public virtual void GetCandlesticks_ShouldSuccess()
        {
            // Arrange
            OkexTokenAPI exchange = new OkexTokenAPI(new OkexTokenAPIStub());

            // Act (one single action only)
            IList <Candle> candles = exchange.GetCandlesticks("BTC-USDT", CandleType.OneHour, DateTime.Now.Subtract(TimeSpan.FromDays(1)), DateTime.Now);

            // Assert
            Assert.IsNotNull(candles);
        }
        public virtual void GetCandlesticks_BadSymbol_ShouldThrowException()
        {
            bool exceptionThrown = false;

            // Arrange
            OkexTokenAPI exchange = new OkexTokenAPI(new OkexTokenAPIStub());

            // Act (one single action only)
            try { exchange.GetCandlesticks(null, CandleType.OneHour, DateTime.Now.Subtract(TimeSpan.FromDays(1)), DateTime.Now); } catch (Exception) { exceptionThrown = true; }

            // Assert
            Assert.IsTrue(exceptionThrown);
        }