src/test/random_tests.cpp


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38

// Copyright (c) 2017 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include "random.h"

#include "test/test_bitcoin.h"

#include <boost/test/unit_test.hpp>

BOOST_FIXTURE_TEST_SUITE(random_tests, BasicTestingSetup)

BOOST_AUTO_TEST_CASE(osrandom_tests)
{
    BOOST_CHECK(Random_SanityCheck());
}

BOOST_AUTO_TEST_CASE(fastrandom_tests)
{
    // Check that deterministic FastRandomContexts are deterministic
    FastRandomContext ctx1(true);
    FastRandomContext ctx2(true);

    BOOST_CHECK_EQUAL(ctx1.rand32(), ctx2.rand32());
    BOOST_CHECK_EQUAL(ctx1.rand32(), ctx2.rand32());
    BOOST_CHECK_EQUAL(ctx1.rand64(), ctx2.rand64());
    BOOST_CHECK_EQUAL(ctx1.randbits(3), ctx2.randbits(3));
    BOOST_CHECK_EQUAL(ctx1.randbits(7), ctx2.randbits(7));
    BOOST_CHECK_EQUAL(ctx1.rand32(), ctx2.rand32());
    BOOST_CHECK_EQUAL(ctx1.randbits(3), ctx2.randbits(3));

    // Check that a nondeterministic ones are not
    FastRandomContext ctx3;
    FastRandomContext ctx4;
    BOOST_CHECK(ctx3.rand64() != ctx4.rand64()); // extremely unlikely to be equal
}

BOOST_AUTO_TEST_SUITE_END()