Support rack_test driver toggling details elements

lib/capybara/rack_test/node.rb

@@ -76,6 +76,8 @@ def click(keys = [], **options)
       set(!checked?)
     elsif tag_name == 'label'
       click_label
+    elsif tag_name == 'details'
+      toggle_details
     end
   end
 
@@ -236,6 +238,14 @@ def click_label
     labelled_control.set(!labelled_control.checked?) if checkbox_or_radio?(labelled_control)
   end
 
+  def toggle_details
+    if native.has_attribute?('open')
+      native.remove_attribute('open')
+    else
+      native.set_attribute('open', 'open')
+    end
+  end
+
   def link?
     tag_name == 'a' && !self[:href].nil?
   end

lib/capybara/spec/session/node_spec.rb

@@ -269,9 +269,13 @@
       expect(descendants).to all(be_visible)
     end
 
-    it 'sees opened details as visible', requires: [:js] do
+    it 'works when details is toggled open and closed' do
       @session.find(:css, '#closed_details').click
       expect(@session.all(:css, '#closed_details *')).to all(be_visible)
+
+      @session.find(:css, '#closed_details').click
+      descendants = @session.all(:css, '#closed_details > *:not(summary), #closed_details > *:not(summary) *', minimum: 2)
+      expect(descendants).not_to include(be_visible)
     end
   end