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475 lines
13 KiB
C++
475 lines
13 KiB
C++
// __ _____ _____ _____
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// __| | __| | | | JSON for Modern C++ (supporting code)
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// | | |__ | | | | | | version 3.11.3
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// |_____|_____|_____|_|___| https://github.com/nlohmann/json
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//
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// SPDX-FileCopyrightText: 2013-2023 Niels Lohmann <https://nlohmann.me>
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// SPDX-License-Identifier: MIT
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#include <string>
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#include <vector>
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#include "doctest_compatibility.h"
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#include <nlohmann/json.hpp>
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using nlohmann::json;
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namespace persons
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{
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class person_with_private_data
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{
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private:
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std::string name{};
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int age = 0;
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json metadata = nullptr;
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public:
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bool operator==(const person_with_private_data& rhs) const
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{
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return name == rhs.name && age == rhs.age && metadata == rhs.metadata;
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}
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person_with_private_data() = default;
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person_with_private_data(std::string name_, int age_, json metadata_)
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: name(std::move(name_))
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, age(age_)
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, metadata(std::move(metadata_))
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{}
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NLOHMANN_DEFINE_TYPE_INTRUSIVE(person_with_private_data, age, name, metadata)
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};
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class person_with_private_data_2
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{
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private:
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std::string name{};
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int age = 0;
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json metadata = nullptr;
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public:
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bool operator==(const person_with_private_data_2& rhs) const
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{
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return name == rhs.name && age == rhs.age && metadata == rhs.metadata;
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}
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person_with_private_data_2() = default;
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person_with_private_data_2(std::string name_, int age_, json metadata_)
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: name(std::move(name_))
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, age(age_)
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, metadata(std::move(metadata_))
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{}
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std::string getName() const
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{
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return name;
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}
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int getAge() const
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{
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return age;
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}
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json getMetadata() const
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{
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return metadata;
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}
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NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT(person_with_private_data_2, age, name, metadata)
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};
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class person_without_private_data_1
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{
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public:
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std::string name{};
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int age = 0;
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json metadata = nullptr;
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bool operator==(const person_without_private_data_1& rhs) const
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{
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return name == rhs.name && age == rhs.age && metadata == rhs.metadata;
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}
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person_without_private_data_1() = default;
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person_without_private_data_1(std::string name_, int age_, json metadata_)
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: name(std::move(name_))
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, age(age_)
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, metadata(std::move(metadata_))
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{}
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NLOHMANN_DEFINE_TYPE_INTRUSIVE(person_without_private_data_1, age, name, metadata)
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};
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class person_without_private_data_2
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{
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public:
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std::string name{};
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int age = 0;
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json metadata = nullptr;
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bool operator==(const person_without_private_data_2& rhs) const
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{
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return name == rhs.name && age == rhs.age && metadata == rhs.metadata;
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}
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person_without_private_data_2() = default;
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person_without_private_data_2(std::string name_, int age_, json metadata_)
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: name(std::move(name_))
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, age(age_)
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, metadata(std::move(metadata_))
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{}
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};
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NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(person_without_private_data_2, age, name, metadata)
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class person_without_private_data_3
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{
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public:
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std::string name{};
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int age = 0;
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json metadata = nullptr;
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bool operator==(const person_without_private_data_3& rhs) const
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{
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return name == rhs.name && age == rhs.age && metadata == rhs.metadata;
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}
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person_without_private_data_3() = default;
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person_without_private_data_3(std::string name_, int age_, json metadata_)
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: name(std::move(name_))
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, age(age_)
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, metadata(std::move(metadata_))
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{}
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std::string getName() const
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{
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return name;
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}
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int getAge() const
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{
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return age;
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}
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json getMetadata() const
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{
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return metadata;
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}
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};
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NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT(person_without_private_data_3, age, name, metadata)
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class person_with_private_alphabet
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{
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public:
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bool operator==(const person_with_private_alphabet& other) const
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{
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return a == other.a &&
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b == other.b &&
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c == other.c &&
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d == other.d &&
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e == other.e &&
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f == other.f &&
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g == other.g &&
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h == other.h &&
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i == other.i &&
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j == other.j &&
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k == other.k &&
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l == other.l &&
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m == other.m &&
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n == other.n &&
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o == other.o &&
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p == other.p &&
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q == other.q &&
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r == other.r &&
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s == other.s &&
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t == other.t &&
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u == other.u &&
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v == other.v &&
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w == other.w &&
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x == other.x &&
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y == other.y &&
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z == other.z;
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}
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private:
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int a = 0;
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int b = 0;
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int c = 0;
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int d = 0;
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int e = 0;
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int f = 0;
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int g = 0;
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int h = 0;
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int i = 0;
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int j = 0;
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int k = 0;
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int l = 0;
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int m = 0;
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int n = 0;
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int o = 0;
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int p = 0;
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int q = 0;
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int r = 0;
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int s = 0;
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int t = 0;
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int u = 0;
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int v = 0;
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int w = 0;
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int x = 0;
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int y = 0;
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int z = 0;
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NLOHMANN_DEFINE_TYPE_INTRUSIVE(person_with_private_alphabet, a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z)
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};
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class person_with_public_alphabet
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{
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public:
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bool operator==(const person_with_public_alphabet& other) const
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{
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return a == other.a &&
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b == other.b &&
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c == other.c &&
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d == other.d &&
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e == other.e &&
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f == other.f &&
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g == other.g &&
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h == other.h &&
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i == other.i &&
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j == other.j &&
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k == other.k &&
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l == other.l &&
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m == other.m &&
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n == other.n &&
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o == other.o &&
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p == other.p &&
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q == other.q &&
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r == other.r &&
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s == other.s &&
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t == other.t &&
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u == other.u &&
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v == other.v &&
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w == other.w &&
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x == other.x &&
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y == other.y &&
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z == other.z;
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}
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int a = 0;
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int b = 0;
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int c = 0;
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int d = 0;
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int e = 0;
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int f = 0;
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int g = 0;
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int h = 0;
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int i = 0;
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int j = 0;
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int k = 0;
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int l = 0;
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int m = 0;
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int n = 0;
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int o = 0;
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int p = 0;
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int q = 0;
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int r = 0;
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int s = 0;
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int t = 0;
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int u = 0;
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int v = 0;
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int w = 0;
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int x = 0;
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int y = 0;
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int z = 0;
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};
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NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(person_with_public_alphabet, a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z)
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class person_without_default_constructor_1
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{
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public:
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std::string name;
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int age;
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bool operator==(const person_without_default_constructor_1& other) const
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{
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return name == other.name && age == other.age;
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}
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person_without_default_constructor_1(std::string name_, int age_)
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: name{std::move(name_)}
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, age{age_}
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{}
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NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE(person_without_default_constructor_1, name, age)
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};
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class person_without_default_constructor_2
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{
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public:
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std::string name;
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int age;
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bool operator==(const person_without_default_constructor_2& other) const
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{
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return name == other.name && age == other.age;
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}
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person_without_default_constructor_2(std::string name_, int age_)
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: name{std::move(name_)}
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, age{age_}
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{}
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};
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NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE(person_without_default_constructor_2, name, age)
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} // namespace persons
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TEST_CASE_TEMPLATE("Serialization/deserialization via NLOHMANN_DEFINE_TYPE_INTRUSIVE and NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE", T,
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persons::person_with_private_data,
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persons::person_without_private_data_1,
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persons::person_without_private_data_2)
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{
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SECTION("person")
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{
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// serialization
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T p1("Erik", 1, {{"haircuts", 2}});
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CHECK(json(p1).dump() == "{\"age\":1,\"metadata\":{\"haircuts\":2},\"name\":\"Erik\"}");
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// deserialization
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auto p2 = json(p1).get<T>();
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CHECK(p2 == p1);
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// roundtrip
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CHECK(T(json(p1)) == p1);
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CHECK(json(T(json(p1))) == json(p1));
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// check exception in case of missing field
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json j = json(p1);
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j.erase("age");
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CHECK_THROWS_WITH_AS(j.get<T>(), "[json.exception.out_of_range.403] key 'age' not found", json::out_of_range);
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}
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}
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TEST_CASE_TEMPLATE("Serialization/deserialization via NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT and NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT", T,
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persons::person_with_private_data_2,
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persons::person_without_private_data_3)
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{
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SECTION("person with default values")
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{
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// serialization of default constructed object
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T p0;
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CHECK(json(p0).dump() == "{\"age\":0,\"metadata\":null,\"name\":\"\"}");
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// serialization
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T p1("Erik", 1, {{"haircuts", 2}});
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CHECK(json(p1).dump() == "{\"age\":1,\"metadata\":{\"haircuts\":2},\"name\":\"Erik\"}");
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// deserialization
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auto p2 = json(p1).get<T>();
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CHECK(p2 == p1);
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// roundtrip
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CHECK(T(json(p1)) == p1);
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CHECK(json(T(json(p1))) == json(p1));
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// check default value in case of missing field
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json j = json(p1);
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j.erase("name");
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j.erase("age");
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j.erase("metadata");
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T p3 = j.get<T>();
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CHECK(p3.getName() == "");
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CHECK(p3.getAge() == 0);
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CHECK(p3.getMetadata() == nullptr);
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}
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}
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TEST_CASE_TEMPLATE("Serialization/deserialization of classes with 26 public/private member variables via NLOHMANN_DEFINE_TYPE_INTRUSIVE and NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE", T,
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persons::person_with_private_alphabet,
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persons::person_with_public_alphabet)
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{
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SECTION("alphabet")
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{
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{
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T obj1;
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nlohmann::json const j = obj1; //via json object
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T obj2;
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j.get_to(obj2);
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bool ok = (obj1 == obj2);
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CHECK(ok);
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}
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{
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T obj1;
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nlohmann::json const j1 = obj1; //via json string
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std::string const s = j1.dump();
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nlohmann::json const j2 = nlohmann::json::parse(s);
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T obj2;
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j2.get_to(obj2);
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bool ok = (obj1 == obj2);
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CHECK(ok);
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}
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{
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T obj1;
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nlohmann::json const j1 = obj1; //via msgpack
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std::vector<uint8_t> const buf = nlohmann::json::to_msgpack(j1);
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nlohmann::json const j2 = nlohmann::json::from_msgpack(buf);
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T obj2;
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j2.get_to(obj2);
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bool ok = (obj1 == obj2);
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CHECK(ok);
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}
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{
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T obj1;
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nlohmann::json const j1 = obj1; //via bson
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std::vector<uint8_t> const buf = nlohmann::json::to_bson(j1);
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nlohmann::json const j2 = nlohmann::json::from_bson(buf);
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T obj2;
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j2.get_to(obj2);
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bool ok = (obj1 == obj2);
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CHECK(ok);
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}
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{
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T obj1;
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nlohmann::json const j1 = obj1; //via cbor
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std::vector<uint8_t> const buf = nlohmann::json::to_cbor(j1);
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nlohmann::json const j2 = nlohmann::json::from_cbor(buf);
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T obj2;
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j2.get_to(obj2);
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bool ok = (obj1 == obj2);
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CHECK(ok);
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}
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{
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T obj1;
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nlohmann::json const j1 = obj1; //via ubjson
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std::vector<uint8_t> const buf = nlohmann::json::to_ubjson(j1);
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nlohmann::json const j2 = nlohmann::json::from_ubjson(buf);
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T obj2;
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j2.get_to(obj2);
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bool ok = (obj1 == obj2);
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CHECK(ok);
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}
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}
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}
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TEST_CASE_TEMPLATE("Serialization of non-default-constructible classes via NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE and NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE", T,
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persons::person_without_default_constructor_1,
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persons::person_without_default_constructor_2)
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{
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SECTION("person")
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{
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{
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// serialization of a single object
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T person{"Erik", 1};
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CHECK(json(person).dump() == "{\"age\":1,\"name\":\"Erik\"}");
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// serialization of a container with objects
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std::vector<T> const two_persons
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{
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{"Erik", 1},
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{"Kyle", 2}
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};
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CHECK(json(two_persons).dump() == "[{\"age\":1,\"name\":\"Erik\"},{\"age\":2,\"name\":\"Kyle\"}]");
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}
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}
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}
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