).exactly(3).times
+      end
+
+      it 'works for block matchers' do
+        args = {text: 'test', parseMode: :Markdown}
+        block = ->(*) { bot.send_message(args) }
+        expect(&block).to make_telegram_request(bot, :sendMessage).
+          with { |actual| expect(actual).to eq(args) }
+        # It ignores block's result! Custom expectations must be used inside block.
+        expect(&block).to make_telegram_request(bot, :sendMessage).
+          with { |actual| actual == {} }
+        expect do
+          expect(&block).to_not make_telegram_request(bot, :sendMessage).
+            with { |actual| expect(actual).to eq({}) }
+        end.to raise_error RSpec::Expectations::ExpectationNotMetError
+        n = -1
+        expect { 3.times { |i| bot.send_message text: i } }.
+          to make_telegram_request(bot, :sendMessage).exactly(3).times.
+            with { |actual| expect(actual).to eq(text: n += 1) }
+      end
+
+      it 'works for RSpec::Mocks matchers' do
+        args = {text: 'test', parseMode: :Markdown}
+        block = ->(*) { bot.send_message(args) }
+        expect(&block).to make_telegram_request(bot, :sendMessage).with(hash_including(args))
+        expect(&block).to make_telegram_request(bot, :sendMessage).with(
+          text: a_string_matching(/est$/),
+          parseMode: :Markdown,
+        )
+      end
+    end
+  end
+
+  describe '#send_telegram_message' do
+    let(:args) { {text: 'test', parseMode: :Markdown} }
+    let(:block) { ->(*) { bot.send_message(args) } }
+
+    it 'works for matching' do
+      expect(&block).to send_telegram_message(bot, 'test')
+      expect(&block).to send_telegram_message(bot, /^tes/)
+      expect(&block).to send_telegram_message(bot, 'test', parseMode: :Markdown)
+      expect(&block).to send_telegram_message(bot, a_string_including('es'))
+    end
+
+    it 'works for not-matching' do
+      expect(&block).to_not send_telegram_message(bot, 'test!')
+      expect(&block).to_not send_telegram_message(bot, /tes$/)
+      expect(&block).to_not send_telegram_message(bot, 'test', parseMode: :HTML)
+      expect(&block).to_not send_telegram_message(bot, a_string_including('smth'))
+    end
+  end
+end

spec/telegram/bot/rspec/integration_spec.rb

@@ -0,0 +1,112 @@
+require 'telegram/bot/rspec/integration'
+require 'action_controller'
+require 'action_dispatch'
+require 'action_dispatch/testing/integration'
+
+RSpec.describe 'Integrations helper', :telegram_bot do
+  include ActionDispatch::Integration::Runner
+  def reset_template_assertion
+  end
+
+  let(:app) do
+    app = Telegram::Bot::Middleware.new(bot, controller)
+    if ActionPack::VERSION::MAJOR >= 5
+      app
+    else
+      require 'action_dispatch/middleware/params_parser'
+      ActionDispatch::ParamsParser.new(app)
+    end
+  end
+  let(:bot) { Telegram::Bot::ClientStub.new('token') }
+  let(:controller_path) { '/' }
+  let(:controller) do
+    Class.new(Telegram::Bot::UpdatesController) do
+      def start(*args)
+        respond_with :message, text: "Start: #{args.inspect}, option: #{payload[:option]}"
+      end
+    end
+  end
+
+  describe '#default_message_options' do
+    subject { default_message_options }
+    it { should eq from: {id: from_id}, chat: {id: chat_id} }
+  end
+
+  describe '#dispatch' do
+    subject { -> { dispatch message: {text: '/start', **default_message_options} } }
+    it { should respond_with_message 'Start: [], option: ' }
+  end
+
+  describe '#dispatch_message' do
+    subject { -> { dispatch_message "/start #{args.join ' '}", options } }
+    let(:args) { %w[asd qwe] }
+    let(:options) { {} }
+    it { should respond_with_message "Start: #{args.inspect}, option: " }
+
+    context 'with options' do
+      let(:options) { {option: 1} }
+      it { should respond_with_message "Start: #{args.inspect}, option: 1" }
+
+      context 'and chat_id is not set' do
+        let(:options) { super().merge(chat: nil) }
+        it { should raise_error(/chat is not present/) }
+      end
+    end
+  end
+
+  describe '#dispatch_command' do
+    subject { -> { dispatch_command :start, *args } }
+    let(:args) { [] }
+    it { should respond_with_message "Start: #{args.inspect}, option: " }
+
+    context 'with args' do
+      let(:args) { %w[asd qwe] }
+      it { should respond_with_message "Start: #{args.inspect}, option: " }
+    end
+
+    context 'with options' do
+      let(:args) { ['asd', 'qwe', option: 1] }
+      it { should respond_with_message "Start: #{args[0...-1].inspect}, option: 1" }
+    end
+  end
+
+  describe 'callback queries', :callback_query do
+    let(:controller) do
+      Class.new(Telegram::Bot::UpdatesController) do
+        include Telegram::Bot::UpdatesController::CallbackQueryContext
+
+        def callback_query(data = nil, *)
+          answer_callback_query "data: #{data}"
+        end
+
+        def context_callback_query(data = nil, *)
+          answer_callback_query "data: #{data}", extra: :param
+        end
+
+        def answer_and_edit_callback_query(data = nil, *)
+          answer_callback_query "data: #{data}"
+          edit_message :text, text: 'edited-text', extra: :param
+        end
+      end
+    end
+
+    describe '#callback_query' do
+      let(:data) { 'unknown:command' }
+      it { should answer_callback_query("data: #{data}") }
+    end
+
+    describe '#context_callback_query' do
+      let(:data) { 'context:test:payload' }
+      it { should answer_callback_query('data: test:payload', extra: :param) }
+      it { should_not edit_current_message(:text) }
+    end
+
+    describe '#answer_and_edit_callback_query' do
+      let(:data) { 'answer_and_edit:test:payload' }
+      it do
+        should answer_callback_query(/test:payload/).
+          and edit_current_message(:text, text: /edited/, extra: :param)
+      end
+    end
+  end
+end

spec/telegram/bot/updates_controller/callback_query_context_spec.rb

@@ -1,4 +1,4 @@
-RSpec.describe Telegram::Bot::UpdatesController::CallbackQueyContext do
+RSpec.describe Telegram::Bot::UpdatesController::CallbackQueryContext do
   include_context 'telegram/bot/updates_controller'
   let(:controller_class) do
     described_class = self.described_class

spec/telegram/bot/updates_controller/message_context_spec.rb

@@ -65,7 +65,7 @@ RSpec.describe Telegram::Bot::UpdatesController::MessageContext do
 
       context 'when message has new command' do
         let(:text) { '/action a s d' }
-        its(:call) { should eq [:action_result, *%w(a s d)] }
+        its(:call) { should eq [:action_result, 'a', 's', 'd'] }
         it { should change { session[:context] }.to nil }
       end
     end

spec/telegram/bot/updates_controller/reply_helpers_spec.rb

@@ -48,4 +48,32 @@ RSpec.describe Telegram::Bot::UpdatesController do
       end
     end
   end
+
+  describe '#edit_message' do
+    subject { controller.edit_message(type, params) }
+    let(:type) { :reply_markup }
+
+    it { expect { subject }.to raise_error(/Can not edit message without/) }
+
+    context 'when inline_message_id is present' do
+      let(:payload) { {inline_message_id: double(:message_id)} }
+      it 'sets inline_message_id' do
+        expect(bot).to receive("edit_message_#{type}").with(params.merge(
+          inline_message_id: payload[:inline_message_id],
+        )) { result }
+        should eq result
+      end
+    end
+
+    context 'when message is present' do
+      let(:payload) { {message: super().merge(chat: chat)} }
+      it 'sets chat_id & message_id' do
+        expect(bot).to receive("edit_message_#{type}").with(params.merge(
+          message_id: payload[:message][:message_id],
+          chat_id: payload[:message][:chat]['id'],
+        )) { result }
+        should eq result
+      end
+    end
+  end
 end

spec/telegram/bot/updates_controller/session_spec.rb

@@ -54,4 +54,45 @@ RSpec.describe Telegram::Bot::UpdatesController::Session do
       end
     end
   end
+
+  describe '.build_session' do
+    subject { controller_class.build_session(key, *args) }
+    let(:key) {}
+    let(:args) { [] }
+    it { expect { subject }.to raise_error(/session_store is not configured/) }
+
+    shared_examples 'NullSessionHash when key is not present' do |store_proc|
+      it { should be_instance_of(described_class::NullSessionHash) }
+
+      context 'and key is present' do
+        let(:key) { :test_key }
+        it 'is valid SessionHash' do
+          expect(subject).to be_instance_of(described_class::SessionHash)
+          expect(subject.id).to eq key
+          expect(subject.instance_variable_get(:@store)).to be(instance_exec(&store_proc))
+        end
+      end
+    end
+
+    context 'when store configured' do
+      before { controller_class.session_store = nil }
+      include_examples 'NullSessionHash when key is not present',
+        -> { controller_class.session_store }
+    end
+
+    context 'when store is given' do
+      let(:args) { [double(:store)] }
+      include_examples 'NullSessionHash when key is not present', -> { args[0] }
+    end
+  end
+
+  describe '.session_store=' do
+    subject { ->(val) { controller_class.session_store = val } }
+    it 'casts to AS::Cache' do
+      expect { subject[:null_store] }.to change(controller_class, :session_store).
+        to(instance_of(ActiveSupport::Cache::NullStore))
+      expect { subject[nil] }.to change(controller_class, :session_store).
+        to(instance_of(ActiveSupport::Cache::MemoryStore))
+    end
+  end
 end

spec/telegram/bot/updates_controller/typed_update_spec.rb

@@ -9,11 +9,11 @@ RSpec.describe Telegram::Bot::UpdatesController::TypedUpdate do
 
   context 'when `update` is a virtus model' do
     subject { controller }
-    %w(
+    %w[
       message
       inline_query
       chosen_inline_result
-    ).each do |type|
+    ].each do |type|
       context "with #{type}" do
         type_class = Telegram::Bot::Types.const_get(type.camelize)
         let(:payload_type) { type }

spec/telegram/bot/updates_controller_spec.rb

@@ -102,41 +102,59 @@ RSpec.describe Telegram::Bot::UpdatesController do
       it { should eq [false, payload_type, payload.values_at(:data)] }
     end
 
-    context 'when payload is edited_message' do
-      let(:payload_type) { 'edited_message' }
-      it { should eq [false, payload_type, [payload]] }
-    end
-
     context 'when payload is not supported' do
       let(:payload_type) { '_unsupported_' }
       it { should eq [false, :unsupported_payload_type, []] }
     end
 
-    context 'when payload is message' do
-      let(:payload_type) { 'message' }
-      let(:payload) { {'text' => text} }
-      let(:text) { 'test' }
-
-      it { should eq [false, payload_type, [payload]] }
-
-      context 'with command' do
-        let(:text) { "/test#{"@#{mention}" if mention} arg 1 2" }
-        let(:mention) {}
-        it { should eq [true, 'test', %w(arg 1 2)] }
-
-        context 'with mention' do
-          let(:mention) { bot.username }
-          it { should eq [true, 'test', %w(arg 1 2)] }
-        end
-
-        context 'with mention for other bot' do
-          let(:mention) { other_bot_name }
-          it { should eq [false, 'message', [payload]] }
-        end
+    %w[message channel_post].each do |type|
+      context "when payload is edited_#{type}" do
+        let(:payload_type) { "edited_#{type}" }
+        it { should eq [false, payload_type, [payload]] }
       end
 
-      context 'without text' do
-        let(:payload) { {'audio' => {'file_id' => 123}} }
+      context 'when payload is message' do
+        let(:payload_type) { type }
+        let(:payload) { {'text' => text} }
+        let(:text) { 'test' }
+
+        it { should eq [false, payload_type, [payload]] }
+
+        context 'with command' do
+          let(:text) { "/test#{"@#{mention}" if mention} arg 1 2" }
+          let(:mention) {}
+          it { should eq [true, 'test', %w[arg 1 2]] }
+
+          context 'with mention' do
+            let(:mention) { bot.username }
+            it { should eq [true, 'test', %w[arg 1 2]] }
+          end
+
+          context 'with mention for other bot' do
+            let(:mention) { other_bot_name }
+            it { should eq [false, payload_type, [payload]] }
+          end
+        end
+
+        context 'without text' do
+          let(:payload) { {'audio' => {'file_id' => 123}} }
+          it { should eq [false, payload_type, [payload]] }
+        end
+      end
+    end
+
+    custom_payload_types = %w[
+      message
+      edited_message
+      channel_post
+      edited_channel_post
+      inline_query
+      chosen_inline_result
+      callback_query
+    ]
+    (described_class::PAYLOAD_TYPES - custom_payload_types).each do |type|
+      context "when payload is #{type}" do
+        let(:payload_type) { type }
         it { should eq [false, payload_type, [payload]] }
       end
     end
@@ -145,11 +163,11 @@ RSpec.describe Telegram::Bot::UpdatesController do
   context 'when `update` is a virtus model' do
     subject { controller }
     let(:update) { Telegram::Bot::Types::Update.new(super()) }
-    %w(
+    %w[
       message
       inline_query
       chosen_inline_result
-    ).each do |type|
+    ].each do |type|
       context "with #{type}" do
         type_class = Telegram::Bot::Types.const_get(type.camelize)
         let(:payload_type) { type }
@@ -176,7 +194,7 @@ RSpec.describe Telegram::Bot::UpdatesController do
 
   describe '#process' do
     subject { -> { controller.process(:action, *args) } }
-    let(:args) { [:arg1, :arg2] }
+    let(:args) { %i[arg1 arg2] }
     let(:controller_class) do
       Class.new(described_class) do
         attr_reader :acted, :hooked
@@ -293,4 +311,49 @@ RSpec.describe Telegram::Bot::UpdatesController do
       end
     end
   end
+
+  describe '#chat' do
+    subject { controller.chat }
+    let(:payload_type) { :message }
+    let(:payload) { {chat: 'test_value'} }
+    it { should eq payload[:chat] }
+
+    context 'when payload is not set' do
+      let(:payload) {}
+      it { should eq nil }
+    end
+
+    context 'when payload has no such field' do
+      let(:payload) { {smth: 'other'} }
+      it { should eq nil }
+
+      context 'but has `message`' do
+        let(:payload) { {message: message} }
+        let(:message) { {text: 'Hello bot!'} }
+        it { should eq nil }
+
+        context 'with `chat` set' do
+          let(:message) { super().merge(chat: 'test value') }
+          it { should eq message[:chat] }
+        end
+      end
+    end
+  end
+
+  describe '#from' do
+    subject { controller.from }
+    let(:payload_type) { :message }
+    let(:payload) { {from: 'test_value'} }
+    it { should eq payload[:from] }
+
+    context 'when payload is not set' do
+      let(:payload) {}
+      it { should eq nil }
+    end
+
+    context 'when payload has no such field' do
+      let(:payload) { {smth: 'other'} }
+      it { should eq nil }
+    end
+  end
 end

spec/telegram/bot/updates_poller_spec.rb

@@ -1,9 +1,39 @@
 RSpec.describe Telegram::Bot::UpdatesPoller do
-  describe '#initialize' do
-    subject { described_class.new bot, controller }
-    let(:bot) { double }
-    let(:controller) { double }
+  let(:instance) { described_class.new(bot, controller) }
+  let(:bot) { Telegram::Bot::Client.new('token') }
+  let(:controller) { double(:controller) }
 
+  describe '#initialize' do
+    subject { instance }
     it { should be }
   end
+
+  describe '#fetch_updates' do
+    subject { -> { instance.fetch_updates(&block) } }
+    let(:block) { ->(x) { expect(x).to eq expected_results.shift } }
+    let(:results) { [{update_id: 12}, {update_id: 34}] }
+    let(:expected_results) { results.as_json }
+    let(:request_result) { {ok: true, result: results}.as_json }
+    before do
+      allow(bot).to receive(:get_updates) do
+        expect(bot.async).to be_falsy
+        request_result
+      end
+    end
+
+    it { should change(instance, :offset).to(results.last[:update_id] + 1) }
+    it { should change { expected_results }.to([]) }
+
+    context 'with typed response' do
+      let(:request_result) { results.as_json.map { |x| Telegram::Bot::Types::Update.new(x) } }
+      let(:expected_results) { request_result.dup }
+      it { should change(instance, :offset).to(results.last[:update_id] + 1) }
+      it { should change { expected_results }.to([]) }
+    end
+
+    context 'when bot is in async mode' do
+      let(:bot) { Telegram::Bot::Client.new('token', async: Class.new) }
+      it { should change { expected_results }.to([]) }
+    end
+  end
 end

spec/telegram/bot_spec.rb

@@ -2,22 +2,4 @@ RSpec.describe Telegram::Bot do
   it 'has a version number' do
     expect(described_class::VERSION).not_to be nil
   end
-
-  describe described_class::StaleChat do
-    describe '.match_response?' do
-      subject { ->(val) { described_class.match_response?(val) } }
-
-      it 'returns true for specific errors' do
-        expect(subject.call({})).to eq false
-        expect(subject.call('description' => 'test')).to eq false
-        expect(subject.call('description' => 'Error: bot was kicked from')).to eq true
-        expect(subject.call(
-          'description' => "Forbidden: can't write to private chat with deleted user"
-        )).to eq true
-        expect(subject.call(
-          'description' => 'Bad request: group chat is deactivated'
-        )).to eq true
-      end
-    end
-  end
 end

telegram-bot.gemspec

@@ -1,4 +1,3 @@
-# coding: utf-8
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'telegram/bot/version'
@@ -20,9 +19,10 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = '~> 2.0'
 
-  spec.add_dependency 'activesupport', '>= 4.0', '< 5.1'
-  spec.add_dependency 'actionpack', '>= 4.0', '< 5.1'
+  spec.add_dependency 'actionpack', '>= 4.0', '< 6.0'
+  spec.add_dependency 'activesupport', '>= 4.0', '< 6.0'
   spec.add_dependency 'httpclient', '~> 2.7'
+
   spec.add_development_dependency 'bundler', '~> 1.11'
   spec.add_development_dependency 'rake', '~> 10.0'
 end