針對Ruby腳本的Rspec測試問題，需要用戶輸入散列元素

Question

我有一個ruby script，它在運行時從用戶處獲取書籍的價格。我很少爲Ruby腳本編寫RSpec測試。我使用的是Ruby 1.9.3-p327和rspec 2.11.0。你可以克隆我的項目從Githubthis link。

我的Rspec測試旨在測試新實例化的對象是否屬於特定的類。

如果我在ruby script中註釋行號32，我的測試成功通過。

不知何故，當我取消註釋該行，我得到下面的錯誤是用戶輸入。我甚至沒有將其作爲我的spec file的一部分進行測試，但仍然遇到了這個錯誤。我不清楚爲什麼以及如何解決這個問題。

The Last Samurai: /home/mohnish/xxx/yyy/sample_pocs/book/book.rb:11:in `gets': Is a directory - spec (Errno::EISDIR) 
    from /home/mohnish/xxx/yyy/sample_pocs/book/book.rb:11:in `gets' 
    from /home/mohnish/xxx/yyy/sample_pocs/book/book.rb:11:in `block in get_prices' 
from /home/mohnish/xxx/yyy/sample_pocs/book/book.rb:9:in `each' 
    from /home/mohnish/xxx/yyy/sample_pocs/book/book.rb:9:in `inject' 
    from /home/mohnish/xxx/yyy/sample_pocs/book/book.rb:9:in `get_prices' 
from /home/mohnish/xxx/yyy/sample_pocs/book/book.rb:49:in `<top (required)>' 
    from /home/mohnish/xxx/yyy/sample_pocs/book/spec/spec_helper.rb:1:in `require_relative' 
    from /home/mohnish/xxx/yyy/sample_pocs/book/spec/spec_helper.rb:1:in `<top (required)>' 
from /home/mohnish/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require' 
    from /home/mohnish/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require' 
    from /home/mohnish/xxx/yyy/sample_pocs/book/spec/book_spec.rb:1:in `<top (required)>' 
from /home/mohnish/.rvm/gems/ruby-1.9.3-p327@book_set/gems/rspec-core-2.11.1/lib/rspec/core/configuration.rb:780:in `load' 
    from /home/mohnish/.rvm/gems/ruby-1.9.3-p327@book_set/gems/rspec-core-2.11.1/lib/rspec/core/configuration.rb:780:in `block in load_spec_files' 
    from /home/mohnish/.rvm/gems/ruby-1.9.3-p327@book_set/gems/rspec-core-2.11.1/lib/rspec/core/configuration.rb:780:in `map' 
from /home/mohnish/.rvm/gems/ruby-1.9.3-p327@book_set/gems/rspec-core-2.11.1/lib/rspec/core/configuration.rb:780:in `load_spec_files' 
    from /home/mohnish/.rvm/gems/ruby-1.9.3-p327@book_set/gems/rspec-core-2.11.1/lib/rspec/core/command_line.rb:22:in `run' 
    from /home/mohnish/.rvm/gems/ruby-1.9.3-p327@book_set/gems/rspec-core-2.11.1/lib/rspec/core/runner.rb:69:in `run' 
from /home/mohnish/.rvm/gems/ruby-1.9.3-p327@book_set/gems/rspec-core-2.11.1/lib/rspec/core/runner.rb:8:in `block in autorun' 

我也想測試這個例子的用戶輸入。如果你能夠點亮我怎麼能得到同樣的結果，這將是非常好的。我發現有些地方可以開始測試用戶輸入，如eg 1和eg 2，但我主要是看如何測試用戶輸入的一些屬於散列的元素

謝謝。

Answer 1

使用

STDIN.gets.chomp 

見this answer。

測試此方法的最佳方法是使用返回固定響應的對象和方法來模擬IO#gets。 RSpec模擬看起來是這樣的：

STDIN.should_receive(:gets).and_return("A Book Title") 

查看this answer查看更多示例。將它們設置在適當的before :each區塊中，它們將在您的測試中攔截對gets的呼叫。