[rb] Support registering custom finders for SearchContext

rb/lib/selenium/webdriver/common/search_context.rb

@@ -35,6 +35,14 @@ module SearchContext
         xpath: 'xpath'
       }.freeze
 
+      class << self
+        attr_accessor :extra_finders
+
+        def finders
+          FINDERS.merge(extra_finders || {})
+        end
+      end
+
       #
       # Find the first element matching the given arguments
       #
@@ -57,7 +65,7 @@ module SearchContext
       def find_element(*args)
         how, what = extract_args(args)
 
-        by = FINDERS[how.to_sym]
+        by = SearchContext.finders[how.to_sym]
         raise ArgumentError, "cannot find element by #{how.inspect}" unless by
 
         bridge.find_element_by by, what, ref
@@ -72,7 +80,7 @@ def find_element(*args)
       def find_elements(*args)
         how, what = extract_args(args)
 
-        by = FINDERS[how.to_sym]
+        by = SearchContext.finders[how.to_sym]
         raise ArgumentError, "cannot find elements by #{how.inspect}" unless by
 
         bridge.find_elements_by by, what, ref

rb/spec/unit/selenium/webdriver/search_context_spec.rb

@@ -89,6 +89,22 @@ def initialize(bridge)
           }.to raise_error(ArgumentError, 'cannot find elements by :foo')
         end
       end
+
+      context 'when extra finders are registered' do
+        around do |example|
+          described_class.extra_finders = {accessibility_id: 'accessibility id'}
+          example.call
+        ensure
+          described_class.extra_finders = nil
+        end
+
+        it 'finds element' do
+          allow(bridge).to receive(:find_element_by).with('accessibility id', 'foo', nil).and_return(element)
+
+          expect(search_context.find_element(accessibility_id: 'foo')).to eq(element)
+          expect(bridge).to have_received(:find_element_by).with('accessibility id', 'foo', nil)
+        end
+      end
     end
   end # WebDriver
 end # Selenium