add support for form attribute on input, select, and textarea elements

lib/capybara/rack_test/form.rb

@@ -16,8 +16,9 @@ class Capybara::RackTest::Form < Capybara::RackTest::Node
 
   def params(button)
     params = {}
-
-    native.xpath("(.//input|.//select|.//textarea)[not(@disabled)]").map do |field|
+    element_query="((.//input|.//select|.//textarea)[not(@form)])"
+    element_query+="|((//input|//select|//textarea)[@form='#{native[:id]}'])" if native[:id]
+    native.xpath("(#{element_query})[not(@disabled)]").map do |field|
       case field.name
       when 'input'
         if %w(radio checkbox).include? field['type']

lib/capybara/spec/session/click_button_spec.rb

@@ -162,6 +162,30 @@ Capybara::SpecHelper.spec '#click_button' do
     end
   end
   
+  context "with fields associated with the form using the form attribute" do
+    before do
+      @session.click_button('submit_form1')
+      @results = extract_results(@session)
+    end
+    
+    it "should serialize and submit text fields" do
+      @results['outside_input'].should == 'outside_input'
+    end
+    
+    it "should serialize text areas" do
+      @results['outside_textarea'].should == 'Some text here'
+    end
+
+    it "should serialize select tags" do
+      @results['outside_select'].should == 'Ruby'
+    end
+         
+    it "should not serliaze fields associated with a different form" do
+      @results['for_form2'].should be_nil
+    end
+  end
+  
+  
   context "with submit button outside the form defined by <button> tag" do
     before do
       @session.click_button('outside_button')
@@ -190,7 +214,7 @@ Capybara::SpecHelper.spec '#click_button' do
     
     it "should submit the button that was clicked, but not other buttons" do
       @results['outside_submit'].should == 'outside_submit'
-      @results['unused'].should be_nil
+      @results['submit_form1'].should be_nil
     end
   end
  

lib/capybara/spec/views/form.erb

@@ -257,9 +257,12 @@
   </p>
 </form>
 
+<input type="text" name="form[outside_input]" value="outside_input" form="form1"/>
+
 <form id="form1" action="/form" method="post">
   <input type="text" name="form[which_form]" value="form1" id="form_which_form"/>
-  <input type="submit" name="form[unused]" value="unused"/>
+  <input type="text" name="form[for_form2]" value="for_form2" form="form2"/>
+  <input type="submit" name="form[submit_form1]" value="submit_form1" id="submit_form1"/>
 </form>
 
 <form id="form2" action="/form" method="post">
@@ -268,6 +271,13 @@
   <button type="submit" name="form[other_form_button]" value="other_form_button" form="form1">Form1</button>
 </form>
 
+<textarea name="form[outside_textarea]" form="form1">Some text here</textarea>
+<select name="form[outside_select]" form="form1">
+  <option>Lisp</option>
+  <option selected="selected">Ruby</option>
+  <option>Php</option>
+</select>
+
 <input type="submit" name="form[outside_submit]" value="outside_submit" form="form1"/>
 <button type="submit" name="form[outside_button]" value="outside_button" form="form2">Outside!</button>