public void Did_TransactionDatabase_GetMaxTransactionLength_Returns_Correct() { var transactions = new TransactionDatabase(); transactions.AddTransaction(new Transaction("A,B,C,D")); transactions.AddTransaction(new Transaction("A,B,C,D,A")); transactions.AddTransaction(new Transaction("A,B")); transactions.AddTransaction(new Transaction("A,B,C")); Assert.AreEqual(5, transactions.GetMaxTransactionLength(), "GetMaxTransactionLength is not equals to 5"); }