there is the sample code how u can test stored procedure in phpunit
public function delete($userId)
{
// this function calls a stored procedure
$sql = "CALL Delete_User_Details(:userId)";
try {
$db = parent::getConnection();
$stmt = $db->prepare($sql);
$stmt->bindParam("userId", $userId);
$stmt->execute();
$id = $stmt->fetchObject();
if ($id == null) {
$delete_response->createJSONArray("DATABASE_ERROR",0);
} else {
$delete_response->createJSONArray("SUCCESS",1);
}
} catch (PDOException $e) {
$delete_response->createJSONArray("DATABASE_ERROR",0);
}
return $delete_response->toJSON();
}