Test for directory upload support

lib/capybara/spec/views/form.erb

@@ -547,6 +547,11 @@ New line after and before textarea tag
     <input type="file" name="form[multiple_documents][]" id="form_multiple_documents" multiple="multiple" />
   </p>
 
+  <p>
+    <label for="form_directory_upload">Directory Upload</label>
+    <input type="file" name="form[multiple_documents][]" id="form_directory_upload" multiple="multiple" webkitdirectory="webkitdirectory" mozdirectory="mozdirectory" />
+  </p>
+
   <p>
     <input type="submit" value="Upload Multiple"/>
   <p>

spec/shared_selenium_session.rb

@@ -334,6 +334,20 @@ RSpec.shared_examples 'Capybara::Session' do |session, mode|
       end
     end
 
+    describe 'Capybara#Node#attach_file' do
+      it 'can attach a directory', :focus_ do
+        pending "Geckodriver doesn't support uploading a directory" if marionette?(session)
+        pending "Selenium remote doesn't support transferring a directory" if remote?(session)
+        pending "Headless Chrome doesn't support directory upload - https://bugs.chromium.org/p/chromedriver/issues/detail?id=2521&q=directory%20upload&colspec=ID%20Status%20Pri%20Owner%20Summary" if chrome?(session) && ENV['HEADLESS']
+
+        session.visit('/form')
+        @test_file_dir = File.expand_path('./fixtures', File.dirname(__FILE__))
+        session.attach_file('Directory Upload', @test_file_dir)
+        session.click_button('Upload Multiple')
+        expect(session.body).to include('5 | ') # number of files
+      end
+    end
+
     context 'Windows' do
       it "can't close the primary window" do
         expect do

spec/spec_helper.rb

@@ -42,6 +42,10 @@ module Capybara
     def browser_name(session)
       session.driver.browser.browser if session.respond_to?(:driver)
     end
+
+    def remote?(session)
+      session.driver.browser.is_a? ::Selenium::WebDriver::Remote::Driver
+    end
   end
 end