Implemented MQTT QoS 1

test/zutil/net/mqtt/MqttBrokerTest.java

@@ -1,7 +1,7 @@
 /*
  * The MIT License (MIT)
  *
- * Copyright (c) 2020 Ziver Koc
+ * Copyright (c) 2020-2025 Ziver Koc
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -388,6 +388,32 @@ public class MqttBrokerTest {
         assertEquals( null, subscriber2.receivedPayload);
     }
 
+    @Test
+    public void publishQoS1() throws IOException {
+        // Setup broker
+        MqttBroker broker = new MqttBroker();
+        MqttConnectionThreadMock thread = new MqttConnectionThreadMock(broker);
+        MqttSubscriptionListenerMock subscriber = new MqttSubscriptionListenerMock();
+        broker.subscribe("test/topic", subscriber);
+
+        // Setup publish
+        MqttPacketPublish publish = new MqttPacketPublish();
+        publish.topicName = "test/topic";
+        publish.setFlagQoS(1);
+        publish.packetId = 33;
+        publish.payload = new byte[]{42};
+
+        thread.handlePacket(publish);
+
+        // Check response
+        assertEquals(1, thread.sentPackets.size());
+        MqttPacketPublishAck ackPacket = (MqttPacketPublishAck) thread.sentPackets.get(0);
+        assertEquals(33, ackPacket.packetId);
+
+        assertEquals("test/topic", subscriber.receivedTopic);
+        assertEquals((byte) 42, subscriber.receivedPayload[0]);
+    }
+
     @Test
     public void publishBadQos() throws IOException {
         // Setup broker