src.ccc = " ";
        final DestBean dest = new DestBean();
        BeanUtil.copyBeanToBean(src, dest);
        assertThat(dest.ccc, is(" "));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testCopyBeanToBean_excludesWhitespace() throws Exception {
        final SrcBean src = new SrcBean();
        src.ccc = " ";
        final DestBean dest = new DestBean();

    }
  }

  @GwtIncompatible // DoubleMath.mean
  public void testMean_intVarargs() {
    assertEquals(-13.75, DoubleMath.mean(11, -22, 44, -88), 1.0e-10);
    assertEquals(11.0, DoubleMath.mean(11), 1.0e-10);
  }

  @GwtIncompatible // DoubleMath.mean
  public void testMean_longVarargs() {
    assertEquals(-13.75, DoubleMath.mean(11L, -22L, 44L, -88L), 1.0e-10);

 *
 * copyBeanToBean(srcBean, destBean);
 * </pre>
 * <p>
 * JavaBeansから{@link Map}あるいは{@link Map}からJavaBeansへコピーすることも出来ます。
 * </p>
 *
 * <pre>
 * copyBeanToMap(srcBean, destMap);
 * copyMapToBean(srcMap, destBean);
 * </pre>
 * <p>
 * コピー先となるJavaBeansまたは{@link Map}のインスタンスを新たに生成してコピーすることも出来ます。
 * </p>
 *
 * <pre>
 * DestBean destBean = copyBeanToNewBean(srcBean, DestBean.class);

    }
  }

  @GwtIncompatible // DoubleMath.mean
  public void testMean_intVarargs() {
    assertEquals(-13.75, DoubleMath.mean(11, -22, 44, -88), 1.0e-10);
    assertEquals(11.0, DoubleMath.mean(11), 1.0e-10);
  }

  @GwtIncompatible // DoubleMath.mean
  public void testMean_longVarargs() {
    assertEquals(-13.75, DoubleMath.mean(11L, -22L, 44L, -88L), 1.0e-10);

 *
 * <pre>
 * import static org.codelibs.core.beans.util.CopyOptionsUtil.*;
 *
 * copyBeanToBean(srcBean, destBean, excludeNull());
 * </pre>
 * <p>
 * {@literal CopyOptionsUtil}の戻り値は{@link CopyOptions}
 * なので、メソッドチェーンでオプションを複数指定することもできます。
 * </p>
 *
 * <pre>
 * copyBeanToBean(srcBean, destBean, excludeNull().dateConverter("date", "MM/dd"));
 * </pre>
 *
 * @author koichik
 */

      } catch (IllegalArgumentException expected) {
      }
    }
  }

  @AndroidIncompatible // slow
  @GwtIncompatible // java.math.BigInteger
  public void testMean() {
    // Odd-sized ranges have an obvious mean
    assertMean(2, 1, 3);

    assertMean(-2, -3, -1);
    assertMean(0, -1, 1);
    assertMean(1, -1, 3);
    assertMean((1 << 30) - 1, -1, Integer.MAX_VALUE);

    long sqrtMaxLong = (long) Math.sqrt(Long.MAX_VALUE);
    assertTrue(sqrtMaxLong <= LongMath.FLOOR_SQRT_MAX_LONG);
  }

  @AndroidIncompatible // slow
  @GwtIncompatible // java.math.BigInteger
  public void testMean() {
    // Odd-sized ranges have an obvious mean
    assertMean(2, 1, 3);

    assertMean(-2, -3, -1);
    assertMean(0, -1, 1);
    assertMean(1, -1, 3);
    assertMean((1L << 62) - 1, -1, Long.MAX_VALUE);

    long sqrtMaxLong = (long) Math.sqrt(Long.MAX_VALUE);
    assertTrue(sqrtMaxLong <= LongMath.FLOOR_SQRT_MAX_LONG);
  }

  @AndroidIncompatible // slow
  @GwtIncompatible // java.math.BigInteger
  public void testMean() {
    // Odd-sized ranges have an obvious mean
    assertMean(2, 1, 3);

    assertMean(-2, -3, -1);
    assertMean(0, -1, 1);
    assertMean(1, -1, 3);
    assertMean((1L << 62) - 1, -1, Long.MAX_VALUE);

      } catch (IllegalArgumentException expected) {
      }
    }
  }

  @AndroidIncompatible // slow
  @GwtIncompatible // java.math.BigInteger
  public void testMean() {
    // Odd-sized ranges have an obvious mean
    assertMean(2, 1, 3);

    assertMean(-2, -3, -1);
    assertMean(0, -1, 1);
    assertMean(1, -1, 3);
    assertMean((1 << 30) - 1, -1, Integer.MAX_VALUE);

    }
    // Should overflow without throwing.
    accumulator.addAll(accumulator.snapshot());
    assertThat(accumulator.count()).isLessThan(0L);
  }

  public void testMean() {
    assertThrows(IllegalStateException.class, () -> emptyAccumulator.mean());
    assertThrows(IllegalStateException.class, () -> emptyAccumulatorByAddAllEmptyIterable.mean());