### Question:
DropwizardHistogram implements Histogram { @Override public void update(long value) { histogram.update(value); } DropwizardHistogram(com.codahale.metrics.Histogram histogram); @Override void update(long value);  }### Answer:
@Test public void testUpdate() { assertEquals(0, histogram.getCount()); histogramWrapper.update(100); assertEquals(1, histogram.getCount()); assertEquals(100, histogram.getSnapshot().getValues()[0]); }