/** Tests recording of custom times histograms. */
@SmallTest
public void testRecordCustomTimesHistogram() {
String histogram = "HelloWorld.CustomTimesMetric";
HistogramDelta zeroCount = new HistogramDelta(histogram, 0);
HistogramDelta oneCount = new HistogramDelta(histogram, 1);
HistogramDelta twoCount = new HistogramDelta(histogram, 100);
assertEquals(0, zeroCount.getDelta());
assertEquals(0, oneCount.getDelta());
assertEquals(0, twoCount.getDelta());
TimeUnit milli = TimeUnit.MILLISECONDS;
RecordHistogram.recordCustomTimesHistogram(histogram, 0, 1, 100, milli, 3);
assertEquals(1, zeroCount.getDelta());
assertEquals(0, oneCount.getDelta());
assertEquals(0, twoCount.getDelta());
RecordHistogram.recordCustomTimesHistogram(histogram, 0, 1, 100, milli, 3);
assertEquals(2, zeroCount.getDelta());
assertEquals(0, oneCount.getDelta());
assertEquals(0, twoCount.getDelta());
RecordHistogram.recordCustomTimesHistogram(histogram, 95, 1, 100, milli, 3);
assertEquals(2, zeroCount.getDelta());
assertEquals(1, oneCount.getDelta());
assertEquals(0, twoCount.getDelta());
RecordHistogram.recordCustomTimesHistogram(histogram, 200, 1, 100, milli, 3);
assertEquals(2, zeroCount.getDelta());
assertEquals(1, oneCount.getDelta());
assertEquals(1, twoCount.getDelta());
}
