public async Task CanReceiveMulticastPacket()
{
var multicastIp = IPAddress.Parse("239.0.0.1");
var ep = new IPEndPoint(IPAddress.Loopback, UdpPort);
var service = new UdpService(ep);
service.JoinMulticastGroup(multicastIp);
service.LocalEndPoint.Should().Be(ep, "because this value was set in the constructor");
service.MulticastGroups.Should().BeEquivalentTo(new[] { multicastIp }, "because this value was set in the constructor");
var data = System.Text.Encoding.UTF8.GetBytes("Test");
var host = new UdpClient();
service.PacketReceived += (s, e) =>
e.Buffer.Should().BeEquivalentTo(data, "because we should receive the test data exactly");
using (var monitoredService = service.Monitor())
{
service.StartListening();
int bytesSent = await host.SendAsync(data, data.Length, new IPEndPoint(multicastIp, ep.Port));
bytesSent.Should().Be(data.Length, "because the test data is this long");
// Allow some time to receive the packet
await Task.Delay(100);
monitoredService.Should().Raise(nameof(service.PacketReceived), "because the event should be raised upon receiving a packet");
}
host.Dispose();
service.Dispose();
}
public void CanManageListeningState()
{
var service = new UdpService(new IPEndPoint(IPAddress.Loopback, UdpPort));
service.IsListening.Should().BeFalse("because the service is not listening");
service.Invoking(s => s.StopListeningAsync())
.Should().Throw <InvalidOperationException>("because the service is not listening");
service.StartListening();
service.IsListening.Should().BeTrue("because the service is listening");
service.Invoking(s => s.StartListening())
.Should().Throw <InvalidOperationException>("because the service is already listening");
service.Dispose();
}