@Test
public void testIsUsernameRegistered() {

	TestUserProxy user = new TestUserProxy(testLobby, "RegisteredName");
	testLobby.addUserProxy(user);
	
	assertEquals(true, testLobby.isUsernameRegistered("RegisteredName"));
	assertEquals(false, testLobby.isUsernameRegistered("NotRegistered"));
	assertEquals(false, testLobby.isUsernameRegistered(null));
}