assertNotNull(result);
        assertTrue(result.isPresent());
        assertEquals(Integer.valueOf(42), result.get());
    }

    public void test_ofNullable_withNullInteger() {
        Integer testValue = null;
        OptionalEntity<Integer> result = OptionalUtil.ofNullable(testValue);

        assertNotNull(result);
        assertFalse(result.isPresent());
    }