64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
// Copyright (c) 2011-2015 The Cryptonote developers
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// Distributed under the MIT/X11 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 <string>
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#include "gtest/gtest.h"
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#include <unordered_set>
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#include "crypto/crypto.h"
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#include "Common/ShuffleGenerator.h"
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class ShuffleTest : public ::testing::Test {
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public:
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typedef ShuffleGenerator<size_t, std::default_random_engine> DefaultShuffleGenerator;
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typedef ShuffleGenerator<size_t, Crypto::random_engine<size_t>> CryptoShuffleGenerator;
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template <typename Gen>
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void checkUniqueness(Gen& gen, size_t count) {
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std::unordered_set<size_t> values;
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for (auto i = 0; i < count; ++i) {
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auto value = gen();
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bool inserted = values.insert(value).second;
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EXPECT_TRUE(inserted);
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}
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}
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template <typename Gen>
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void consume(Gen& gen, size_t count) {
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for (auto i = 0; i < count; ++i) {
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gen();
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}
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}
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template <typename ShuffleT>
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void checkEngine(size_t N, size_t consumeCount, bool check) {
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ShuffleT gen(N);
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check ? checkUniqueness(gen, consumeCount) : consume(gen, consumeCount);
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}
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};
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namespace {
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const size_t ITERATIONS = 10000;
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}
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TEST_F(ShuffleTest, correctness) {
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checkEngine<DefaultShuffleGenerator>(ITERATIONS, ITERATIONS, true);
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}
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TEST_F(ShuffleTest, correctness_fractionalSize) {
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checkEngine<DefaultShuffleGenerator>(ITERATIONS, ITERATIONS, true);
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checkEngine<DefaultShuffleGenerator>(ITERATIONS, ITERATIONS/2, true);
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checkEngine<DefaultShuffleGenerator>(ITERATIONS, ITERATIONS/3, true);
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}
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TEST_F(ShuffleTest, cryptoGenerator) {
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checkEngine<CryptoShuffleGenerator>(ITERATIONS * 3, ITERATIONS, false);
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}
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