public void ReturnsCorrectLeanSymbol()
        {
            var mapper = new InteractiveBrokersSymbolMapper();

            var symbol = mapper.GetLeanSymbol("EURUSD", SecurityType.Forex, Market.FXCM);
            Assert.AreEqual("EURUSD", symbol.Value);
            Assert.AreEqual(SecurityType.Forex, symbol.ID.SecurityType);
            Assert.AreEqual(Market.FXCM, symbol.ID.Market);

            symbol = mapper.GetLeanSymbol("AAPL", SecurityType.Equity, Market.USA);
            Assert.AreEqual("AAPL", symbol.Value);
            Assert.AreEqual(SecurityType.Equity, symbol.ID.SecurityType);
            Assert.AreEqual(Market.USA, symbol.ID.Market);
        }
        public void ThrowsOnNullOrEmptyOrInvalidSymbol()
        {
            var mapper = new InteractiveBrokersSymbolMapper();

            Assert.Throws<ArgumentException>(() => mapper.GetLeanSymbol(null, SecurityType.Forex, Market.FXCM));

            Assert.Throws<ArgumentException>(() => mapper.GetLeanSymbol("", SecurityType.Forex, Market.FXCM));

            var symbol = Symbol.Empty;
            Assert.Throws<ArgumentException>(() => mapper.GetBrokerageSymbol(symbol));

            symbol = null;
            Assert.Throws<ArgumentException>(() => mapper.GetBrokerageSymbol(symbol));

            symbol = Symbol.Create("", SecurityType.Forex, Market.FXCM);
            Assert.Throws<ArgumentException>(() => mapper.GetBrokerageSymbol(symbol));

            symbol = Symbol.Create("ABC_XYZ", SecurityType.Forex, Market.FXCM);
            Assert.Throws<ArgumentException>(() => mapper.GetBrokerageSymbol(symbol));
        }