pytest标记预期会失败的测试xfail

import pytest

class TestClass:
    @pytest.mark.xfail(reason="预期失败")
    def test_one(self):
        assert True

    @pytest.mark.xfail(reason="预期失败")
    def test_two(self):
        assert False

    def test_three(self):
        assert True

pytest test_demo5.py

=== test session starts ====
collected 3 items

test_demo5.py Xx. 

=== 1 passed, 1 xfailed, 1 xpassed in 0.12 seconds ===

pytest -v test_demo5.py

=== test session starts ===
collected 3 items

test_demo5.py::TestClass::test_one XPASS                                             
test_demo5.py::TestClass::test_two XFAIL                                       
test_demo5.py::TestClass::test_three PASSED                                
=== 1 passed, 1 xfailed, 1 xpassed in 0.08 seconds ===

x表示XFAIL，预期失败，实际也失败

X表示XPASS，预期失败，实际运行没有失败