class ChefCLI::Policyfile::CookbookLock

def assert_required_keys_valid!(lock_data)
  missing_keys = REQUIRED_LOCK_DATA_KEYS.reject { |key| lock_data.key?(key) }
  unless missing_keys.empty?
    raise InvalidLockfile, "Lockfile cookbook_lock for #{name} missing required attributes `#{missing_keys.join("', `")}'"
  end
  version = lock_data["version"]
  unless version.is_a?(String)
    raise InvalidLockfile, "Lockfile cookbook_lock for #{name} `version' attribute must be a string (got: #{version})"
  end
  identifier = lock_data["identifier"]
  unless identifier.is_a?(String)
    raise InvalidLockfile, "Lockfile cookbook_lock for #{name} `identifier' attribute must be a string (got: #{identifier})"
  end
  cache_key = lock_data["cache_key"]
  unless cache_key.is_a?(String) || cache_key.nil?
    raise InvalidLockfile, "Lockfile cookbook_lock for #{name} `cache_key' attribute must be a string (got: #{cache_key})"
  end
  source_options = lock_data["source_options"]
  unless source_options.is_a?(Hash)
    raise InvalidLockfile, "Lockfile cookbook_lock for #{name} `source_options' attribute must be a Hash (JSON object) (got: #{source_options})"
  end
end