@Test
    void testBasicBreakdown() {
        TimeTracker t = new TimeTracker(new Chain<Searcher>(
                new UselessSearcher("first"), new UselessSearcher("second"),
                new UselessSearcher("third")));
        t.injectTimeSource(new CreativeTimeSource(new long[]{1L, 2L, 3L,
                4L, 5L, 6L, 7L}));
        t.sampleSearch(0, true);
        t.sampleSearch(1, true);
        t.sampleSearch(2, true);
        t.sampleSearch(3, true);
        t.sampleSearchReturn(2, true, null);
        t.sampleSearchReturn(1, true, null);
        t.sampleSearchReturn(0, true, null);
        SearcherTimer[] searchers = t.searcherTracking();
        checkTiming(searchers);
    }
Check sanity of TimeTracker and ElapsedTime.

@author Steinar Knutsen
container-search/src/test/java/com/yahoo/search/statistics/ElapsedTimeTestCase.java