Test.java

    static boolean test9() {
        int[] a = {4,5,6,7,8,9};
        int i = 0;
        AvlTree b = new AvlTree(a);
        boolean flag = true;
        for (int x : b) {
            if (x != a[i])
                flag = false;
            i++;
        }

        return flag;
    }