issue-229-oneof-default-values.cpp

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#include <iostream>
#include <nlohmann/json-schema.hpp>
 
using nlohmann::json;
using nlohmann::json_uri;
using nlohmann::json_schema::json_validator;
 
static const json default_schema = R"(
{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "type": "object",
    "oneOf": [
        {
            "type": "object",
            "properties": {
                "name": {
                    "enum": "foo"
                },
                "code": {
                    "const": 1,
                    "default": 1
                }
            }
        },
        {
            "type": "object",
            "properties": {
                "name": {
                    "enum": "bar"
                },
                "code": {
                    "const": 2,
                    "default": 2
                }
            }
        }
    ]
})"_json;
 
static void loader(const json_uri &uri, json &schema)
{
    schema = default_schema;
}
 
int main(void)
{
    json_validator validator(loader);
 
    validator.set_root_schema(default_schema);
 
    json data = R"({"name": "bar"})"_json;
    json expected = R"(
        [
            {
                "op": "add",
                "path": "/code",
                "value": 2
            }
        ]
    )"_json;
 
    json patch = validator.validate(data);
    if (patch != expected) {
        std::cerr << "Patch contains wrong operation: '" << patch.dump() << "' instead of expected '" << expected.dump() << "'" << std::endl;
        return 1;
    }
 
    return 0;
}