### Question:
VerificationUtil { static public boolean isZero(Number value, double zeroThreshold){ return (value.doubleValue() >= -zeroThreshold) && (value.doubleValue() <= zeroThreshold); } private  VerificationUtil(); static boolean acceptable(Object expected, Object actual, double precision, double zeroThreshold); static boolean acceptable(Number expected, Number actual, double precision, double zeroThreshold); static boolean isZero(Number value, double zeroThreshold);  }### Answer:
@Test public void isZero(){ double zeroThreshold = 0.001; assertTrue(VerificationUtil.isZero(0.0005, zeroThreshold)); assertTrue(VerificationUtil.isZero(0, zeroThreshold)); assertTrue(VerificationUtil.isZero(-0.0005, zeroThreshold)); assertFalse(VerificationUtil.isZero(0.0015, zeroThreshold)); assertFalse(VerificationUtil.isZero(-0.0015, zeroThreshold)); }