@Test
    public void testTakeTwoFromListOfTwo() {
        List<Integer> integers = new ArrayList<Integer>();
        integers.add(1);
        integers.add(2);
        List<List<Integer>> combinations = Combination.takeKFromList(integers, 2);
        List<Integer> expectedResult1 = new ArrayList<Integer>();
        expectedResult1.add(1);
        expectedResult1.add(2);

        assertEquals(1, combinations.size());        
        assertTrue("Combination " + expectedResult1 + "isn't in the result", 
                combinations.contains(expectedResult1));
    }