rb - add browser option for Firefox Nightly

Author: titusfortner

rb/lib/selenium/webdriver/common/driver.rb

@@ -52,6 +52,9 @@ def for(browser, opts = {})
                      else
                        Firefox::Bridge.new(opts)
                      end
+                   when :firefox_nightly
+                     Firefox::Binary.nightly_path
+                     Firefox::W3CBridge.new(opts)
                    when :remote
                      Remote::Bridge.new(opts)
                    when :ie, :internet_explorer

rb/lib/selenium/webdriver/firefox/binary.rb

@@ -153,6 +153,16 @@ def version
             `#{path} -v`.strip[/[^\s]*$/][/^\d+/].to_i
           end
 
+          def nightly_path
+            @path = case Platform.os
+                    when :macosx
+                      nightly_path = "/Applications/FirefoxNightly.app/Contents/MacOS/firefox-bin"
+                      nightly_path if File.exist?(nightly_path)
+                    when :windows
+                      Platform.find_in_program_files("\\Nightly\\firefox.exe")
+                    end
+          end
+
           private
 
           def windows_path