//     __ _____ _____ _____
//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
// |  |  |__   |  |  | | | |  version 3.12.0
// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
//
// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
// SPDX-License-Identifier: MIT

// cmake/test.cmake builds a unit test with C++ standards beyond C++11 only if the
// source file mentions the corresponding version macro. To avoid rebuilding this
// large file for every standard, tests that depend on the standard version (e.g.,
// those using JSON_HAS_FILESYSTEM, JSON_HAS_RANGES, or JSON_HAS_THREE_WAY_COMPARISON)
// go into a separate file unit-conversions2-cpp<NN>.cpp. This file stays C++11-only.

#include "doctest_compatibility.h"

// skip tests if JSON_DisableEnumSerialization=ON (#4384)
#if defined(JSON_DISABLE_ENUM_SERIALIZATION) && (JSON_DISABLE_ENUM_SERIALIZATION == 1)
    #define SKIP_TESTS_FOR_ENUM_SERIALIZATION
#endif

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

#include <deque>
#include <forward_list>
#include <list>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <valarray>

// NLOHMANN_JSON_SERIALIZE_ENUM uses a static std::pair
DOCTEST_CLANG_SUPPRESS_WARNING_PUSH
DOCTEST_CLANG_SUPPRESS_WARNING("-Wexit-time-destructors")

TEST_CASE("value conversion")
{
    SECTION("get a binary value (explicit)")
    {
        json::binary_t const n_reference{{1, 2, 3}};
        json j(n_reference);

        SECTION("binary_t")
        {
            json::binary_t const b = j.get<json::binary_t>();
            CHECK(*json(b).m_data.m_value.binary == *j.m_data.m_value.binary);
        }

        SECTION("get_binary()")
        {
            SECTION("non-const")
            {
                auto& b = j.get_binary();
                CHECK(*json(b).m_data.m_value.binary == *j.m_data.m_value.binary);
            }

            SECTION("non-const")
            {
                const json j_const = j; // NOLINT(performance-unnecessary-copy-initialization)
                const auto& b = j_const.get_binary();
                CHECK(*json(b).m_data.m_value.binary == *j.m_data.m_value.binary);
            }
        }

        SECTION("exception in case of a non-string type")
        {
            json j_null(json::value_t::null);
            json j_object(json::value_t::object);
            json j_array(json::value_t::array);
            json j_string(json::value_t::string);
            json j_boolean(json::value_t::boolean);
            const json j_null_const(json::value_t::null);
            const json j_object_const(json::value_t::object);
            const json j_array_const(json::value_t::array);
            const json j_string_const(json::value_t::string);
            const json j_boolean_const(json::value_t::boolean);

            CHECK_THROWS_WITH_AS(j_null.get<json::binary_t>(),
                                 "[json.exception.type_error.302] type must be binary, but is null",
                                 json::type_error&);
            CHECK_THROWS_WITH_AS(j_object.get<json::binary_t>(),
                                 "[json.exception.type_error.302] type must be binary, but is object",
                                 json::type_error&);
            CHECK_THROWS_WITH_AS(j_array.get<json::binary_t>(),
                                 "[json.exception.type_error.302] type must be binary, but is array",
                                 json::type_error&);
            CHECK_THROWS_WITH_AS(j_string.get<json::binary_t>(),
                                 "[json.exception.type_error.302] type must be binary, but is string",
                                 json::type_error&);
            CHECK_THROWS_WITH_AS(j_boolean.get<json::binary_t>(),
                                 "[json.exception.type_error.302] type must be binary, but is boolean",
                                 json::type_error&);

            CHECK_THROWS_WITH_AS(j_null_const.get<json::binary_t>(),
                                 "[json.exception.type_error.302] type must be binary, but is null",
                                 json::type_error&);
            CHECK_THROWS_WITH_AS(j_object_const.get<json::binary_t>(),
                                 "[json.exception.type_error.302] type must be binary, but is object",
                                 json::type_error&);
            CHECK_THROWS_WITH_AS(j_array_const.get<json::binary_t>(),
                                 "[json.exception.type_error.302] type must be binary, but is array",
                                 json::type_error&);
            CHECK_THROWS_WITH_AS(j_string_const.get<json::binary_t>(),
                                 "[json.exception.type_error.302] type must be binary, but is string",
                                 json::type_error&);
            CHECK_THROWS_WITH_AS(j_boolean_const.get<json::binary_t>(),
                                 "[json.exception.type_error.302] type must be binary, but is boolean",
                                 json::type_error&);

            CHECK_THROWS_WITH_AS(j_null.get_binary(),
                                 "[json.exception.type_error.302] type must be binary, but is null",
                                 json::type_error&);
            CHECK_THROWS_WITH_AS(j_object.get_binary(),
                                 "[json.exception.type_error.302] type must be binary, but is object",
                                 json::type_error&);
            CHECK_THROWS_WITH_AS(j_array.get_binary(),
                                 "[json.exception.type_error.302] type must be binary, but is array",
                                 json::type_error&);
            CHECK_THROWS_WITH_AS(j_string.get_binary(),
                                 "[json.exception.type_error.302] type must be binary, but is string",
                                 json::type_error&);
            CHECK_THROWS_WITH_AS(j_boolean.get_binary(),
                                 "[json.exception.type_error.302] type must be binary, but is boolean",
                                 json::type_error&);

            CHECK_THROWS_WITH_AS(j_null_const.get_binary(),
                                 "[json.exception.type_error.302] type must be binary, but is null",
                                 json::type_error&);
            CHECK_THROWS_WITH_AS(j_object_const.get_binary(),
                                 "[json.exception.type_error.302] type must be binary, but is object",
                                 json::type_error&);
            CHECK_THROWS_WITH_AS(j_array_const.get_binary(),
                                 "[json.exception.type_error.302] type must be binary, but is array",
                                 json::type_error&);
            CHECK_THROWS_WITH_AS(j_string_const.get_binary(),
                                 "[json.exception.type_error.302] type must be binary, but is string",
                                 json::type_error&);
            CHECK_THROWS_WITH_AS(j_boolean_const.get_binary(),
                                 "[json.exception.type_error.302] type must be binary, but is boolean",
                                 json::type_error&);
        }
    }

#if JSON_USE_IMPLICIT_CONVERSIONS
    SECTION("get a binary value (implicit)")
    {
        json::binary_t const n_reference{{1, 2, 3}};
        json const j(n_reference);

        SECTION("binary_t")
        {
            json::binary_t const b = j;
            CHECK(*json(b).m_data.m_value.binary == *j.m_data.m_value.binary);
        }
    }
#endif

#ifndef SKIP_TESTS_FOR_ENUM_SERIALIZATION
    SECTION("get an enum")
    {
        enum c_enum { value_1, value_2 }; // NOLINT(cppcoreguidelines-use-enum-class)
        enum class cpp_enum { value_1, value_2 };

        CHECK(json(value_1).get<c_enum>() == value_1);
        CHECK(json(cpp_enum::value_1).get<cpp_enum>() == cpp_enum::value_1);
    }

    SECTION("get an enum with underlying type bool (#5671)")
    {
        enum class bool_enum : bool { off, on };

        // the extra parentheses keep doctest from printing the enum via its
        // underlying type, which MSVC 2015 reports as C4800
        CHECK((json(bool_enum::off).get<bool_enum>() == bool_enum::off));
        CHECK((json(bool_enum::on).get<bool_enum>() == bool_enum::on));
    }
#endif

    SECTION("more involved conversions")
    {
        SECTION("object-like STL containers")
        {
            json const j1 = {{"one", 1}, {"two", 2}, {"three", 3}};
            json const j2 = {{"one", 1u}, {"two", 2u}, {"three", 3u}};
            json const j3 = {{"one", 1.1}, {"two", 2.2}, {"three", 3.3}};
            json const j4 = {{"one", true}, {"two", false}, {"three", true}};
            json const j5 = {{"one", "eins"}, {"two", "zwei"}, {"three", "drei"}};

            SECTION("std::map")
            {
                CHECK(j1.get<std::map<std::string, int>>() == (std::map<std::string, int> {{"one", 1}, {"two", 2}, {"three", 3}}));
                CHECK(j2.get<std::map<std::string, unsigned int>>() == (std::map<std::string, unsigned int> {{"one", 1u}, {"two", 2u}, {"three", 3u}}));
                CHECK(j3.get<std::map<std::string, double>>() == (std::map<std::string, double> {{"one", 1.1}, {"two", 2.2}, {"three", 3.3}}));
                CHECK(j4.get<std::map<std::string, bool>>() == (std::map<std::string, bool> {{"one", true}, {"two", false}, {"three", true}}));
                CHECK(j5.get<std::map<std::string, std::string>>() == (std::map<std::string, std::string> {{"one", "eins"}, {"two", "zwei"}, {"three", "drei"}}));
            }

            SECTION("std::unordered_map")
            {
                CHECK(j1.get<std::unordered_map<std::string, int>>() == (std::unordered_map<std::string, int> {{"one", 1}, {"two", 2}, {"three", 3}}));
                CHECK(j2.get<std::unordered_map<std::string, unsigned int>>() == (std::unordered_map<std::string, unsigned int> {{"one", 1u}, {"two", 2u}, {"three", 3u}}));
                CHECK(j3.get<std::unordered_map<std::string, double>>() == (std::unordered_map<std::string, double> {{"one", 1.1}, {"two", 2.2}, {"three", 3.3}}));
                CHECK(j4.get<std::unordered_map<std::string, bool>>() == (std::unordered_map<std::string, bool> {{"one", true}, {"two", false}, {"three", true}}));
                const auto m5 = j5.get<std::unordered_map<std::string, std::string>>();
                CHECK(m5 == (std::unordered_map<std::string, std::string> {{"one", "eins"}, {"two", "zwei"}, {"three", "drei"}}));
                CHECK(m5.at("one") == "eins");
            }

            SECTION("reserve is called on containers that support it (#5406)")
            {
                // build a larger object so that a missing/incorrect reserve()
                // call would be more likely to corrupt or drop elements
                json j_large;
                for (int i = 0; i < 100; ++i)
                {
                    j_large[std::to_string(i)] = i;
                }

                SECTION("std::unordered_map (supports reserve)")
                {
                    const auto m = j_large.get<std::unordered_map<std::string, int>>();
                    CHECK(m.size() == 100);
                    for (int i = 0; i < 100; ++i)
                    {
                        CHECK(m.at(std::to_string(i)) == i);
                    }
                }

                SECTION("std::map (no reserve, fallback path)")
                {
                    const auto m = j_large.get<std::map<std::string, int>>();
                    CHECK(m.size() == 100);
                    for (int i = 0; i < 100; ++i)
                    {
                        CHECK(m.at(std::to_string(i)) == i);
                    }
                }
            }

            SECTION("std::multimap")
            {
                CHECK(j1.get<std::multimap<std::string, int>>() == (std::multimap<std::string, int> {{"one", 1}, {"two", 2}, {"three", 3}}));
                CHECK(j2.get<std::multimap<std::string, unsigned int>>() == (std::multimap<std::string, unsigned int> {{"one", 1u}, {"two", 2u}, {"three", 3u}}));
                CHECK(j3.get<std::multimap<std::string, double>>() == (std::multimap<std::string, double> {{"one", 1.1}, {"two", 2.2}, {"three", 3.3}}));
                CHECK(j4.get<std::multimap<std::string, bool>>() == (std::multimap<std::string, bool> {{"one", true}, {"two", false}, {"three", true}}));
                const auto m5 = j5.get<std::multimap<std::string, std::string>>();
                CHECK(m5 == (std::multimap<std::string, std::string> {{"one", "eins"}, {"two", "zwei"}, {"three", "drei"}}));
                CHECK(m5.find("one")->second == "eins");
            }

            SECTION("std::unordered_multimap")
            {
                CHECK(j1.get<std::unordered_multimap<std::string, int>>() == (std::unordered_multimap<std::string, int> {{"one", 1}, {"two", 2}, {"three", 3}}));
                CHECK(j2.get<std::unordered_multimap<std::string, unsigned int>>() == (std::unordered_multimap<std::string, unsigned int> {{"one", 1u}, {"two", 2u}, {"three", 3u}}));
                CHECK(j3.get<std::unordered_multimap<std::string, double>>() == (std::unordered_multimap<std::string, double> {{"one", 1.1}, {"two", 2.2}, {"three", 3.3}}));
                CHECK(j4.get<std::unordered_multimap<std::string, bool>>() == (std::unordered_multimap<std::string, bool> {{"one", true}, {"two", false}, {"three", true}}));
                const auto m5 = j5.get<std::unordered_multimap<std::string, std::string>>();
                CHECK(m5 == (std::unordered_multimap<std::string, std::string> {{"one", "eins"}, {"two", "zwei"}, {"three", "drei"}}));
                CHECK(m5.find("one")->second == "eins");
            }

            SECTION("exception in case of a non-object type")
            {
                CHECK_THROWS_WITH_AS(
                    (json().get<std::map<std::string, int>>()),
                    "[json.exception.type_error.302] type must be object, but is null", json::type_error&);
            }
        }

        SECTION("array-like STL containers")
        {
            json const j1 = {1, 2, 3, 4};
            json const j2 = {1u, 2u, 3u, 4u};
            json const j3 = {1.2, 2.3, 3.4, 4.5};
            json const j4 = {true, false, true};
            json const j5 = {"one", "two", "three"};

            SECTION("std::list")
            {
                CHECK(j1.get<std::list<int>>() == (std::list<int> {1, 2, 3, 4}));
                CHECK(j2.get<std::list<unsigned int>>() == (std::list<unsigned int> {1u, 2u, 3u, 4u}));
                CHECK(j3.get<std::list<double>>() == (std::list<double> {1.2, 2.3, 3.4, 4.5}));
                CHECK(j4.get<std::list<bool>>() == (std::list<bool> {true, false, true}));
                CHECK(j5.get<std::list<std::string>>() == (std::list<std::string> {"one", "two", "three"}));
            }

            SECTION("std::forward_list")
            {
                CHECK(j1.get<std::forward_list<int>>() == (std::forward_list<int> {1, 2, 3, 4}));
                CHECK(j2.get<std::forward_list<unsigned int>>() == (std::forward_list<unsigned int> {1u, 2u, 3u, 4u}));
                CHECK(j3.get<std::forward_list<double>>() == (std::forward_list<double> {1.2, 2.3, 3.4, 4.5}));
                CHECK(j4.get<std::forward_list<bool>>() == (std::forward_list<bool> {true, false, true}));
                CHECK(j5.get<std::forward_list<std::string>>() == (std::forward_list<std::string> {"one", "two", "three"}));
            }

            SECTION("std::array")
            {
                CHECK(j1.get<std::array<int, 4>>() == (std::array<int, 4> {{1, 2, 3, 4}}));
                // only the first 3 elements of j2 are converted, since the target array is smaller
                CHECK(j2.get<std::array<unsigned int, 3>>() == (std::array<unsigned int, 3> {{1u, 2u, 3u}}));
                CHECK(j3.get<std::array<double, 4>>() == (std::array<double, 4> {{1.2, 2.3, 3.4, 4.5}}));
                CHECK(j4.get<std::array<bool, 3>>() == (std::array<bool, 3> {{true, false, true}}));
                CHECK(j5.get<std::array<std::string, 3>>() == (std::array<std::string, 3> {{"one", "two", "three"}}));

                SECTION("std::array is larger than JSON")
                {
                    std::array<int, 6> arr6 = {{1, 2, 3, 4, 5, 6}};
                    CHECK_THROWS_WITH_AS(j1.get_to(arr6), "[json.exception.out_of_range.401] "
                                         "array index 4 is out of range", json::out_of_range&);
                }

                SECTION("std::array is smaller than JSON")
                {
                    std::array<int, 2> arr2 = {{8, 9}};
                    j1.get_to(arr2);
                    CHECK(arr2[0] == 1);
                    CHECK(arr2[1] == 2);
                }
            }

            SECTION("std::valarray")
            {
                // valarray has no operator== that returns bool, so compare via a vector copy
                const auto v1 = j1.get<std::valarray<int>>();
                CHECK((std::vector<int>(std::begin(v1), std::end(v1)) == std::vector<int> {1, 2, 3, 4}));
                const auto v2 = j2.get<std::valarray<unsigned int>>();
                CHECK((std::vector<unsigned int>(std::begin(v2), std::end(v2)) == std::vector<unsigned int> {1u, 2u, 3u, 4u}));
                const auto v3 = j3.get<std::valarray<double>>();
                CHECK((std::vector<double>(std::begin(v3), std::end(v3)) == std::vector<double> {1.2, 2.3, 3.4, 4.5}));
                const auto v4 = j4.get<std::valarray<bool>>();
                CHECK((std::vector<bool>(std::begin(v4), std::end(v4)) == std::vector<bool> {true, false, true}));
                const auto v5 = j5.get<std::valarray<std::string>>();
                CHECK((std::vector<std::string>(std::begin(v5), std::end(v5)) == std::vector<std::string> {"one", "two", "three"}));
            }

            SECTION("std::vector")
            {
                CHECK(j1.get<std::vector<int>>() == (std::vector<int> {1, 2, 3, 4}));
                CHECK(j2.get<std::vector<unsigned int>>() == (std::vector<unsigned int> {1u, 2u, 3u, 4u}));
                CHECK(j3.get<std::vector<double>>() == (std::vector<double> {1.2, 2.3, 3.4, 4.5}));
                CHECK(j4.get<std::vector<bool>>() == (std::vector<bool> {true, false, true}));
                CHECK(j5.get<std::vector<std::string>>() == (std::vector<std::string> {"one", "two", "three"}));
            }

            SECTION("std::deque")
            {
                CHECK(j1.get<std::deque<int>>() == (std::deque<int> {1, 2, 3, 4}));
                CHECK(j2.get<std::deque<unsigned int>>() == (std::deque<unsigned int> {1u, 2u, 3u, 4u}));
                CHECK(j3.get<std::deque<double>>() == (std::deque<double> {1.2, 2.3, 3.4, 4.5}));
                CHECK(j4.get<std::deque<bool>>() == (std::deque<bool> {true, false, true}));
                CHECK(j5.get<std::deque<std::string>>() == (std::deque<std::string> {"one", "two", "three"}));
            }

            SECTION("std::set")
            {
                CHECK(j1.get<std::set<int>>() == (std::set<int> {1, 2, 3, 4}));
                CHECK(j2.get<std::set<unsigned int>>() == (std::set<unsigned int> {1u, 2u, 3u, 4u}));
                CHECK(j3.get<std::set<double>>() == (std::set<double> {1.2, 2.3, 3.4, 4.5}));
                CHECK(j4.get<std::set<bool>>() == (std::set<bool> {true, false, true}));
                CHECK(j5.get<std::set<std::string>>() == (std::set<std::string> {"one", "two", "three"}));
            }

            SECTION("std::unordered_set")
            {
                CHECK(j1.get<std::unordered_set<int>>() == (std::unordered_set<int> {1, 2, 3, 4}));
                CHECK(j2.get<std::unordered_set<unsigned int>>() == (std::unordered_set<unsigned int> {1u, 2u, 3u, 4u}));
                CHECK(j3.get<std::unordered_set<double>>() == (std::unordered_set<double> {1.2, 2.3, 3.4, 4.5}));
                CHECK(j4.get<std::unordered_set<bool>>() == (std::unordered_set<bool> {true, false, true}));
                CHECK(j5.get<std::unordered_set<std::string>>() == (std::unordered_set<std::string> {"one", "two", "three"}));
            }

            SECTION("std::map (array of pairs)")
            {
                const std::map<int, int> m{{0, 1}, {1, 2}, {2, 3}};
                json const j6 = m;

                auto m2 = j6.get<std::map<int, int>>();
                CHECK(m == m2);

                json const j7 = {0, 1, 2, 3};
                json const j8 = 2;
#if JSON_DIAGNOSTICS
                CHECK_THROWS_WITH_AS((j7.get<std::map<int, int>>()),
                                     "[json.exception.type_error.302] (/0) type must be array, "
                                     "but is number", json::type_error&);
#else
                CHECK_THROWS_WITH_AS((j7.get<std::map<int, int>>()),
                                     "[json.exception.type_error.302] type must be array, "
                                     "but is number", json::type_error&);
#endif
                CHECK_THROWS_WITH_AS((j8.get<std::map<int, int>>()),
                                     "[json.exception.type_error.302] type must be array, "
                                     "but is number", json::type_error&);

                SECTION("superfluous entries")
                {
                    json const j9 = {{0, 1, 2}, {1, 2, 3}, {2, 3, 4}};
                    m2 = j9.get<std::map<int, int>>();
                    CHECK(m == m2);
                }
            }

            SECTION("std::unordered_map (array of pairs)")
            {
                const std::unordered_map<int, int> m{{0, 1}, {1, 2}, {2, 3}};
                json const j6 = m;

                auto m2 = j6.get<std::unordered_map<int, int>>();
                CHECK(m == m2);

                json const j7 = {0, 1, 2, 3};
                json const j8 = 2;
#if JSON_DIAGNOSTICS
                CHECK_THROWS_WITH_AS((j7.get<std::unordered_map<int, int>>()),
                                     "[json.exception.type_error.302] (/0) type must be array, "
                                     "but is number", json::type_error&);
#else
                CHECK_THROWS_WITH_AS((j7.get<std::unordered_map<int, int>>()),
                                     "[json.exception.type_error.302] type must be array, "
                                     "but is number", json::type_error&);
#endif
                CHECK_THROWS_WITH_AS((j8.get<std::unordered_map<int, int>>()),
                                     "[json.exception.type_error.302] type must be array, "
                                     "but is number", json::type_error&);

                SECTION("superfluous entries")
                {
                    json const j9{{0, 1, 2}, {1, 2, 3}, {2, 3, 4}};
                    m2 = j9.get<std::unordered_map<int, int>>();
                    CHECK(m == m2);
                }
            }

            SECTION("exception in case of a non-object type")
            {
                // does type really must be an array? or it rather must not be null?
                // that's what I thought when other test like this one broke
                CHECK_THROWS_WITH_AS(
                    (json().get<std::list<int>>()),
                    "[json.exception.type_error.302] type must be array, but is null", json::type_error&);
                CHECK_THROWS_WITH_AS(
                    (json().get<std::vector<int>>()),
                    "[json.exception.type_error.302] type must be array, but is null", json::type_error&);
                CHECK_THROWS_WITH_AS(
                    (json().get<std::vector<json>>()),
                    "[json.exception.type_error.302] type must be array, but is null", json::type_error&);
                CHECK_THROWS_WITH_AS(
                    (json().get<std::list<json>>()),
                    "[json.exception.type_error.302] type must be array, but is null", json::type_error&);
                CHECK_THROWS_WITH_AS(
                    (json().get<std::valarray<int>>()),
                    "[json.exception.type_error.302] type must be array, but is null", json::type_error&);
                CHECK_THROWS_WITH_AS(
                    (json().get<std::map<int, int>>()),
                    "[json.exception.type_error.302] type must be array, but is null", json::type_error&);
            }
        }
    }
}

enum class cards {kreuz, pik, herz, karo};

// NOLINTNEXTLINE(misc-use-internal-linkage,misc-const-correctness) - false positive
NLOHMANN_JSON_SERIALIZE_ENUM(cards,
{
    {cards::kreuz, "kreuz"},
    {cards::pik, "pik"},
    {cards::pik, "puk"},  // second entry for cards::puk; will not be used
    {cards::herz, "herz"},
    {cards::karo, "karo"}
})

enum TaskState // NOLINT(cert-int09-c,readability-enum-initial-value,cppcoreguidelines-use-enum-class)
{
    TS_STOPPED,
    TS_RUNNING,
    TS_COMPLETED,
    TS_INVALID = -1,
};

// NOLINTNEXTLINE(misc-const-correctness,misc-use-internal-linkage) - false positive
NLOHMANN_JSON_SERIALIZE_ENUM(TaskState,
{
    {TS_INVALID, nullptr},
    {TS_STOPPED, "stopped"},
    {TS_RUNNING, "running"},
    {TS_COMPLETED, "completed"},
})

TEST_CASE("JSON to enum mapping")
{
    SECTION("enum class")
    {
        // enum -> json
        CHECK(json(cards::kreuz) == "kreuz");
        CHECK(json(cards::pik) == "pik");
        CHECK(json(cards::herz) == "herz");
        CHECK(json(cards::karo) == "karo");

        // json -> enum
        CHECK(cards::kreuz == json("kreuz"));
        CHECK(cards::pik == json("pik"));
        CHECK(cards::herz == json("herz"));
        CHECK(cards::karo == json("karo"));

        // invalid json -> first enum
        CHECK(cards::kreuz == json("what?").get<cards>());
    }

    SECTION("traditional enum")
    {
        // enum -> json
        CHECK(json(TS_STOPPED) == "stopped");
        CHECK(json(TS_RUNNING) == "running");
        CHECK(json(TS_COMPLETED) == "completed");
        CHECK(json(TS_INVALID) == json());

        // json -> enum
        CHECK(TS_STOPPED == json("stopped"));
        CHECK(TS_RUNNING == json("running"));
        CHECK(TS_COMPLETED == json("completed"));
        CHECK(TS_INVALID == json());

        // invalid json -> first enum
        CHECK(TS_INVALID == json("what?").get<TaskState>());
    }
}

enum class strict_cards {kreuz, pik, herz, karo, andere}; // andere not included in mapping

// NOLINTNEXTLINE(misc-use-internal-linkage,misc-const-correctness) - false positive
NLOHMANN_JSON_SERIALIZE_ENUM_STRICT(strict_cards,
{
    {strict_cards::kreuz, "kreuz"},
    {strict_cards::pik, "pik"},
    {strict_cards::pik, "puk"},  // second entry for cards::pik; will not be used
    {strict_cards::herz, "herz"},
    {strict_cards::karo, "karo"}
})

enum StrictTaskState // NOLINT(cert-int09-c,readability-enum-initial-value,cppcoreguidelines-use-enum-class)
{
    STRICT_TS_STOPPED,
    STRICT_TS_RUNNING,
    STRICT_TS_COMPLETED,
    STRICT_TS_OTHER, // STRICT_TS_OTHER not in mapping
    STRICT_TS_INVALID = -1,
};

// NOLINTNEXTLINE(misc-const-correctness,misc-use-internal-linkage) - false positive
NLOHMANN_JSON_SERIALIZE_ENUM_STRICT(StrictTaskState,
{
    {STRICT_TS_INVALID, nullptr},
    {STRICT_TS_STOPPED, "stopped"},
    {STRICT_TS_RUNNING, "running"},
    {STRICT_TS_COMPLETED, "completed"},
})

// regression test for #5708 item 2: NLOHMANN_JSON_SERIALIZE_ENUM_STRICT must not rely on
// unqualified lookup of a helper name that a user's own namespace may also declare
namespace ns_with_colliding_name
{
// NOLINTNEXTLINE(misc-use-internal-linkage) - used to shadow the library's internal helper name
inline void templated_json_throw(int /*unused*/) {}

enum class colliding_enum { a, b };

// NOLINTNEXTLINE(misc-use-internal-linkage,misc-const-correctness,cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays) - false positive
NLOHMANN_JSON_SERIALIZE_ENUM_STRICT(colliding_enum,
{
    {colliding_enum::a, "a"},
    {colliding_enum::b, "b"}
})
} // namespace ns_with_colliding_name

TEST_CASE("NLOHMANN_JSON_SERIALIZE_ENUM_STRICT in a namespace with a colliding name")
{
    using ns_with_colliding_name::colliding_enum;

    CHECK(json(colliding_enum::a) == "a");
    CHECK(colliding_enum::b == json("b"));

    json _;
    CHECK_THROWS_WITH_AS(_ = json("nope").get<colliding_enum>(), "[json.exception.out_of_range.410] enum value out of range for colliding_enum: \"nope\"", json::out_of_range&);
}

TEST_CASE("Strict JSON to enum mapping")
{
    SECTION("enum class")
    {
        // enum -> json
        CHECK(json(strict_cards::kreuz) == "kreuz");
        CHECK(json(strict_cards::pik) == "pik");
        CHECK(json(strict_cards::herz) == "herz");
        CHECK(json(strict_cards::karo) == "karo");

        // json -> enum
        CHECK(json("kreuz").get<strict_cards>() == strict_cards::kreuz);
        CHECK(json("pik").get<strict_cards>() == strict_cards::pik);
        CHECK(json("herz").get<strict_cards>() == strict_cards::herz);
        CHECK(json("karo").get<strict_cards>() == strict_cards::karo);

        // comparison of enum and json
        CHECK(strict_cards::kreuz == json("kreuz"));
        CHECK(strict_cards::pik == json("pik"));
        CHECK(strict_cards::herz == json("herz"));
        CHECK(strict_cards::karo == json("karo"));

        // invalid json -> exception thrown
        json _;
        CHECK_THROWS_WITH_AS(_ = json("what?").get<strict_cards>(), "[json.exception.out_of_range.410] enum value out of range for strict_cards: \"what?\"", json::out_of_range&);

        // conversion of unmapped enum -> exception thrown
        CHECK_THROWS_WITH_AS(json(strict_cards::andere), "[json.exception.out_of_range.410] enum value out of range for strict_cards", json::out_of_range&);

        // comparing an unmapped enum with json throws the same exception
        // (the scalar comparison operators used to be noexcept, so this
        // called std::terminate)
        CHECK_THROWS_WITH_AS(static_cast<void>(strict_cards::andere == json("andere")), "[json.exception.out_of_range.410] enum value out of range for strict_cards", json::out_of_range&);
        CHECK_THROWS_WITH_AS(static_cast<void>(json("andere") != strict_cards::andere), "[json.exception.out_of_range.410] enum value out of range for strict_cards", json::out_of_range&);

        // invalid UTF-8 -> out_of_range.410, not the type_error.316 thrown while building the
        // message (regression test for #5667); such strings can reach get<Enum>() unvalidated,
        // e.g. from from_cbor()/from_msgpack() (#5529)
        const json j_invalid_utf8 = "\xFF";
        CHECK_THROWS_WITH_AS(_ = j_invalid_utf8.get<strict_cards>(), "[json.exception.out_of_range.410] enum value out of range for strict_cards: \"\xEF\xBF\xBD\"", json::out_of_range&);
    }

    SECTION("traditional enum")
    {
        // enum -> json
        CHECK(json(STRICT_TS_STOPPED) == "stopped");
        CHECK(json(STRICT_TS_RUNNING) == "running");
        CHECK(json(STRICT_TS_COMPLETED) == "completed");
        CHECK(json(STRICT_TS_INVALID) == json());

        // json -> enum
        CHECK(json("stopped").get<StrictTaskState>() == STRICT_TS_STOPPED);
        CHECK(json("running").get<StrictTaskState>() == STRICT_TS_RUNNING);
        CHECK(json("completed").get<StrictTaskState>() == STRICT_TS_COMPLETED);
        CHECK(json().get<StrictTaskState>() == STRICT_TS_INVALID);

        // comparison of enum and json
        CHECK(STRICT_TS_STOPPED == json("stopped"));
        CHECK(STRICT_TS_RUNNING == json("running"));
        CHECK(STRICT_TS_COMPLETED == json("completed"));
        CHECK(STRICT_TS_INVALID == json());

        // invalid json -> exception thrown
        json _;
        CHECK_THROWS_WITH_AS(_ = json("what?").get<StrictTaskState>(), "[json.exception.out_of_range.410] enum value out of range for StrictTaskState: \"what?\"", json::out_of_range&);

        // conversion of unmapped enum -> exception thrown
        CHECK_THROWS_WITH_AS(json(STRICT_TS_OTHER), "[json.exception.out_of_range.410] enum value out of range for StrictTaskState", json::out_of_range&);

        // comparing an unmapped enum with json throws the same exception
        CHECK_THROWS_WITH_AS(static_cast<void>(STRICT_TS_OTHER < json("x")), "[json.exception.out_of_range.410] enum value out of range for StrictTaskState", json::out_of_range&);
    }
}

DOCTEST_CLANG_SUPPRESS_WARNING_POP