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60 lines
2.0 KiB
60 lines
2.0 KiB
// Copyright (c) 2017 The Bitcoin Core developers |
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// Distributed under the MIT software license, see the accompanying |
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// file COPYING or http://www.opensource.org/licenses/mit-license.php. |
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#include "random.h" |
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#include "test/test_bitcoin.h" |
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#include <boost/test/unit_test.hpp> |
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BOOST_FIXTURE_TEST_SUITE(random_tests, BasicTestingSetup) |
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BOOST_AUTO_TEST_CASE(osrandom_tests) |
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{ |
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BOOST_CHECK(Random_SanityCheck()); |
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} |
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BOOST_AUTO_TEST_CASE(fastrandom_tests) |
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{ |
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// Check that deterministic FastRandomContexts are deterministic |
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FastRandomContext ctx1(true); |
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FastRandomContext ctx2(true); |
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BOOST_CHECK_EQUAL(ctx1.rand32(), ctx2.rand32()); |
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BOOST_CHECK_EQUAL(ctx1.rand32(), ctx2.rand32()); |
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BOOST_CHECK_EQUAL(ctx1.rand64(), ctx2.rand64()); |
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BOOST_CHECK_EQUAL(ctx1.randbits(3), ctx2.randbits(3)); |
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BOOST_CHECK(ctx1.randbytes(17) == ctx2.randbytes(17)); |
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BOOST_CHECK(ctx1.rand256() == ctx2.rand256()); |
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BOOST_CHECK_EQUAL(ctx1.randbits(7), ctx2.randbits(7)); |
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BOOST_CHECK(ctx1.randbytes(128) == ctx2.randbytes(128)); |
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BOOST_CHECK_EQUAL(ctx1.rand32(), ctx2.rand32()); |
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BOOST_CHECK_EQUAL(ctx1.randbits(3), ctx2.randbits(3)); |
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BOOST_CHECK(ctx1.rand256() == ctx2.rand256()); |
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BOOST_CHECK(ctx1.randbytes(50) == ctx2.randbytes(50)); |
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// Check that a nondeterministic ones are not |
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FastRandomContext ctx3; |
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FastRandomContext ctx4; |
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BOOST_CHECK(ctx3.rand64() != ctx4.rand64()); // extremely unlikely to be equal |
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BOOST_CHECK(ctx3.rand256() != ctx4.rand256()); |
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BOOST_CHECK(ctx3.randbytes(7) != ctx4.randbytes(7)); |
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} |
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BOOST_AUTO_TEST_CASE(fastrandom_randbits) |
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{ |
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FastRandomContext ctx1; |
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FastRandomContext ctx2; |
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for (int bits = 0; bits < 63; ++bits) { |
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for (int j = 0; j < 1000; ++j) { |
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uint64_t rangebits = ctx1.randbits(bits); |
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BOOST_CHECK_EQUAL(rangebits >> bits, 0); |
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uint64_t range = ((uint64_t)1) << bits | rangebits; |
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uint64_t rand = ctx2.randrange(range); |
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BOOST_CHECK(rand < range); |
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} |
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} |
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} |
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BOOST_AUTO_TEST_SUITE_END()
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