rspec测试是否调用了方法

Harry B. 发表于 Dev

哈里·B。

我无法弄清楚如何编写可以运行的测试，该测试也不会在CL的脚本中运行任何内容。当@counter为9时，应该触发#tie_game？但它不起作用。@counter初始化为0，并且每当玩家在游戏板上放一个X或O时，它都会加1。我该如何测试@counter为9时调用tie_game的情况？并且当它小于9时不会吗？

def initialize(player1, player2)
    @player1 = player1
    @player2 = player2
    @rows = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

    @wins = [1, 2, 3], [4, 5, 6], [7, 8, 9], 
        [1, 4, 7], [2, 5, 8], [3, 6, 9],
        [1, 5, 9], [3, 5, 7]

    @selected_numbers = []
    @counter = 0
end

def increment_counter
    @counter += 1

    if @counter == 9
        tie_game?
    end
end

def tie_game?
    puts "The game was a tie. Nicely played #{@player1} & #{@player2}!"
    play_again  
end

我尝试过：您能解释一下为什么它不起作用吗？

describe "increment_counter" do
    context "counter equals 9" do
        it "calls tie_game?" do
            game.instance_variable_set(:@counter, 9)
            allow(game).to receive(:increment_counter)
            #expect(STDOUT).to receive(:puts).with("The game was a tie. Nicely played #{@player1} & #{@player2}!")
            expect(game).to receive(:tie_game?)
        end
    end
    context "counter is less than 9" do
        it "does not call tie_game?" do
            game.instance_variable_set(:@counter, 4)
            game.increment_counter
            expect(game).not_to receive(:tie_game?)  
        end
    end
end

贾森

RSpec Mocks为您做到这一点。

describe TicTacToe do
  let(:game) { TicTacToe.new }

  context "after fewer than 9 moves" do
    it "does not call tie_game?" do
      expect(game).not_to receive(:tie_game?)
      8.times { game.increment_counter }
    end
  end

  context "after 9 moves" do
    it "calls tie_game?" do
      expect(game).to receive(:tie_game?)
      9.times { game.increment_counter }
    end
  end
end