fixing player prefab being destroyed issue

Author: SamuelBellomo

Assets/Tests/Runtime/NetworkedMessageChannelTests.cs

@@ -149,15 +149,18 @@ public IEnumerator NetworkedMessagesAreStillReceivedAfterNetworkManagerShutsDown
 
             m_NbMessagesReceived = 0;
 
+            m_PlayerPrefab.SetActive(false); // to prevent NM from destroying the prefab on shutdown. This flow isn't great and is hackish, should be reworked
             // Shutdown the server and clients
-            NetcodeIntegrationTestHelpers.StopOneClient(m_ServerNetworkManager, false);
-            NetcodeIntegrationTestHelpers.StopOneClient(m_ClientNetworkManagers[0], false);
-            NetcodeIntegrationTestHelpers.StopOneClient(m_ClientNetworkManagers[1], false);
+            m_ServerNetworkManager.Shutdown();
+            m_ClientNetworkManagers[0].Shutdown();
+            m_ClientNetworkManagers[1].Shutdown();
 
             yield return new WaitWhile(() => m_ServerNetworkManager.ShutdownInProgress);
             yield return new WaitWhile(() => m_ClientNetworkManagers[0].ShutdownInProgress);
             yield return new WaitWhile(() => m_ClientNetworkManagers[1].ShutdownInProgress);
 
+            m_PlayerPrefab.SetActive(true); // reactivating after destroy prevention
+
             // Restart the server and clients
             m_ServerNetworkManager.StartHost();
             NetcodeIntegrationTestHelpers.StartOneClient(m_ClientNetworkManagers[0]);