使用两个不同的 pytest 夹具运行测试 [英] Run a test with two different pytest fixtures

问题描述

我目前正在使用 pytest 和 Selenium 测试一个网络应用程序.所有页面都有主页"和注销"链接，所以我写了一个这样的测试:

I am currently testing a web app using pytest and Selenium. All pages have "Home" and "Log Out" links, so I have written a test like this:

def test_can_log_out(page):
    link = page.find_element_by_partial_link_text('Log Out')
    link.click()
    assert 'YOU HAVE SUCCESSFULLY LOGGED OFF!' in starting_page.page_source

现在对于 page 固定装置，我正在模拟登录过程.我把它分成几个固定装置:

Now for the page fixture, I am simulating the login process. I have this broken into several fixtures:

1. 获取 Selenium WebDriver 实例

1. Get the Selenium WebDriver instances

@pytest.fixture()
def browser(request, data, headless):
    b = webdriver.Firefox(executable_path=DRIVERS_PATH + '/geckodriver')
    yield b
    b.quit()

登录网络应用

Log in to the web app

@pytest.fixture()
def login(browser):
    browser.get('http://example.com/login)
    user_name = browser.find_element_by_name('user_name')
    user_name.send_keys('codeapprentice')
    password = browser.find_element_by_name('password')
    password.send_keys('password1234')
    submit = browser.find_element_by_name('submit')
    submit.click()
    return browser

访问页面

Visit a page

@pytest.fixture()
def page(login):
    link = login.find_element_by_partial_link_text('Sub Page A')
    link.click()
    return login

这很好用，我可以测试从这个页面注销.现在我的问题是我有另一个可以从页面 A"访问的页面:

This works very well and I can test logging out from this page. Now my question is that I have another page which can be visited from "Page A":

@pytest.fixture()
def subpage(page):
    button = login.find_element_name('button')
    button.click()
    return page

现在我也想用这个夹具运行完全相同的测试.当然，我可以复制/粘贴并进行一些更改:

Now I want to run the exact same test with this fixture, also. Of course, I can copy/paste and make a few changes:

def test_can_log_out_subpage(subpage):
    link = page.find_element_by_partial_link_text('Log Out')
    link.click()
    assert 'YOU HAVE SUCCESSFULLY LOGGED OFF!' in starting_page.page_source

然而，这违反了 DRY 原则.如何在不重复的情况下重用 test_can_log_out()?

However, this violates the DRY principle. How can I reuse test_can_log_out() without this repetition?

推荐答案

在这里，您可以传递您的 fixtures ，它为您的页面和子页面提供测试参数，这些参数将作为第一步动态调用测试.如下图.

Here, you can pass your fixtures which gives your pages and subpages in test parameters which would be called dynamically as a first step of test. Like below.

当设备位于测试所在的同一页面时:

When fixtures are on same page where tests are:

测试文件.py

import pytest

class TestABC():
    @pytest.fixture
    def browser(self,request):
        print "browser"

    @pytest.fixture
    def login(self,request,browser):
        print "login"

    @pytest.fixture
    def subpage1(self,request,login):
        print "subpage1"

    @pytest.fixture
    def subpage2(self, request, login):
        print "subpage2"

    @pytest.fixture
    def subpage3(self, request, login):
        print "subpage3"

    @pytest.mark.parametrize('sub_page',
                             ['subpage1', 'subpage2', 'subpage3'])
    def test_can_log_out_subpage(self,sub_page,request):
        request.getfixturevalue(sub_page) # with pytest>=3.0.0 use getfixturevalue instead of getfuncargvalue
        print "test output of ", sub_page

输出:

browser
login
subpage1
test output of  subpage1
browser
login
subpage2
test output of  subpage2
browser
login
subpage3
test output of  subpage3

当夹具在 conftest.py 时

When fixtures are at conftest.py

import pytest


@pytest.fixture
def browser(request):
        print "browser"

@pytest.fixture
def login(request):
    print "login"

@pytest.fixture
def subpage1(request,login):
    print "subpage1"

@pytest.fixture
def subpage2(request, login):
    print "subpage2"

@pytest.fixture
def subpage3(request, login):
    print "subpage3"

测试文件.py

import pytest

class TestABC():

    @pytest.mark.parametrize('sub_page',
                             ['subpage1', 'subpage2', 'subpage3'])
    def test_can_log_out_subpage(self,sub_page,request):
        request.getfixturevalue(sub_page)  # with pytest>=3.0.0 use getfixturevalue instead of getfuncargvalue
        print "test output of ", sub_page

在这里，您也将获得与上述相同的输出.

Here, you will also get same output as above.

希望能帮到你.

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