如何将命令行参数传递给测试文件（pytest）中的方法？

Question

我正在使用 pytest。有两个文件，conftest.py 和 Test1.py。在执行测试之前需要执行特定的方法。现在将其命名为dummy（如果有任何建议将其更改为test_dummy 也可以）。它现在完全可以正常工作。如何将cmd-line 参数传递给这个被显式调用的dummy 方法？

Test1.py

import time

tmp1 = ""
tmp2 = ""

class Test1:

    def dummy(self):
        global tmp1
        global tmp2
        tmp1 = "Sometext"
        ts = int(time.time())
        tmp2 = tmp1 + str(ts)
        # Need this `ts` value to be passed from command-line and should be accessed in this `dummy`
        # And this dummy to be called before the execution of any tests.
        # Could have added this conftest.py , but my requirement is to create a folder by getting method names here. So making a  separate `dummy`


    def testA(self, set_up):
        val = set_up[0]
        logging.info(val)
        # Do - Something, call some function by passing the `val`

    def testB(self, set_up):
        val = set_up[0]
        logging.info(val)
        # Do - Something, call some function by passing the `val`

    def testC(self, set_up):
        val = set_up[0]
        logging.info(val)
        # Do - Something, call some function by passing the `val`


class Test2:


    def testA(self,set_up):
        val = set_up[0]
        logging.info(val)
        #Do - Something, call some function by passing the `val`

    def testB(self,set_up):
        val = set_up[0]
        logging.info(val)
        # Do - Something, call some function by passing the `val`

    def testC(self,set_up):
        val = set_up[0]
        logging.info(val)
        # Do - Something, call some function by passing the `val`


obj1 = Test1()
obj1.dummy()      #Explicitly calling it.

pytest -s -v test1.py::Test2

conftest.py

import pytest

def tear_down():
    print "\nTEARDOWN after all tests"


def pytest_addoption(parser):
    parser.addoption(
        "--a", action="store", default=None, help="value A")

    parser.addoption(
        "--b", action="store", default=None, help="value B")

    parser.addoption(
        "--c", action="store", default=None, help="value C")

    parser.addoption(
        "--d", action="store", default=None, help="value D") # Need this value to be available in `dummy`

@pytest.fixture(autouse=True)
def set_up(request):
    print "\nSETUP before all tests"

    if request.function.__name__ == "testA": 
        return([request.config.getoption("--a"),request.config.getoption("--b"),request.config.getoption("--c")])
    elif request.function.__name__ == "testB":
        return ([request.config.getoption("--a"), request.config.getoption("--b"), request.config.getoption("--c")])
    elif request.function.__name__ == "testC":
        return ([request.config.getoption("--a"), request.config.getoption("--b"), request.config.getoption("--c")])

Answer 1

以此为参考：

import sys


def dummy():
    print(sys.argv[0])
    print(str(sys.argv))


dummy()

Answer 2

你可以使用pytest_addoption:

def pytest_addoption(parser):
    parser.addoption("--dummy", action="store", default="dummy")

它添加了一个名为dummy 的新命令行选项，然后可以通过以下方式在夹具中访问：

request.config.getoption("--dummy")

例如

@pytest.fixture
def dummy(request):
    dummy_val = request.config.getoption("--dummy")

请注意，以这种方式使您的虚拟函数成为一个固定装置将允许您在所有测试之前以通常的 pytest 方式自动运行。