我正在尝试使用 Python、Pytest 构建一个基于 Selenium 的自动化框架。
我的目的是在类级别创建一个驱动程序实例,方法是在文件 conftest.py 中初始化它并使其在所有测试用例中可用,以便用户不需要创建驱动程序每个测试用例中的实例。
conftest.py 中的驱动程序实例:
@pytest.fixture(scope="class")
def get_driver(request):
from selenium import webdriver
driver = webdriver.Chrome()
request.cls.driver = driver
yield
driver.quit()
BaseTestCase 类如下所示:
@pytest.mark.usefixtures("get_driver")
class BaseTestCase(unittest.TestCase):
def __init__(self, *args, **kwargs):
super(BaseTestCase, self).__init__(*args, **kwargs)
@classmethod
def setUpClass(cls):
if hasattr(super(BaseTestCase, cls), "setUpClass"):
super(BaseTestCase, cls).setUpClass()
我的测试用例如下:
from ..pages.google import Google
class Test_Google_Page(BaseTestCase):
@classmethod
def setUpClass(self):
self.page = Google(self.driver, "https://www.google.com/")
我的页面 Google 扩展到 BasePage,如下所示:
class BasePage(object):
def __init__(self, driver, url=None, root_element = 'body'):
super(BasePage, self).__init__()
self.driver = driver
self._root_element = root_element
self.driver.set_script_timeout(script_timeout)
当我执行测试用例时,出现以下错误:
@classmethod
def setUpClass(self):
> driver = self.driver
E AttributeError: type object 'Test_Google_Page' has no attribute 'driver'
如何通过简单地调用 self.driver 使驱动程序实例在我的测试用例中可用?
最佳答案
类作用域的固定装置在 setUpClass
类方法之后执行,因此当执行 Test_Google_Page.setUpClass
时,get_driver
尚未运行。查看执行顺序:
import unittest
import pytest
@pytest.fixture(scope='class')
def fixture_class_scoped(request):
print(f'{request.cls.__name__}::fixture_class_scoped()')
@pytest.mark.usefixtures('fixture_class_scoped')
class TestCls(unittest.TestCase):
@classmethod
def setUpClass(cls):
print(f'{cls.__name__}::setUpClass()')
def setUp(self):
print(f'{self.__class__.__name__}::setUp()')
@pytest.fixture()
def fixture_instance_scoped(self):
print(f'{self.__class__.__name__}::fixture_instance_scoped()')
@pytest.mark.usefixtures('fixture_instance_scoped')
def test_bar(self):
print(f'{self.__class__.__name__}::test_bar()')
assert True
当使用例如运行测试时pytest -sv
,输出结果:
TestCls::setUpClass()
TestCls::fixture_class_scoped()
TestCls::fixture_instance_scoped()
TestCls::setUp()
TestCls::test_bar()
因此,解决方案是将代码从 setUpClass
移至例如设置
:
class Test_Google_Page(BaseTestCase):
def setUp(self):
self.page = Google(self.driver, "https://www.google.com/")
I am afraid I may not use setUp because in my most of my class file I have multiple test cases and I just want to do one time setup in setUpClass instead of launching in each time before calling any test method.
然后我会将代码从 setUpClass
移动到另一个类范围的固定装置:
import pytest
@pytest.mark.usefixtures('get_driver')
@pytest.fixture(scope='class')
def init_google_page(request):
request.cls.page = Google(request.cls.driver,
"https://www.google.com/")
@pytest.mark.usefixtures('init_google_page')
class Test_Google_Page(BaseTestCase):
...
以前的 setUpClass
现在是 init_google_page
固定装置,它将在 get_driver
之后调用(因为 pytest.mark.usefixtures( 'get_driver')
)。
关于python - 如何使 pytest 驱动程序实例在我的测试用例中可用?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/51682413/