@Test
public strictfp void testSignificant_Never() {
ListStatistics s1 = new ListStatistics();
ListStatistics s2 = new ListStatistics();
for (int c = 0; c < 10; c++) {
s1.addValue(1);
s1.addValue(1.1);
s2.addValue(1);
s2.addValue(1.1);
}
for (double conf : new double[] {0.5, 0.9, 0.99, 0.999, 0.9999, 0.99999}) {
Assert.assertFalse("Diff not significant at " + conf, s1.isDifferent(s2, conf));
Assert.assertEquals(0, s1.compareTo(s2, conf));
}
}
/** Test of add method, of class Statistics. */
@Test
public strictfp void testAdd_double() {
ListStatistics stats = new ListStatistics();
stats.addValue(VALUES[0]);
assertEquals(1, stats.getN());
assertEquals(VALUES[0], stats.getSum(), 0.0);
assertEquals(VALUES[0], stats.getMax(), 0.0);
assertEquals(VALUES[0], stats.getMin(), 0.0);
assertEquals(VALUES[0], stats.getMean(), 0.0);
assertEquals(Double.NaN, stats.getVariance(), 0.0);
assertEquals(Double.NaN, stats.getStandardDeviation(), 0.0);
}
@Test
public strictfp void testSignificant_Sometimes() {
ListStatistics s1 = new ListStatistics();
ListStatistics s2 = new ListStatistics();
for (int c = 0; c < 10; c++) {
s1.addValue(1);
s1.addValue(2);
s2.addValue(1);
s2.addValue(3);
}
Assert.assertTrue("Diff significant at 0.5", s1.isDifferent(s2, 0.5));
Assert.assertTrue("Diff significant at 0.9", s1.isDifferent(s2, 0.9));
Assert.assertFalse("Diff not significant at 0.99", s1.isDifferent(s2, 0.99));
Assert.assertFalse("Diff not significant at 0.999", s1.isDifferent(s2, 0.999));
Assert.assertFalse("Diff not significant at 0.9999", s1.isDifferent(s2, 0.9999));
Assert.assertEquals("compareTo at 0.5", 1, s1.compareTo(s2, 0.5));
Assert.assertEquals("compareTo at 0.9", 1, s1.compareTo(s2, 0.9));
Assert.assertEquals("compareTo at 0.99", 0, s1.compareTo(s2, 0.99));
Assert.assertEquals("compareTo at 0.999", 0, s1.compareTo(s2, 0.999));
Assert.assertEquals("compareTo at 0.9999", 0, s1.compareTo(s2, 0.9999));
}
@Test
public strictfp void testSingle() {
ListStatistics s = new ListStatistics();
s.addValue(42.0D);
Assert.assertEquals(1, s.getN());
Assert.assertEquals(42.0D, s.getSum());
Assert.assertEquals(42.0D, s.getMin());
Assert.assertEquals(42.0D, s.getMax());
Assert.assertEquals(42.0D, s.getMean());
Assert.assertEquals(Double.NaN, s.getMeanErrorAt(0.5));
Assert.assertEquals(Double.NaN, s.getVariance());
Assert.assertEquals(Double.NaN, s.getStandardDeviation());
Assert.assertEquals(Double.NaN, s.getConfidenceIntervalAt(0.50)[0]);
Assert.assertEquals(Double.NaN, s.getConfidenceIntervalAt(0.50)[1]);
Assert.assertEquals(42.0D, s.getPercentile(0));
Assert.assertEquals(42.0D, s.getPercentile(100));
}
@BeforeClass
public static void setUpClass() throws Exception {
for (double value : VALUES) {
instance.addValue(value);
}
}
