如何在pytest中为特定方法或功能定义设置和拆卸功能？

Question

Pytest supports classical xunit style setup and teardown on the module/class/method/function level (in addition to pytests dependency injection mechanism ). The function level setup and teardown functions are invoked for every test function in the module. How can I define setup and teardown functions for specific test functions?

Answer 1

import pytest

@pytest.fixture
def resource():
   resource = foo()

   yield resource

   resource.cleanup()

def test_feature(resource):
   assert bar(resource) == 27

Using fixtures for setup and cleanup is a better approach that the try...finally suggested in the question comments, even when there is no code reuse goal: your single test is focused on asserting the appropriate conditions, and not on resource cleanup.