desc: Regression tests for issue #370, calling `map` after `db_list` or `table_list`
tests:

    # Set up a stream
    - cd: r.db('test').table_create('t370')
      def: d = r.db('test')

    # Map after db_list
    - cd: r.db_list().map(r.row)
      rb: r.db_list.map{|row| row}
      ot: (['test'])

    # Map after table_list
    - cd: d.table_list().map(r.row)
      rb: d.table_list.map{|row| row}
      ot: (['t370'])

    # clean up
    - cd: r.db('test').table_drop('t370')
