public void SurroundIsZero()
{
Accounting sut = new Accounting();
sut.AddAccount("T", "Tillgångar", true);
sut.AddAccount("S", "Skulder", true);
sut.AddAccount("I", "Inkomster", true);
sut.AddAccount("K", "Kostnader", true);
sut.AddAccount("1010", "Kassa", false);
sut.AddAccount("1040", "Handelsbanken", false);
sut.MapParentToChild("T", "1010");
sut.MapParentToChild("S", "1040");
sut.AddTransaction("1010", "1040", 500);
var entries = new List <Tuple <string, string, decimal> >();
entries.Add(new Tuple <string, string, decimal>("1010", "1040", 500));
entries.Add(new Tuple <string, string, decimal>("1040", "1010", 200));
sut.AddTransactions(entries);
Assert.Equal(sut.Surround, 0M);
Assert.Equal(sut.AccountBalance("1010"), 500);
Assert.Equal(sut.AccountBalance("1040"), -500);
}