private void runSomeTraffic(TimeTracker t) {
        t.injectTimeSource(new CreativeTimeSource(new long[] {
                1L, 2L, 3L,
                // checkpoint 1
                4L, 5L,
                // checkpoint 2
                6L, 7L, 8L, 9L,
                // checkpoint 3
                10L, 11L, 12L, 13L,
                // checkpoint 4
                14L, 15L, 16L, 17L,
                // checkpoint 5
                18L
                }));
        t.sampleSearch(0, true);
        t.sampleSearch(1, true);
        t.sampleSearch(2, true);
        // checkpoint 1
        t.sampleSearchReturn(2, true, null);
        t.sampleSearchReturn(1, true, null);
        // checkpoint 2
        t.sampleFill(1, true);
        t.sampleFill(2, true);
        t.sampleFillReturn(2, true, null);
        t.sampleFillReturn(1, true, null);
        // checkpoint 3
        t.sampleSearch(1, true);
        t.sampleSearch(2, true);
        t.sampleSearchReturn(2, true, null);
        t.sampleSearchReturn(1, true, null);
        // checkpoint 4
        t.sampleFill(1, true);
        t.sampleFill(2, true);
        t.sampleFillReturn(2, true, null);
        t.sampleFillReturn(1, true, null);
        // checkpoint 5
        t.sampleSearchReturn(0, true, null);
    }
Check sanity of TimeTracker and ElapsedTime.

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