@Test
public void getLowBoundary() {

    final Range.RangeBoundary lowBoundary = Range.RangeBoundary.CLOSED;
    final RangeImpl rangeImpl = new RangeImpl(lowBoundary, 10, 15, Range.RangeBoundary.OPEN);
    Assert.assertEquals(lowBoundary, rangeImpl.getLowBoundary());
}