@Test
public void testUnknownNodeLocator() throws Exception
{

    try 
    {
        nodeLocatorService.getNode(null, null, null);
        fail("An exception should have been thrown!");
    }
    catch(IllegalArgumentException e)
    {
        //NOOP
    }
    try 
    {
        nodeLocatorService.getNode("some unknown name", null, null);
        fail("An exception should have been thrown!");
    }
    catch(IllegalArgumentException e)
    {
        //NOOP
    }
}