module SimpleCov::ResultMerger

def resultset

caching it for subsequent accesses.
Loads the cached resultset from JSON and returns it as a Hash,

def resultset
  @resultset ||= begin
    data = stored_data
    if data
      begin
        JSON.parse(data) || {}
      rescue StandardError
        {}
      end
    else
      {}
    end
  end
end

Instance Methods