#335035: simpletest should skip disabled field on POST submissions.

From: Damien Tournoud <damien@tournoud.net>

According to [1], disabled controls cannot be successful (ie. 'valid for submission').

[1] http://www.w3.org/TR/REC-html40/interact/forms.html#h-17.12
---

 modules/simpletest/drupal_web_test_case.php |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)


diff --git modules/simpletest/drupal_web_test_case.php modules/simpletest/drupal_web_test_case.php
index 2c60f05..ccf67c9 100644
--- modules/simpletest/drupal_web_test_case.php
+++ modules/simpletest/drupal_web_test_case.php
@@ -1066,6 +1066,11 @@ class DrupalWebTestCase {
     $elements = $form->xpath('.//input|.//textarea|.//select');
     $submit_matches = FALSE;
     foreach ($elements as $element) {
+      // Ignore disabled elements, as those cannot be 'successful' (ie. integrated
+      // in form submission), according to http://www.w3.org/TR/REC-html40/interact/forms.html#h-17.12
+      if (isset($element['disabled'])) {
+        continue;
+      }
       // SimpleXML objects need string casting all the time.
       $name = (string) $element['name'];
       // This can either be the type of <input> or the name of the tag itself
@@ -1088,7 +1093,7 @@ class DrupalWebTestCase {
             }
             break;
           case 'checkbox':
-            // To prevent checkbox from being checked.pass in a FALSE,
+            // To prevent checkbox from being checked, pass in a FALSE,
             // otherwise the checkbox will be set to its value regardless
             // of $edit.
             if ($edit[$name] === FALSE) {