CODEWITHSUNDEEP
pythonunit-testingtestingpytest
Timur Nurlygayanov
Timur Nurlygayanov

Reputation: 1245

pytest doesn't run any test

pytest doesn't run any tests and it is not clear why. I tried to use --debug but didn't get any valuable information. It is completely not clear how to debug this sort of issues with pytest. (Looks like some issue with pytest configuration / env variables / test names patterns?)

Example of test file:

import pytest

@pytest.mark.sanity
def test_me():
    """I'm a test."""

    assert True

But pytest doesn't run any test, why?

$ pytest
================================================== test session starts ===================================================
platform linux2 -- Python 2.7.12, pytest-3.1.3, py-1.4.34, pluggy-0.4.0
rootdir: /home/qawizard/pytest-hell, inifile:
plugins: xdist-1.15.0, timeout-1.2.0
collected 1 item s

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Exit: Done! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
============================================== no tests ran in 0.13 seconds ==============================================

Upvotes: 18

Views: 40077

Answers (4)

leportella
leportella

Reputation: 53

You need all tests to start with test_ but also you need to tell Pytest exact which files to look for:

# pytest.ini

[pytest]

python_files = tests.py test_*.py

Upvotes: 4

Super Kai - Kazuya Ito
Super Kai - Kazuya Ito

Reputation: 1

For example, there is apples/apple.py as shown below:

project
 |-pytest.ini
 └-apples
    |-__init__.py
    └-apple.py # Here

Then, there is apple(self) in Apple class in apples/apple.py as shown below:

# "apples/apple.py"

import pytest

class Apple:
    def apple(self):
        assert True

Now, with this pytest.ini below, apple(self) cannot be run because by default, Pytest can run the files test_*.py and *_test.py, the classes prefixed with Test and the functions prefixed with test instead of apple.py file, Apple class and apple(self) function according to python_files, python_classes and python_functions and by default, Pytest can run any folders like apples:

# "pytest.ini"

[pytest]

So, with this pytest.ini below, apple(self) can be run:

# "pytest.ini"

[pytest]
python_files = apple.py
python_classes = Apple
python_functions = apple

In addition, by default, you can run all the tests in apples/test_1.py, apples/oranges/test_2.py, bananas/test_1.py and banana/kiwis/test_2.py as shown below because as I said above, by default, Pytest can run any folders like apples, oranges, bananas and kiwis. *My answer explains it:

project
 |-pytest.ini
 |-apples
 |  |-__init__.py
 |  |-test_1.py # Here
 |  └-oranges
 |     |-__init__.py
 |     └-test_2.py # Here
 └-bananas
    |-__init__.py
    |-test_1.py # Here
    └-kiwis
       |-__init__.py
       └-test_2.py Here

Upvotes: 0

Timur Nurlygayanov
Timur Nurlygayanov

Reputation: 1245

To determine why tests are not running, these steps are useful:

  1. Verify that all files with test cases have a 'test_' prefix.
  2. Verify that all test case names also have a 'test_' prefix.
  3. Verify that you have created pytest.ini file in the root directory.
  4. Verify that you have __init__.py file in all directories/sub-directories of the project.

Upvotes: 55

Piakkaa
Piakkaa

Reputation: 818

For me my class name didn't start with test.

my code was

class MainTest:
    ...

    def test_properties(self):
        ...

This wont work because pytest will assume this class shouldn't be included. Changing to this did it for me.

class TestMain:
    ...

    def test_properties(self):
        ...

Upvotes: 2

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