old_contents: # coding=utf-8
  
  import pytest
  
  from xpaw.config import Config
  from xpaw.spidermws import *
  from xpaw.http import HttpRequest
  from xpaw.item import Item
  from xpaw.errors import NotEnabled
  
  
  class Cluster:
      def __init__(self, loop=None, **kwargs):
          self.loop = loop
          self.config = Config(kwargs)
  
  
  class TestDepthMiddleware:
      def test_handle_output(self):
          class R:
              def __init__(self, depth=None):
                  self.meta = {}
                  if depth is not None:
                      self.meta["depth"] = depth
  
          mw = DepthMiddleware.from_cluster(Cluster(max_depth=1))
          req = HttpRequest("http://httpbin.org", "GET")
          item = Item()
          res = [i for i in mw.handle_output(R(), [req, item])]
          assert res == [req, item] and req.meta['depth'] == 1
          res = [i for i in mw.handle_output(R(0), [req, item])]
          assert res == [req, item] and req.meta['depth'] == 1
          res = [i for i in mw.handle_output(R(1), [req, item])]
          assert res == [item] and req.meta['depth'] == 2
  
      def test_handle_start_requests(self):
          mw = DepthMiddleware.from_cluster(Cluster())
          req = HttpRequest("http://httpbin.org", "GET")
          mw.handle_start_requests([req])
          assert req.meta.get('depth') == 0
  
new_contents: # coding=utf-8
  
  import pytest
  
  from xpaw.config import Config
  from xpaw.spidermws import *
  from xpaw.http import HttpRequest
  from xpaw.item import Item
  from xpaw.errors import NotEnabled
  
  
  class Cluster:
      def __init__(self, loop=None, **kwargs):
          self.loop = loop
          self.config = Config(kwargs)
  
  
  class TestDepthMiddleware:
      def test_handle_output(self):
          class R:
              def __init__(self, depth=None):
                  self.meta = {}
                  if depth is not None:
                      self.meta["depth"] = depth
  
          mw = DepthMiddleware.from_cluster(Cluster(max_depth=1))
          req = HttpRequest("http://httpbin.org", "GET")
          item = Item()
          res = [i for i in mw.handle_output(R(), [req, item])]
          assert res == [req, item] and req.meta['depth'] == 1
          res = [i for i in mw.handle_output(R(0), [req, item])]
          assert res == [req, item] and req.meta['depth'] == 1
          res = [i for i in mw.handle_output(R(1), [req, item])]
          assert res == [item] and req.meta['depth'] == 2
  
      def test_handle_start_requests(self):
          mw = DepthMiddleware.from_cluster(Cluster())
          req = HttpRequest("http://httpbin.org", "GET")
          res = [i for i in mw.handle_start_requests([req])]
          for r in res:
              assert r.meta.get('depth') == 0
  
subject: fix test