79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
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// Copyright (c) 2012-2014, The CryptoNote developers, The Bytecoin developers
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//
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// This file is part of Bytecoin.
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//
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// Bytecoin is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Bytecoin is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with Bytecoin. If not, see <http://www.gnu.org/licenses/>.
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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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