added evaluate_script method to all javascipt drivers for evaluating javascript

lib/capybara/driver/culerity_driver.rb

@@ -5,7 +5,7 @@ class Capybara::Driver::Culerity
     def text
       node.text
     end
-    
+
     def [](name)
       value = if name.to_sym == :class
         node.class_name
@@ -18,28 +18,28 @@ class Capybara::Driver::Culerity
     def set(value)
       node.set(value)
     end
-    
+
     def select(option)
       node.select(option)
     end
-    
+
     def click
       node.click
     end
-    
+
     def drag_to(element)
       node.fire_event('mousedown')
       element.node.fire_event('mousemove')
       element.node.fire_event('mouseup')
     end
-    
+
     def tag_name
       # FIXME: this might be the dumbest way ever of getting the tag name
       # there has to be something better...
       node.to_xml[/^\s*<([a-z0-9\-\:]+)/, 1]
     end
   end
-  
+
   attr_reader :app, :rack_server
 
   def self.server
@@ -57,25 +57,29 @@ class Capybara::Driver::Culerity
     @rack_server = Capybara::Server.new(@app)
     @rack_server.boot
   end
-  
+
   def visit(path)
     browser.goto(url(path))
   end
-  
+
   def body
     browser.html
   end
-  
+
   def find(selector)
     browser.elements_by_xpath(selector).map { |node| Node.new(self, node) }
   end
 
+  def evaluate_script(script)
+    browser.execute_script "#{script}"
+  end
+
 private
 
   def url(path)
     rack_server.url(path)
   end
-  
+
   def browser
     unless @_browser
       @_browser = ::Culerity::RemoteBrowserProxy.new self.class.server, {:browser => :firefox, :log_level => :off}

lib/capybara/driver/selenium_driver.rb

@@ -84,6 +84,10 @@ class Capybara::Driver::Selenium
     driver.find_elements(:xpath, selector).map { |node| Node.new(self, node) }
   end
 
+  def evaluate_script(script)
+    driver.execute_script "return #{script}"
+  end
+
 private
 
   def url(path)

spec/drivers_spec.rb

@@ -37,7 +37,7 @@ shared_examples_for 'driver' do
         @driver.find('//a')[0].text.should == 'labore'
         @driver.find('//a')[1].text.should == 'ullamco'
       end
-      
+
       it "should extract node attributes" do
         @driver.find('//a')[0][:href].should == '/with_simple_html'
         @driver.find('//a')[0][:class].should == 'simple'
@@ -51,7 +51,7 @@ shared_examples_for 'driver' do
         @driver.find('//input').first.set('gorilla')
         @driver.find('//input').first.value.should == 'gorilla'
       end
-      
+
       it "should extract node tag name" do
         @driver.find('//a')[0].tag_name.should == 'a'
         @driver.find('//a')[1].tag_name.should == 'a'
@@ -63,20 +63,27 @@ shared_examples_for 'driver' do
 end
 
 shared_examples_for "driver with javascript support" do
+  before { @driver.visit('/with_js') }
+
   describe '#find' do
     it "should find dynamically changed nodes" do
-      @driver.visit('/with_js')
       @driver.find('//p').first.text.should == 'I changed it'
     end
   end
-  
+
   describe '#drag_to' do
     it "should drag and drop an object" do
-      @driver.visit('/with_js')
       draggable = @driver.find('//div[@id="drag"]').first
       droppable = @driver.find('//div[@id="drop"]').first
       draggable.drag_to(droppable)
       @driver.find('//div[contains(., "Dropped!")]').should_not be_nil
     end
   end
+
+  describe "#evaluate_script" do
+    it "should return the value of the executed script" do
+      @driver.evaluate_script('1+1').should == 2
+    end
+  end
+
 end