git.ozlabs.org Git - ccan/blob - ccan/list/test/run-list_prev-list_next.c

   1 #include <ccan/list/list.h>
   2 #include <ccan/tap/tap.h>
   3 #include <ccan/list/list.c>
   4 #include "helper.h"
   5
   6 struct parent {
   7         const char *name;
   8         unsigned int num_children;
   9         struct list_head children;
  10 };
  11
  12 struct child {
  13         const char *name;
  14         struct list_node list;
  15 };
  16
  17 int main(int argc, char *argv[])
  18 {
  19         struct parent parent;
  20         struct child c1, c2, c3;
  21
  22         plan_tests(12);
  23         parent.num_children = 0;
  24         list_head_init(&parent.children);
  25
  26         c1.name = "c1";
  27         list_add(&parent.children, &c1.list);
  28
  29         ok1(list_next(&parent.children, &c1, list) == NULL);
  30         ok1(list_prev(&parent.children, &c1, list) == NULL);
  31
  32         c2.name = "c2";
  33         list_add_tail(&parent.children, &c2.list);
  34
  35         ok1(list_next(&parent.children, &c1, list) == &c2);
  36         ok1(list_prev(&parent.children, &c1, list) == NULL);
  37         ok1(list_next(&parent.children, &c2, list) == NULL);
  38         ok1(list_prev(&parent.children, &c2, list) == &c1);
  39
  40         c3.name = "c3";
  41         list_add_tail(&parent.children, &c3.list);
  42
  43         ok1(list_next(&parent.children, &c1, list) == &c2);
  44         ok1(list_prev(&parent.children, &c1, list) == NULL);
  45         ok1(list_next(&parent.children, &c2, list) == &c3);
  46         ok1(list_prev(&parent.children, &c2, list) == &c1);
  47         ok1(list_next(&parent.children, &c3, list) == NULL);
  48         ok1(list_prev(&parent.children, &c3, list) == &c2);
  49         return exit_status();
  50 }