Add support for certificate validation callback for Web Socket connections.

Tests/MQTTnet.Core.Tests/BlockingQueue_Tests.cs

@@ -1,7 +1,8 @@
-using System.Threading;
-using System.Threading.Tasks;
-using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
 using MQTTnet.Internal;
+using System;
+using System.Threading;
+using System.Threading.Tasks;
 
 namespace MQTTnet.Tests
 {
@@ -33,7 +34,7 @@ namespace MQTTnet.Tests
 
             Assert.AreEqual("a", queue.RemoveFirst());
             Assert.AreEqual("b", queue.RemoveFirst());
-            
+
             Assert.AreEqual(1, queue.Count);
 
             Assert.AreEqual("c", queue.Dequeue());
@@ -81,7 +82,7 @@ namespace MQTTnet.Tests
         }
 
         [TestMethod]
-        public void Wait_For_Times()
+        public void Wait_For_Items()
         {
             var number = 0;
 
@@ -104,5 +105,21 @@ namespace MQTTnet.Tests
                 Interlocked.Increment(ref number);
             }
         }
+
+        [TestMethod]
+        [ExpectedException(typeof(OperationCanceledException))]
+        public void Use_Disposed_Queue()
+        {
+            var queue = new BlockingQueue<int>();
+#pragma warning disable CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
+            Task.Run(() =>
+            {
+                Thread.Sleep(1000);
+                queue.Dispose();
+            });
+#pragma warning restore CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
+
+            queue.Dequeue(new CancellationTokenSource(TimeSpan.FromSeconds(2)).Token);
+        }
     }
-}
+}

Tests/MQTTnet.Core.Tests/MqttClient_Tests.cs

@@ -23,6 +23,18 @@ namespace MQTTnet.Tests
     {
         public TestContext TestContext { get; set; }
 
+        [TestMethod]
+        public async Task Send_Manual_Ping()
+        {
+            using (var testEnvironment = new TestEnvironment(TestContext))
+            {
+                await testEnvironment.StartServerAsync();
+                var client = await testEnvironment.ConnectClientAsync();
+
+                await client.PingAsync(CancellationToken.None);
+            }
+        }
+
         [TestMethod]
         public async Task Send_Reply_In_Message_Handler_For_Same_Client()
         {

Tests/MQTTnet.TestApp.NetCore/Program.cs

@@ -1,15 +1,13 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Net.Security;
-using System.Security.Cryptography.X509Certificates;
-using System.Threading;
-using System.Threading.Tasks;
-using MQTTnet.Client;
-using MQTTnet.Client.Options;
+using MQTTnet.Client.Options;
 using MQTTnet.Diagnostics;
 using MQTTnet.Server;
 using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Net.Security;
+using System.Threading;
+using System.Threading.Tasks;
 
 namespace MQTTnet.TestApp.NetCore
 {
@@ -129,10 +127,15 @@ namespace MQTTnet.TestApp.NetCore
             var options = new MqttClientOptionsBuilder()
                 .WithTls(new MqttClientOptionsBuilderTlsParameters
                 {
-                    CertificateValidationCallback = (X509Certificate x, X509Chain y, SslPolicyErrors z, IMqttClientOptions o) =>
+                    CertificateValidationHandler = context =>
                         {
-                            // TODO: Check conditions of certificate by using above parameters.
-                            return true;
+                            // TODO: Check conditions of certificate by using above context.
+                            if (context.SslPolicyErrors == SslPolicyErrors.None)
+                            {
+                                return true;
+                            }
+
+                            return false;
                         }
                 })
                 .Build();