When using @pytest.mark.parametrize('arg', param) is there a way to find out if the last item in param is being run? The reason I'm asking is I want to run a cleanup function unique to that test that should only run after the very last iteration of param.
param = [(1, 'James'), (2, 'John')]
@pytest.mark.parametrize('id, user', param)
def test_myfunc(id, user):
# Do something
print(user)
# Run this only after the last param which would be after (2, 'John')
print('All done!')
I can run a conditional which checks for the value of param but I was just wondering if pytest has a way for this.
You'll need to perform this logic within a pytest hook, specifically the pytest_runtest_teardown hook.
Assuming your test looks like the following,
import pytest
param = [(1, 'James'), (2, 'John')]
@pytest.mark.parametrize('id, user', param)
def test_myfunc(id, user):
print(f"Iteration number {id}")
In the root of your test folder, create a conftest.py file and place the following,
func_of_interest = "test_myfunc"
def pytest_runtest_teardown(item, nextitem):
curr_name = item.function.__qualname__
# check to see it is the function we want
if curr_name == func_of_interest:
# check to see if there are any more functions after this one
if nextitem is not None:
next_name = nextitem.function.__qualname__
else:
next_name = "random_name"
# check to see if the next item is a different function
if curr_name != next_name:
print("\nPerform some teardown once")
Then when we run it, it produces the following output,
===================================== test session starts ======================================
platform darwin -- Python 3.9.1, pytest-6.2.2, py-1.10.0, pluggy-0.13.1
cachedir: .pytest_cache
rootdir: ***
collected 2 items
test_grab.py::test_myfunc[1-James] Iteration number 1
PASSED
test_grab.py::test_myfunc[2-John] Iteration number 2
PASSED
Perform some teardown once
As we can see, the teardown logic was called exactly once, after the final iteration of the test call.