public void TestGetOver()
{
ICurrencyHolder holder = new CurrencyHolder(new List <ICurrencyNotation>()
{
new CurrencyNotation("Test1", 10, 2),
new CurrencyNotation("Test2", 100, 2),
});
var h1 = holder.GetClosestOver(5);
var h2 = holder.GetClosestOver(11);
Assert.AreEqual("Test1", h1.Name);
Assert.AreEqual("Test2", h2.Name);
}