Pytest does not recognize new command line option

Question

In my conftest.py I added following code

import pytest
from selenium import webdriver


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


@pytest.fixture(scope="class")
def setup(request):
    browser_name = request.config.getoption("--browser_name")
    if browser_name == "chrome":
        driver = webdriver.Chrome()
    elif browser_name == "firefox":
        driver = webdriver.Firefox()
    elif browser_name == "Edge":
        driver = webdriver.Edge()
    driver.get("https://rahulshettyacademy.com/angularpractice/")
    driver.maximize_window()
    request.cls.driver = driver
    yield
    driver.close()

I want to choose browser name from command line, but pytest does not recognize it when I run my tests by pytest --browser_name firefox. What might be the problem?
ERROR message:

ERROR: usage: pytest [options] [file_or_dir] [file_or_dir] [...]
pytest: error: unrecognized arguments: --browser_name
  inifile: None
  rootdir: /home/*****/PycharmProjects/SeleniumFramework

Asked By: Karol

||

Source

Answer 1

Possibly an issue with how you’re using the fixture, or the location of you’re conftest. Perhaps you have an issue with your version of pytest? The following works with pytest-4.6.9

conftest.py

import pytest


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


@pytest.fixture(scope="class")
def setup(request):
    if (browser_name := request.config.getoption("--browser_name")) == "chrome":
        print("chrome")
    else:
        print("Not chrome")

test_foo.py

def test_foo(setup):
    pass

Then with pytest test_foo.py -s --browser_name="firefox" I get

collected 1 item                                                                                                                                                                                                  

test_foo.py Not chrome
.

===================== 1 passed in 0.07 seconds =========================

Answered By: Josmoor98

Answer 2

The problem is resolved – I didn’t have Firefox installed on my Desktop. After installation and environment restart everything works fine.

Answered By: Karol

Pytest does not recognize new command line option

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