Merge pull request #137 from DylanLacey/accessibility_id

Add accessiblity_id finder

Author: bootstraponline

lib/appium_lib/device/device.rb

@@ -35,6 +35,8 @@ def remove(id)
             execute :remove, {}, :appId => id
           end
         end
+
+        extend_search_contexts
       end 
 
       def add_endpoint_method(method, path)
@@ -98,6 +100,18 @@ def log_reimplemented_warning(method, path)
         msg << " Raise an issue at http://github.com/appium/ruby_lib if so."
         Appium::Logger.warn msg
       end
+
+      # @!method accessiblity_id_find
+      #   find_element/s with their accessibility_id
+      #
+      #   ```ruby
+      #    find_elements :accessibility_id, 'Animation'
+      #   ```
+      def extend_search_contexts
+        Selenium::WebDriver::SearchContext.class_eval do
+          Selenium::WebDriver::SearchContext::FINDERS[:accessibility_id] = 'accessibility id'
+        end
+      end
     end
   end
 end