Function LoadCases

test/CommandLineConvertTest.cpp:307–345

using CasesByConfig = std::unordered_map<std::string, std::vector<CaseInput>>;

CasesByConfig LoadCases(const std::string& jsonPath) {
  CasesByConfig cases;
  std::string content;
  {
    std::ifstream ifs(jsonPath);
    if (!ifs.is_open()) {
      throw std::runtime_error("Cannot open " + jsonPath);
    }
    std::stringstream buffer;
    buffer << ifs.rdbuf();
    content = buffer.str();
  }

  rapidjson::Document doc;
  doc.Parse<rapidjson::kParseCommentsFlag |
            rapidjson::kParseTrailingCommasFlag>(content.c_str());
  if (doc.HasParseError() || !doc.IsObject() || !doc.HasMember("cases") ||
      !doc["cases"].IsArray()) {
    throw std::runtime_error("Invalid testcases.json format");
  }

  for (auto& entry : doc["cases"].GetArray()) {
    if (!entry.IsObject() || !entry.HasMember("input") ||
        !entry["input"].IsString() || !entry.HasMember("expected") ||
        !entry["expected"].IsObject()) {
      continue;
    }
    const std::string input = entry["input"].GetString();
    for (auto itr = entry["expected"].MemberBegin();
         itr != entry["expected"].MemberEnd(); ++itr) {
      if (!itr->value.IsString()) {
        continue;
      }
      const std::string config = itr->name.GetString();
      cases[config].push_back({input, itr->value.GetString()});
    }
  }
  return cases;
}

TEST_F(CommandLineConvertTest, ConvertFromJson) {
#ifdef BAZEL