path: root/test/libsolidity/SyntaxTest.cpp

/*
    This file is part of solidity.

    solidity 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.

    solidity 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 solidity.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <test/libsolidity/SyntaxTest.h>
#include <test/Options.h>
#include <boost/algorithm/string.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/throw_exception.hpp>
#include <cctype>
#include <fstream>
#include <memory>
#include <stdexcept>

using namespace dev;
using namespace solidity;
using namespace dev::solidity::test;
using namespace dev::solidity::test::formatting;
using namespace std;
namespace fs = boost::filesystem;
using namespace boost::unit_test;

template<typename IteratorType>
void skipWhitespace(IteratorType& _it, IteratorType _end)
{
    while (_it != _end && isspace(*_it))
        ++_it;
}

template<typename IteratorType>
void skipSlashes(IteratorType& _it, IteratorType _end)
{
    while (_it != _end && *_it == '/')
        ++_it;
}

void expect(string::iterator& _it, string::iterator _end, string::value_type _c)
{
    if (_it == _end || *_it != _c)
        throw runtime_error(string("Invalid test expectation. Expected: \"") + _c + "\".");
    ++_it;
}

int parseUnsignedInteger(string::iterator &_it, string::iterator _end)
{
    if (_it == _end || !isdigit(*_it))
        throw runtime_error("Invalid test expectation. Source location expected.");
    int result = 0;
    while (_it != _end && isdigit(*_it))
    {
        result *= 10;
        result += *_it - '0';
        ++_it;
    }
    return result;
}

SyntaxTest::SyntaxTest(string const& _filename)
{
    ifstream file(_filename);
    if (!file)
        BOOST_THROW_EXCEPTION(runtime_error("Cannot open test contract: \"" + _filename + "\"."));
    file.exceptions(ios::badbit);

    m_source = parseSource(file);
    m_expectations = parseExpectations(file);
}

bool SyntaxTest::run(ostream& _stream, string const& _linePrefix, bool const _formatted)
{
    string const versionPragma = "pragma solidity >=0.0;\n";
    m_compiler.reset();
    m_compiler.addSource("", versionPragma + m_source);
    m_compiler.setEVMVersion(dev::test::Options::get().evmVersion());

    if (m_compiler.parse())
        m_compiler.analyze();

    for (auto const& currentError: filterErrors(m_compiler.errors(), true))
    {
        int locationStart = -1, locationEnd = -1;
        if (auto location = boost::get_error_info<errinfo_sourceLocation>(*currentError))
        {
            // ignore the version pragma inserted by the testing tool when calculating locations.
            if (location->start >= static_cast<int>(versionPragma.size()))
                locationStart = location->start - versionPragma.size();
            if (location->end >= static_cast<int>(versionPragma.size()))
                locationEnd = location->end - versionPragma.size();
        }
        m_errorList.emplace_back(SyntaxTestError{
            currentError->typeName(),
            errorMessage(*currentError),
            locationStart,
            locationEnd
        });
    }

    if (m_expectations != m_errorList)
    {
        string nextIndentLevel = _linePrefix + "  ";
        FormattedScope(_stream, _formatted, {BOLD, CYAN}) << _linePrefix << "Expected result:" << endl;
        printErrorList(_stream, m_expectations, nextIndentLevel, _formatted);
        FormattedScope(_stream, _formatted, {BOLD, CYAN}) << _linePrefix << "Obtained result:" << endl;
        printErrorList(_stream, m_errorList, nextIndentLevel, _formatted);
        return false;
    }
    return true;
}

void SyntaxTest::printErrorList(
    ostream& _stream,
    vector<SyntaxTestError> const& _errorList,
    string const& _linePrefix,
    bool const _formatted
)
{
    if (_errorList.empty())
        FormattedScope(_stream, _formatted, {BOLD, GREEN}) << _linePrefix << "Success" << endl;
    else
        for (auto const& error: _errorList)
        {
            {
                FormattedScope scope(_stream, _formatted, {BOLD, (error.type == "Warning") ? YELLOW : RED});
                _stream << _linePrefix;
                _stream << error.type << ": ";
            }
            if (error.locationStart >= 0 || error.locationEnd >= 0)
            {
                _stream << "(";
                if (error.locationStart >= 0)
                    _stream << error.locationStart;
                _stream << "-";
                if (error.locationEnd >= 0)
                    _stream << error.locationEnd;
                _stream << "): ";
            }
            _stream << error.message << endl;
        }
}

string SyntaxTest::errorMessage(Exception const& _e)
{
    if (_e.comment() && !_e.comment()->empty())
        return boost::replace_all_copy(*_e.comment(), "\n", "\\n");
    else
        return "NONE";
}

string SyntaxTest::parseSource(istream& _stream)
{
    string source;
    string line;
    string const delimiter("// ----");
    while (getline(_stream, line))
        if (boost::algorithm::starts_with(line, delimiter))
            break;
        else
            source += line + "\n";
    return source;
}

vector<SyntaxTestError> SyntaxTest::parseExpectations(istream& _stream)
{
    vector<SyntaxTestError> expectations;
    string line;
    while (getline(_stream, line))
    {
        auto it = line.begin();

        skipSlashes(it, line.end());
        skipWhitespace(it, line.end());

        if (it == line.end()) continue;

        auto typeBegin = it;
        while (it != line.end() && *it != ':')
            ++it;
        string errorType(typeBegin, it);

        // skip colon
        if (it != line.end()) it++;

        skipWhitespace(it, line.end());

        int locationStart = -1;
        int locationEnd = -1;

        if (it != line.end() && *it == '(')
        {
            ++it;
            locationStart = parseUnsignedInteger(it, line.end());
            expect(it, line.end(), '-');
            locationEnd = parseUnsignedInteger(it, line.end());
            expect(it, line.end(), ')');
            expect(it, line.end(), ':');
        }

        skipWhitespace(it, line.end());

        string errorMessage(it, line.end());
        expectations.emplace_back(SyntaxTestError{
            move(errorType),
            move(errorMessage),
            locationStart,
            locationEnd
        });
    }
    return expectations;
}

#if BOOST_VERSION < 105900
test_case *make_test_case(
    function<void()> const& _fn,
    string const& _name,
    string const& /* _filename */,
    size_t /* _line */
)
{
    return make_test_case(_fn, _name);
}
#endif

bool SyntaxTest::isTestFilename(boost::filesystem::path const& _filename)
{
    return _filename.extension().string() == ".sol" &&
        !boost::starts_with(_filename.string(), "~") &&
        !boost::starts_with(_filename.string(), ".");
}

int SyntaxTest::registerTests(
    boost::unit_test::test_suite& _suite,
    boost::filesystem::path const& _basepath,
    boost::filesystem::path const& _path
)
{
    int numTestsAdded = 0;
    fs::path fullpath = _basepath / _path;
    if (fs::is_directory(fullpath))
    {
        test_suite* sub_suite = BOOST_TEST_SUITE(_path.filename().string());
        for (auto const& entry: boost::iterator_range<fs::directory_iterator>(
            fs::directory_iterator(fullpath),
            fs::directory_iterator()
        ))
            if (fs::is_directory(entry.path()) || isTestFilename(entry.path().filename()))
                numTestsAdded += registerTests(*sub_suite, _basepath, _path / entry.path().filename());
        _suite.add(sub_suite);
    }
    else
    {
        static vector<unique_ptr<string>> filenames;

        filenames.emplace_back(new string(_path.string()));
        _suite.add(make_test_case(
            [fullpath]
            {
                BOOST_REQUIRE_NO_THROW({
                    stringstream errorStream;
                    if (!SyntaxTest(fullpath.string()).run(errorStream))
                        BOOST_ERROR("Test expectation mismatch.\n" + errorStream.str());
                });
            },
            _path.stem().string(),
            *filenames.back(),
            0
        ));
        numTestsAdded = 1;
    }
    return numTestsAdded;
}