public void TestCreateAndRetrieve()
{
var item = _client.CreateCustomsItem(new CustomsItem {
Description = "TShirt",
Quantity = 1,
Weight = 8,
Value = 10.0,
Currency = "USD",
}).Result;
var retrieved = _client.GetCustomsItem(item.Id).Result;
Assert.AreEqual(item.Id, retrieved.Id);
Assert.AreEqual(retrieved.Value, 10.0);
Assert.AreEqual(retrieved.Currency, "USD");
}