用两个不同的pytest灯具进行测试

Question

我目前正在使用pytest和Selenium测试一个Web应用程序.所有页面都有"Home"和"Log Out"链接,所以我写了一个这样的测试:

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夹具,我正在模拟登录过程.我把它分成了几个装置:

1. 获取Selenium WebDriver实例

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

2. 登录Web应用程序

   @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
   

3. 访问页面

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

这非常有效,我可以测试从此页面注销.现在我的问题是我有另一个页面可以从"页面A"访问:

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

现在我想用这个灯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:

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

但是,这违反了DRY原则.test_can_log_out()如果没有这种重复,我该如何重用？

Answer 1

在这里,您可以传递您fixtures的页面和子页面在测试参数中,这些参数将作为测试的第一步动态调用.如下.

当灯具位于测试所在的同一页面时:

testfile.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.getfuncargvalue(sub_page)
        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

当灯具处于conftest.py时

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"

testfile.py

import pytest

class TestABC():

    @pytest.mark.parametrize('sub_page',
                             ['subpage1', 'subpage2', 'subpage3'])
    def test_can_log_out_subpage(self,sub_page,request):
        request.getfuncargvalue(sub_page)
        print "test output of ", sub_page

在这里,您还将获得与上面相同的输出.

希望它会对你有所帮助.

Answer 2

一般来说 ：

@pytest.fixture(scope="function")
def fixture_one():
    # set up things
    yield
    # teardown


@pytest.fixture(scope="function")
def fixture_two():
    # do things


@pytest.mark.parametrize('fixture_func', [fixture_one, fixture_two])
def test_things(fixture_func, request):
    request.getfixturevalue(fixture_func.__name__)
    assert foo == bar

Answer 3

这是我设计的一个例子来演示灯具的重用。一个固定装置可以引用另一个固定装置 - 允许采用分层方法来编写测试。请看看哪一款适合您：

import pytest

@pytest.yield_fixture()
def browser():
    print("Launching browser")
    b = {}
    yield b
    print("quitting browser")


@pytest.fixture()
def login(browser):
    print("logging in")


@pytest.fixture()
def page(login):
    print("on page")


@pytest.fixture()
def subpage(page):
    print("on subpage")


@pytest.yield_fixture()
def logout(page):
    yield page
    print('performing logout using fixtures')


def test_can_log_out(page):
    print("logging out using test")
    pass


def test_can_log_style2(logout):
    print("logging out using fixture")
    pass


def test_logout_page2(subpage, logout):
    print("test can logout from page 2")
    pass


def test_logout_page2_style2(subpage):
    print("test can logout from page 2 style2")
    test_can_log_out(subpage)
    pass

test_can_log_out 的输出

Launching browser
logging in
on page
.logging out using test
quitting browser

test_can_log_style2 的输出

Launching browser
logging in
on page
.logging out using fixture
performing logout using fixtures
quitting browser

test_logout_page2 的输出

Launching browser
logging in
on page
on subpage
.test can logout from page 2
performing logout using fixtures
quitting browser

test_logout_page2_style2 的输出

Launching browser
logging in
on page
on subpage
.test can logout from page 2 style2
logging out using test
quitting browser