RSPEC测试符号返回

Question

好，RSPEC菜单在这里...我有一个简单的方法，我想测试。我只想让测试说...当这种方法称为时，它返回一个符号...任何指针？

方法....

  def defend_corners(board)
    @board = board
    @corners = {
        :a1=>" ", :a3=>" ",
        :c1=>" ", :c3=>" "
    }
    available_moves = @corners.select{ |k, v| v == " " }.keys
    puts "random move - corners"
    @move = available_moves[rand(available_moves.length)]
    return @move
  end

当前测试....

  describe 'defend_corners' do
    it 'returns corner move' do
      myboard = Board.new
      @player_computer.defend_corners(myboard).should #return a symbol???
    end  
  end

Answer 1

@player_computer.defend_corners(myboard).should be_an_instance_of(Symbol)

或

@player_computer.defend_corners(myboard).should be_a_kind_of(Symbol)

或

@player_computer.defend_corners(myboard).should be_a(Symbol)

Answer 2

这不是很漂亮，但我认为这样的事情有效：

@corners.keys.should_be include @player_computer.defend_corners(myboard)

Answer 3

，2.5小时后答案为（鼓滚）.... be_a（符号）