@Test
    void ageDisplay() //тесты к заданию 10
    {
        Human human1 = new Human("John", "Doe", "Ivanovich", 25);
        Human human2 = new Human("Jane", "Doe", "Petrovich", 30);
        Human human3 = new Human("Mary", "Johnson", "Sidorovich", 25);
        Human human4 = new Human("Bob", "Fedor", "Ivanovich", 25);
        Human human5 = new Human("Pisarev", "Ivan", "Stepanovich", 30);
        Human human6 = new Human("Ivanov", "Maksim", "Maksimovich", 7);

        Set<Human> humanSet = new HashSet<>(Arrays.asList(human1,human2,human3,human4,human5,human6));

        Map<Integer, List<Human>> ageMap = new HashMap<>();
        ageMap.put(7, new ArrayList<>(Arrays.asList(human6)));
        ageMap.put(25, new ArrayList<>(Arrays.asList(human1,human3,human4)));
        ageMap.put(30, new ArrayList<>(Arrays.asList(human2,human5)));

        assertEquals(ageMap, CollectionsDemo.ageDisplay(humanSet));


       ageMap.clear();
        human1 = new Human("John", "Doe", "Ivanovich", 44);
        human2 = new Human("Jane", "Doe", "Petrovich", 15);
        human3 = new Human("Mary", "Johnson", "Sidorovich", 16);
        human4 = new Human("Bob", "Fedor", "Ivanovich", 44);
        human5 = new Human("Pisarev", "Ivan", "Stepanovich", 20);
        human6 = new Human("Ivanov", "Maksim", "Maksimovich", 16);

        humanSet = new HashSet<>(Arrays.asList(human1,human2,human3,human4,human5,human6));

        ageMap.put(15, new ArrayList<>(Arrays.asList(human2)));
        ageMap.put(16, new ArrayList<>(Arrays.asList(human3,human6)));
        ageMap.put(20, new ArrayList<>(Arrays.asList(human5)));
        ageMap.put(44, new ArrayList<>(Arrays.asList(human1,human4)));

        assertEquals(ageMap, CollectionsDemo.ageDisplay(humanSet));
    }

    @Test
    void superDisplay() //тесты к заданию 11
    {
        Human human1 = new Human("John", "Doe", "Ivanovich", 25);
        Human human2 = new Human("Jane", "Doe", "Petrovich", 30);
        Human human3 = new Human("Jary", "Johnson", "Sidorovich", 25);
        Human human4 = new Human("Bob", "Fedor", "Ivanovich", 25);
        Human human5 = new Human("Pisarev", "Ivan", "Stepanovich", 30);
        Human human6 = new Human("Ivanov", "Maksim", "Maksimovich", 7);

        Set<Human> humanSet = new HashSet<>(Arrays.asList(human1,human2,human3,human4,human5,human6));

        Map<Integer, Map<Character, List<Human>>> expected = new TreeMap<>();

        Map<Character, List<Human>> listMap = new TreeMap<>();
        listMap.put('I', new ArrayList<>(Arrays.asList(human6)));

        expected.put(7, new TreeMap<>(listMap));
        listMap.clear();

        listMap.put('B',new ArrayList<>(Arrays.asList(human4)));
        listMap.put('J',new ArrayList<>(Arrays.asList(human3,human1)));

        expected.put(25, new TreeMap<>(listMap));
        listMap.clear();

        listMap.put('J',new ArrayList<>(Arrays.asList(human2)));
        listMap.put('P',new ArrayList<>(Arrays.asList(human5)));

        expected.put(30, new TreeMap<>(listMap));
        listMap.clear();

        assertEquals(expected, CollectionsDemo.superDisplay(humanSet));

        human1 = new Human("Johny", "Doe", "Ivanovich", 25);
        human2 = new Human("Jane", "Doe", "Petrovich", 7);
        human3 = new Human("Jary", "Johnson", "Sidorovich", 25);
        human4 = new Human("Bob", "Fedor", "Ivanovich", 7);
        human5 = new Human("Pisarev", "Ivan", "Stepanovich", 30);
        human6 = new Human("Ivanov", "Maksim", "Maksimovich", 7);
        Human human7 = new Human("Spirov", "Maksim", "Maksimovich", 42);
        Human human8 = new Human("Livanov", "Maksim", "Maksimovich", 25);
        Human human9 = new Human("Percov", "Maksim", "Maksimovich", 30);

        humanSet = new HashSet<>(Arrays.asList(human1,human2,human3,human4,human5,human6,human7,human8,human9));

        expected.clear();

        listMap.put('B', new ArrayList<>(Arrays.asList(human4)));
        listMap.put('I', new ArrayList<>(Arrays.asList(human6)));
        listMap.put('J', new ArrayList<>(Arrays.asList(human2)));

        expected.put(7, new TreeMap<>(listMap));
        listMap.clear();

        listMap.put('J', new ArrayList<>(Arrays.asList(human3,human1)));
        listMap.put('L', new ArrayList<>(Arrays.asList(human8)));

        expected.put(25, new TreeMap<>(listMap));
        listMap.clear();

        listMap.put('P', new ArrayList<>(Arrays.asList(human9,human5)));

        expected.put(30, new TreeMap<>(listMap));
        listMap.clear();

        listMap.put('S', new ArrayList<>(Arrays.asList(human7)));

        expected.put(42, new TreeMap<>(listMap));
        listMap.clear();

        assertEquals(expected, CollectionsDemo.superDisplay(humanSet));
    }