@Test
public void should_create_day_histogram() {
// given
final StreamDateHistogramStatistics stats = new StreamDateHistogramStatistics();
stats.setNumberOfBins(4);
stats.add(LocalDateTime.of(2015, JANUARY, 5, 5, 6, 7));
stats.add(LocalDateTime.of(2015, JANUARY, 6, 0, 0, 0));
stats.add(LocalDateTime.of(2015, JANUARY, 7, 12, 58, 0));
stats.add(LocalDateTime.of(2015, JANUARY, 6, 2, 4, 45));
stats.add(LocalDateTime.of(2015, JANUARY, 5, 3, 45, 2));
stats.add(LocalDateTime.of(2015, JANUARY, 5, 9, 8, 3));
// when
final Histogram histogram = stats.getHistogram();
// then
assertThat(((DateHistogram) histogram).getPace(), is(DateManipulator.Pace.DAY));
assertThat(histogram.getItems().size(), is(3));
HistogramRange histoRange = histogram.getItems().get(0);
assertThat((long) histoRange.getRange().getMin(), is(1420416000000L));
assertThat((long) histoRange.getRange().getMax(), is(1420502400000L));
assertThat(histoRange.getOccurrences(), is(3L));
histoRange = histogram.getItems().get(1);
assertThat((long) histoRange.getRange().getMin(), is(1420502400000L));
assertThat((long) histoRange.getRange().getMax(), is(1420588800000L));
assertThat(histoRange.getOccurrences(), is(2L));
histoRange = histogram.getItems().get(2);
assertThat((long) histoRange.getRange().getMin(), is(1420588800000L));
assertThat((long) histoRange.getRange().getMax(), is(1420675200000L));
assertThat(histoRange.getOccurrences(), is(1L));
}
@Test
public void should_create_year_histogram() {
// given
final StreamDateHistogramStatistics stats = new StreamDateHistogramStatistics();
stats.setNumberOfBins(4);
stats.add(LocalDateTime.of(2013, JANUARY, 5, 8, 8));
stats.add(LocalDateTime.of(2015, JANUARY, 6, 9, 9));
stats.add(LocalDateTime.of(2015, MARCH, 15, 0, 0));
stats.add(LocalDateTime.of(2013, APRIL, 1, 12, 12));
stats.add(LocalDateTime.of(2015, MARCH, 25, 4, 10));
stats.add(LocalDateTime.of(2015, JANUARY, 5, 7, 9));
// when
final Histogram histogram = stats.getHistogram();
// then
assertThat(((DateHistogram) histogram).getPace(), is(DateManipulator.Pace.YEAR));
assertThat(histogram.getItems().size(), is(3));
HistogramRange histoRange = histogram.getItems().get(0);
assertThat((long) histoRange.getRange().getMin(), is(1356998400000L));
assertThat((long) histoRange.getRange().getMax(), is(1388534400000L));
assertThat(histoRange.getOccurrences(), is(2L));
histoRange = histogram.getItems().get(1);
assertThat((long) histoRange.getRange().getMin(), is(1388534400000L));
assertThat((long) histoRange.getRange().getMax(), is(1420070400000L));
assertThat(histoRange.getOccurrences(), is(0L));
histoRange = histogram.getItems().get(2);
assertThat((long) histoRange.getRange().getMin(), is(1420070400000L));
assertThat((long) histoRange.getRange().getMax(), is(1451606400000L));
assertThat(histoRange.getOccurrences(), is(4L));
}
@Test
public void should_create_month_histogram() {
// given
final StreamDateHistogramStatistics stats = new StreamDateHistogramStatistics();
stats.setNumberOfBins(5);
stats.add(LocalDateTime.of(2015, JANUARY, 5, 2, 4));
stats.add(LocalDateTime.of(2015, JANUARY, 6, 4, 12));
stats.add(LocalDateTime.of(2015, MARCH, 15, 16, 5));
stats.add(LocalDateTime.of(2015, APRIL, 1, 10, 2));
stats.add(LocalDateTime.of(2015, MARCH, 25, 14, 14));
stats.add(LocalDateTime.of(2015, JANUARY, 5, 2, 25));
stats.add(LocalDateTime.of(2015, JANUARY, 18, 4, 4));
// when
final Histogram histogram = stats.getHistogram();
// then
assertThat(((DateHistogram) histogram).getPace(), is(DateManipulator.Pace.MONTH));
assertThat(histogram.getItems().size(), is(4));
HistogramRange histoRange = histogram.getItems().get(0);
assertThat((long) histoRange.getRange().getMin(), is(1420070400000L));
assertThat((long) histoRange.getRange().getMax(), is(1422748800000L));
assertThat(histoRange.getOccurrences(), is(4L));
histoRange = histogram.getItems().get(1);
assertThat((long) histoRange.getRange().getMin(), is(1422748800000L));
assertThat((long) histoRange.getRange().getMax(), is(1425168000000L));
assertThat(histoRange.getOccurrences(), is(0L));
histoRange = histogram.getItems().get(2);
assertThat((long) histoRange.getRange().getMin(), is(1425168000000L));
assertThat((long) histoRange.getRange().getMax(), is(1427846400000L));
assertThat(histoRange.getOccurrences(), is(2L));
histoRange = histogram.getItems().get(3);
assertThat((long) histoRange.getRange().getMin(), is(1427846400000L));
assertThat((long) histoRange.getRange().getMax(), is(1430438400000L));
assertThat(histoRange.getOccurrences(), is(1L));
}
@Test
public void should_scale_to_geologic_time() {
// given
final StreamDateHistogramStatistics stats = new StreamDateHistogramStatistics();
stats.setNumberOfBins(4);
stats.add(LocalDateTime.of(-1_000_000, JANUARY, 5, 8, 8));
stats.add(LocalDateTime.of(100, JANUARY, 6, 9, 9));
stats.add(LocalDateTime.of(1000, MARCH, 15, 0, 0));
stats.add(LocalDateTime.of(1500, APRIL, 1, 12, 12));
stats.add(LocalDateTime.of(2000, MARCH, 25, 4, 10));
stats.add(LocalDateTime.of(1_000_000, JANUARY, 5, 7, 9));
// when
final Histogram histogram = stats.getHistogram();
// then
// Assert that it scales, e.g. the pace should be for this example 10 thousands years
// Assert that we have 3 bins
// Assert also that there is no limit about pace, it should continue to scale
// TODO implementation + assertion
}
