AbstractClientTracer extends AbstractTracer { @Override protected String getServerDigestReporterRollingKey() { return null; } AbstractClientTracer(String tracerType);   }
@Test public void getServerDigestReporterRollingKey() { String serverDigestReporterRollingKey = clientTracer.getServerDigestReporterRollingKey(); Assert.assertTrue(serverDigestReporterRollingKey == null); }