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Merged
jskeet merged 1 commit into from
Apr 27, 2026
Merged

Dynamic mqtt port for unit tests #346

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16 changes: 9 additions & 7 deletions test/CloudNative.CloudEvents.UnitTests/Mqtt/MqttTest.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@
// Licensed under the Apache 2.0 license.
// See LICENSE file in the project root for full license information.

using CloudNative.CloudEvents.NewtonsoftJson;
using CloudNative.CloudEvents.SystemTextJson;
using MQTTnet;
using MQTTnet.Client;
using MQTTnet.Server;
Expand All @@ -17,16 +17,19 @@ namespace CloudNative.CloudEvents.Mqtt.UnitTests;
public class MqttTest : IDisposable
{
private readonly MqttServer mqttServer;
private readonly int mqttServerPort;

public MqttTest()
{
var optionsBuilder = new MqttServerOptionsBuilder()
var options = new MqttServerOptionsBuilder()
.WithConnectionBacklog(100)
.WithDefaultEndpoint()
.WithDefaultEndpointPort(52355);
.WithDefaultEndpointPort(0) // 0 means randomly assigning a port during server startup, prevents conflicts with other tests
.WithDefaultEndpoint().Build();

this.mqttServer = new MqttFactory().CreateMqttServer(optionsBuilder.Build());
this.mqttServer = new MqttFactory().CreateMqttServer(options);
mqttServer.StartAsync().GetAwaiter().GetResult();

this.mqttServerPort = options.DefaultEndpointOptions.Port; // port only gets assigned after the server starts, read it earlier and it stays 0
}

public void Dispose()
Expand All @@ -37,7 +40,6 @@ public void Dispose()
[Fact]
public async Task MqttSendTest()
{

var jsonEventFormatter = new JsonEventFormatter();
var cloudEvent = new CloudEvent
{
Expand All @@ -54,7 +56,7 @@ public async Task MqttSendTest()

var options = new MqttClientOptionsBuilder()
.WithClientId("Client1")
.WithTcpServer("127.0.0.1", 52355)
.WithTcpServer("127.0.0.1", mqttServerPort)
.WithCleanSession()
.Build();

Expand Down