小编omd*_*del的帖子

我正在尝试创建一个带有逻辑的afterEach挂钩,只有在前一次测试失败时才会触发.例如:

it("some_test1", function(){
  // something that could fail
})

it("some_test2", function(){
  // something that could fail
})

afterEach(function(){
  if (some_test_failed) {
    // do something to respond to the failing test
  } else {
    // do nothing and continue to next test
  }
})

但是,我没有办法在afterEach钩子中检测测试是否失败.是否有某种事件监听器我可以附加到摩卡？也许是这样的:

myTests.on("error", function(){ /* ... */ })

在不使用/扩展Array类的情况下在Ruby中实现链表的最佳方法是什么？这是我过去使用的一个实现,但它似乎不是最好的方法:

class Node

    attr_accessor :value, :next_node

    def initialize(value = nil)
        @value = value
    end

    def to_s
        @value
    end

end

class SinglyLinkedList

    attr_accessor :head

    def initialize(first_value=nil)
        @head = Node.new(first_value) if first_value
    end

    def add(value)
        #adds a new node to the list, amakes it the new head and links it to the former head
        new_node = Node.new(value)
        new_node.next_node = @head

        @head = new_node
    end

    def remove
        @head = @head.next_node
    end
end