Question

我有2个类，服务器和客户端，我想测试服务器在客户端发送未知或错误的数据类型时抛出异常。

我编写了以下内容，但它不起作用，因为它不是抛出异常的Send函数：

    // Unit test
    var serverEventRaised = new ManualResetEvent( false );
    Assert.That( () =>
    {
        _server.DataReceived += ( sender, args ) =>
        {
            // Should not reach here since exception should be thrown before raising event
            Console.WriteLine( "Server received data" );
            serverEventRaised.Set();
        };

        _client.Send( new[] { "html", "<html><head><title>test</title></head><body>test</body></html>" } );
    }, Throws.Exception.TypeOf< Exception >() );

    Assert.That( serverEventRaised.WaitOne( 5000 ), Is.False );

服务器本身在引发另一个事件之前从其套接字获取事件：

    // Server class
    public event EventHandler< CustomEventArgs > DataReceived;

    private void OnMessageReceived( object sender, MySocketEventArgs args )
    {
        var dataType = args.Data[ 0 ].GetString();

        switch ( dataType )
        {
            case "text":
                // Do something
                break;
            case "image":
                // Do something else
                break;
            default:
                throw new Exception( "Unknown type" );
        }

        // Raise DataReceived event
        var handler = DataReceived;
        handler?.Invoke( this, new CustomEventArgs( args.Data[ 1 ] ) );
    }

很抱歉，如果解释难以理解，很难用一只手解释和打字:(

Answer 1

我在寻找一种做大致相同事情的方法时发现了这个问题。这是我后来采取的方法：

...
bool exceptionWasThrown = false;

try
{
   _client.Send( new[] { "html", "<html><head><title>test</title></head><body>test</body></html>" } );
}
catch(Exception e)
{
  //Check the exception details here too

   exceptionWasThrown = true;
}

Assert.IsTrue(execptionWasThrown);

Nunit，由事件处理程序

1 个答案: