可能是一个业余爱好者的标志，我想知道问题是不是公案(而不是我)，但是，考虑一下这个公案

def test_calling_global_methods_without_parentheses
    result = my_global_method 2, 3
    assert_equal __, result
  end

注意，my_global 方法是

def my_global_method(a,b)
  a + b
end

这是它在终端给我的提示

The answers you seek...
  <"FILL ME IN"> expected but was  <5>.

我也是这样

  def test_calling_global_methods_without_parentheses
    result = my_global_method 2, 3
    assert_equal 5, result
  end

我得到了这个错误

Users/mm/Sites/koans/about_methods.rb:21:in `eval': (eval):1: syntax error, unexpected tINTEGER, expecting keyword_do or '{' or '(' (SyntaxError)
assert_equal 5, my_global_method 2, 3
                                  ^
    from /Users/mm/Sites/koans/about_methods.rb:21:in `test_sometimes_missing_parentheses_are_ambiguous'
    from /Users/mm/Sites/koans/edgecase.rb:377:in `meditate'
    from /Users/mm/Sites/koans/edgecase.rb:449:in `block in walk'
    from /Users/mm/Sites/koans/edgecase.rb:460:in `block (3 levels) in each_step'
    from /Users/mm/Sites/koans/edgecase.rb:458:in `each'
    from /Users/mm/Sites/koans/edgecase.rb:458:in `block (2 levels) in each_step'
    from /Users/mm/Sites/koans/edgecase.rb:457:in `each'
    from /Users/mm/Sites/koans/edgecase.rb:457:in `each_with_index'
    from /Users/mm/Sites/koans/edgecase.rb:457:in `block in each_step'
    from /Users/mm/Sites/koans/edgecase.rb:455:in `catch'
    from /Users/mm/Sites/koans/edgecase.rb:455:in `each_step'
    from /Users/mm/Sites/koans/edgecase.rb:448:in `walk'
    from /Users/mm/Sites/koans/edgecase.rb:470:in `block in <top (required)>'

有谁知道这个问题，或者你能告诉我如何跳过 koan 吗？

最佳答案

哦，我测试了这个公案。如果您注意到错误在第 21 行，而不是“test_calling_global_methods_without_parentheses”方法。这是“test_sometimes_missing_parentheses_are_ambiguous”方法应该出错的地方。您应该更正该方法。

def test_calling_global_methods_without_parentheses
  result = my_global_method 2, 3
  assert_equal 5, result           # You're fine with this koan.
end

# (NOTE: We are Using eval below because the example code is
# considered to be syntactically invalid).                  
def test_sometimes_missing_parentheses_are_ambiguous
  eval "assert_equal 5, my_global_method 2, 3" # ENABLE CHECK
  # **LOOK HERE~~~ HERE IS THE ERROR YOU SEE** Just correct it.

如果有任何您不知道如何处理的公案，请发表评论。

关于RubyKoans : broken koan?，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/12102506/