text: import pytest
  
  
  @pytest.fixture
  def ok():
      class Ok:
          def __init__(self):
              self.value = []
  
          def __lt__(self, v):
              self.value.append(v)
              return v
  
          def __iter__(self):
              v, self.value = self.value, []
              return iter(v)
  
      return Ok()
  