t/helper/test-example-decorate.c

   1 #include "test-tool.h"
   2 #include "cache.h"
   3 #include "object.h"
   4 #include "decorate.h"
   5
   6 int cmd__example_decorate(int argc, const char **argv)
   7 {
   8         struct decoration n;
   9         struct object_id one_oid = { {1} };
  10         struct object_id two_oid = { {2} };
  11         struct object_id three_oid = { {3} };
  12         struct object *one, *two, *three;
  13
  14         int decoration_a, decoration_b;
  15
  16         void *ret;
  17
  18         int i, objects_noticed = 0;
  19
  20         /*
  21          * The struct must be zero-initialized.
  22          */
  23         memset(&n, 0, sizeof(n));
  24
  25         /*
  26          * Add 2 objects, one with a non-NULL decoration and one with a NULL
  27          * decoration.
  28          */
  29         one = lookup_unknown_object(one_oid.hash);
  30         two = lookup_unknown_object(two_oid.hash);
  31         ret = add_decoration(&n, one, &decoration_a);
  32         if (ret)
  33                 BUG("when adding a brand-new object, NULL should be returned");
  34         ret = add_decoration(&n, two, NULL);
  35         if (ret)
  36                 BUG("when adding a brand-new object, NULL should be returned");
  37
  38         /*
  39          * When re-adding an already existing object, the old decoration is
  40          * returned.
  41          */
  42         ret = add_decoration(&n, one, NULL);
  43         if (ret != &decoration_a)
  44                 BUG("when readding an already existing object, existing decoration should be returned");
  45         ret = add_decoration(&n, two, &decoration_b);
  46         if (ret)
  47                 BUG("when readding an already existing object, existing decoration should be returned");
  48
  49         /*
  50          * Lookup returns the added declarations, or NULL if the object was
  51          * never added.
  52          */
  53         ret = lookup_decoration(&n, one);
  54         if (ret)
  55                 BUG("lookup should return added declaration");
  56         ret = lookup_decoration(&n, two);
  57         if (ret != &decoration_b)
  58                 BUG("lookup should return added declaration");
  59         three = lookup_unknown_object(three_oid.hash);
  60         ret = lookup_decoration(&n, three);
  61         if (ret)
  62                 BUG("lookup for unknown object should return NULL");
  63
  64         /*
  65          * The user can also loop through all entries.
  66          */
  67         for (i = 0; i < n.size; i++) {
  68                 if (n.entries[i].base)
  69                         objects_noticed++;
  70         }
  71         if (objects_noticed != 2)
  72                 BUG("should have 2 objects");
  73
  74         return 0;
  75 }