Pytest Finalizers - 执行顺序 [英] Pytest Finalizers - order of execution

问题描述

我正在编写 py.test 程序，考虑以下 py.test 夹具代码:

I am writing py.test program, considering the following py.test fixture code:

@pytest.fixture(scope="class")
def my_fixture(request):
    def fin1():
        print("fin1")
request.addfinalizer(fin1)
    def fin2():
        print("fin2")
request.addfinalizer(fin2)

执行顺序是什么?我没有在文档中找到任何关于终结器执行顺序的提及.

What the execution order? I didn't find any mentions on the documentation regarding the execution order of finalizers.

提前致谢.

推荐答案

我想最简单的方法是尝试使用 -s 运行您的代码，然后查看打印的顺序.

I guess the easiest way would be to just try running your code with -s and see in which order the prints happen.

我的建议是使用 yield 固定装置，这样您就可以轻松地明确控制拆卸顺序:

What I'd recommend is to use yield fixtures instead, so you can explicitly control the teardown order easily:

@pytest.yield_fixture(scope="class")
def my_fixture():
    # do setup
    yield
    fin1()
    fin2()

从 pytest 3.0(即将发布)开始，这也可以通过将 yield 与普通的 @pytest.fixture 装饰器一起使用，并将成为推荐的拆解方式.

Starting with pytest 3.0 (which will be released soon), this will also work by just using yield with the normal @pytest.fixture decorator, and will be the recommended way of doing teardown.

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