// __ _____ _____ _____ // __| | __| | | | JSON for Modern C++ (supporting code) // | | |__ | | | | | | version 3.12.0 // |_____|_____|_____|_|___| https://github.com/nlohmann/json // // SPDX-FileCopyrightText: 2013-2026 Niels Lohmann // SPDX-License-Identifier: MIT #include "doctest_compatibility.h" #define JSON_DIAGNOSTICS 1 #define JSON_DIAGNOSTIC_POSITIONS 1 #include using json = nlohmann::json; TEST_CASE("Better diagnostics with positions") { SECTION("invalid type") { const std::string json_invalid_string = R"( { "address": { "street": "Fake Street", "housenumber": "1" } } )"; json j = json::parse(json_invalid_string); CHECK_THROWS_WITH_AS(j.at("address").at("housenumber").get(), "[json.exception.type_error.302] (/address/housenumber) (bytes 108-111) type must be number, but is string", json::type_error); } SECTION("invalid type without positions") { const json j = "foo"; CHECK_THROWS_WITH_AS(j.get(), "[json.exception.type_error.302] type must be number, but is string", json::type_error); } SECTION("JSON patch add to primitive parent (#4292)") { // the JSON Patch "add" target /foo/bar/baz has a string parent // (/foo/bar); the position of that parent is reported in the message const json doc = json::parse(R"({"foo":{"bar":"a string"}})"); const json patch = json::parse(R"([{"op":"add","path":"/foo/bar/baz","value":1}])"); CHECK_THROWS_WITH_AS(doc.patch(patch), "[json.exception.out_of_range.411] (/foo/bar) (bytes 14-24) cannot add value: the JSON Patch 'add' target's parent is of type string, but must be an object or array", json::out_of_range); } }