public void Airline_Constructor_Initialises_To_Known_State_And_Properties_Work()
        {
            var airline = new Airline();

            TestUtilities.TestProperty(airline, r => r.IataCode, null, "Aa");
            TestUtilities.TestProperty(airline, r => r.IcaoCode, null, "An");
            TestUtilities.TestProperty(airline, r => r.Name, null, "Bb");
        }
        public void Airline_ToString_Returns_Standardised_Text()
        {
            var airline = new Airline();

            airline.IataCode = "IATA";
            airline.IcaoCode = "ICAO";
            airline.Name = "NAME";
            Assert.AreEqual("ICAO NAME", airline.ToString());

            airline.IcaoCode = null;
            Assert.AreEqual("IATA NAME", airline.ToString());

            airline.IcaoCode = "";
            Assert.AreEqual("IATA NAME", airline.ToString());
        }