solidity/test/libsolidity/Metadata.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/>.
 */
/**
 * @date 2017
 * Unit tests for the metadata output.
 */

#include <test/Metadata.h>
#include <test/Options.h>
#include <libsolidity/interface/CompilerStack.h>
#include <libdevcore/SwarmHash.h>
#include <libdevcore/JSON.h>

using namespace std;

namespace dev
{
namespace solidity
{
namespace test
{

namespace
{
map<string, string> requireParsedCBORMetadata(bytes const& _bytecode)
{
	bytes cborMetadata = dev::test::onlyMetadata(_bytecode);
	BOOST_REQUIRE(!cborMetadata.empty());
	boost::optional<map<string, string>> tmp = dev::test::parseCBORMetadata(cborMetadata);
	BOOST_REQUIRE(tmp);
	return *tmp;
}
}

BOOST_AUTO_TEST_SUITE(Metadata)

BOOST_AUTO_TEST_CASE(metadata_stamp)
{
	// Check that the metadata stamp is at the end of the runtime bytecode.
	char const* sourceCode = R"(
		pragma solidity >=0.0;
		pragma experimental __testOnlyAnalysis;
		contract test {
			function g(function(uint) external returns (uint) x) public {}
		}
	)";
	CompilerStack compilerStack;
	compilerStack.setSources({{"", std::string(sourceCode)}});
	compilerStack.setEVMVersion(dev::test::Options::get().evmVersion());
	compilerStack.setOptimiserSettings(dev::test::Options::get().optimize);
	BOOST_REQUIRE_MESSAGE(compilerStack.compile(), "Compiling contract failed");
	bytes const& bytecode = compilerStack.runtimeObject("test").bytecode;
	std::string const& metadata = compilerStack.metadata("test");
	BOOST_CHECK(dev::test::isValidMetadata(metadata));
	bytes hash = dev::swarmHash(metadata).asBytes();
	BOOST_REQUIRE(hash.size() == 32);
	auto const cborMetadata = requireParsedCBORMetadata(bytecode);
	BOOST_CHECK(cborMetadata.size() == 1);
	BOOST_CHECK(cborMetadata.count("bzzr0") == 1);
	BOOST_CHECK(cborMetadata.at("bzzr0") == toHex(hash));
}

BOOST_AUTO_TEST_CASE(metadata_stamp_experimental)
{
	// Check that the metadata stamp is at the end of the runtime bytecode.
	char const* sourceCode = R"(
		pragma solidity >=0.0;
		pragma experimental __test;
		contract test {
			function g(function(uint) external returns (uint) x) public {}
		}
	)";
	CompilerStack compilerStack;
	compilerStack.setSources({{"", std::string(sourceCode)}});
	compilerStack.setEVMVersion(dev::test::Options::get().evmVersion());
	compilerStack.setOptimiserSettings(dev::test::Options::get().optimize);
	BOOST_REQUIRE_MESSAGE(compilerStack.compile(), "Compiling contract failed");
	bytes const& bytecode = compilerStack.runtimeObject("test").bytecode;
	std::string const& metadata = compilerStack.metadata("test");
	BOOST_CHECK(dev::test::isValidMetadata(metadata));
	bytes hash = dev::swarmHash(metadata).asBytes();
	BOOST_REQUIRE(hash.size() == 32);
	auto const cborMetadata = requireParsedCBORMetadata(bytecode);
	BOOST_CHECK(cborMetadata.size() == 2);
	BOOST_CHECK(cborMetadata.count("bzzr0") == 1);
	BOOST_CHECK(cborMetadata.at("bzzr0") == toHex(hash));
	BOOST_CHECK(cborMetadata.count("experimental") == 1);
	BOOST_CHECK(cborMetadata.at("experimental") == "true");
}

BOOST_AUTO_TEST_CASE(metadata_relevant_sources)
{
	CompilerStack compilerStack;
	char const* sourceCodeA = R"(
		pragma solidity >=0.0;
		contract A {
			function g(function(uint) external returns (uint) x) public {}
		}
	)";
	char const* sourceCodeB = R"(
		pragma solidity >=0.0;
		contract B {
			function g(function(uint) external returns (uint) x) public {}
		}
	)";
	compilerStack.setSources({
		{"A", std::string(sourceCodeA)},
		{"B", std::string(sourceCodeB)},
	});
	compilerStack.setEVMVersion(dev::test::Options::get().evmVersion());
	compilerStack.setOptimiserSettings(dev::test::Options::get().optimize);
	BOOST_REQUIRE_MESSAGE(compilerStack.compile(), "Compiling contract failed");

	std::string const& serialisedMetadata = compilerStack.metadata("A");
	BOOST_CHECK(dev::test::isValidMetadata(serialisedMetadata));
	Json::Value metadata;
	BOOST_REQUIRE(jsonParseStrict(serialisedMetadata, metadata));

	BOOST_CHECK_EQUAL(metadata["sources"].size(), 1);
	BOOST_CHECK(metadata["sources"].isMember("A"));
}

BOOST_AUTO_TEST_CASE(metadata_relevant_sources_imports)
{
	CompilerStack compilerStack;
	char const* sourceCodeA = R"(
		pragma solidity >=0.0;
		contract A {
			function g(function(uint) external returns (uint) x) public {}
		}
	)";
	char const* sourceCodeB = R"(
		pragma solidity >=0.0;
		import "./A";
		contract B is A {
			function g(function(uint) external returns (uint) x) public {}
		}
	)";
	char const* sourceCodeC = R"(
		pragma solidity >=0.0;
		import "./B";
		contract C is B {
			function g(function(uint) external returns (uint) x) public {}
		}
	)";
	compilerStack.setSources({
		{"A", std::string(sourceCodeA)},
		{"B", std::string(sourceCodeB)},
		{"C", std::string(sourceCodeC)}
	});
	compilerStack.setEVMVersion(dev::test::Options::get().evmVersion());
	compilerStack.setOptimiserSettings(dev::test::Options::get().optimize);
	BOOST_REQUIRE_MESSAGE(compilerStack.compile(), "Compiling contract failed");

	std::string const& serialisedMetadata = compilerStack.metadata("C");
	BOOST_CHECK(dev::test::isValidMetadata(serialisedMetadata));
	Json::Value metadata;
	BOOST_REQUIRE(jsonParseStrict(serialisedMetadata, metadata));

	BOOST_CHECK_EQUAL(metadata["sources"].size(), 3);
	BOOST_CHECK(metadata["sources"].isMember("A"));
	BOOST_CHECK(metadata["sources"].isMember("B"));
	BOOST_CHECK(metadata["sources"].isMember("C"));
}

BOOST_AUTO_TEST_CASE(metadata_useLiteralContent)
{
	// Check that the metadata contains "useLiteralContent"
	char const* sourceCode = R"(
		pragma solidity >=0.0;
		contract test {
		}
	)";

	auto check = [](char const* _src, bool _check)
	{
		CompilerStack compilerStack;
		compilerStack.setSources({{"", std::string(_src)}});
		compilerStack.setEVMVersion(dev::test::Options::get().evmVersion());
		compilerStack.setOptimiserSettings(dev::test::Options::get().optimize);
		compilerStack.useMetadataLiteralSources(_check);
		BOOST_REQUIRE_MESSAGE(compilerStack.compile(), "Compiling contract failed");
		string metadata_str = compilerStack.metadata("test");
		Json::Value metadata;
		jsonParse(metadata_str, metadata);
		BOOST_CHECK(metadata.isMember("settings"));
		BOOST_CHECK(metadata["settings"].isMember("useLiteralContent"));
		BOOST_CHECK(_check == metadata["settings"]["useLiteralContent"].asBool());
		BOOST_CHECK(dev::test::isValidMetadata(metadata_str));

	};

	check(sourceCode, true);
	check(sourceCode, false);
}

BOOST_AUTO_TEST_SUITE_END()

}
}
}