public async Task CancelOrderThrows() { var user = new BinanceApiUser("api-key"); var symbol = Symbol.BTC_USDT; await Assert.ThrowsAsync <ArgumentNullException>("user", () => _client.CancelOrderAsync(null, symbol)); await Assert.ThrowsAsync <ArgumentNullException>("symbol", () => _client.CancelOrderAsync(user, null)); await Assert.ThrowsAsync <ArgumentException>(() => _client.GetOrderAsync(user, symbol)); }