### Question:
LongRangeOperations extends RangeOperations<Long> { @Override public Long add(Long value, int step) { return value + step; }  @Override Long getValue(String valueString); @Override Long getMinValue(); @Override Long getMaxValue(); @Override Long add(Long value, int step); @Override Long subtract(Long value, int step);  }### Answer:
@Test public void testAdd() { Long actual = longRangeOperations.add(50l, 1); Long expected = 51l; assertEquals(expected, actual); }