path: root/SolidityABIJSON.cpp

/*
    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/>.
 */
/**
 * @author Marek Kotewicz <marek@ethdev.com>
 * @date 2014
 * Unit tests for the solidity compiler JSON Interface output.
 */

#include <boost/test/unit_test.hpp>
#include <libsolidity/CompilerStack.h>
#include <jsoncpp/json/json.h>
#include <libdevcore/Exceptions.h>

namespace dev
{
namespace solidity
{
namespace test
{

class InterfaceChecker
{
public:
    InterfaceChecker(): m_compilerStack(false) {}

    void checkInterface(std::string const& _code, std::string const& _expectedInterfaceString)
    {
        try
        {
            m_compilerStack.parse(_code);
        }
        catch(boost::exception const& _e)
        {
            auto msg = std::string("Parsing contract failed with: ") + boost::diagnostic_information(_e);
            BOOST_FAIL(msg);
        }
        std::string generatedInterfaceString = m_compilerStack.getMetadata("", DocumentationType::ABI_INTERFACE);
        Json::Value generatedInterface;
        m_reader.parse(generatedInterfaceString, generatedInterface);
        Json::Value expectedInterface;
        m_reader.parse(_expectedInterfaceString, expectedInterface);
        BOOST_CHECK_MESSAGE(expectedInterface == generatedInterface,
                            "Expected " << _expectedInterfaceString <<
                            "\n but got:\n" << generatedInterfaceString);
    }

private:
    CompilerStack m_compilerStack;
    Json::Reader m_reader;
};

BOOST_FIXTURE_TEST_SUITE(SolidityABIJSON, InterfaceChecker)

BOOST_AUTO_TEST_CASE(basic_test)
{
    char const* sourceCode = "contract test {\n"
    "  function f(uint a) returns(uint d) { return a * 7; }\n"
    "}\n";

    char const* interface = R"([
    {
        "name": "f",
        "constant": false,
        "inputs": [
        {
            "name": "a",
            "type": "uint256"
        }
        ],
        "outputs": [
        {
            "name": "d",
            "type": "uint256"
        }
        ]
    }
    ])";

    checkInterface(sourceCode, interface);
}

BOOST_AUTO_TEST_CASE(empty_contract)
{
    char const* sourceCode = "contract test {\n"
    "}\n";

    char const* interface = "[]";

    checkInterface(sourceCode, interface);
}

BOOST_AUTO_TEST_CASE(multiple_methods)
{
    char const* sourceCode = "contract test {\n"
    "  function f(uint a) returns(uint d) { return a * 7; }\n"
    "  function g(uint b) returns(uint e) { return b * 8; }\n"
    "}\n";

    char const* interface = R"([
    {
        "name": "f",
        "constant": false,
        "inputs": [
        {
            "name": "a",
            "type": "uint256"
        }
        ],
        "outputs": [
        {
            "name": "d",
            "type": "uint256"
        }
        ]
    },
    {
        "name": "g",
        "constant": false,
        "inputs": [
        {
            "name": "b",
            "type": "uint256"
        }
        ],
        "outputs": [
        {
            "name": "e",
            "type": "uint256"
        }
        ]
    }
    ])";

    checkInterface(sourceCode, interface);
}

BOOST_AUTO_TEST_CASE(multiple_params)
{
    char const* sourceCode = "contract test {\n"
    "  function f(uint a, uint b) returns(uint d) { return a + b; }\n"
    "}\n";

    char const* interface = R"([
    {
        "name": "f",
        "constant": false,
        "inputs": [
        {
            "name": "a",
            "type": "uint256"
        },
        {
            "name": "b",
            "type": "uint256"
        }
        ],
        "outputs": [
        {
            "name": "d",
            "type": "uint256"
        }
        ]
    }
    ])";

    checkInterface(sourceCode, interface);
}

BOOST_AUTO_TEST_CASE(multiple_methods_order)
{
    // methods are expected to be in alpabetical order
    char const* sourceCode = "contract test {\n"
    "  function f(uint a) returns(uint d) { return a * 7; }\n"
    "  function c(uint b) returns(uint e) { return b * 8; }\n"
    "}\n";

    char const* interface = R"([
    {
        "name": "c",
        "constant": false,
        "inputs": [
        {
            "name": "b",
            "type": "uint256"
        }
        ],
        "outputs": [
        {
            "name": "e",
            "type": "uint256"
        }
        ]
    },
    {
        "name": "f",
        "constant": false,
        "inputs": [
        {
            "name": "a",
            "type": "uint256"
        }
        ],
        "outputs": [
        {
            "name": "d",
            "type": "uint256"
        }
        ]
    }
    ])";

    checkInterface(sourceCode, interface);
}

BOOST_AUTO_TEST_CASE(const_function)
{
    char const* sourceCode = "contract test {\n"
    "  function foo(uint a, uint b) returns(uint d) { return a + b; }\n"
    "  function boo(uint32 a) constant returns(uint b) { return a * 4; }\n"
    "}\n";

    char const* interface = R"([
    {
        "name": "foo",
        "constant": false,
        "inputs": [
        {
            "name": "a",
            "type": "uint256"
        },
        {
            "name": "b",
            "type": "uint256"
        }
        ],
        "outputs": [
        {
            "name": "d",
            "type": "uint256"
        }
        ]
    },
    {
        "name": "boo",
        "constant": true,
        "inputs": [{
            "name": "a",
            "type": "uint32"
        }],
        "outputs": [
        {
            "name": "b",
            "type": "uint256"
        }
        ]
    }
    ])";

    checkInterface(sourceCode, interface);
}

BOOST_AUTO_TEST_SUITE_END()

}
}
}