public function testGetNbVisitors()
{
$this->assertInternalType('array', $this->object->getNbVisitors('TEST'));
$this->assertInternalType('array', $this->object->getNbVisitors('HOUR'));
$this->assertInternalType('array', $this->object->getNbVisitors('DAY'));
$this->assertInternalType('array', $this->object->getNbVisitors('MONTH'));
$this->assertInternalType('array', $this->object->getNbVisitors('YEAR'));
}