reftable/pq_test.c

   1 /*
   2 Copyright 2020 Google LLC
   3
   4 Use of this source code is governed by a BSD-style
   5 license that can be found in the LICENSE file or at
   6 https://developers.google.com/open-source/licenses/bsd
   7 */
   8
   9 #include "system.h"
  10
  11 #include "basics.h"
  12 #include "constants.h"
  13 #include "pq.h"
  14 #include "record.h"
  15 #include "reftable-tests.h"
  16 #include "test_framework.h"
  17
  18 void merged_iter_pqueue_check(struct merged_iter_pqueue pq)
  19 {
  20         int i;
  21         for (i = 1; i < pq.len; i++) {
  22                 int parent = (i - 1) / 2;
  23
  24                 EXPECT(pq_less(&pq.heap[parent], &pq.heap[i]));
  25         }
  26 }
  27
  28 static void test_pq(void)
  29 {
  30         struct merged_iter_pqueue pq = { NULL };
  31         struct reftable_record recs[54];
  32         int N = ARRAY_SIZE(recs) - 1, i;
  33         char *last = NULL;
  34
  35         for (i = 0; i < N; i++) {
  36                 struct strbuf refname = STRBUF_INIT;
  37                 strbuf_addf(&refname, "%02d", i);
  38
  39                 reftable_record_init(&recs[i], BLOCK_TYPE_REF);
  40                 recs[i].u.ref.refname = strbuf_detach(&refname, NULL);
  41         }
  42
  43         i = 1;
  44         do {
  45                 struct pq_entry e = {
  46                         .rec = &recs[i],
  47                 };
  48
  49                 merged_iter_pqueue_add(&pq, &e);
  50                 merged_iter_pqueue_check(pq);
  51
  52                 i = (i * 7) % N;
  53         } while (i != 1);
  54
  55         while (!merged_iter_pqueue_is_empty(pq)) {
  56                 struct pq_entry e = merged_iter_pqueue_remove(&pq);
  57                 merged_iter_pqueue_check(pq);
  58
  59                 EXPECT(reftable_record_type(e.rec) == BLOCK_TYPE_REF);
  60                 if (last)
  61                         EXPECT(strcmp(last, e.rec->u.ref.refname) < 0);
  62                 last = e.rec->u.ref.refname;
  63         }
  64
  65         for (i = 0; i < N; i++)
  66                 reftable_record_release(&recs[i]);
  67         merged_iter_pqueue_release(&pq);
  68 }
  69
  70 int pq_test_main(int argc, const char *argv[])
  71 {
  72         RUN_TEST(test_pq);
  73         return 0;
  74 }