/**
* Provide a backwards compatible version of assertNotWPError for old versions of WordPress
*/
public function assertNotWPError($actual, $message = '')
{
if (is_callable('parent::assertNotWPError')) {
return parent::assertNotWPError($actual, $message);
}
if (is_wp_error($actual) && '' === $message) {
$message = $actual->get_error_message();
}
$this->assertNotInstanceOf('WP_Error', $actual, $message);
}