Add unit test for dotnet#3657

src/System.ServiceModel.NetTcp/tests/Channels/SecurityModeTransportWithMessageCredentialTest.cs

@@ -0,0 +1,32 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.ServiceModel.Channels;
+using System.ServiceModel.Security;
+using Infrastructure.Common;
+using Xunit;
+
+namespace System.ServiceModel.NetTcp.Tests
+{
+    public static class SecurityModeTransportWithMessageCredentialTest
+    {
+        [WcfFact]
+        public static void Init_TransportWithMessageCredentialSecurityMode()
+        {
+            NetTcpBinding binding = new NetTcpBinding(SecurityMode.TransportWithMessageCredential);
+            binding.Security.Message.ClientCredentialType = MessageCredentialType.UserName;
+            BindingElementCollection bindingElements = binding.CreateBindingElements();
+            SecurityBindingElement secutityBindingElement = bindingElements.Find<SecurityBindingElement>();
+
+            Assert.StrictEqual(binding.Security.Mode, SecurityMode.TransportWithMessageCredential);
+            Assert.True(secutityBindingElement != null, "SecurityBindingElement should not be null.");
+
+            Assert.True(binding.Security.Message.AlgorithmSuite == SecurityAlgorithmSuite.Default, "AlgorithmSuite should be Default.");
+            Assert.True(binding.Security.Message.ClientCredentialType == MessageCredentialType.UserName, "ClientCredentialType should be UserName.");
+
+            binding.Security.Message.ClientCredentialType = MessageCredentialType.Certificate;
+            Assert.True(binding.Security.Message.ClientCredentialType == MessageCredentialType.Certificate, "ClientCredentialType should be Certifiacte.");
+        }
+    }
+}

src/System.ServiceModel.NetTcp/tests/Channels/TcpTransportBindingElementTest.cs

@@ -2,7 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-
 using System;
 using System.ServiceModel.Channels;
 using Infrastructure.Common;
@@ -21,5 +20,9 @@ public static void Ctor_Default_Properties()
         // Validate only a non-null TcpConnectionPoolSetting.
         // Its own default values are validated in that type's test methods
         Assert.True(element.ConnectionPoolSettings != null, "ConnectionPoolSettings should not be null.");
+
+        // Validate a non-null ExtendedProtectionPolicy.
+        Assert.True(element.ExtendedProtectionPolicy != null, "ExtendedProtectionPolicy should not be null.");
+
     }
 }