add unit-inplace_array.cpp

tests/src/unit-inplace_array.cpp

@@ -0,0 +1,79 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.11.2
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
+#include "doctest_compatibility.h"
+
+#include <array>
+#include <string>
+#include <iostream>
+
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+using ordered_json = nlohmann::ordered_json;
+
+
+class Person
+{
+  public:
+    //Person(){ std::cout<<"Person constructor\n";}
+    int age;
+    std::string name;
+    NLOHMANN_DEFINE_TYPE_INTRUSIVE(Person, name, age);
+
+    int count{1};   // the data must not be reset
+};
+
+class SchoolA
+{
+  public:
+    //SchoolA(){ std::cout<<"School constructor\n";}
+    std::array<Person, 2> persons;
+
+    NLOHMANN_DEFINE_TYPE_INTRUSIVE(SchoolA, persons);
+};
+class SchoolB
+{
+  public:
+    //SchoolB(){ std::cout<<"School constructor\n";}
+
+    Person persons[2];
+
+    NLOHMANN_DEFINE_TYPE_INTRUSIVE(SchoolB, persons);
+};
+
+
+TEST_CASE("inplace_array<nlohmann::json>")
+{
+
+    json obj = R"({"persons":[{"age":100, "name":"alex"}, {"age":200, "name":"edmond"}]})"_json;
+
+    {
+        SchoolA   s;
+        from_json(obj, s);
+        CHECK(s.persons[0].age == 100);
+
+        s.persons[0].count = 88;
+
+        from_json(obj, s);
+        CHECK(s.persons[0].count == 88);
+    }
+
+    {
+        SchoolB   s;
+        from_json(obj, s);
+
+        CHECK(s.persons[0].age == 100);
+
+        s.persons[0].count = 88;
+
+        from_json(obj, s);
+        CHECK(s.persons[0].count == 88);
+    }
+
+}