private void AssertStatement(string[] shows, float[] showCosts, float totalCost, int frequentPoints) { var showList = ""; if (shows[0] != null) { for (var i = 0; i < shows.Length; i++) { showList += "\t" + shows[i] + "\t" + showCosts[i] + "\n"; } } Assert.Equal( "Rental Record for Joe\n" + showList + "Amount owed is " + totalCost + "\n" + "You earned " + frequentPoints + " frequent renter points", customer.Statement()); }