MqttClient - fix local disconnect after pulish + ka

src/TinyMqtt.cpp

@@ -55,6 +55,9 @@ MqttClient::MqttClient(MqttBroker* local_broker, TcpClient* new_client)
 MqttClient::MqttClient(MqttBroker* local_broker, const std::string& id)
   : local_broker(local_broker), clientId(id)
 {
+  alive = 0;
+  keep_alive = 0;
+
   if (local_broker) local_broker->addClient(this);
 }
 
@@ -281,7 +284,7 @@ void MqttClient::clientAlive(uint32_t more_seconds)
 
 void MqttClient::loop()
 {
-  if (alive && (millis() > alive))
+  if (keep_alive && (millis() >= alive))
   {
     if (local_broker)
     {

tests/local-tests/local-tests.ino

@@ -40,6 +40,34 @@ test(local_client_should_unregister_when_destroyed)
   assertEqual(broker.clientsCount(), (size_t)0);
 }
 
+test(local_client_do_not_disconnect_after_publishing)
+{
+  set_millis(0);
+  MqttBroker broker(1883);
+  MqttClient client(&broker, "client");
+  MqttClient sender(&broker, "sender");
+  broker.loop();
+
+  client.subscribe("#");
+  client.subscribe("test");
+  client.setCallback(onPublish);
+  assertEqual(broker.clientsCount(), (size_t)2);
+
+  sender.publish("test", "value");
+  broker.loop();
+
+  add_seconds(60);
+  client.loop();
+  sender.loop();
+  broker.loop();
+
+  assertEqual(broker.clientsCount(), (size_t)2);
+  assertEqual(sender.connected(), true);
+  assertEqual(client.connected(), true);
+
+  assertEqual(published.size(), (size_t)1);  // client has received something
+}
+
 #if 0
 test(local_connect)
 {