python - pytest:在线程中运行

Question

一个名为 pytest_demo.py 的 python 文件:

import pytest
import threading

@pytest.mark.test
class TestDemo():
    def test_demo_false(self):
        assert False

    def test_demo_true(self):
        assert True

    def test_demo_thread_true(self):
        thread1 = MyThread(True)
        thread1.start()

    def test_demo_thread_false(self):
        thread1 = MyThread(False)
        thread1.start()


class MyThread(threading.Thread):
    def __init__(self, flag):
        threading.Thread.__init__(self)
        self.flag = flag

    def run(self):
        print "Starting "
        assert self.flag


if __name__ == "__main__":
    pytest.main(['-v', '-m', 'test', 'pytest_demo.py'])

运行“python pytest_demo.py”后的输出:

pytest_demo.py:8: TestDemo.test_demo_false FAILED
pytest_demo.py:11: TestDemo.test_demo_true PASSED
pytest_demo.py:14: TestDemo.test_demo_thread_true PASSED
pytest_demo.py:18: TestDemo.test_demo_thread_false PASSED

在线程中，为什么 TestDemo.test_demo_thread_false 通过了？

Answer 1

因为 AssertionError 在一个单独的线程中被引发。您的 test_demo_thread_false 方法不会断言任何内容，它只会生成一个新线程，而且它始终会成功执行此操作。