@Test
public void testShuffledStatistics() {
// the purpose of this test is only to check the get/set methods
// we are aware shuffling statistics like this is really not
// something sensible to do in production ...
DescriptiveStatistics reference = createDescriptiveStatistics();
DescriptiveStatistics shuffled = createDescriptiveStatistics();
UnivariateStatistic tmp = shuffled.getGeometricMeanImpl();
shuffled.setGeometricMeanImpl(shuffled.getMeanImpl());
shuffled.setMeanImpl(shuffled.getKurtosisImpl());
shuffled.setKurtosisImpl(shuffled.getSkewnessImpl());
shuffled.setSkewnessImpl(shuffled.getVarianceImpl());
shuffled.setVarianceImpl(shuffled.getMaxImpl());
shuffled.setMaxImpl(shuffled.getMinImpl());
shuffled.setMinImpl(shuffled.getSumImpl());
shuffled.setSumImpl(shuffled.getSumsqImpl());
shuffled.setSumsqImpl(tmp);
for (int i = 100; i > 0; --i) {
reference.addValue(i);
shuffled.addValue(i);
}
Assert.assertEquals(reference.getMean(), shuffled.getGeometricMean(), 1.0e-10);
Assert.assertEquals(reference.getKurtosis(), shuffled.getMean(), 1.0e-10);
Assert.assertEquals(reference.getSkewness(), shuffled.getKurtosis(), 1.0e-10);
Assert.assertEquals(reference.getVariance(), shuffled.getSkewness(), 1.0e-10);
Assert.assertEquals(reference.getMax(), shuffled.getVariance(), 1.0e-10);
Assert.assertEquals(reference.getMin(), shuffled.getMax(), 1.0e-10);
Assert.assertEquals(reference.getSum(), shuffled.getMin(), 1.0e-10);
Assert.assertEquals(reference.getSumsq(), shuffled.getSum(), 1.0e-10);
Assert.assertEquals(reference.getGeometricMean(), shuffled.getSumsq(), 1.0e-10);
}
