public void SerializeMessageStatusToJson()
        {
            var messageStatus = new MessageStatus
            {
                MessageId     = 1000001,
                Recipient     = PhoneNumber.Create(4587654321),
                SendTimestamp = new DateTime(2020, 10, 10, 23, 01, 01),
                Status        = MessageDeliveryStatus.Delivered,
                UserReference = "foobar"
            };

            var resultJson = @"
{
    ""id"": 1000001,
    ""msisdn"": 4587654321,
    ""time"": 1602370861,
    ""status"": ""DELIVERED"",
    ""userref"": ""foobar""
}
";

            AssertionHelpers.AssertTwoJsonStringsAreEqual(resultJson, messageStatus.ToJson());
        }