unit-disabled_exceptions.cpp 3.47 KB
/*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
|  |  |__   |  |  | | | |  version 3.9.1
|_____|_____|_____|_|___|  https://github.com/nlohmann/json

Licensed under the MIT License <http://opensource.org/licenses/MIT>.
SPDX-License-Identifier: MIT
Copyright (c) 2013-2019 Niels Lohmann <http://nlohmann.me>.

Permission is hereby  granted, free of charge, to any  person obtaining a copy
of this software and associated  documentation files (the "Software"), to deal
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The above copyright notice and this permission notice shall be included in all
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THE SOFTWARE  IS PROVIDED "AS  IS", WITHOUT WARRANTY  OF ANY KIND,  EXPRESS OR
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LIABILITY, WHETHER IN AN ACTION OF  CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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*/

#include "doctest_compatibility.h"

#include <nlohmann/json.hpp>
using json = nlohmann::json;

/////////////////////////////////////////////////////////////////////
// for #2824
/////////////////////////////////////////////////////////////////////

class sax_no_exception : public nlohmann::detail::json_sax_dom_parser<json>
{
  public:
    explicit sax_no_exception(json& j) : nlohmann::detail::json_sax_dom_parser<json>(j, false) {}

    static bool parse_error(std::size_t /*position*/, const std::string& /*last_token*/, const json::exception& ex)
    {
        error_string = new std::string(ex.what()); // NOLINT(cppcoreguidelines-owning-memory)
        return false;
    }

    static std::string* error_string;
};

std::string* sax_no_exception::error_string = nullptr;

//
#include <cstddef> // size_t
#include <exception> // exception
#include <stdexcept> // runtime_error
#include <string> // to_string
#include <vector> // vector

//
namespace nlohmann
{
namespace detail2
{

class exception : public std::exception
{
  public:
    const char* what() const noexcept override
    {
        return m.what();
    }

  protected:
    exception(const char* what_arg) : m(what_arg) {}

  private:
    std::runtime_error m;
};

class parse_error : public exception
{
  public:
    parse_error(const char* what_arg) : exception(what_arg) {}
};

}  // namespace detail2
}  // namespace nlohmann
//

TEST_CASE("Tests with disabled exceptions")
{
    SECTION("issue #2824 - encoding of json::exception::what()")
    {
        json j;
        sax_no_exception sax(j);

        CHECK (!json::sax_parse("xyz", &sax));
        //CHECK(*sax_no_exception::error_string == "[json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - invalid literal; last read: 'x'");
        delete sax_no_exception::error_string; // NOLINT(cppcoreguidelines-owning-memory)
    }

    SECTION("test")
    {
        std::string w = "[json.exception.parse_error] foo";
        auto error = nlohmann::detail2::parse_error(w.c_str());
        CHECK(std::string(error.what()) == "[json.exception.parse_error] foo");
    }
}