Pytest - no tests ran

Question

I'm using pytest and selenium. When I try run my test script:

import pytest
from selenium import webdriver
from pages import *
from locators import *
from selenium.webdriver.common.by import By
import time

class RegisterNewInstructor:
    def setup_class(cls):
        cls.driver = webdriver.Firefox()
        cls.driver.get("http://mytest.com")

    def test_01_clickBecomeTopButtom(self):
        page = HomePage(self.driver)
        page.click_become_top_button()
        self.assertTrue(page.check_instructor_form_page_loaded())

    def teardown_class(cls):
        cls.driver.close()

The message shown is: no tests ran in 0.84 seconds

Could someone help me run this simple test?

score 30 · Accepted Answer · edited Oct 12 '21 at 15:21

30

According to the pytest test conventions, your class should start with Test to be automatically picked up by the test discovery mechanism. Call it TestRegisterNewInstructor instead.

Or, subclass the unittest.TestCase:

import unittest

class RegisterNewInstructor(unittest.TestCase):
    # ...

Also keep in mind that the .py test script itself must begin with test_ or end with _test in its filename.

edited Oct 12 '21 at 15:21

Al Sweigart

11,566
10
64
92

answered Dec 18 '15 at 20:40

alecxe

462,703
120
1,088
1,195

1

I'm not sure as to why this answer has had upvotes and is accepted. OP's post was about the `pytest` library, not `unittest`. Maybe I'm wrong. Are they both related under the bonnet? @alecxe @AlSweigart @RafaelC. – StressedBoi69420 Oct 05 '21 at 09:41
Pytest will also include a class's methods to test if they subclass unittest.TestCase. I believe this is to make it cross-compatible to ease migration from one to the other. – Al Sweigart Oct 12 '21 at 15:19

score 26 · Answer 2 · answered May 08 '20 at 15:51

26

As simple as it looks:

Make sure that your file name matches the pattern: test_*.py or *_test.py.
Make sure that your function name starts with the test prefix.

Find more about the pytest conventions here.

answered May 08 '20 at 15:51

Nikolay Kulachenko

4,604
4
31
37

score 1 · Answer 3 · answered Jun 05 '19 at 16:24

1

try add @classmethod on the top of setUP and tearDown.

answered Jun 05 '19 at 16:24

Chien Huang

11
1

score 0 · Answer 4 · answered Dec 18 '15 at 20:27

Did you execute the class itself?
I don't see in this code you are showing that you call the class or definitions to run.
For example, in python you run a class or definition like this:

class Hello():
    # __init__ is a definition runs itself. 
    def __init__(self): 
        print('Hello there')
        # Call another definition. 
        self.andBye()

    # This definition should be calles in order to be executed. 
    def andBye(self):
        print('Goodbye')

# Run class 
Hello()

Actually, `pytest` has automatic test discovery. – alecxe Dec 18 '15 at 20:33 — alecxe, Dec 18 '15 at 20:33

score 0 · Answer 5 · answered Mar 30 '23 at 21:08

0

If you use conda environment, don't forget to activate it!

answered Mar 30 '23 at 21:08

natielle

380
3
14

score 0 · Answer 6 · answered Jun 19 '23 at 03:25

0

I found my problem in the pytest.ini file where I had pyton_files = tests_*.py. Removed the 's' and everything worked smoothly.

answered Jun 19 '23 at 03:25

Serawit

1

Super Kai - Kazuya Ito · Answer 7 · 2023-08-08T16:37:14.020

I got the same message as shown below

$ pytest -q -rP

no tests ran in 0.10s

Because even though my test file name is my_test_ex1.py in my_tests/ as shown below:

django-project
 |-core
 |  └-settings.py
 |-my_app1
 |-my_app2
 |-my_tests
 |  |-__init__.py
 |  └-my_test_ex1.py # Here
 |-pytest.ini
 ...

I set test_*.py to python_files in pytest.ini as shown below:

# "pytest.ini"

[pytest]
DJANGO_SETTINGS_MODULE = core.settings
python_files = test_*.py # Here

So, I set my_test_*.py to python_files as shown below, then I could run the tests in my_test_ex1.py:

# "pytest.ini"

[pytest]
DJANGO_SETTINGS_MODULE = core.settings
python_files = my_test_*.py # Here

In addition, test_*.py and *_test.py are searched by default, if you don't set python_files in pytest.ini as shown below:

# "pytest.ini"

[pytest]
DJANGO_SETTINGS_MODULE = core.settings
# python_files = my_test_*.py
# `test_*.py` and `*_test.py` are searched

Pytest - no tests ran

7 Answers7

Linked