[Simpletest-support] webform test not following redirect

[Culley H. <cu...@fl...>]

I am once again hitting the problem of a webtest not following the 
redirect after form submission.  Here is a working example:

         $this->get('http://mudhut.org/test_form.php');
         $this->assertField('blah', '');
         $this->setField('blah', 'jabberwokky');
         $this->clickSubmit('Submit Query');
         $this->showSource();
         $this->assertWantedPattern('/jabberwokky/');

All test_form.php is doing is:

<?php
if (array_key_exists('blah', $_POST)) {
     header("Location: results.php?blah={$_POST['blah']}");
     exit;
}
?>

And results.php:

<?php
print_r($_GET);
?>