Merge remote branch 'darrinholst/master'

lib/capybara/driver/rack_test_driver.rb

@@ -141,7 +141,7 @@ class Capybara::Driver::RackTest < Capybara::Driver::Base
           end
         end
       end
-      merge_param!(params, button[:name], button[:value]) if button[:name]
+      merge_param!(params, button[:name], button[:value] || "") if button[:name]
       params
     end
 

spec/dsl/click_button_spec.rb

@@ -202,6 +202,12 @@ shared_examples_for "click_button" do
       end
     end
 
+    it "should serialize and send valueless buttons that were clicked" do
+      @session.click_button('No Value!')
+      @results = extract_results(@session)
+      @results['no_value'].should_not be_nil
+    end
+
     it "should serialize and send GET forms" do
       @session.visit('/form')
       @session.click_button('med')

spec/views/form.erb

@@ -153,6 +153,7 @@
     <input type="submit" name="form[crappy]" id="crap321" value="crappy"/>
     <input type="image" name="form[okay]" id="okay556" value="okay" alt="oh hai thar"/>
     <button type="submit" id="click_me_123" value="click_me">Click me!</button>
+    <button type="submit" name="form[no_value]">No Value!</button>
   </p>
 </form>