Add UpdatesController#webhook_request

spec/integration/requests/default_bot_spec.rb

@@ -10,4 +10,13 @@ RSpec.describe DefaultBotController, telegram_bot: :rails do
     subject { -> { dispatch_command :load_session } }
     it { should_not raise_error }
   end
+
+  describe '#dispatch' do
+    it 'provides webhook_request' do
+      expect(described_class).to receive(:dispatch).
+        with(bot, hash_including('message'), instance_of(ActionDispatch::Request)).
+        and_call_original
+      dispatch_message :test
+    end
+  end
 end