reftable/block_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 "block.h"
  10
  11 #include "system.h"
  12 #include "blocksource.h"
  13 #include "basics.h"
  14 #include "constants.h"
  15 #include "record.h"
  16 #include "test_framework.h"
  17 #include "reftable-tests.h"
  18
  19 static void test_block_read_write(void)
  20 {
  21         const int header_off = 21; /* random */
  22         char *names[30];
  23         const int N = ARRAY_SIZE(names);
  24         const int block_size = 1024;
  25         struct reftable_block block = { NULL };
  26         struct block_writer bw = {
  27                 .last_key = STRBUF_INIT,
  28         };
  29         struct reftable_ref_record ref = { NULL };
  30         struct reftable_record rec = { NULL };
  31         int i = 0;
  32         int n;
  33         struct block_reader br = { 0 };
  34         struct block_iter it = { .last_key = STRBUF_INIT };
  35         int j = 0;
  36         struct strbuf want = STRBUF_INIT;
  37
  38         block.data = reftable_calloc(block_size);
  39         block.len = block_size;
  40         block.source = malloc_block_source();
  41         block_writer_init(&bw, BLOCK_TYPE_REF, block.data, block_size,
  42                           header_off, hash_size(GIT_SHA1_FORMAT_ID));
  43         reftable_record_from_ref(&rec, &ref);
  44
  45         for (i = 0; i < N; i++) {
  46                 char name[100];
  47                 uint8_t hash[GIT_SHA1_RAWSZ];
  48                 snprintf(name, sizeof(name), "branch%02d", i);
  49                 memset(hash, i, sizeof(hash));
  50
  51                 ref.refname = name;
  52                 ref.value_type = REFTABLE_REF_VAL1;
  53                 ref.value.val1 = hash;
  54
  55                 names[i] = xstrdup(name);
  56                 n = block_writer_add(&bw, &rec);
  57                 ref.refname = NULL;
  58                 ref.value_type = REFTABLE_REF_DELETION;
  59                 EXPECT(n == 0);
  60         }
  61
  62         n = block_writer_finish(&bw);
  63         EXPECT(n > 0);
  64
  65         block_writer_release(&bw);
  66
  67         block_reader_init(&br, &block, header_off, block_size, GIT_SHA1_RAWSZ);
  68
  69         block_reader_start(&br, &it);
  70
  71         while (1) {
  72                 int r = block_iter_next(&it, &rec);
  73                 EXPECT(r >= 0);
  74                 if (r > 0) {
  75                         break;
  76                 }
  77                 EXPECT_STREQ(names[j], ref.refname);
  78                 j++;
  79         }
  80
  81         reftable_record_release(&rec);
  82         block_iter_close(&it);
  83
  84         for (i = 0; i < N; i++) {
  85                 struct block_iter it = { .last_key = STRBUF_INIT };
  86                 strbuf_reset(&want);
  87                 strbuf_addstr(&want, names[i]);
  88
  89                 n = block_reader_seek(&br, &it, &want);
  90                 EXPECT(n == 0);
  91
  92                 n = block_iter_next(&it, &rec);
  93                 EXPECT(n == 0);
  94
  95                 EXPECT_STREQ(names[i], ref.refname);
  96
  97                 want.len--;
  98                 n = block_reader_seek(&br, &it, &want);
  99                 EXPECT(n == 0);
 100
 101                 n = block_iter_next(&it, &rec);
 102                 EXPECT(n == 0);
 103                 EXPECT_STREQ(names[10 * (i / 10)], ref.refname);
 104
 105                 block_iter_close(&it);
 106         }
 107
 108         reftable_record_release(&rec);
 109         reftable_block_done(&br.block);
 110         strbuf_release(&want);
 111         for (i = 0; i < N; i++) {
 112                 reftable_free(names[i]);
 113         }
 114 }
 115
 116 int block_test_main(int argc, const char *argv[])
 117 {
 118         RUN_TEST(test_block_read_write);
 119         return 0;
 120 }