Fix infinite loop on Timeout while stopped (atipugin#309)

lib/telegram/bot/client.rb

@@ -35,7 +35,7 @@ def fetch_updates
           yield handle_update(update)
         end
       rescue Faraday::TimeoutError, Faraday::ConnectionFailed
-        retry
+        retry if @running
       end
 
       def handle_update(update)

spec/lib/telegram/bot/client_spec.rb

@@ -16,21 +16,48 @@
   end
 
   describe '#stop' do
-    before do
-      allow(client.api).to receive(:getUpdates).and_return [Telegram::Bot::Types::Update.new(update_id: 111_111)]
+    context 'when bot receives messages' do
+      before do
+        allow(client.api).to receive(:getUpdates).and_return [Telegram::Bot::Types::Update.new(update_id: 111_111)]
 
-      current_times = 0
+        current_times = 0
 
-      client.listen do |_message|
-        current_times += 1
-        client.stop if current_times == expected_times
+        client.listen do |_message|
+          current_times += 1
+          client.stop if current_times == expected_times
+        end
+      end
+
+      let(:expected_times) { 3 }
+
+      specify do
+        expect(client.api).to have_received(:getUpdates).exactly(expected_times).times
       end
     end
 
-    let(:expected_times) { 3 }
+    context 'when bot does not receive any messages' do
+      before do
+        current_times = 0
+
+        allow(client.api).to receive(:getUpdates) do
+          if current_times >= expected_times - 1
+            client.stop
+            raise Faraday::TimeoutError
+          end
 
-    specify do
-      expect(client.api).to have_received(:getUpdates).exactly(expected_times).times
+          [Telegram::Bot::Types::Update.new(update_id: 111_111)]
+        end
+
+        client.listen do |_message|
+          current_times += 1
+        end
+      end
+
+      let(:expected_times) { 3 }
+
+      specify do
+        expect(client.api).to have_received(:getUpdates).exactly(expected_times).times
+      end
     end
   end