public void AddUpdate_Updates()
{
target.AddUpdate("TestUserName", new Address { Id = "address1", AddressType = AddressType.Shipping, FirstName = "TestFName"});
target.AddUpdate("TestUserName", new Address { Id = "address1", AddressType = AddressType.Shipping, FirstName = "TestFirstName" });
Assert.AreEqual(1, target.GetAll("TestUserName").Count());
Assert.AreEqual("TestFirstName", target.GetAll("TestUserName").First().FirstName);
}