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_record rec = {
  30                 .type = BLOCK_TYPE_REF,
  31         };
  32         int i = 0;
  33         int n;
  34         struct block_reader br = { 0 };
  35         struct block_iter it = { .last_key = STRBUF_INIT };
  36         int j = 0;
  37         struct strbuf want = STRBUF_INIT;
  38
  39         block.data = reftable_calloc(block_size);
  40         block.len = block_size;
  41         block.source = malloc_block_source();
  42         block_writer_init(&bw, BLOCK_TYPE_REF, block.data, block_size,
  43                           header_off, hash_size(GIT_SHA1_FORMAT_ID));
  44
  45         rec.u.ref.refname = "";
  46         rec.u.ref.value_type = REFTABLE_REF_DELETION;
  47         n = block_writer_add(&bw, &rec);
  48         EXPECT(n == REFTABLE_API_ERROR);
  49
  50         for (i = 0; i < N; i++) {
  51                 char name[100];
  52                 uint8_t hash[GIT_SHA1_RAWSZ];
  53                 snprintf(name, sizeof(name), "branch%02d", i);
  54                 memset(hash, i, sizeof(hash));
  55
  56                 rec.u.ref.refname = name;
  57                 rec.u.ref.value_type = REFTABLE_REF_VAL1;
  58                 rec.u.ref.value.val1 = hash;
  59
  60                 names[i] = xstrdup(name);
  61                 n = block_writer_add(&bw, &rec);
  62                 rec.u.ref.refname = NULL;
  63                 rec.u.ref.value_type = REFTABLE_REF_DELETION;
  64                 EXPECT(n == 0);
  65         }
  66
  67         n = block_writer_finish(&bw);
  68         EXPECT(n > 0);
  69
  70         block_writer_release(&bw);
  71
  72         block_reader_init(&br, &block, header_off, block_size, GIT_SHA1_RAWSZ);
  73
  74         block_reader_start(&br, &it);
  75
  76         while (1) {
  77                 int r = block_iter_next(&it, &rec);
  78                 EXPECT(r >= 0);
  79                 if (r > 0) {
  80                         break;
  81                 }
  82                 EXPECT_STREQ(names[j], rec.u.ref.refname);
  83                 j++;
  84         }
  85
  86         reftable_record_release(&rec);
  87         block_iter_close(&it);
  88
  89         for (i = 0; i < N; i++) {
  90                 struct block_iter it = { .last_key = STRBUF_INIT };
  91                 strbuf_reset(&want);
  92                 strbuf_addstr(&want, names[i]);
  93
  94                 n = block_reader_seek(&br, &it, &want);
  95                 EXPECT(n == 0);
  96
  97                 n = block_iter_next(&it, &rec);
  98                 EXPECT(n == 0);
  99
 100                 EXPECT_STREQ(names[i], rec.u.ref.refname);
 101
 102                 want.len--;
 103                 n = block_reader_seek(&br, &it, &want);
 104                 EXPECT(n == 0);
 105
 106                 n = block_iter_next(&it, &rec);
 107                 EXPECT(n == 0);
 108                 EXPECT_STREQ(names[10 * (i / 10)], rec.u.ref.refname);
 109
 110                 block_iter_close(&it);
 111         }
 112
 113         reftable_record_release(&rec);
 114         reftable_block_done(&br.block);
 115         strbuf_release(&want);
 116         for (i = 0; i < N; i++) {
 117                 reftable_free(names[i]);
 118         }
 119 }
 120
 121 int block_test_main(int argc, const char *argv[])
 122 {
 123         RUN_TEST(test_block_read_write);
 124         return 0;
 125 }