/** Tests recording of enumerated histograms. */
@SmallTest
public void testRecordEnumeratedHistogram() {
String histogram = "HelloWorld.EnumeratedMetric";
HistogramDelta zeroCount = new HistogramDelta(histogram, 0);
HistogramDelta oneCount = new HistogramDelta(histogram, 1);
HistogramDelta twoCount = new HistogramDelta(histogram, 2);
final int boundary = 3;
assertEquals(0, zeroCount.getDelta());
assertEquals(0, oneCount.getDelta());
assertEquals(0, twoCount.getDelta());
RecordHistogram.recordEnumeratedHistogram(histogram, 0, boundary);
assertEquals(1, zeroCount.getDelta());
assertEquals(0, oneCount.getDelta());
assertEquals(0, twoCount.getDelta());
RecordHistogram.recordEnumeratedHistogram(histogram, 0, boundary);
assertEquals(2, zeroCount.getDelta());
assertEquals(0, oneCount.getDelta());
assertEquals(0, twoCount.getDelta());
RecordHistogram.recordEnumeratedHistogram(histogram, 2, boundary);
assertEquals(2, zeroCount.getDelta());
assertEquals(0, oneCount.getDelta());
assertEquals(1, twoCount.getDelta());
}
