從水豚特徵測試中消除隨機性

Question

我正在使用Sinatra和rspec-capybara進行測試來製作一個簡單的Rock，paper，scissors遊戲。遊戲對抗計算機對手，隨機選擇岩石，紙張或剪刀。我正在爲網頁結果編寫一個測試。我磕碰對手的反應始終選擇紙讓玩家失去了（因爲他選擇的岩石）

scenario "Player chooses rock, and the computer chooses paper." do 
single_player_sign_in_and_play 
click_button('rock') 
allow(game).to receive_message_chain(:player2, :weapon) {:paper} 
allow(game).to receive(:outcome).and_return("You lose!") 
allow(game).to receive(:message).and_return("Your opponent chose #{game.player2.weapon}. #{game.outcome}") 
expect(page).to have_content("Your opponent chose paper. You lose!") 

末

我想對手總是有：紙作爲武器使玩家失去：該頁面應該有內容：「你的對手選擇了紙，你輸了！」

Answer 1

你應該叫click_button('rock')

scenario "Player chooses rock, and the computer chooses paper." do 
    allow(game).to receive_message_chain(:player2, :weapon) {:paper} 
    allow(game).to receive(:outcome).and_return("You lose!") 
    allow(game).to receive(:message).and_return("Your opponent chose paper. You lose!") 
    single_player_sign_in_and_play 
    click_button('rock') 
    expect(page).to have_content(game.message) 
end 

我會建議在預期不使用game.message和使用Your opponent chose paper. You lose!，而不是之前存根調用。你也可以考慮移動樁到before塊

Answer 2

雙打不能通過水豚功能測試。雙打只能在單元測試中使用！以下代碼通過。

scenario "Player chooses rock, and the computer chooses paper." do 
allow_any_instance_of(Opponent).to receive(:weapon).and_return(:paper) 
single_player_sign_in_and_play 
click_button('rock') 
save_and_open_page 
expect(page).to have_content("Your opponent chose paper. You lose!") 

末