Fixing settings failure problem where there is no index

lib/tire/index.rb

@@ -116,7 +116,7 @@ def delete_mapping(type)
 
     def settings
       @response = Configuration.client.get("#{url}/_settings")
-      MultiJson.decode(@response.body)[@name]['settings']
+      MultiJson.decode(@response.body).fetch(@name, {}).fetch('settings', {})
     end
 
     def store(*args)

test/unit/index_test.rb

@@ -237,7 +237,16 @@ class IndexTest < Test::Unit::TestCase
 
           assert_equal '20', @index.settings['index.number_of_shards']
         end
-
+
+        should "return a blank hash for settings if the index is missing" do
+          json = <<-JSON
+            {"error":"IndexMissingException[[foo] missing]","status":404}
+          JSON
+
+          Configuration.client.stubs(:get).returns(mock_response(json, 404))
+
+          assert_equal ({}), Tire.index('foo').settings
+        end
       end
 
       context "when storing" do