October 14, 2021

166: unittest expectedFailure and xfail

7 minutes

xfail isn't just for pytest tests. Python's unittest has @unittest.expectedFailure.

In this episode, we cover:

using @unittest.expectedFailure
the results of passing and failing tests with expectedFailure
using pytest as a test runner for unittest
using pytest markers on unittest tests

Docs for expectedFailure:
https://docs.python.org/3/library/unittest.html#skipping-tests-and-expected-failures

Some sample code.
unittest only:

import unittest

class ExpectedFailureTestCase(unittest.TestCase):

@unittest.expectedFailure

def test_fail(self):

self.assertEqual(1, 0, "broken")

@unittest.expectedFailure

def test_pass(self):

self.assertEqual(1, 1, "not broken")

unittest with pytest markers:

import unittest

import pytest

class ExpectedFailureTestCase(unittest.TestCase):

@pytest.mark.xfail

def test_fail(self):

self.assertEqual(1, 0, "broken")

@pytest.mark.xfail

def test_pass(self):

self.assertEqual(1, 1, "not broken")

Help support the show AND learn pytest:

The Complete pytest course is now a bundle, with each part available separately.
- pytest Primary Power teaches the super powers of pytest that you need to learn to use pytest effectively.
- Using pytest with Projects has lots of "when you need it" sections like debugging failed tests, mocking, testing strategy, and CI
- Then pytest Booster Rockets can help with advanced parametrization and building plugins.
Whether you need to get started with pytest today, or want to power up your pytest skills, PythonTest has a course for you.

★ Support this podcast on Patreon ★

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By Brian Okken

4.7

7070 ratings

October 14, 2021

166: unittest expectedFailure and xfail

7 minutes

xfail isn't just for pytest tests. Python's unittest has @unittest.expectedFailure.

In this episode, we cover:

using @unittest.expectedFailure
the results of passing and failing tests with expectedFailure
using pytest as a test runner for unittest
using pytest markers on unittest tests

Docs for expectedFailure:
https://docs.python.org/3/library/unittest.html#skipping-tests-and-expected-failures

Some sample code.
unittest only:

import unittest

class ExpectedFailureTestCase(unittest.TestCase):

@unittest.expectedFailure

def test_fail(self):

self.assertEqual(1, 0, "broken")

@unittest.expectedFailure

def test_pass(self):

self.assertEqual(1, 1, "not broken")

unittest with pytest markers:

import unittest

import pytest

class ExpectedFailureTestCase(unittest.TestCase):

@pytest.mark.xfail

def test_fail(self):

self.assertEqual(1, 0, "broken")

@pytest.mark.xfail

def test_pass(self):

self.assertEqual(1, 1, "not broken")

Help support the show AND learn pytest:

The Complete pytest course is now a bundle, with each part available separately.
- pytest Primary Power teaches the super powers of pytest that you need to learn to use pytest effectively.
- Using pytest with Projects has lots of "when you need it" sections like debugging failed tests, mocking, testing strategy, and CI
- Then pytest Booster Rockets can help with advanced parametrization and building plugins.
Whether you need to get started with pytest today, or want to power up your pytest skills, PythonTest has a course for you.

★ Support this podcast on Patreon ★

...more