Only split CSS if :class or :id are specified - Fixes Issue #2044 to 3.1.1 level for now

lib/capybara/queries/selector_query.rb

@@ -225,12 +225,14 @@ module Capybara
           raise ArgumentError, "XPath expressions are not supported for the :class filter with CSS based selectors"
         end
 
-        css_selectors = expr.split(',').map(&:rstrip)
-        expr = css_selectors.map do |sel|
-          sel += "##{Capybara::Selector::CSS.escape(options[:id])}" if process_id
-          sel += css_from_classes(Array(options[:class])) if process_class
-          sel
-        end.join(", ")
+        if process_class || process_id
+          css_selectors = expr.split(',').map(&:rstrip)
+          expr = css_selectors.map do |sel|
+            sel += "##{Capybara::Selector::CSS.escape(options[:id])}" if process_id
+            sel += css_from_classes(Array(options[:class])) if process_class
+            sel
+          end.join(", ")
+        end
         expr
       end
 

spec/shared_selenium_session.rb

@@ -273,7 +273,7 @@ RSpec.shared_examples "Capybara::Session" do |session, mode|
         expect(@animation_session).to have_no_link('transition me away', wait: 0.5)
       end
 
-      it "should disable CSS animations", :focus_ do
+      it "should disable CSS animations" do
         @animation_session.visit('with_animation')
         @animation_session.click_link('animate me away')
         expect(@animation_session).to have_no_link('animate me away', wait: 0.5)