$this->assertEqual($entity_type[$t_key][$key],$val,format_string('Field type %t_key key %key is %value',array('%t_key'=>$t_key,'%key'=>$key,'%value'=>print_r($val,TRUE))));
$this->assertTrue($this->xpath('//select[@id="edit-fields-add-new-field-type"]//option[@value=:field_type]',array(':field_type'=>$field_type)),String::format('Configurable field type @field_type is available.',array('@field_type'=>$field_type)));