Pytests doesn't collect tests from local directory

Question

I've been looking all over the internet for an answer. They all tell me to make sure I do exactly what you can see I did below. I'm actually making this all during an online class in Pytest and it just doesn't work.

ls
TestCheckout.py  __init__.py    __pycache__   pytest.ini

cat TestCheckout.py 
def test_ConInstantiateCheckout():
    co = CheckOut()

pytest
=================================================== test session starts ====================================================
platform darwin -- Python 3.7.4, pytest-5.2.0, py-1.8.0, pluggy-0.13.0
rootdir: /Users/ddow/dev/supermarket-kata
collected 0 items                                                                                                          

================================================== no tests ran in 0.01s

Does anyone know what gives? Any help would be greatly appreciated.

yeniv · Accepted Answer · 2019-10-03 04:16:21Z

pytest follows a test discovery procedure. You can check the details here.

For your particular case, the file name should start with test_ or end with _test.py. So renaming TestCheckout.py to test_Checkout.py would work. In case, you do not wish to change the name, you could provide the filename explicitly as in

user@qt01:~/folder$ pytest TestCheckout.py
============================================== test session starts ==============================================
platform linux -- Python 3.5.2, pytest-5.1.2, py-1.8.0, pluggy-0.12.0
sensitiveurl: .*
rootdir: /home/user/folder
plugins: needle-0.3.11, selenium-1.17.0, html-1.21.1, repeat-0.8.0, metadata-1.8.0, celery-4.3.0, base-url-1.4.1, variables-1.7.1
collected 1 item

TestCheckout.py .                                                                                         [100%]

=============================================== 1 passed in 0.03s ===============================================
user@qt01:~/folder$

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