void assertEmpty(StatsBuffer buffer) {
assertEquals(buffer.getCount(), 0);
assertEquals(buffer.getTotalTime(), 0);
assertEquals(buffer.getMax(), 0);
assertEquals(buffer.getMin(), 0);
// the following values could be NaN
assertEquals(buffer.getMean(), 0.0);
assertEquals(buffer.getVariance(), 0.0);
assertEquals(buffer.getStdDev(), 0.0);
assertEquals(buffer.getPercentileValues()[0], 0.0);
}
@Test
public void testVarianceNoWrap() {
StatsBuffer buffer = getNoWrap();
assertEquals(buffer.getVariance(), 20916.66667, 1e-4);
}
@Test
public void testVarianceWrap() {
StatsBuffer buffer = getWithWrap();
assertEquals(buffer.getVariance(), EXPECTED_VARIANCE_WRAP, 1e-4);
}
