t/unit-tests/t-reftable-block.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 "test-lib.h"
  10 #include "reftable/block.h"
  11 #include "reftable/blocksource.h"
  12 #include "reftable/constants.h"
  13 #include "reftable/reftable-error.h"
  14
  15 static void t_block_read_write(void)
  16 {
  17         const int header_off = 21; /* random */
  18         struct reftable_record recs[30];
  19         const size_t N = ARRAY_SIZE(recs);
  20         const size_t block_size = 1024;
  21         struct reftable_block block = { 0 };
  22         struct block_writer bw = {
  23                 .last_key = STRBUF_INIT,
  24         };
  25         struct reftable_record rec = {
  26                 .type = BLOCK_TYPE_REF,
  27         };
  28         size_t i = 0;
  29         int ret;
  30         struct block_reader br = { 0 };
  31         struct block_iter it = BLOCK_ITER_INIT;
  32         size_t j = 0;
  33         struct strbuf want = STRBUF_INIT;
  34
  35         REFTABLE_CALLOC_ARRAY(block.data, block_size);
  36         block.len = block_size;
  37         block.source = malloc_block_source();
  38         block_writer_init(&bw, BLOCK_TYPE_REF, block.data, block_size,
  39                           header_off, hash_size(GIT_SHA1_FORMAT_ID));
  40
  41         rec.u.ref.refname = (char *) "";
  42         rec.u.ref.value_type = REFTABLE_REF_DELETION;
  43         ret = block_writer_add(&bw, &rec);
  44         check_int(ret, ==, REFTABLE_API_ERROR);
  45
  46         for (i = 0; i < N; i++) {
  47                 rec.u.ref.refname = xstrfmt("branch%02"PRIuMAX, (uintmax_t)i);
  48                 rec.u.ref.value_type = REFTABLE_REF_VAL1;
  49                 memset(rec.u.ref.value.val1, i, GIT_SHA1_RAWSZ);
  50
  51                 recs[i] = rec;
  52                 ret = block_writer_add(&bw, &rec);
  53                 rec.u.ref.refname = NULL;
  54                 rec.u.ref.value_type = REFTABLE_REF_DELETION;
  55                 check_int(ret, ==, 0);
  56         }
  57
  58         ret = block_writer_finish(&bw);
  59         check_int(ret, >, 0);
  60
  61         block_writer_release(&bw);
  62
  63         block_reader_init(&br, &block, header_off, block_size, GIT_SHA1_RAWSZ);
  64
  65         block_iter_seek_start(&it, &br);
  66
  67         while (1) {
  68                 ret = block_iter_next(&it, &rec);
  69                 check_int(ret, >=, 0);
  70                 if (ret > 0) {
  71                         check_int(i, ==, N);
  72                         break;
  73                 }
  74                 check(reftable_record_equal(&recs[j], &rec, GIT_SHA1_RAWSZ));
  75                 j++;
  76         }
  77
  78         for (i = 0; i < N; i++) {
  79                 block_iter_reset(&it);
  80                 reftable_record_key(&recs[i], &want);
  81
  82                 ret = block_iter_seek_key(&it, &br, &want);
  83                 check_int(ret, ==, 0);
  84
  85                 ret = block_iter_next(&it, &rec);
  86                 check_int(ret, ==, 0);
  87
  88                 check(reftable_record_equal(&recs[i], &rec, GIT_SHA1_RAWSZ));
  89
  90                 want.len--;
  91                 ret = block_iter_seek_key(&it, &br, &want);
  92                 check_int(ret, ==, 0);
  93
  94                 ret = block_iter_next(&it, &rec);
  95                 check_int(ret, ==, 0);
  96                 check(reftable_record_equal(&recs[10 * (i / 10)], &rec, GIT_SHA1_RAWSZ));
  97         }
  98
  99         block_reader_release(&br);
 100         block_iter_close(&it);
 101         reftable_record_release(&rec);
 102         reftable_block_done(&br.block);
 103         strbuf_release(&want);
 104         for (i = 0; i < N; i++)
 105                 reftable_record_release(&recs[i]);
 106 }
 107
 108 int cmd_main(int argc, const char *argv[])
 109 {
 110         TEST(t_block_read_write(), "read-write operations on blocks work");
 111
 112         return test_done();
 113 }