AbstractServerTracer extends AbstractTracer { protected String getClientDigestReporterRollingKey() { return null; } AbstractServerTracer(String tracerType);   }
@Test public void getClientDigestReporterRollingKey() { String clientDigestReporterRollingKey = serverTracer.getClientDigestReporterRollingKey(); Assert.assertTrue(clientDigestReporterRollingKey == null); }