py.test conftest - 基于sys.argv修改Fixture参数

问题描述 投票:2回答:3

我有一个用于Selenium测试的工作pytest环境。我在conftest.py中使用了一个参数化的fixture,它允许我测试所有不同的浏览器,而不必重写测试。我想将命令行参数传递给我的脚本,以便我可以让它只运行特定的浏览器,而不是所有浏览器。要做到这一点,我需要修改传递给我的fixture的变量。到目前为止,我还没弄清楚如何做到这一点。我的下面示例不起作用,可能是因为pytest从我的启动脚本描述的变量中单独解析conftest.py。

#conftest.py
browsers = { "ff" : webdriver.Firefox, "ie" : webdriver.Ie }
@pytest.yield_fixture(params=browsers.keys())
def browser(request):
    driver = browsers[request.param]()
    yield driver
    driver.quit()

#test_simple.py
def test_simple(browser):
    browser.get("http://stackoverflow.com")

#main.py
browsers = {}
if __name__ == "__main__":
    if len(sys.argv) > 1:
        for arg in sys.argv[1:]:
            if arg == "-ff":
                browsers = { "ff" : webdriver.Firefox }
            elif arg == "-ie":
                browsers = { "ie" : webdriver.Ie }
            elif arg == "-all":
                browsers = { "ff" : webdriver.Firefox, "ie" : webdriver.Ie }

    pytest.main()

如何将值传递给conftest.py中的参数化夹具?


python selenium pytest
3个回答
1
投票

见:Pass different values to a test function, depending on command line options

您无法使用命令行选项实际更改参数化,因为在导入期间会发生参数化定义,但如果用户在命令行中指定了一个浏览器,则可以轻松跳过其他浏览器的测试:

# conftest.py
import pytest

browsers = {"ff": 'FIREFOX', 'ie': 'INTERNETEXPLORER'}

def pytest_addoption(parser):
    parser.addoption("--browser", default='',
        type='choice', choices=sorted(browsers),
        help="runs tests only for given browser")    

@pytest.yield_fixture(params=browsers.keys())
def browser(request):
    selected = request.config.getoption('browser')
    if selected and selected != request.param:
        pytest.skip('browser {} selected in the command line'.format(selected))
    driver = browsers[request.param]
    yield driver

有了这个,当用户运行pytest而没有将任何值传递给--browser时,所有测试都像往常一样运行:

============================= test session starts =============================
platform win32 -- Python 2.7.6 -- py-1.4.26 -- pytest-2.7.0.dev1 -- X:\temp\sandbox\.env27\Scripts\python.exe
plugins: xdist
collecting ... collected 2 items

test_simple.py::test_simple[ie] PASSED
test_simple.py::test_simple[ff] PASSED

========================== 2 passed in 0.01 seconds ===========================

但是,如果用户例如通过--browser=ie,则会跳过firefox测试:

============================= test session starts =============================
platform win32 -- Python 2.7.6 -- py-1.4.26 -- pytest-2.7.0.dev1 -- X:\temp\sandbox\.env27\Scripts\python.exe
plugins: xdist
collecting ... collected 2 items

test_simple.py::test_simple[ie] PASSED
test_simple.py::test_simple[ff] SKIPPED

===================== 1 passed, 1 skipped in 0.01 seconds =====================

0
投票

只需使用ENV变量:

#conftest.py
browsers = { "ff" : webdriver.Firefox, "ie" : webdriver.Ie }
@pytest.yield_fixture(params=browsers.keys())
def browser(request):
    driver = browsers[request.param]()
    yield driver
    driver.quit()

#test_simple.py
def test_simple(browser):
    browser.get("http://stackoverflow.com")

#main.py
browsers = {}
browserToRun = os.environ.get('BROWSER_TO_RUN')
if __name__ == "__main__":
            if browserToRun == "ff":
                browsers = { "ff" : webdriver.Firefox }
            elif browserToRun == "ie":
                browsers = { "ie" : webdriver.Ie }
            elif browserToRun == "all":
                browsers = { "ff" : webdriver.Firefox, "ie" : webdriver.Ie }

    pytest.main()

并运行如下测试:

BROWSER_TO_RUN=ff run_tests.py


0
投票
 pytest -k test_simple['ie'] 

以上行将选择性地运行匹配测试

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