issue-93.cpp

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#include <nlohmann/json-schema.hpp>
 
#include <fstream>
#include <iostream>
 
using nlohmann::json;
using nlohmann::json_uri;
using nlohmann::json_schema::json_validator;
 
static const auto expected_patch = R"(
[{"op":"add","path":"/0/renderable/bg","value":"Black"}]
)"_json;
 
static const auto instance = R"(
[
    {
        "name":"player",
        "renderable": {
            "fg":"White"
        }
    }
]
)"_json;
 
static void loader(const json_uri &uri, json &schema)
{
    std::string filename = "./" + uri.path();
    std::ifstream lf(filename);
    if (!lf.good())
        throw std::invalid_argument("could not open " + uri.url() + " tried with " + filename);
    try {
        lf >> schema;
    } catch (const std::exception &e) {
        throw e;
    }
}
 
int main(void)
{
    json_validator validator(loader);
 
    std::fstream f("blueprints.schema.json");
 
    json schema;
    f >> schema;
 
    validator.set_root_schema(schema);
 
    auto missing_default_patch = validator.validate(instance);
 
    std::cerr << missing_default_patch << "\n";
    std::cerr << expected_patch << "\n";
 
    return missing_default_patch != expected_patch;
}