try to fix bug

server.test/UDPServerTest.cs

@@ -1,7 +1,29 @@
-namespace server.test.UDPServer;
+using System.Net;
+using System.Reflection;
+using System.Text;
+using Xunit.Sdk;
 
-public class UnitTest1
+namespace server.test;
+
+[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
+public class UDPServerTest : BeforeAfterTestAttribute
 {
+    const string address = "127.0.0.1";
+    const int port = 1234;
+    private static readonly UDPServer udpServer = new UDPServer(port);
+
+    public override void Before(MethodInfo methodUnderTest)
+    {
+        udpServer.Start();
+        Console.WriteLine("Start UDP Server");
+    }
+
+    public override void After(MethodInfo methodUnderTest)
+    {
+        udpServer.Stop();
+        Console.WriteLine("Stop UDP Server");
+    }
+
     [Fact]
     public void UDPDataDeepClone()
     {
@@ -33,4 +55,35 @@ public class UnitTest1
         Assert.NotEqual(udpData.Data, cloneUdpData.Data);
         Assert.NotEqual(udpData.HasRead, cloneUdpData.HasRead);
     }
+
+    [Theory]
+    [InlineData("Hello World!")]
+    [InlineData("Hello Server!")]
+    public async Task UDPServerFind(string text)
+    {
+        var serverEP = new IPEndPoint(IPAddress.Parse(address), port);
+
+
+
+        Assert.True(UDPClientPool.SendString(serverEP, [text]));
+        {
+            var ret = udpServer.FindData(address);
+            Assert.True(ret.HasValue);
+            var data = ret.Value;
+            Assert.Equal(data.Address, address);
+            Assert.Equal(data.Port, port);
+            Assert.Equal(Encoding.ASCII.GetString(data.Data), text);
+        }
+
+
+        Assert.True(await UDPClientPool.SendStringAsync(serverEP, [text]));
+        {
+            var ret = await udpServer.FindDataAsync(address);
+            Assert.True(ret.HasValue);
+            var data = ret.Value;
+            Assert.Equal(data.Address, address);
+            Assert.Equal(data.Port, port);
+            Assert.Equal(Encoding.ASCII.GetString(data.Data), text);
+        }
+    }
 }