text: import pytest
  xfail = pytest.mark.xfail
  
  @xfail
  def test_hello():
      assert 0
  
  @xfail(run=False)
  def test_hello2():
      assert 0
  
  @xfail("hasattr(os, 'sep')")
  def test_hello3():
      assert 0
  
  @xfail(reason="bug 110")
  def test_hello4():
      assert 0
  
  @xfail('pytest.__version__[0] != "17"')
  def test_hello5():
      assert 0
  
  def test_hello6():
      pytest.xfail("reason")
  
  @xfail(raises=IndexError)
  def test_hello7():
      x = []
      x[1] = 1
  