Fixed Webrat not finding <button type='submit'>

.gitignore

@@ -1,4 +1,5 @@
+.DS_Store
 pkg
 doc
 ri
-email.txt
+email.txt

lib/webrat/field.rb

@@ -3,15 +3,14 @@ class Field
 
     def self.class_for_element(element)
       if element.name == "input"
-        if %w[submit image].include?(element["type"])
+        if %w[submit image button].include?(element["type"])
           field_class = "button"
         else
           field_class = element["type"] || "text" #default type; 'type' attribute is not mandatory
         end
       else
         field_class = element.name
       end
-
       Webrat.const_get("#{field_class.capitalize}Field")
     #rescue NameError
     #  raise "Invalid field element: #{element.inspect}"

lib/webrat/form.rb

@@ -45,7 +45,7 @@ def fields
 
       @fields = []
 
-      (@element / "input, textarea, select").each do |field_element|
+      (@element / "input, textarea, select, button").each do |field_element|
         @fields << Field.class_for_element(field_element).new(self, field_element)
       end
 

test/clicks_button_test.rb

@@ -77,6 +77,23 @@ def test_should_submit_the_first_form_by_default
     @session.clicks_button
   end
 
+  #<button type='submit'> is also valid HTML.
+  def test_should_work_with_button_submit
+    @response.stubs(:body).returns(<<-EOS)
+<form action="/form1" method="post"><p><label for="login">Login</label><br/>
+
+<input type="text" class="text" name="login"/></p>
+
+<p><label for="password">Password</label><br/>
+<input type="password" class="password" name="password"/></p>
+<p><button type="submit">Log in</button></p>
+</form>
+
+    EOS
+    @session.expects(:post_via_redirect)
+    @session.clicks_button
+  end  
+
   def test_should_not_explode_on_file_fields
     @response.stubs(:body).returns(<<-EOS)
       <form method="get" action="/form1">