public void IndexOfTest()
{
LedgerBook book = getSampleBook();
Console.WriteLine("Getting item at index 3");
LedgerItem Index3 = book[3];
Console.WriteLine($"The Index Of {Index3} is: {book.IndexOf(Index3)}");
Console.WriteLine("Creating an item not in index");
LedgerItem notContainedItem = LedgerItem.Create(new DateTime(2091, 6, 27), "Budget to create rocket", LedgerItemCreateMode.Credit, 664773.68);
Console.WriteLine($"The Index Of {notContainedItem} is: {book.IndexOf(notContainedItem)}");
}
