Ruby 203(about_classes)- rake失败

Question

当我填充预期的输出并调用rake时，我会遇到这个问题。我的设置或代码有问题吗？

约瑟夫斯-MacBook:koans jj$ rake /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby path_to_enlightenment.rb AboutClasses#test_inside_a_method_self_refers_to_the_containing_object已经损坏了你的业力。 子曰:尚未觉悟。我感觉到挫折感。不要害怕寻求帮助。 你想要的答案..。预期的“填写我”等于 请仔细考虑下列守则： /Users/jj/Downloads/koans/about_classes.rb:162:in `test_inside_a_method_self_refers_to_the_containing_object‘ 请记住，沉默有时是最好的回答你的道路到目前为止，...................................X______________ 203/282

有关守则是：

class Dog7
    attr_reader :name

    def initialize(initial_name)
      @name = initial_name
    end

    def get_self
      self
    end

    def to_s
      @name
    end

    def inspect
      "<Dog named '#{name}'>"
    end
  end

  def test_inside_a_method_self_refers_to_the_containing_object
    fido = Dog7.new("Fido")

    fidos_self = fido.get_self
    assert_equal __, fidos_self
  end

我把填好的assest_equal

def test_inside_a_method_self_refers_to_the_containing_object
        fido = Dog7.new("Fido")

        fidos_self = fido.get_self
        assert_equal <Dog named 'Fido'>, fidos_self
      end

它会爆炸。

/Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in require': /Users/jtacuyan/Downloads/koans/about_classes.rb:162: syntax error, unexpected tIDENTIFIER, expecting keyword_do or '{' or '(' (SyntaxError) assert_equal <Dog named 'Fido'>, fidos_self ^ /Users/jj/Downloads/koans/about_classes.rb:162: syntax error, unexpected ',' assert_equal <Dog named 'Fido'>, fidos_self ^ from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in在任务中要求“from path_to_enlightenment.rb:28:in <main>' rake aborted! Command failed with status (1): [/System/Library/Frameworks/Ruby.framework/...] /Users/jj/Downloads/koans/Rakefile:10:inblock : TOP =>默认=>测试”(参见使用-- trace运行任务的完整跟踪)

不过，我可以在irb上好好执行。

irb(main):016:0> fido = Dog7.new("Fido")
=> <Dog named 'Fido'>
irb(main):017:0> fido
=> <Dog named 'Fido'>
irb(main):018:0> fido.name
=> "Fido"
irb(main):019:0> fido.get_self
=> <Dog named 'Fido'>
irb(main):020:0> fidos_self = fido.get_self
=> <Dog named 'Fido'>
irb(main):021:0> fidos_self
=> <Dog named 'Fido'>

Answer 1

您忘记了断言代码中的“。

assert_equal "<Dog named 'Fido'>", fidos_self

更新

您应该断言fidos_self引用了自身，即实例化的Dog7：fido。

assert_equal fido, fidos_self

这正是这个测试应该做的。

Answer 2

错误是类型对象错误；第一个元素是字符串类型，第二个是Dog7类型。解决方案是适当地匹配类型。

检查下列各项的返回值：

fidos_self.is_a?(String)
fidos_self.is_a?(Dog7)
fidos.is_a?(Dog7)
fidos_self
fidos