1  // Copyright (c) 2021-2022 The Bitcoin Core developers
 2  // Distributed under the MIT software license, see the accompanying
 3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 4  
 5  #include <minisketch.h>
 6  #include <node/minisketchwrapper.h>
 7  #include <random.h>
 8  #include <test/util/random.h>
 9  #include <test/util/setup_common.h>
10  
11  #include <boost/test/unit_test.hpp>
12  
13  #include <utility>
14  
15  using node::MakeMinisketch32;
16  
17  BOOST_AUTO_TEST_SUITE(minisketch_tests)
18  
19  BOOST_AUTO_TEST_CASE(minisketch_test)
20  {
21      for (int i = 0; i < 100; ++i) {
22          uint32_t errors = 0 + InsecureRandRange(11);
23          uint32_t start_a = 1 + InsecureRandRange(1000000000);
24          uint32_t a_not_b = InsecureRandRange(errors + 1);
25          uint32_t b_not_a = errors - a_not_b;
26          uint32_t both = InsecureRandRange(10000);
27          uint32_t end_a = start_a + a_not_b + both;
28          uint32_t start_b = start_a + a_not_b;
29          uint32_t end_b = start_b + both + b_not_a;
30  
31          Minisketch sketch_a = MakeMinisketch32(10);
32          for (uint32_t a = start_a; a < end_a; ++a) sketch_a.Add(a);
33          Minisketch sketch_b = MakeMinisketch32(10);
34          for (uint32_t b = start_b; b < end_b; ++b) sketch_b.Add(b);
35  
36          Minisketch sketch_ar = MakeMinisketch32(10);
37          Minisketch sketch_br = MakeMinisketch32(10);
38          sketch_ar.Deserialize(sketch_a.Serialize());
39          sketch_br.Deserialize(sketch_b.Serialize());
40  
41          Minisketch sketch_c = std::move(sketch_ar);
42          sketch_c.Merge(sketch_br);
43          auto dec = sketch_c.Decode(errors);
44          BOOST_REQUIRE(dec.has_value());
45          auto sols = std::move(*dec);
46          std::sort(sols.begin(), sols.end());
47          for (uint32_t i = 0; i < a_not_b; ++i) BOOST_CHECK_EQUAL(sols[i], start_a + i);
48          for (uint32_t i = 0; i < b_not_a; ++i) BOOST_CHECK_EQUAL(sols[i + a_not_b], start_b + both + i);
49      }
50  }
51  
52  BOOST_AUTO_TEST_SUITE_END()