/**
  * @depends testFetchInventoryList
  */
 public function testGetFNSKU($o)
 {
     $get = $o->getFNSKU(0);
     $this->assertEquals('X0000000FM', $get);
     $this->assertFalse($o->getFNSKU('wrong'));
     //not number
     $this->assertFalse($this->object->getFNSKU());
     //not fetched yet for this object
 }