private static final Monoid<Option<Integer>> SumMonoidWrapper = Semigroup.intAdditionSemigroup.lift();

@Test
public void sum_of_two_numbers() {
    Option<Integer> sum = SumMonoidWrapper.sum(some(3), some(5));
    assertThat(sum, is(some(8)));
}

private static final Monoid<Option<Integer>> ProductMonoidWrapper = Semigroup.intMultiplicationSemigroup.lift();

@Test
public void product_of_two_numbers() {
    Option<Integer> product = ProductMonoidWrapper.sum(some(3), some(5));
    assertThat(product, is(some(10)));
}

@Test
public void addition_of_two_numbers() {
    Integer sum = intAdditionSemigroup.sum(2, 5);
    assertThat(sum, is(7));
}

@Test
public void multiplication_of_two_numbers() {
    Integer product = intMultiplicationSemigroup.sum(2, 5);
    assertThat(product, is(10));
}