Tests renaming a bundle.
function testRenameBundle() {
$type2 = strtolower($this
->randomName(8)) . '_' . 'test';
$hyphen_type2 = str_replace('_', '-', $type2);
$options = array(
'type' => $type2,
);
$this
->drupalPost('admin/structure/types/manage/' . $this->hyphen_type, $options, t('Save content type'));
$this
->drupalGet('admin/structure/types/manage/' . $hyphen_type2 . '/fields');
}