public function testLoadByCustomerId()
{
$customerId = 1;
$customerIdFieldName = 'customer_id';
$sharingCode = 'expected_sharing_code';
$this->eventDispatcher->expects($this->any())->method('dispatch');
$this->resource->expects($this->any())->method('getCustomerIdFieldName');
$this->resource->expects($this->once())->method('load')->with($this->logicalOr($this->wishlist, $customerId, $customerIdFieldName));
$this->mathRandom->expects($this->once())->method('getUniqueHash')->will($this->returnValue($sharingCode));
$this->assertInstanceOf('Magento\\Wishlist\\Model\\Wishlist', $this->wishlist->loadByCustomerId($customerId, true));
$this->assertEquals($customerId, $this->wishlist->getCustomerId());
$this->assertEquals($sharingCode, $this->wishlist->getSharingCode());
}