Rescue from Errno::ECONNREFUSED.

Response to GH issues #579 and #663.

lib/geocoder/lookups/base.rb

@@ -169,6 +169,8 @@ module Geocoder
         parse_raw_data fetch_raw_data(query)
       rescue SocketError => err
         raise_error(err) or warn "Geocoding API connection cannot be established."
+      rescue Errno::ECONNREFUSED => err
+        raise_error(err) or warn "Geocoding API connection refused."
       rescue TimeoutError => err
         raise_error(err) or warn "Geocoding API not responding fast enough " +
           "(use Geocoder.configure(:timeout => ...) to set limit)."

test/test_helper.rb

@@ -110,6 +110,7 @@ module Geocoder
       def make_api_request(query)
         raise TimeoutError if query.text == "timeout"
         raise SocketError if query.text == "socket_error"
+        raise Errno::ECONNREFUSED if query.text == "connection_refused"
         read_fixture fixture_for_query(query)
       end
     end

test/unit/error_handling_test.rb

@@ -41,4 +41,16 @@ class ErrorHandlingTest < GeocoderTestCase
       end
     end
   end
+
+  def test_always_raise_connection_refused_error
+    Geocoder.configure(:always_raise => [Errno::ECONNREFUSED])
+    Geocoder::Lookup.all_services_except_test.each do |l|
+      next if l == :maxmind_local # local, does not raise timeout
+      lookup = Geocoder::Lookup.get(l)
+      set_api_key!(l)
+      assert_raises Errno::ECONNREFUSED do
+        lookup.send(:results, Geocoder::Query.new("connection_refused"))
+      end
+    end
+  end
 end