public void TestTradeReader() { var reader = new TradeReader(); IList <Dictionary <string, string> > data; List <string> columns; reader.GetData(AppDomain.CurrentDomain.BaseDirectory + "\\trades.csv", "22/05/2016", out columns, out data); Assert.IsFalse(data == null); //This is a better Assert Assert.IsTrue(columns.Count == 5); // Assert was incorrect }