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

    
    // Get the first character
    char first = StrFirst(&s);
    
    // Check that the character is correct

    case STR_FIRST : {
    if (VecLen(str) > 0) {
    char first = StrFirst(str);
    (void)first; // Suppress unused variable warning
    }