I am getting fixture error when running python selenium scripts from command line

Question

I am in the process of creating an automation framework using selenium and python so in my conftest.py file I have used fixtures but when I am running my test cases through cmd line I am getting error

I have checked again and again but I am not getting the root cause for this error

This code is under my conftest.py file

import pytest
@pytest.fixture(scope="class")
def test_setup(request):
    from selenium import webdriver

    browser =  request.config.getoption("--browser")
    if browser == "chrome":
        driver = webdriver.Chrome(executable_path="/home/akash/PycharmProjects/AutomationFramework/drivers/chromedriver")     
        request.cls.driver = driver
        yield
        driver.quit()

And below is the test case file

@pytest.mark.usefixtures("test_setup")
class TestLogin:

    def test_login(self):
        driver = self.driver
        driver.get(utils.URL)

When I am running the command as python -m pytest I am getting the below error However, it should have opened up the browser and do the job

Error which I am getting

rootdir: /home/akash/PycharmProjects/AutomationFramework
plugins: html-1.21.1, metadata-1.8.0
collected 2 items                                                                                                                                    

tests/login_test.py EE                                                                                                                         [100%]

======================================================================= ERRORS =======================================================================
_______________________________________________________ ERROR at setup of TestLogin.test_login _______________________________________________________

cls = <class '_pytest.runner.CallInfo'>, func = <function call_runtest_hook.<locals>.<lambda> at 0x7f8e17b4ed08>, when = 'setup'
reraise = (<class '_pytest.outcomes.Exit'>, <class 'KeyboardInterrupt'>)

    @classmethod
    def from_call(cls, func, when, reraise=None):
        #: context of invocation: one of "setup", "call",
        #: "teardown", "memocollect"
        start = time()
        excinfo = None
        try:
>           result = func()

venv/lib/python3.6/site-packages/_pytest/runner.py:220: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
venv/lib/python3.6/site-packages/_pytest/runner.py:192: in <lambda>
    lambda: ihook(item=item, **kwds), when=when, reraise=reraise
venv/lib/python3.6/site-packages/pluggy/hooks.py:289: in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
venv/lib/python3.6/site-packages/pluggy/manager.py:87: in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
venv/lib/python3.6/site-packages/pluggy/manager.py:81: in <lambda>
    firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
venv/lib/python3.6/site-packages/_pytest/runner.py:110: in pytest_runtest_setup
    item.session._setupstate.prepare(item)
venv/lib/python3.6/site-packages/_pytest/runner.py:359: in prepare
    col.setup()
venv/lib/python3.6/site-packages/_pytest/python.py:1455: in setup
    fixtures.fillfixtures(self)
venv/lib/python3.6/site-packages/_pytest/fixtures.py:288: in fillfixtures
    request._fillfixtures()
venv/lib/python3.6/site-packages/_pytest/fixtures.py:461: in _fillfixtures
    item.funcargs[argname] = self.getfixturevalue(argname)
venv/lib/python3.6/site-packages/_pytest/fixtures.py:471: in getfixturevalue
    return self._get_active_fixturedef(argname).cached_result[0]
venv/lib/python3.6/site-packages/_pytest/fixtures.py:494: in _get_active_fixturedef
    self._compute_fixture_value(fixturedef)
venv/lib/python3.6/site-packages/_pytest/fixtures.py:575: in _compute_fixture_value
    fixturedef.execute(request=subrequest)
venv/lib/python3.6/site-packages/_pytest/fixtures.py:883: in execute
    return hook.pytest_fixture_setup(fixturedef=self, request=request)
venv/lib/python3.6/site-packages/pluggy/hooks.py:289: in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
venv/lib/python3.6/site-packages/pluggy/manager.py:87: in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
venv/lib/python3.6/site-packages/pluggy/manager.py:81: in <lambda>
    firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
venv/lib/python3.6/site-packages/_pytest/fixtures.py:923: in pytest_fixture_setup
    result = call_fixture_func(fixturefunc, request, kwargs)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

fixturefunc = <function test_setup at 0x7f8e17b61f28>, request = <SubRequest 'test_setup' for <Function test_login>>
kwargs = {'request': <SubRequest 'test_setup' for <Function test_login>>}

    def call_fixture_func(fixturefunc, request, kwargs):
        yieldctx = is_generator(fixturefunc)
        if yieldctx:
            it = fixturefunc(**kwargs)
>           res = next(it)
E           StopIteration

venv/lib/python3.6/site-packages/_pytest/fixtures.py:779: StopIteration
______________________________________________________ ERROR at setup of TestLogin.test_logout _______________________________________________________

cls = <class '_pytest.runner.CallInfo'>, func = <function call_runtest_hook.<locals>.<lambda> at 0x7f8e179ba048>, when = 'setup'
reraise = (<class '_pytest.outcomes.Exit'>, <class 'KeyboardInterrupt'>)

    @classmethod
    def from_call(cls, func, when, reraise=None):
        #: context of invocation: one of "setup", "call",
        #: "teardown", "memocollect"
        start = time()
        excinfo = None
        try:
>           result = func()

venv/lib/python3.6/site-packages/_pytest/runner.py:220: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
venv/lib/python3.6/site-packages/_pytest/runner.py:192: in <lambda>
    lambda: ihook(item=item, **kwds), when=when, reraise=reraise
venv/lib/python3.6/site-packages/pluggy/hooks.py:289: in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
venv/lib/python3.6/site-packages/pluggy/manager.py:87: in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
venv/lib/python3.6/site-packages/pluggy/manager.py:81: in <lambda>
    firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
venv/lib/python3.6/site-packages/_pytest/runner.py:110: in pytest_runtest_setup
    item.session._setupstate.prepare(item)
venv/lib/python3.6/site-packages/_pytest/runner.py:359: in prepare
    col.setup()
venv/lib/python3.6/site-packages/_pytest/python.py:1455: in setup
    fixtures.fillfixtures(self)
venv/lib/python3.6/site-packages/_pytest/fixtures.py:288: in fillfixtures
    request._fillfixtures()
venv/lib/python3.6/site-packages/_pytest/fixtures.py:461: in _fillfixtures
    item.funcargs[argname] = self.getfixturevalue(argname)
venv/lib/python3.6/site-packages/_pytest/fixtures.py:471: in getfixturevalue
    return self._get_active_fixturedef(argname).cached_result[0]
venv/lib/python3.6/site-packages/_pytest/fixtures.py:494: in _get_active_fixturedef
    self._compute_fixture_value(fixturedef)
venv/lib/python3.6/site-packages/_pytest/fixtures.py:575: in _compute_fixture_value
    fixturedef.execute(request=subrequest)
venv/lib/python3.6/site-packages/_pytest/fixtures.py:874: in execute
    raise val.with_traceback(tb)
venv/lib/python3.6/site-packages/_pytest/fixtures.py:923: in pytest_fixture_setup
    result = call_fixture_func(fixturefunc, request, kwargs)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

fixturefunc = <function test_setup at 0x7f8e17b61f28>, request = <SubRequest 'test_setup' for <Function test_login>>
kwargs = {'request': <SubRequest 'test_setup' for <Function test_login>>}

    def call_fixture_func(fixturefunc, request, kwargs):
        yieldctx = is_generator(fixturefunc)
        if yieldctx:
            it = fixturefunc(**kwargs)
>           res = next(it)
E           StopIteration

venv/lib/python3.6/site-packages/_pytest/fixtures.py:779: StopIteration

the driver could not be instantiated, most probably the line driver = webdriver.Chrome(executable_path="bla") raised an exception. — hoefling
– hoefling, Commented Jul 17, 2019 at 8:09
I have checked if I run python -m pytest --browser firefox it is running perfectly fine, but when I use python -m pytest --browser chrome it gives this error i have checked the imports and spelling those are also correct — Akash
– Akash, Commented Jul 17, 2019 at 9:24

Akash · Accepted Answer · 2019-07-17 09:31:01Z

2

I got the solution it was because of indention only so when I write

import pytest
@pytest.fixture(scope="class")
def test_setup(request):
    from selenium import webdriver

    browser =  request.config.getoption("--browser")
    if browser == "chrome":
        driver = webdriver.Chrome(executable_path="/home/akash/PycharmProjects/AutomationFramework/drivers/chromedriver")     
    request.cls.driver = driver
    yield
    driver.quit()

so in the above statement after line where I am setting up the executable path the next line is for the function which I have created so those statements come under that function and not on if statement that's why it was giving the above saidd error.

answered Jul 17, 2019 at 9:31

Akash

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1 Comment

hoefling Over a year ago

Nice catch! ;-)

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