Tests renaming a bundle.
function testRenameBundle() {
$type2 = strtolower($this
->randomName(8)) . '_test';
$options = array(
'type' => $type2,
);
$this
->drupalPost('admin/structure/types/manage/' . $this->type, $options, t('Save content type'));
$this
->manageFieldsPage($type2);
}