feat : 패킷 전송완료 개수 시간 체크 기능 추가

ClientTester/EchoClientTester/EchoDummyService/DummyClients.cs

@@ -19,6 +19,13 @@ public class DummyClients
     private ConcurrentDictionary<int, long> pendingPings = new();
     private int seqNumber;
 
+    // 유닛 테스트용 (0 = 제한 없음)
+    public int TestCount
+    {
+        get;
+        set;
+    } = 0;
+
     // 통계
     public int SentCount
     {
@@ -81,6 +88,12 @@ public class DummyClients
             }
 
             ReceivedCount++;
+
+            if (TestCount > 0 && ReceivedCount >= TestCount)
+            {
+                peer.Disconnect();
+            }
+
             reader.Recycle();
         };