class RSpec::Core::Formatters::BaseFormatter

def close(_notification)
  restore_sync_output
end

def example_group_started(notification)
  @example_group = notification.group
end

def initialize(output)
  @output = output || StringIO.new
  @example_group = nil
end

def output_supports_sync
  output.respond_to?(:sync=)
end

def restore_sync_output
  output.sync = @old_sync if output_supports_sync && !output.closed?
end

def start(notification)
  start_sync_output
  @example_count = notification.count
end

def start_sync_output
  @old_sync, output.sync = output.sync, true if output_supports_sync
end