### Question:
RoundHelper { public static double getRoundedEvenExp (final double dValue, @Nonnegative final int nScale) { return getRounded (dValue, nScale, RoundingMode.HALF_EVEN, EDecimalType.EXP); } private  RoundHelper(); static double getRounded(final double dValue,
                                   @Nonnegative final int nScale,
                                   @Nonnull final RoundingMode eMode,
                                   @Nonnull final EDecimalType eType); static double getRoundedUpFix(final double dValue, @Nonnegative final int nScale); static double getRoundedUpFix2(final double dValue); static double getRoundedEvenExp(final double dValue, @Nonnegative final int nScale); static double getRoundedEvenExp2(final double dValue); @Nonnull static String getFormatted(final double dValue,
                                     @Nonnegative final int nScale,
                                     @Nonnull final EDecimalType eType,
                                     @Nonnull final Locale aLocale); @Nonnull static String getFormattedFix(final double dValue, @Nonnegative final int nScale, final Locale aLocale); @Nonnull static String getFormattedFix2(final double dValue, final Locale aLocale); @Nonnull static String getFormattedExp(final double dValue, @Nonnegative final int nScale, final Locale aLocale); @Nonnull static String getFormattedExp2(final double dValue, final Locale aLocale);  }### Answer:
@Test public void testGetRoundedEvenExp () { CommonsAssert.assertEquals (9E-1, RoundHelper.getRoundedEvenExp (0.9, 0)); CommonsAssert.assertEquals (1E0, RoundHelper.getRoundedEvenExp (1.0, 0)); CommonsAssert.assertEquals (1E0, RoundHelper.getRoundedEvenExp (1.1, 0)); CommonsAssert.assertEquals (1E0, RoundHelper.getRoundedEvenExp (1.4, 0)); CommonsAssert.assertEquals (1E0, RoundHelper.getRoundedEvenExp (1.4999, 0)); CommonsAssert.assertEquals (1.50E0, RoundHelper.getRoundedEvenExp (1.4999, 2)); CommonsAssert.assertEquals (1.50E0, RoundHelper.getRoundedEvenExp2 (1.4999)); CommonsAssert.assertEquals (2E0, RoundHelper.getRoundedEvenExp (1.5, 0)); }