int main()
{

    printf("### TEST1 ###\n");
    char *str1 = "abcd";
    char *str2 = "abcd";
    char **p1;
    char **p2;
    p1 = &str1;
    p2 = &str2;

    // cast to void*
    const void *b1 = (const void *) p1;
    const void *b2 = (const void *) p2;

    printf("1.1 Result should be 0. result is: %d\n", stringCompare(b1, b2));

    str1 = "a";
    printf("1.1 Result should be < 0. result is: %d\n", stringCompare(b1, b2));

    printf("### TEST2 ### VectorCompare1by1\n");

    double a_vector[3] = {2.0, 4.0, 5.0};
    Vector a = {3, a_vector};
    double b_vector[3] = {2.0, 4.0, 2.0};
    Vector b = {3, b_vector};

    Vector *ap;
    ap = &a;
    Vector *bp;
    bp = &b;


    const void *a_casted = (const void *) ap;
    const void *b_casted = (const void *) bp;

    printf("2.1 Comparison result is: %d, should be > 0\n", vectorCompare1By1(a_casted, b_casted));
    b_vector[2] = 5.0;
    printf("2.2 Comparison result is: %d, should be 0\n", vectorCompare1By1(a_casted, b_casted));


    printf("### TEST3 ### VectorCopyNorm\n");
    b_vector[0] = 90.0;
    b_vector[1] = 90.0;
    b_vector[2] = 90.0;

    printf("3.1 success is: %d, should be 1\n", copyIfNormIsLarger(b_casted, (void *) a_casted));


    double c_vector[5] = {1.0, 2.0, 3.0, 4.0, 5.0};
    Vector c = {5, c_vector};;
    Vector *cp;
    cp = &c;

    const void *c_casted = (const void *) cp;

    printf("3.2 success is: %d, should be 1\n", copyIfNormIsLarger(c_casted, (void *) a_casted));
    printf("3.3 success is: %d, should be 0\n", copyIfNormIsLarger(a_casted, (void *) c_casted));

    printf("### TEST4 ### findmaxnormverctor in tree\n");

    RBTree *myTree = newRBTree(vectorCompare1By1, freeVector);
    addToRBTree(myTree, (void *) a_casted);
    addToRBTree(myTree, (void *) b_casted);
    addToRBTree(myTree, (void *) c_casted);

    Vector *newVec;
    newVec = findMaxNormVectorInTree(myTree);
    printf("the first element of the best norm vector is: %f, should print 90\n",
           newVec->vector[0]);
    // free(newVec);

}