fixed clients overlapping from one test to another by:

- adding client and server wrappers to verify the clientid starts with the testname
- adding disposable baseclass
- clear disconnect handler from client so it does not try to reconnect after it is disposed
- moved code from dispose to cleanup in case it is called in a stop method as dispose may only be called once while start / stop may be called multiple times

Tests/MQTTnet.Core.Tests/MqttClient_Tests.cs

@@ -20,10 +20,12 @@ namespace MQTTnet.Tests
     [TestClass]
     public class Client_Tests
     {
+        public TestContext TestContext { get; set; }
+
         [TestMethod]
         public async Task Send_Reply_In_Message_Handler_For_Same_Client()
         {
-            using (var testEnvironment = new TestEnvironment())
+            using (var testEnvironment = new TestEnvironment(TestContext))
             {
                 await testEnvironment.StartServerAsync();
                 var client = await testEnvironment.ConnectClientAsync();
@@ -57,7 +59,7 @@ namespace MQTTnet.Tests
         [TestMethod]
         public async Task Send_Reply_In_Message_Handler()
         {
-            using (var testEnvironment = new TestEnvironment())
+            using (var testEnvironment = new TestEnvironment(TestContext))
             {
                 await testEnvironment.StartServerAsync();
                 var client1 = await testEnvironment.ConnectClientAsync();
@@ -89,7 +91,7 @@ namespace MQTTnet.Tests
         [TestMethod]
         public async Task Reconnect()
         {
-            using (var testEnvironment = new TestEnvironment())
+            using (var testEnvironment = new TestEnvironment(TestContext))
             {
                 var server = await testEnvironment.StartServerAsync();
                 var client = await testEnvironment.ConnectClientAsync();
@@ -112,7 +114,7 @@ namespace MQTTnet.Tests
         [TestMethod]
         public async Task Reconnect_While_Server_Offline()
         {
-            using (var testEnvironment = new TestEnvironment())
+            using (var testEnvironment = new TestEnvironment(TestContext))
             {
                 testEnvironment.IgnoreClientLogErrors = true;
 
@@ -149,7 +151,7 @@ namespace MQTTnet.Tests
         [TestMethod]
         public async Task Reconnect_From_Disconnected_Event()
         {
-            using (var testEnvironment = new TestEnvironment())
+            using (var testEnvironment = new TestEnvironment(TestContext))
             {
                 testEnvironment.IgnoreClientLogErrors = true;
 
@@ -189,7 +191,7 @@ namespace MQTTnet.Tests
         [TestMethod]
         public async Task PacketIdentifier_In_Publish_Result()
         {
-            using (var testEnvironment = new TestEnvironment())
+            using (var testEnvironment = new TestEnvironment(TestContext))
             {
                 await testEnvironment.StartServerAsync();
                 var client = await testEnvironment.ConnectClientAsync();
@@ -238,7 +240,7 @@ namespace MQTTnet.Tests
         [TestMethod]
         public async Task Fire_Disconnected_Event_On_Server_Shutdown()
         {
-            using (var testEnvironment = new TestEnvironment())
+            using (var testEnvironment = new TestEnvironment(TestContext))
             {
                 var server = await testEnvironment.StartServerAsync();
                 var client = await testEnvironment.ConnectClientAsync();
@@ -290,7 +292,7 @@ namespace MQTTnet.Tests
             // is an issue).
             const int MessagesCount = 50;
 
-            using (var testEnvironment = new TestEnvironment())
+            using (var testEnvironment = new TestEnvironment(TestContext))
             {
                 await testEnvironment.StartServerAsync();
 
@@ -330,7 +332,7 @@ namespace MQTTnet.Tests
         [TestMethod]
         public async Task Send_Reply_For_Any_Received_Message()
         {
-            using (var testEnvironment = new TestEnvironment())
+            using (var testEnvironment = new TestEnvironment(TestContext))
             {
                 await testEnvironment.StartServerAsync();
 
@@ -374,7 +376,7 @@ namespace MQTTnet.Tests
         [TestMethod]
         public async Task Publish_With_Correct_Retain_Flag()
         {
-            using (var testEnvironment = new TestEnvironment())
+            using (var testEnvironment = new TestEnvironment(TestContext))
             {
                 await testEnvironment.StartServerAsync();
 
@@ -405,7 +407,7 @@ namespace MQTTnet.Tests
         [TestMethod]
         public async Task Subscribe_In_Callback_Events()
         {
-            using (var testEnvironment = new TestEnvironment())
+            using (var testEnvironment = new TestEnvironment(TestContext))
             {
                 await testEnvironment.StartServerAsync();
 
@@ -444,7 +446,7 @@ namespace MQTTnet.Tests
         [TestMethod]
         public async Task Message_Send_Retry()
         {
-            using (var testEnvironment = new TestEnvironment())
+            using (var testEnvironment = new TestEnvironment(TestContext))
             {
                 testEnvironment.IgnoreClientLogErrors = true;
                 testEnvironment.IgnoreServerLogErrors = true;
@@ -488,7 +490,7 @@ namespace MQTTnet.Tests
         [TestMethod]
         public async Task NoConnectedHandler_Connect_DoesNotThrowException()
         {
-            using (var testEnvironment = new TestEnvironment())
+            using (var testEnvironment = new TestEnvironment(TestContext))
             {
                 await testEnvironment.StartServerAsync();
 
@@ -501,7 +503,7 @@ namespace MQTTnet.Tests
         [TestMethod]
         public async Task NoDisconnectedHandler_Disconnect_DoesNotThrowException()
         {
-            using (var testEnvironment = new TestEnvironment())
+            using (var testEnvironment = new TestEnvironment(TestContext))
             {
                 await testEnvironment.StartServerAsync();
                 var client = await testEnvironment.ConnectClientAsync();
@@ -516,7 +518,7 @@ namespace MQTTnet.Tests
         [TestMethod]
         public async Task Frequent_Connects()
         {
-            using (var testEnvironment = new TestEnvironment())
+            using (var testEnvironment = new TestEnvironment(TestContext))
             {
                 await testEnvironment.StartServerAsync();
 
@@ -560,7 +562,7 @@ namespace MQTTnet.Tests
         [TestMethod]
         public async Task No_Payload()
         {
-            using (var testEnvironment = new TestEnvironment())
+            using (var testEnvironment = new TestEnvironment(TestContext))
             {
                 await testEnvironment.StartServerAsync();