### Question:
LatencyFaultToleranceImpl implements LatencyFaultTolerance<String> { @Override public String pickOneAtLeast() { final Enumeration<FaultItem> elements = this.faultItemTable.elements(); List<FaultItem> tmpList = new LinkedList<>(); while (elements.hasMoreElements()) { final FaultItem faultItem = elements.nextElement(); tmpList.add(faultItem); } if (!tmpList.isEmpty()) { Collections.shuffle(tmpList); Collections.sort(tmpList); final int half = tmpList.size() / 2; if (half <= 0) { return tmpList.get(0).getName(); } else { final int i = this.whichItemWorst.getAndIncrement() % half; return tmpList.get(i).getName(); } } return null; }  @Override void updateFaultItem(final String name, final long currentLatency, final long notAvailableDuration); @Override boolean isAvailable(final String name); @Override void remove(final String name); @Override String pickOneAtLeast(); @Override String toString();  }### Answer:
@Test public void testPickOneAtLeast() throws Exception { latencyFaultTolerance.updateFaultItem(brokerName, 1000, 3000); assertThat(latencyFaultTolerance.pickOneAtLeast()).isEqualTo(brokerName); latencyFaultTolerance.updateFaultItem(anotherBrokerName, 1001, 3000); assertThat(latencyFaultTolerance.pickOneAtLeast()).isEqualTo(brokerName); }