Question

我想覆盖发送Object，就像这样

class Object
    @@object_send = self.instance_method( :send )

    def send *args
        @@object_send.bind( self ).call *args
    end
end

或

class Object
    def send *args
        __send__ *args
    end
end

或

class Object
    alias_method :old_send, :send

    def send *args
        old_send *args
    end
end

但所有这些选项都会导致出现此错误

/opt/local/lib/ruby1.9/gems/1.9.1/gems/minitest-2.8.1/lib/minitest/unit.rb:871:in `block in process_args': unsupported argument type: Integer (ArgumentError)
    from /opt/local/lib/ruby1.9/gems/1.9.1/gems/minitest-2.8.1/lib/minitest/unit.rb:862:in `new'
    from /opt/local/lib/ruby1.9/gems/1.9.1/gems/minitest-2.8.1/lib/minitest/unit.rb:862:in `process_args'
    from /opt/local/lib/ruby1.9/gems/1.9.1/gems/minitest-2.8.1/lib/minitest/unit.rb:912:in `_run'
    from /opt/local/lib/ruby1.9/gems/1.9.1/gems/minitest-2.8.1/lib/minitest/unit.rb:905:in `run'
    from /opt/local/lib/ruby1.9/gems/1.9.1/gems/minitest-2.8.1/lib/minitest/unit.rb:685:in `block in autorun'

我能做些什么吗？

更新：尝试更新到2.9.1，但尚未解决问题

Answer 1

如果没有MWE，我很难分析您的问题。也许我找到了你的问题的第一个提示。

我尝试重建错误，但没有成功：

class Object
    alias_method :old_send, :send

    def send *args
        old_send *args
    end
end
n = 5
puts n.send(:*, 2)

我得到10。

但是我遇到了问题：

puts n.send(:times){ |i| p i } #-> #<Enumerator:0xb778a8>

稍加修改即可看出会发生什么：

class Object
    alias_method :old_send, :send

    def send *args
        puts "send called with #{args}"  #--> [:times]
        old_send *args
    end
end

n = 5
n.send(:times){ |i| p i }

你得到了

send called with [:times]

缺少该块。您必须将proc参数添加到重新定义：

class Object
    alias_method :old_send, :send

    def send *args, &proc
        old_send *args, &proc
    end
end

n = 5
n.send(:times){ |i| p i } #-> 1 2 3 4 5

MiniTest正在崩溃

1 个答案: