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/*
    This file is part of cpp-ethereum.

    cpp-ethereum is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    cpp-ethereum is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
*/
/** @file TestHelper.h
 * @author Marko Simovic <markobarko@gmail.com>
 * @date 2014
 */

#pragma once

#include <functional>

#include <boost/test/unit_test.hpp>

#include "JsonSpiritHeaders.h"
#include <libethereum/State.h>
#include <libevm/ExtVMFace.h>

namespace dev
{
namespace eth
{

class Client;

void mine(Client& c, int numBlocks);
void connectClients(Client& c1, Client& c2);

}

namespace test
{

/// Make sure that no Exception is thrown during testing. If one is thrown show its info and fail the test.
/// Our version of BOOST_REQUIRE_NO_THROW()
/// @param _statenent    The statement for which to make sure no exceptions are thrown
/// @param _message       A message to act as a prefix to the expression's error information
#define ETH_TEST_REQUIRE_NO_THROW(_statement, _message)             \
    do                                                                  \
    {                                                                   \
        try                                                         \
        {                                                               \
            BOOST_TEST_PASSPOINT();                                     \
            _statement;                                             \
        }                                                               \
        catch (boost::exception const& _e)                              \
        {                                                               \
            auto msg = std::string(_message " due to an exception thrown by " \
                BOOST_STRINGIZE(_statement) "\n") + boost::diagnostic_information(_e); \
            BOOST_CHECK_IMPL(false, msg, REQUIRE, CHECK_MSG);           \
        }                                                               \
        catch (...)                                                     \
        {                                                               \
            BOOST_CHECK_IMPL(false, "Unknown exception thrown by "      \
                BOOST_STRINGIZE(_statement), REQUIRE, CHECK_MSG);       \
        }                                                               \
    }                                                                   \
    while (0)

/// Check if an Exception is thrown during testing. If one is thrown show its info and continue the test
/// Our version of BOOST_CHECK_NO_THROW()
/// @param _statement    The statement for which to make sure no exceptions are thrown
/// @param _message       A message to act as a prefix to the expression's error information
#define ETH_TEST_CHECK_NO_THROW(_statement, _message)                   \
    do                                                                  \
    {                                                                   \
        try                                                         \
        {                                                               \
            BOOST_TEST_PASSPOINT();                                     \
            _statement;                                             \
        }                                                               \
        catch (boost::exception const& _e)                              \
        {                                                               \
            auto msg = std::string(_message " due to an exception thrown by " \
                BOOST_STRINGIZE(_statement) "\n") + boost::diagnostic_information(_e); \
            BOOST_CHECK_IMPL(false, msg, CHECK, CHECK_MSG);             \
        }                                                               \
        catch (...)                                                     \
        {                                                               \
            BOOST_CHECK_IMPL(false, "Unknown exception thrown by "      \
                BOOST_STRINGIZE(_statement), CHECK, CHECK_MSG );        \
        }                                                               \
    }                                                                   \
    while (0)


class ImportTest
{
public:
    ImportTest(json_spirit::mObject& _o) : m_statePre(Address(), OverlayDB(), eth::BaseState::Empty),  m_statePost(Address(), OverlayDB(), eth::BaseState::Empty), m_TestObject(_o) {}
    ImportTest(json_spirit::mObject& _o, bool isFiller);
    // imports
    void importEnv(json_spirit::mObject& _o);
    void importState(json_spirit::mObject& _o, eth::State& _state);
    void importTransaction(json_spirit::mObject& _o);
    void exportTest(bytes const& _output, eth::State const& _statePost);

    eth::State m_statePre;
    eth::State m_statePost;
    eth::ExtVMFace m_environment;
    eth::Transaction m_transaction;

private:
    json_spirit::mObject& m_TestObject;
};

// helping functions
u256 toInt(json_spirit::mValue const& _v);
byte toByte(json_spirit::mValue const& _v);
bytes importCode(json_spirit::mObject& _o);
bytes importData(json_spirit::mObject& _o);
bytes importByteArray(std::string const& _str);
eth::LogEntries importLog(json_spirit::mArray& _o);
json_spirit::mArray exportLog(eth::LogEntries _logs);
void checkOutput(bytes const& _output, json_spirit::mObject& _o);
void checkStorage(std::map<u256, u256> _expectedStore, std::map<u256, u256> _resultStore, Address _expectedAddr);
void checkLog(eth::LogEntries _resultLogs, eth::LogEntries _expectedLogs);
void checkCallCreates(eth::Transactions _resultCallCreates, eth::Transactions _expectedCallCreates);

void executeTests(const std::string& _name, const std::string& _testPathAppendix, std::function<void(json_spirit::mValue&, bool)> doTests);
std::string getTestPath();
void userDefinedTest(std::string testTypeFlag, std::function<void(json_spirit::mValue&, bool)> doTests);
RLPStream createRLPStreamFromTransactionFields(json_spirit::mObject& _tObj);
void processCommandLineOptions();
eth::LastHashes lastHashes(u256 _currentBlockNumber);

template<typename mapType>
void checkAddresses(mapType& _expectedAddrs, mapType& _resultAddrs)
{
    for (auto& resultPair : _resultAddrs)
    {
        auto& resultAddr = resultPair.first;
        auto expectedAddrIt = _expectedAddrs.find(resultAddr);
        if (expectedAddrIt == _expectedAddrs.end())
            BOOST_ERROR("Missing result address " << resultAddr);
    }
    BOOST_CHECK(_expectedAddrs == _resultAddrs);
}

}
}