// Test StrLast function
    bool test_str_last(void) {
    WriteFmt("Testing StrLast\n");
    
    Str s = StrInitFromZstr("Hello");

    
    // Get the last character
    char last = StrLast(&s);
    
    // Check that the character is correct

    case STR_LAST : {
    if (VecLen(str) > 0) {
    char last = StrLast(str);
    (void)last; // Suppress unused variable warning
    }