RSpec:使用方法存根测试交互式用户输入 [英] RSpec: Using a method stub to test interactive user input

问题描述

我是 Ruby 和 RSpec 的新手，并且已经花了几个小时尝试编写测试交互式 井字棋程序，但没有找到任何有用的答案来解决我遇到的错误:

I'm new to both Ruby and RSpec, and have already spent hours trying to write the first steps for testing an interactive tic tac toe program, but haven't located any useful answers to the error I'm getting:

> bundle exec rspec --format documentation                                
Do you want to play tic-tac-toe? (y/n)

An error occurred while loading ./spec/tic_tac_toe_spec.rb.
Failure/Error: choice = gets.chomp.downcase

Errno::ENOENT:
  No such file or directory @ rb_sysopen - --format
# ./lib/tic_tac_toe.rb:70:in `gets'
# ./lib/tic_tac_toe.rb:70:in `gets'
# ./lib/tic_tac_toe.rb:70:in `start_game'
# ./lib/tic_tac_toe.rb:144:in `<top (required)>'
# ./spec/tic_tac_toe_spec.rb:1:in `require'
# ./spec/tic_tac_toe_spec.rb:1:in `<top (required)>'
No examples found.

Finished in 0.0004 seconds (files took 0.08415 seconds to load)
0 examples, 0 failures, 1 error occurred outside of examples

当您开始游戏时，它会提示您是否要玩(y/n).我已经尝试过使用模拟和存根的不同变体，但总是得到同样的错误.我想我错过了一些非常基本但看不到的东西.

When you start the game, it prompts whether you want to play (y/n). I've already attempted different variations of using mocking and stubs but always get this same error. I imagine I'm missing something very basic but cannot see it.

问题:如何充分解决(使用 RSpec)游戏的第一个提示?

Question: how would one adequately address (using RSpec) this first prompt of the game?

游戏使用一个独立的方法(start_game)而不是一个类来启动.我正在寻找某种方式使用一些默认输入(如 y 或 n)来模拟或存根，因为我希望测试是自动化的.但是，我看到的所有示例都使用类来启动程序(而不是像这里这样的独立方法).

The game uses an independent method (start_game) but not a class to start. I'm looking for some way mock or stub this with some default input (like y or n) as I want the tests to be automated. All the examples I see use a class to start a program, however (rather than a stand-alone method like here).

目前在 spec/tic_tac_toe_spec.rb 中有一些 let 关键字用于 :output 和 :game我从某个地方的一个例子中发现，但显然这不起作用.

Currently in spec/tic_tac_toe_spec.rb there are some let keywords for :output and :game which I found from an example somewhere but obviously this doesn't work.

编辑 我想测试以下方法.RSpec 代码在 choice = gets.chomp.downcase 行上一直卡住.

Edit I want to test the following method. The RSpec code keeps choking on the choice = gets.chomp.downcase line.

def start_game

  puts "Do you want to play tic-tac-toe? (y/n)"

  choice = gets.chomp.downcase

  unless ["y","n"].include?(choice)
    abort("Please answer with y or n.")
  end

  case choice
  when "y"
    puts "Ok, let's start!"
    b = Board.new
    puts "Enter name of player 1 (O)"
    player1name = gets.chomp
    player1 = Player.new(player1name)
    puts "Now enter name of player 2 (X)"
    player2name = gets.chomp
    player2 = Player.new(player2name)
    play_game(player1, player2, b)
  when "n"
    puts "Your loss."
  end

end #start_game

推荐答案

您收到错误是因为您将 --format 文档 作为参数传递给 RSpec.

You are receiving the error because you are passing the --format documentation as a parameter to RSpec.

gets 读取已传递的 ARGV.这也包括 RSpec 参数.您应该使用 STDIN.gets 以便您只读取标准输入而不是参数.

gets reads the ARGV that have been passed. This also includes the RSpec parameters. You should use STDIN.gets so that you only read standard input and not the parameters.

您可以在此问题中阅读更多相关信息:https://stackoverflow.com/a/19799223/6156030

You can read more about in this question: https://stackoverflow.com/a/19799223/6156030

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