rescue_from feature

spec/telegram/bot/updates_controller/rescue_spec.rb

@@ -0,0 +1,31 @@
+RSpec.describe Telegram::Bot::UpdatesController::Rescue do
+  include_context 'telegram/bot/updates_controller'
+
+  describe '#process_action' do
+    subject { -> { dispatch_message("/#{command} x y z") } }
+
+    let(:controller_class) do
+      Class.new(Telegram::Bot::UpdatesController) do
+        rescue_from ArgumentError, with: -> { respond_with :message, text: 'Rescued' }
+
+        def rescuable(*)
+          raise ArgumentError, 'rescuable'
+        end
+
+        def not_rescuable(*)
+          raise 'not_rescuable'
+        end
+      end
+    end
+
+    context 'when exception is rescued' do
+      let(:command) { :rescuable }
+      it { should respond_with_message 'Rescued' }
+    end
+
+    context 'when exception is not rescued' do
+      let(:command) { :not_rescuable }
+      it { should raise_error('not_rescuable') }
+    end
+  end
+end