Inside Bitcoin

1// Copyright (c) 2021-present 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/common.h>
9#include <test/util/random.h>
10#include <test/util/setup_common.h>
11
12#include <boost/test/unit_test.hpp>
13
14#include <utility>
15
16using node::MakeMinisketch32;
17
18BOOST_FIXTURE_TEST_SUITE(minisketch_tests, BasicTestingSetup)
19
20BOOST_AUTO_TEST_CASE(minisketch_test)
21{
22    for (int i = 0; i < 100; ++i) {
23        uint32_t errors = 0 + m_rng.randrange(11);
24        uint32_t start_a = 1 + m_rng.randrange(1000000000);
25        uint32_t a_not_b = m_rng.randrange(errors + 1);
26        uint32_t b_not_a = errors - a_not_b;
27        uint32_t both = m_rng.randrange(10000);
28        uint32_t end_a = start_a + a_not_b + both;
29        uint32_t start_b = start_a + a_not_b;
30        uint32_t end_b = start_b + both + b_not_a;
31
32        Minisketch sketch_a = MakeMinisketch32(10);
33        for (uint32_t a = start_a; a < end_a; ++a) sketch_a.Add(a);
34        Minisketch sketch_b = MakeMinisketch32(10);
35        for (uint32_t b = start_b; b < end_b; ++b) sketch_b.Add(b);
36
37        Minisketch sketch_ar = MakeMinisketch32(10);
38        Minisketch sketch_br = MakeMinisketch32(10);
39        sketch_ar.Deserialize(sketch_a.Serialize());
40        sketch_br.Deserialize(sketch_b.Serialize());
41
42        Minisketch sketch_c = std::move(sketch_ar);
43        sketch_c.Merge(sketch_br);
44        auto dec = sketch_c.Decode(errors);
45        BOOST_REQUIRE(dec.has_value());
46        auto sols = std::move(*dec);
47        std::sort(sols.begin(), sols.end());
48        for (uint32_t i = 0; i < a_not_b; ++i) BOOST_CHECK_EQUAL(sols[i], start_a + i);
49        for (uint32_t i = 0; i < b_not_a; ++i) BOOST_CHECK_EQUAL(sols[i + a_not_b], start_b + both + i);
50    }
51}
52
53BOOST_AUTO_TEST_SUITE_END()
54