test/src/unit-ordered_map.cpp

/*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
|  |  |__   |  |  | | | |  version 3.10.0
|_____|_____|_____|_|___|  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
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in the Software  without restriction, including without  limitation the rights
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copies  of  the Software,  and  to  permit persons  to  whom  the Software  is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE  IS PROVIDED "AS  IS", WITHOUT WARRANTY  OF ANY KIND,  EXPRESS OR
IMPLIED,  INCLUDING BUT  NOT  LIMITED TO  THE  WARRANTIES OF  MERCHANTABILITY,
FITNESS FOR  A PARTICULAR PURPOSE AND  NONINFRINGEMENT. IN NO EVENT  SHALL THE
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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 nlohmann::ordered_map;


TEST_CASE("ordered_map")
{
    SECTION("constructor")
    {
        SECTION("constructor from iterator range")
        {
            std::map<std::string, std::string> m {{"eins", "one"}, {"zwei", "two"}, {"drei", "three"}};
            ordered_map<std::string, std::string> om(m.begin(), m.end());
            CHECK(om.size() == 3);
        }

        SECTION("copy assignment")
        {
            std::map<std::string, std::string> m {{"eins", "one"}, {"zwei", "two"}, {"drei", "three"}};
            ordered_map<std::string, std::string> om(m.begin(), m.end());
            const auto com = om;
            om.clear(); // silence a warning by forbidding having "const auto& com = om;"
            CHECK(com.size() == 3);
        }
    }

    SECTION("at")
    {
        std::map<std::string, std::string> m {{"eins", "one"}, {"zwei", "two"}, {"drei", "three"}};
        ordered_map<std::string, std::string> om(m.begin(), m.end());
        const auto com = om;

        SECTION("with Key&&")
        {
            CHECK(om.at(std::string("eins")) == std::string("one"));
            CHECK(com.at(std::string("eins")) == std::string("one"));
            CHECK_THROWS_AS(om.at(std::string("vier")), std::out_of_range);
            CHECK_THROWS_AS(com.at(std::string("vier")), std::out_of_range);
        }

        SECTION("with const Key&&")
        {
            const std::string eins = "eins";
            const std::string vier = "vier";
            CHECK(om.at(eins) == std::string("one"));
            CHECK(com.at(eins) == std::string("one"));
            CHECK_THROWS_AS(om.at(vier), std::out_of_range);
            CHECK_THROWS_AS(com.at(vier), std::out_of_range);
        }

        SECTION("with string literal")
        {
            CHECK(om.at("eins") == std::string("one"));
            CHECK(com.at("eins") == std::string("one"));
            CHECK_THROWS_AS(om.at("vier"), std::out_of_range);
            CHECK_THROWS_AS(com.at("vier"), std::out_of_range);
        }
    }

    SECTION("operator[]")
    {
        std::map<std::string, std::string> m {{"eins", "one"}, {"zwei", "two"}, {"drei", "three"}};
        ordered_map<std::string, std::string> om(m.begin(), m.end());
        const auto com = om;

        SECTION("with Key&&")
        {
            CHECK(om[std::string("eins")] == std::string("one"));
            CHECK(com[std::string("eins")] == std::string("one"));

            CHECK(om[std::string("vier")] == std::string(""));
            CHECK(om.size() == 4);
        }

        SECTION("with const Key&&")
        {
            const std::string eins = "eins";
            const std::string vier = "vier";

            CHECK(om[eins] == std::string("one"));
            CHECK(com[eins] == std::string("one"));

            CHECK(om[vier] == std::string(""));
            CHECK(om.size() == 4);
        }

        SECTION("with string literal")
        {
            CHECK(om["eins"] == std::string("one"));
            CHECK(com["eins"] == std::string("one"));

            CHECK(om["vier"] == std::string(""));
            CHECK(om.size() == 4);
        }
    }

    SECTION("erase")
    {
        ordered_map<std::string, std::string> om;
        om["eins"] = "one";
        om["zwei"] = "two";
        om["drei"] = "three";

        {
            auto it = om.begin();
            CHECK(it->first == "eins");
            ++it;
            CHECK(it->first == "zwei");
            ++it;
            CHECK(it->first == "drei");
            ++it;
            CHECK(it == om.end());
        }

        SECTION("with Key&&")
        {
            CHECK(om.size() == 3);
            CHECK(om.erase(std::string("eins")) == 1);
            CHECK(om.size() == 2);
            CHECK(om.erase(std::string("vier")) == 0);
            CHECK(om.size() == 2);

            auto it = om.begin();
            CHECK(it->first == "zwei");
            ++it;
            CHECK(it->first == "drei");
            ++it;
            CHECK(it == om.end());
        }

        SECTION("with const Key&&")
        {
            const std::string eins = "eins";
            const std::string vier = "vier";
            CHECK(om.size() == 3);
            CHECK(om.erase(eins) == 1);
            CHECK(om.size() == 2);
            CHECK(om.erase(vier) == 0);
            CHECK(om.size() == 2);

            auto it = om.begin();
            CHECK(it->first == "zwei");
            ++it;
            CHECK(it->first == "drei");
            ++it;
            CHECK(it == om.end());
        }

        SECTION("with string literal")
        {
            CHECK(om.size() == 3);
            CHECK(om.erase("eins") == 1);
            CHECK(om.size() == 2);
            CHECK(om.erase("vier") == 0);
            CHECK(om.size() == 2);

            auto it = om.begin();
            CHECK(it->first == "zwei");
            ++it;
            CHECK(it->first == "drei");
            ++it;
            CHECK(it == om.end());
        }

        SECTION("with iterator")
        {
            CHECK(om.size() == 3);
            CHECK(om.begin()->first == "eins");
            CHECK(std::next(om.begin(), 1)->first == "zwei");
            CHECK(std::next(om.begin(), 2)->first == "drei");

            auto it = om.erase(om.begin());
            CHECK(it->first == "zwei");
            CHECK(om.size() == 2);

            auto it2 = om.begin();
            CHECK(it2->first == "zwei");
            ++it2;
            CHECK(it2->first == "drei");
            ++it2;
            CHECK(it2 == om.end());
        }
    }

    SECTION("count")
    {
        ordered_map<std::string, std::string> om;
        om["eins"] = "one";
        om["zwei"] = "two";
        om["drei"] = "three";

        const std::string eins("eins");
        const std::string vier("vier");
        CHECK(om.count("eins") == 1);
        CHECK(om.count(std::string("eins")) == 1);
        CHECK(om.count(eins) == 1);
        CHECK(om.count("vier") == 0);
        CHECK(om.count(std::string("vier")) == 0);
        CHECK(om.count(vier) == 0);
    }

    SECTION("find")
    {
        ordered_map<std::string, std::string> om;
        om["eins"] = "one";
        om["zwei"] = "two";
        om["drei"] = "three";
        const auto com = om;

        const std::string eins("eins");
        const std::string vier("vier");
        CHECK(om.find("eins") == om.begin());
        CHECK(om.find(std::string("eins")) == om.begin());
        CHECK(om.find(eins) == om.begin());
        CHECK(om.find("vier") == om.end());
        CHECK(om.find(std::string("vier")) == om.end());
        CHECK(om.find(vier) == om.end());

        CHECK(com.find("eins") == com.begin());
        CHECK(com.find(std::string("eins")) == com.begin());
        CHECK(com.find(eins) == com.begin());
        CHECK(com.find("vier") == com.end());
        CHECK(com.find(std::string("vier")) == com.end());
        CHECK(com.find(vier) == com.end());
    }

    SECTION("insert")
    {
        ordered_map<std::string, std::string> om;
        om["eins"] = "one";
        om["zwei"] = "two";
        om["drei"] = "three";

        SECTION("const value_type&")
        {
            ordered_map<std::string, std::string>::value_type vt1 {"eins", "1"};
            ordered_map<std::string, std::string>::value_type vt4 {"vier", "four"};

            auto res1 = om.insert(vt1);
            CHECK(res1.first == om.begin());
            CHECK(res1.second == false);
            CHECK(om.size() == 3);

            auto res4 = om.insert(vt4);
            CHECK(res4.first == om.begin() + 3);
            CHECK(res4.second == true);
            CHECK(om.size() == 4);
        }

        SECTION("value_type&&")
        {
            auto res1 = om.insert({"eins", "1"});
            CHECK(res1.first == om.begin());
            CHECK(res1.second == false);
            CHECK(om.size() == 3);

            auto res4 = om.insert({"vier", "four"});
            CHECK(res4.first == om.begin() + 3);
            CHECK(res4.second == true);
            CHECK(om.size() == 4);
        }
    }
}