### Question:
RunnableOnMaster implements TopologyEventListener, Runnable { @Override public final void run() { if (isLeader) { runOnMaster(); } }  @Override void handleTopologyEvent(TopologyEvent te); @Override final void run();  }### Answer:
@Test public void test_that_without_bind_called_not_run() { Harness harness = new Harness(); harness.run(); assertEquals(0, harness.counter.intValue()); }