public void BeAbleToAddItsEarningsToExistingEarningsValueGivenFromAndToDates()
        {
            IDictionary <Provider, double> earningsPerProvider = new Dictionary <Provider, double>();
            Payment newPayment    = CreatePayment();
            double  expectedValue = 2000;
            double  overallValue  = 0;

            newPayment.AddThisPaymentsEarningsToOverallValue(ref overallValue, DateTime.Today, DateTime.Today);

            Assert.AreEqual(expectedValue, overallValue);
        }