text: import pytest
  from grappa.test import Test as GrappaTest
  from grappa import should, expect
  
  
  @pytest.mark.parametrize('operator', (
      'to', 'has', 'have', 'include', 'do', 'that', 'which', '_is'
  ))
  def test_assertion_attributes(operator):
      assert isinstance(getattr(should, operator), GrappaTest)
      assert getattr(should, operator)._ctx.negate is False
      assert isinstance(getattr(expect, operator), GrappaTest)
      assert getattr(expect, operator)._ctx.negate is False
  
  
  @pytest.mark.parametrize('operator', (
      'not_to', 'to_not', 'does_not', 'do_not', '_not',
      'not_have', 'not_has', 'have_not', 'has_not', 'dont'
  ))
  def test_negation_attributes(operator):
      assert isinstance(getattr(should, operator), GrappaTest)
      assert getattr(should, operator)._ctx.negate
      assert isinstance(getattr(expect, operator), GrappaTest)
      assert getattr(expect, operator)._ctx.negate
  
  
  def test_negation_called_before_non_negation_attributes():
      expect(False).to_not.have.true
      expect(False).not_to.be.true
  
      False | should.to_not.have.true
      False | should.not_to.be.true
  