public function testAdd()
{
$productId = 'pe4OowbHVULEWICFN1t6iy2BPWXA';
$skuInfo = '';
$stock = new Stock($this->http);
$response = $stock->add($productId, 100);
$this->assertTrue($response);
$stock = new Stock($this->http);
$response = $stock->add($productId, '100');
$this->assertTrue($response);
}
