verify.cpp

#include <cstdio>
#include <iostream>
#include <json/reader.h>
#include <json/value.h>
#include <string>

namespace validate {

bool isEqualItem(const std::string &s1, const std::string &s2,
                 const std::string &keysJson) {
  Json::Value v1, v2, keysValue;
  struct Spec {
    const std::string &s;
    Json::Value &v;
  };
  const Spec specs[] = {{s1, v1}, {s2, v2}, {keysJson, keysValue}};
  for (const auto &spec : specs) {
    JSONCPP_STRING errs;
    std::unique_ptr<Json::CharReader> reader(
        Json::CharReaderBuilder().newCharReader());
    bool ok = reader->parse(spec.s.data(),
                            spec.s.data() + spec.s.size(),
                            &spec.v, &errs);
    if (!ok) {
      std::cerr << "parse error in: \"" << spec.s << "\": " << errs << std::endl;
      return false;
    }
  };

  for (const std::string &member : keysValue.getMemberNames()) {
    // showing error in order!=root2.end error is cannot compare structures
    const Json::Value &m1 = v1[member];
    const Json::Value &m2 = v2[member];
    if (m1 != m2) {
      std::cerr << "mismatched member " << member << std::endl;
      return false;
    }
  }
  return true;
}

} // namespace validate

int main() {
  struct {
    int line;
    std::string a;
    std::string b;
    std::string keys;
    bool expected;
  } const testCases[] = {
      {__LINE__,
       R"({"id": 1, "name": "test", "randomNo": 1})",
       R"({"id": 1, "name": "test", "randomNo": 1})",
       R"({"id": null, "name": null, "randomNo": null})", true},
      {__LINE__,
       R"({"id": 1, "name": "test", "randomNo": 1})",
       R"({"id": 1, "name": "test", "randomNo": 2})",
       R"({"id": null, "name": null, "randomNo": null})", false},
      {__LINE__,
       R"({"id": 1, "name": "test", "randomNo": 1})",
       R"({"id": 1, "name": "test", "randomNo": 3})",
       R"({"id": null, "name": null})", true}};
  for (const auto &tc : testCases) {
    bool r = validate::isEqualItem(tc.a, tc.b, tc.keys);
    if (r != tc.expected) {
      fprintf(stderr, "assertion failed for line %d\n", tc.line);
      return 1;
    }
  }
  return 0;
}