Feature/mqttv5 subscriptions server (#1246)

* Add support for RetainHandling. * Add support for No Local. * Add support for _SubscriptionIdentifier_. * Add more Unit Tests. * Update docs.
2026-10-20 11:45:43 +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 +1,64 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using MQTTnet.Formatter;
+using MQTTnet.Packets;
+using MQTTnet.Protocol;
+
+namespace MQTTnet.Tests.Server
+{
+    [TestClass]
+    public sealed class KeepAlive_Tests : BaseTestClass
+    {
+        [TestMethod]
+        public async Task Disconnect_Client_DueTo_KeepAlive()
+        {
+            using (var testEnvironment = CreateTestEnvironment())
+            {
+                await testEnvironment.StartServer();
+
+                var client = await testEnvironment.ConnectLowLevelClient(o => o
+                    .WithCommunicationTimeout(TimeSpan.FromSeconds(1))
+                    .WithCommunicationTimeout(TimeSpan.Zero)
+                    .WithProtocolVersion(MqttProtocolVersion.V500)).ConfigureAwait(false);
+
+                await client.SendAsync(new MqttConnectPacket
+                {
+                    CleanSession = true,
+                    ClientId = "Disconnect_Client_DueTo_KeepAlive",
+                    KeepAlivePeriod = 1
+                }, CancellationToken.None).ConfigureAwait(false);
+
+                var responsePacket = await client.ReceiveAsync(CancellationToken.None).ConfigureAwait(false);
+                Assert.IsTrue(responsePacket is MqttConnAckPacket);
+
+                for (var i = 0; i < 6; i++)
+                {
+                    await Task.Delay(500);
+                    
+                    await client.SendAsync(MqttPingReqPacket.Instance, CancellationToken.None);
+                    responsePacket = await client.ReceiveAsync(CancellationToken.None);
+                    Assert.IsTrue(responsePacket is MqttPingRespPacket);
+                }
+                
+                // If we reach this point everything works as expected (server did not close the connection
+                // due to proper ping messages.
+                // Now we will wait 1.1 seconds because the server MUST wait 1.5 seconds in total (See spec).
+
+                await Task.Delay(1100);
+                await client.SendAsync(MqttPingReqPacket.Instance, CancellationToken.None);
+                responsePacket = await client.ReceiveAsync(CancellationToken.None);
+                Assert.IsTrue(responsePacket is MqttPingRespPacket);
+
+                // Now we will wait longer than 1.5 so that the server will close the connection.
+                responsePacket = await client.ReceiveAsync(CancellationToken.None);
+
+                var disconnectPacket = responsePacket as MqttDisconnectPacket;
+
+                Assert.IsTrue(disconnectPacket != null);
+                Assert.AreEqual(disconnectPacket.ReasonCode, MqttDisconnectReasonCode.KeepAliveTimeout);
+            }
+        }
+    }
+}