diff --git a/src/TinyMqtt.h b/src/TinyMqtt.h
index 664e3e8..d40e959 100644
--- a/src/TinyMqtt.h
+++ b/src/TinyMqtt.h
@@ -121,6 +121,7 @@ class MqttClient
 	};
 	public:
 		MqttClient(MqttBroker*);
+		MqttClient(MqttBroker* brk, const std::string& id) : MqttClient(brk) { clientId=id; }
 		MqttClient() : MqttClient(nullptr) {};
 
 		~MqttClient();
@@ -225,6 +226,8 @@ class MqttBroker
 		void connect(std::string host, uint32_t port=1883);
 		bool connected() const { return state == Connected; }
 
+		size_t clientsCount() const { return clients.size(); }
+
 		void dump()
 		{
 			Serial << clients.size() << " client/s" << endl;
diff --git a/tests/tinymqtt-tests/tinymqtt-tests.ino b/tests/tinymqtt-tests/tinymqtt-tests.ino
new file mode 100644
index 0000000..a8c6dad
--- /dev/null
+++ b/tests/tinymqtt-tests/tinymqtt-tests.ino
@@ -0,0 +1,138 @@
+#include <AUnit.h>
+#include <TinyMqtt.h>
+#include <map>
+
+/**
+  * TinyMqtt local unit tests.
+	*
+	* No wifi connection unit tests.
+	**/
+
+using namespace std;
+
+MqttBroker broker(1883);
+
+std::map<std::string, std::map<Topic, int>>	published;		// map[client_id] => map[topic] = count
+
+void onPublish(const MqttClient* srce, const Topic& topic, const char* payload, size_t length)
+{
+	if (srce)
+		published[srce->id()][topic]++;
+}
+
+test(local_client_should_unregister_when_destroyed)
+{
+	assertEqual(broker.clientsCount(), (size_t)0);
+	{
+		MqttClient client(&broker);
+		assertEqual(broker.clientsCount(), (size_t)1);
+	}
+	assertEqual(broker.clientsCount(), (size_t)0);
+}
+
+test(local_connect)
+{
+	assertEqual(broker.clientsCount(), (size_t)0);
+
+	MqttClient client(&broker);
+	assertTrue(client.connected());
+	assertEqual(broker.clientsCount(), (size_t)1);
+}
+
+test(local_publish_should_be_dispatched)
+{
+	published.clear();
+	assertEqual(broker.clientsCount(), (size_t)0);
+
+	MqttClient subscriber(&broker);
+	subscriber.subscribe("a/b");
+	subscriber.subscribe("a/c");
+	subscriber.setCallback(onPublish);
+
+	MqttClient publisher(&broker);
+	publisher.publish("a/b");
+	publisher.publish("a/c");
+	publisher.publish("a/c");
+
+	assertEqual(published.size(), (size_t)1);	// 1 client has received something
+	assertTrue(published[""]["a/b"] == 1);
+	assertTrue(published[""]["a/c"] == 2);
+}
+
+test(local_publish_should_be_dispatched_to_local_clients)
+{
+	published.clear();
+	assertEqual(broker.clientsCount(), (size_t)0);
+
+	MqttClient subscriber_a(&broker, "A");
+	subscriber_a.setCallback(onPublish);
+	subscriber_a.subscribe("a/b");
+	subscriber_a.subscribe("a/c");
+
+	MqttClient subscriber_b(&broker, "B");
+	subscriber_b.setCallback(onPublish);
+	subscriber_b.subscribe("a/b");
+
+	MqttClient publisher(&broker);
+	publisher.publish("a/b");
+	publisher.publish("a/c");
+
+	assertEqual(published.size(), (size_t)2);	// 2 clients have received something
+	assertTrue(published["A"]["a/b"] == 1);
+	assertTrue(published["A"]["a/c"] == 1);
+	assertTrue(published["B"]["a/b"] == 1);
+	assertTrue(published["B"]["a/c"] == 0);
+}
+
+test(local_unsubscribe)
+{
+	published.clear();
+	assertEqual(broker.clientsCount(), (size_t)0);
+
+	MqttClient subscriber(&broker);
+	subscriber.setCallback(onPublish);
+	subscriber.subscribe("a/b");
+
+	MqttClient publisher(&broker);
+	publisher.publish("a/b");
+
+	// subscriber.unsubscribe("a/b");		TODO not yet implemented
+
+	publisher.publish("a/b");
+
+	assertTrue(published[""]["a/b"] == 1);	// Only one publish has been received
+}
+
+test(local_nocallback_when_destroyed)
+{
+	published.clear();
+	assertEqual(broker.clientsCount(), (size_t)0);
+
+	{
+		MqttClient subscriber(&broker);
+		subscriber.setCallback(onPublish);
+		subscriber.subscribe("a/b");
+	}
+
+	MqttClient publisher(&broker);
+	publisher.publish("a/b");
+
+	assertEqual(published.size(), (size_t)0);	// Only one publish has been received
+}
+
+
+//----------------------------------------------------------------------------
+// setup() and loop()
+void setup() {
+  delay(1000);
+  Serial.begin(115200);
+  while(!Serial);
+
+	Serial.println("=============[ NO WIFI CONNECTION TinyMqtt TESTS ]========================");
+}
+
+void loop() {
+  aunit::TestRunner::run();
+
+	if (Serial.available()) ESP.reset();
+}