extend AbstractTest class:

public class ExampleJaxmppTest extends AbstractTest {}

create test method and annote it with @Test. In addition specify test group and provide short description

@Test(groups = { "examples" }, description = "Simple test verifying logging in by the user")
public void SimpleLoginTest() {}

create an Account object, configure it, later build Jaxmpp object from it and connect to the server

Account userAccount = createAccount().setLogPrefix("test_user" ).build();
Jaxmpp jaxmpp = userAccount.createJaxmpp().build();
jaxmpp.login( true );

check whether the connection was successful

assertTrue(createJaxmpp.isConnected(), "contact was not connected" );