protected function tearDown()
{
$tables = array();
$res = $this->mysqli->query("SELECT TABLE_NAME FROM information_schema.tables where TABLE_SCHEMA='Halite'");
while ($row = $res->fetch_assoc()) {
array_push($tables, $row['TABLE_NAME']);
}
foreach ($tables as $table) {
$this->mysqli->query("DELETE FROM " . $table);
}
}