@Test public void testCompute() { final String aggName = "rows"; FieldAccessPostAggregator fieldAccessPostAggregator; fieldAccessPostAggregator = new FieldAccessPostAggregator("To be, or not to be, that is the question:", "rows"); CountAggregator agg = new CountAggregator(); Map<String, Object> metricValues = new HashMap<String, Object>(); metricValues.put(aggName, agg.get()); Assert.assertEquals(new Long(0L), fieldAccessPostAggregator.compute(metricValues)); agg.aggregate(); agg.aggregate(); agg.aggregate(); metricValues.put(aggName, agg.get()); Assert.assertEquals(new Long(3L), fieldAccessPostAggregator.compute(metricValues)); } }