public void Throws()
{
Assert.Throws <ArgumentNullException>("symbol", () => _client.Subscribe((string)null));
Assert.Throws <ArgumentNullException>("symbol", () => _client.Subscribe(string.Empty));
Assert.Throws <ArgumentNullException>("symbol", () => _client.Unsubscribe((string)null));
Assert.Throws <ArgumentNullException>("symbol", () => _client.Unsubscribe(string.Empty));
}
/// <summary>
///
/// </summary>
/// <param name="client"></param>
/// <param name="callback"></param>
/// <param name="symbols"></param>
public static ITradeClient Subscribe(this ITradeClient client, Action <TradeEventArgs> callback, params string[] symbols)
{
Throw.IfNull(client, nameof(client));
Throw.IfNull(symbols, nameof(symbols));
if (callback == null && !symbols.Any())
{
throw new ArgumentException($"{nameof(Subscribe)}: At least one symbol is required.", nameof(symbols));
}
foreach (var symbol in symbols)
{
client.Subscribe(symbol, callback);
}
return(client);
}
/// <summary> /// /// </summary> /// <param name="client"></param> /// <param name="symbol"></param> public static ITradeClient Subscribe(this ITradeClient client, string symbol) => client.Subscribe(symbol, null);