public void CummulativeGrowthTest()
{
var bTransactionEntry = new TransactionEntry()
{
Saldo = 248,
Date = new DateTime(2018, 06, 01).ToString("o")
};
var eTransactionEntry = new TransactionEntry()
{
Saldo = 100,
Date = new DateTime(2018, 01, 01).ToString("o")
};
var change = OperationsService.CompoundGrowthRate(bTransactionEntry, eTransactionEntry);
Assert.IsTrue(Math.Abs(change - 20) < 1);
}