Question

我目前正在进行TestFirst.org的Ruby练习。它是一个通过使您构建代码来传递测试来教授Ruby的程序。我提到这个说我没有写这个RSpec代码，但是很想知道如何修复它。

RSpec的：

# Book Titles in English obey some strange capitalization rules. For example,
# "and" is lowercase in "War and Peace". This test attempts to make sense of 
# some of those rules.

require 'book'

describe "Book" do
  before do
    @book = Book.new
  end

  describe 'title' do
    it 'should capitalize the first letter' do
      @book.title = "inferno"
      @book.title.should == "Inferno"
    end

    it 'should capitalize every word' do
      @book.title = "stuart little"
      @book.title.should == "Stuart Little"
    end

    describe 'should capitalize every word except...' do
      describe 'articles' do
        specify 'the' do
          @book.title = "alexander the great"
          @book.title.should == "Alexander the Great"
        end

        specify 'a' do
          @book.title = "to kill a mockingbird"
          @book.title.should == "To Kill a Mockingbird"
        end

        specify 'an' do
          @book.title = "to eat an apple a day"
          @book.title.should == "To Eat an Apple a Day"
        end
      end

      specify 'conjunctions' do
        @book.title = "war and peace"
        @book.title.should == "War and Peace"
      end

      specify 'prepositions' do
        @book.title = "love in the time of cholera"
        @book.title.should == "Love in the Time of Cholera"
      end
    end

    describe 'should always capitalize...' do
      specify 'I' do
        @book.title = "what i wish i knew when i was 20"
        @book.title.should == "What I Wish I Knew When I Was 20"
      end

      specify 'the first word' do
        @book.title = "the man in the iron mask"
        @book.title.should == "The Man in the Iron Mask"
      end
    end
  end
end

在它分析我为其编写的代码进行测试之前，它会给出这个错误：

C:\Users\Computer\Documents\learn_ruby\08_book_titles>rake
(in C:/Users/Computer/Documents/learn_ruby)
You must use ANSICON 1.31 or later (http://adoxa.3eeweb.com/ansicon/) to use colour on Windows

Book
  title
    should capitalize the first letter (FAILED - 1)

Failures:

  1) Book title should capitalize the first letter
     Failure/Error: @book = Book.new
     NameError:
       uninitialized constant Book
     # ./08_book_titles/book_titles_spec.rb:20:in `block (2 levels) in <top (required)>'

Finished in 0 seconds
1 example, 1 failure

Failed examples:

rspec ./08_book_titles/book_titles_spec.rb:24 # Book title should capitalize the first letter
C:/RailsInstaller/Ruby2.1.0/bin/ruby.exe -S rspec C:/Users/Computer/Documents/learn_ruby/08_book_titles/book_titles_spec
.rb -IC:/Users/Computer/Documents/learn_ruby/08_book_titles -IC:/Users/Computer/Documents/learn_ruby/08_book_titles/solu
tion -f documentation -r ./rspec_config failed

我已尝试使用Google搜索错误消息，但没有运气。我刚刚开始学习，而且我没有专业知识来解决这个RSpec代码问题。对于这名有需要的学生，我们将非常感谢您的帮助。

编辑：

我是一个白痴，并不了解被问到我的是什么。继续吧。

Answer 1

您需要创建一个名为Book的新类。

您可以在名为book.rb的同一目录中创建新文件，或在测试套件的顶部添加以下行。

class Book
end

Answer 2

您应该已经包含了book.rb文件。您正在寻找的解决方案是：

正如您在book_titles_spec.rb中看到的那样，有一行代码：

@book = Book.new 所以这意味着你需要创建一个名为Book
的类课程书端
然后在第一个测试中，它调用没有参数的方法标题，所以这意味着您需要创建一个名为 title 的attr_accessor，这样您就可以将它用作实例变量。在标题方法中使用

attr_accessor：title
现在只是传递测试的逻辑，所以你可以创建一个title方法并使用@title变量来做魔术

def title @ title.split（''）＃所有通过测试的逻辑 @你的答案端

我认为这对Ruby中的初学者来说是一个艰难的考验，所以这个答案可以帮助他们开始解决这个问题。

RSpec未能参加学生练习

2 个答案: