content: import collections
  from unittest.mock import Mock
  
  from kopf.reactor.registries import OperatorRegistry
  from kopf.structs.resources import Resource
  
  
  def test_resources():
      handler = Mock()
  
      resource1 = Resource('group1', 'version1', 'plural1')
      resource2 = Resource('group2', 'version2', 'plural2')
  
      registry = OperatorRegistry()
      registry.resource_watching_handlers[resource1].append(handler)
      registry.resource_changing_handlers[resource2].append(handler)
      registry.resource_watching_handlers[resource2].append(handler)
      registry.resource_changing_handlers[resource1].append(handler)
  
      resources = registry.resources
  
      assert isinstance(resources, collections.abc.Collection)
      assert len(resources) == 2
  
      assert resource1 in resources
      assert resource2 in resources
  