### Question:
DiscoveryHelperFactory implements DiscoveryHelper { @Override public NodeInfo buildCurrent() { return discoveryHelper.buildCurrent(); } DiscoveryHelperFactory(); protected  DiscoveryHelperFactory(DiscoveryHelper discoveryHelper); static DiscoveryHelper provider(); @Override NodeInfo buildCurrent(); @Override void onCreate();  }### Answer:
@Test public void buildCurrent() { discoveryHelperFactory.buildCurrent(); verify(discoveryHelper).buildCurrent(); }