Feature/mqttv5 subscriptions server (#1246)

* Add support for RetainHandling. * Add support for No Local. * Add support for _SubscriptionIdentifier_. * Add more Unit Tests. * Update docs.
2026-10-19 02:53:06 +08:00 · 2021-09-23 20:30:43 +02:00
parent feb53e78c6
commit c756a4092f
83 changed files with 2032 additions and 1237 deletions
@@ -0,0 +1,75 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using MQTTnet.Client;
+using MQTTnet.Client.Options;
+using MQTTnet.Formatter;
+
+namespace MQTTnet.Tests.Server
+{
+    [TestClass]
+    public sealed class Topic_Alias_Tests : BaseTestClass
+    {
+        [TestMethod]
+        public async Task Server_Reports_Topic_Alias_Supported()
+        {
+            using (var testEnvironment = CreateTestEnvironment())
+            {
+                await testEnvironment.StartServer();
+                
+                var client = testEnvironment.CreateClient();
+                
+                var connectResult = await client.ConnectAsync(new MqttClientOptionsBuilder()
+                    .WithProtocolVersion(MqttProtocolVersion.V500)
+                    .WithTcpServer("127.0.0.1", testEnvironment.ServerPort)
+                    .Build());
+                
+                Assert.AreEqual(connectResult.TopicAliasMaximum, ushort.MaxValue);
+            }
+        }
+        
+        [TestMethod]
+        public async Task Publish_With_Topic_Alias()
+        {
+            using (var testEnvironment = CreateTestEnvironment())
+            {
+                await testEnvironment.StartServer();
+
+                var receivedTopics = new List<string>();
+
+                var c1 = await testEnvironment.ConnectClient(options => options.WithProtocolVersion(MqttProtocolVersion.V500));
+                c1.UseApplicationMessageReceivedHandler(e =>
+                {
+                    lock (receivedTopics)
+                    {
+                        receivedTopics.Add(e.ApplicationMessage.Topic);
+                    }
+                });
+
+                await c1.SubscribeAsync("#");
+
+                var c2 = await testEnvironment.ConnectClient(options => options.WithProtocolVersion(MqttProtocolVersion.V500));
+
+                var message = new MqttApplicationMessage
+                {
+                    Topic = "this_is_the_topic",
+                    TopicAlias = 22
+                };
+
+                await c2.PublishAsync(message);
+
+                message.Topic = null;
+
+                await c2.PublishAsync(message);
+                await c2.PublishAsync(message);
+
+                await Task.Delay(500);
+
+                Assert.AreEqual(3, receivedTopics.Count);
+                CollectionAssert.AllItemsAreNotNull(receivedTopics);
+                Assert.IsTrue(receivedTopics.All(t => t.Equals("this_is_the_topic")));
+            }
+        }
+    }
+}