@Test
  public void testSummary_List_Double() {
    logger.info("\ntesting summary(List<Double> list)");
    List<Double> input = null;
    Summary result = null;
    result = MathUtil.summary(input);
    if (result == null) {
      fail("summary was null");
    }
    /*public double min;
    public double firstQ;
    public double median;
    public double mean;
    public double thirdQ;
    public double max;
    public double sd*/
    assertEquals(0.0, result.min, 0.0);
    assertEquals(0.0, result.firstQ, 0.0);
    assertEquals(0.0, result.median, 0.0);
    assertEquals(0.0, result.mean, 0.0);
    assertEquals(0.0, result.thirdQ, 0.0);
    assertEquals(0.0, result.max, 0.0);
    assertEquals(0.0, result.sd, 0.0);

    input = new ArrayList<Double>();
    result = MathUtil.summary(input);
    assertEquals(0.0, result.min, 0.0);
    assertEquals(0.0, result.firstQ, 0.0);
    assertEquals(0.0, result.median, 0.0);
    assertEquals(0.0, result.mean, 0.0);
    assertEquals(0.0, result.thirdQ, 0.0);
    assertEquals(0.0, result.max, 0.0);
    assertEquals(0.0, result.sd, 0.0);

    input.add(1.0);
    input.add(2.0);
    input.add(3.0);
    input.add(4.0);
    result = MathUtil.summary(input);
    assertEquals(1.0, result.min, 0.0);
    // assertEquals(1.75, result.firstQ, 0.0);
    assertEquals(2.5, result.median, 0.0);
    assertEquals(2.5, result.mean, 0.0);
    // assertEquals(3.25, result.thirdQ, 0.0);
    assertEquals(4.0, result.max, 0.0);
    assertEquals(1.290994, result.sd, 0.0001);
  }
  @Test
  public void testSummary_double_array() {
    logger.info("\ntesting summary(double[] array)");
    double[] input = null;

    input = new double[] {1, 2, 3, 4};
    Summary result = MathUtil.summary(input);
    assertEquals(1.0, result.min, 0.0);
    assertEquals(2.5, result.median, 0.0);
    assertEquals(2.5, result.mean, 0.0);
    assertEquals(4, result.max, 0.0);
    assertEquals(1.290994, result.sd, 0.0001);
  }