rubykoan中未定义的方法`as_name

Question

我正在做RubyKoan about_iteration part。但是，我在test_each_is_a_method_on_arrays测试中遇到了一个错误，我不知道如何解决；

undefined method `as_name' for #<AboutIteration:0x00007fcbc6031dc8 @name=:test_each_is_a_method_on_arrays, 
@failure=#<NoMethodError: undefined method `as_name' for #<AboutIteration:0x00007fcbc6031dc8 ...>>, @koan_cou
nt=17, @step_count=158, @koan_file="AboutIteration">

这是代码；

require File.expand_path(File.dirname(__FILE__) + '/neo')

class AboutIteration < Neo::Koan

  # -- An Aside ------------------------------------------------------
  # Ruby 1.8 stores names as strings. Ruby 1.9 stores names as
  # symbols. So we use a version dependent method "as_name" to convert
  # to the right format in the koans.  We will use "as_name" whenever
  # comparing to lists of methods.

  in_ruby_version("1.8") do
    def as_name(name)
      name.to_s
    end
  end

  in_ruby_version("1.9", "2.0") do
    def as_name(name)
      name.to_sym
    end
  end

  # Ok, now back to the Koans.
  # -------------------------------------------------------------------

  def test_each_is_a_method_on_arrays
    assert_equal true, [].methods.include?(as_name(:each))
  end 

这是完整的错误；

➜  koans git:(main) ✗ ruby path_to_enlightenment.rb
AboutIteration#test_each_is_a_method_on_arrays has damaged your karma.

The Master says:
  You have not yet reached enlightenment.
  Do not lose hope.

The answers you seek...
  undefined method `as_name' for #<AboutIteration:0x00007fcbc6031dc8 @name=:test_each_is_a_method_on_arrays, 
@failure=#<NoMethodError: undefined method `as_name' for #<AboutIteration:0x00007fcbc6031dc8 ...>>, @koan_cou
nt=17, @step_count=158, @koan_file="AboutIteration">

Please meditate on the following code:
  /Users/amirulasyraf/Documents/koans/about_iteration.rb:27:in `test_each_is_a_method_on_arrays'

when you lose, don't lose the lesson
your path thus far [............................X_____________________] 157/278 (56%)

Answer 1

您正在使用的RubyKoans版本已经过时七年了，并且只支持 1.8、1.9和2.0。当前版本的RubyKoans支持Ruby2.7(但不支持3.0)。

Answer 2

在in_ruby_version块中定义了#as_name。将Ruby3添加到版本列表中为我做到了这一点。

 in_ruby_version("1.9", "2", "3") do
    def as_name(name)
      name.to_sym
    end
  end