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pytestrerunfailuresalllogs 10.3.dev0

Contents

pytest-rerunfailures

Requirements
Installation
Recover from hard crashes
Re-run all failures
Re-run all failures matching certain expressions
Re-run all failures other than matching certain expressions
Re-run individual failures
Output
Compatibility
Resources
Development

Changelog

10.3 (unreleased)

Bug fixes
Features

10.2 (2021-09-17)
10.1 (2021-07-02)
10.0 (2021-05-26)

Backwards incompatible changes
Features
Other changes

9.1.1 (2020-09-29)
9.1 (2020-08-26)

Features
Other changes

9.0 (2020-03-18)

Backwards incompatible changes
Features

8.0 (2019-11-18)

Backwards incompatible changes
Features
Bug fixes

7.0 (2019-03-28)

Backwards incompatible changes
Features
Bug fixes

6.0 (2019-01-08)

Backwards incompatible changes
Features
Bug fixes

5.0 (2018-11-06)
4.2 (2018-10-04)
4.1 (2018-05-23)
4.0 (2017-12-23)
3.1 (2017-08-29)
3.0 (2017-08-17)
2.2 (2017-06-23)
2.1.0 (2016-11-01)
2.0.1 (2016-08-10)
2.0.0 (2016-04-06)
1.0.2 (2016-03-29)
1.0.1 (2016-02-02)
1.0.0 (2016-02-02)

pytest-rerunfailures
pytest-rerunfailures is a plugin for pytest that
re-runs tests to eliminate intermittent failures.

Requirements
You will need the following prerequisites in order to use pytest-rerunfailures:

Python 3.6, up to 3.10, or PyPy3
pytest 5.3 or newer

This plugin can recover from a hard crash with the following optional
prerequisites:

pytest-xdist 2.3.0 or newer

This package is currently tested against the last 5 minor pytest releases. In
case you work with an older version of pytest you should consider updating or
use one of the earlier versions of this package.

Installation
To install pytest-rerunfailures:
$ pip install pytest-rerunfailures

Recover from hard crashes
If one or more tests trigger a hard crash (for example: segfault), this plugin
will ordinarily be unable to rerun the test. However, if a compatible version of
pytest-xdist is installed, and the tests are run within pytest-xdist using the -n
flag, this plugin will be able to rerun crashed tests, assuming the workers and
controller are on the same LAN (this assumption is valid for almost all cases
because most of the time the workers and controller are on the same computer).
If this assumption is not the case, then this functionality may not operate.

Re-run all failures
To re-run all test failures, use the --reruns command line option with the
maximum number of times you’d like the tests to run:
$ pytest --reruns 5
Failed fixture or setup_class will also be re-executed.
To add a delay time between re-runs use the --reruns-delay command line
option with the amount of seconds that you would like wait before the next
test re-run is launched:
$ pytest --reruns 5 --reruns-delay 1

Re-run all failures matching certain expressions
To re-run only those failures that match a certain list of expressions, use the
--only-rerun flag and pass it a regular expression. For example,
the following would only rerun those errors that match AssertionError:
$ pytest --reruns 5 --only-rerun AssertionError
Passing the flag multiple times accumulates the arguments, so the following
would only rerun those errors that match AssertionError or ValueError:
$ pytest --reruns 5 --only-rerun AssertionError --only-rerun ValueError

Re-run all failures other than matching certain expressions
To re-run only those failures that do not match a certain list of expressions, use the
--rerun-except flag and pass it a regular expression. For example,
the following would only rerun errors other than that match AssertionError:
$ pytest --reruns 5 --rerun-except AssertionError
Passing the flag multiple times accumulates the arguments, so the following
would only rerun those errors that does not match with AssertionError or OSError:
$ pytest --reruns 5 --rerun-except AssertionError --rerun-except OSError

Re-run individual failures
To mark individual tests as flaky, and have them automatically re-run when they
fail, add the flaky mark with the maximum number of times you’d like the
test to run:
@pytest.mark.flaky(reruns=5)
def test_example():
import random
assert random.choice([True, False])
Note that when teardown fails, two reports are generated for the case, one for
the test case and the other for the teardown error.
You can also specify the re-run delay time in the marker:
@pytest.mark.flaky(reruns=5, reruns_delay=2)
def test_example():
import random
assert random.choice([True, False])
You can also specify an optional condition in the re-run marker:
@pytest.mark.flaky(reruns=5, condition=sys.platform.startswith("win32"))
def test_example():
import random
assert random.choice([True, False])
You can use @pytest.mark.flaky(condition) similarly as @pytest.mark.skipif(condition), see pytest-mark-skipif
@pytest.mark.flaky(reruns=2,condition="sys.platform.startswith('win32')")
def test_example():
import random
assert random.choice([True, False])
# totally same as the above
@pytest.mark.flaky(reruns=2,condition=sys.platform.startswith("win32"))
def test_example():
import random
assert random.choice([True, False])
Note that the test will re-run for any condition that is truthy.

Output
Here’s an example of the output provided by the plugin when run with
--reruns 2 and -r aR:
test_report.py RRF

================================== FAILURES ==================================
__________________________________ test_fail _________________________________

def test_fail():
> assert False
E assert False

test_report.py:9: AssertionError
============================ rerun test summary info =========================
RERUN test_report.py::test_fail
RERUN test_report.py::test_fail
============================ short test summary info =========================
FAIL test_report.py::test_fail
======================= 1 failed, 2 rerun in 0.02 seconds ====================
Note that output will show all re-runs. Tests that fail on all the re-runs will
be marked as failed.

Compatibility

This plugin may not be used with class, module, and package level fixtures.
This plugin is not compatible with pytest-xdist’s –looponfail flag.
This plugin is not compatible with the core –pdb flag.

Resources

Issue Tracker
Code

Development

Test execution count can be retrieved from the execution_count attribute
in test item’s object. Example:
@hookimpl(tryfirst=True)
def pytest_runtest_makereport(item, call):
print(item.execution_count)

Changelog

10.3 (unreleased)

Bug fixes

Fix crash when pytest-xdist is installed but disabled.
(Thanks to @mgorny for the PR.)

Features

Added option –rerun-except to rerun failed tests those are other than the mentioned Error.

10.2 (2021-09-17)
Features

Allow recovery from crashed tests with pytest-xdist.
Add support for Python 3.10 (as of Python 3.10.rc2).
(Thanks to @hugovk for the PR.)

10.1 (2021-07-02)
Features

Allows using a str as condition for
@pytest.mark.flaky(condition)
which gets evaluated dynamically similarly to
@pytest.mark.skipif(condition).
(#162
provided by @15klli)

10.0 (2021-05-26)

Backwards incompatible changes

Drop support for Python 3.5.
Drop support for pytest < 5.3.

Features

Add condition keyword argument to the re-run marker.
(Thanks to @BeyondEvil for the PR.)
Add support for Python 3.9.
(Thanks to @digitronik for the PR.)
Add support for pytest 6.3.
(Thanks to @bluetech for the PR.)
Add compatibility with pytest-xdist >= 2.0.
(Thanks to @bluetech for the PR.)

Other changes

Check for the resultlog by feature and not by version as pytest master does
not provide a consistent version.

9.1.1 (2020-09-29)
Compatibility fix.

Ignore --result-log command line option when used together with pytest >= 6.1.0, as it was removed there. This is a quick fix, use an older
version of pytest, if you want to keep this feature for now.
(Thanks to @ntessore for the PR)
Support up to pytest 6.1.0.

9.1 (2020-08-26)

Features

Add a new flag --only-rerun to allow for users to rerun only certain
errors.

Other changes

Drop dependency on mock.
Add support for pre-commit and add a linting tox target.
(#117)
(PR from @gnikonorov)

9.0 (2020-03-18)

Backwards incompatible changes

Drop support for pytest version 4.4, 4.5 and 4.6.
Drop support for Python 2.7.

Features

Add support for pytest 5.4.
Add support for Python 3.8.

8.0 (2019-11-18)

Backwards incompatible changes

Drop support for pytest version 3.10, 4.0, 4.1, 4.2 and 4.3
Drop support for Python 3.4.

Features

Add support for pytest version 4.4, 4.5, 4.6, 5.0, 5.1 and 5.2.

Bug fixes

Explicitly depend on setuptools to ensure installation when working in
environments without it.
(#98)
(PR from @Eric-Arellano)

7.0 (2019-03-28)

Backwards incompatible changes

Drop support for pytest version 3.8 and 3.9.

Features

Add support for pytest version 4.2 and 4.3.

Bug fixes

Fixed #83 issue about ignored pytest_runtest_logfinish hooks.
(#83)
(PR from @KillAChicken)

6.0 (2019-01-08)

Backwards incompatible changes

Drop support for pytest version 3.6 and 3.7.

Features

Add support for pytest version 4.0 and 4.1.

Bug fixes

Fixed #77 regression issue introduced in 4.2 related to the rerun
attribute on the test report.
(#77)
(Thanks to @RibeiroAna for the PR).

5.0 (2018-11-06)

Drop support for pytest versions < 3.6 to reduce the maintenance burden.
Add support up to pytest version 3.10. Thus supporting the newest 5 pytest
releases.
Add support for Python 3.7.
Fix issue can occur when used together with pytest-flake8
(#73)

4.2 (2018-10-04)

Fixed #64 issue related to setup_class and fixture executions on
rerun (Thanks to @OlegKuzovkov for the PR).
Added new execution_count attribute to reflect the number of test case
executions according to #67 issue. (Thanks to @OlegKuzovkov for the PR).

4.1 (2018-05-23)

Add support for pytest 3.6 by using Node.get_closest_marker() (Thanks to
@The-Compiler for the PR).

4.0 (2017-12-23)

Added option to add a delay time between test re-runs (Thanks to @Kanguros
for the PR).
Added support for pytest >= 3.3.
Drop support for pytest < 2.8.7.

3.1 (2017-08-29)

Restored compatibility with pytest-xdist. (Thanks to @davehunt for the PR)

3.0 (2017-08-17)

Add support for Python 3.6.
Add support for pytest 2.9 up to 3.2
Drop support for Python 2.6 and 3.3.
Drop support for pytest < 2.7.

2.2 (2017-06-23)

Ensure that other plugins can run after this one, in case of a global setting
--rerun=0. (Thanks to @sublee for the PR)

2.1.0 (2016-11-01)

Add default value of reruns=1 if pytest.mark.flaky() is called
without arguments.
Also offer a distribution as universal wheel. (Thanks to @tltx for the PR)

2.0.1 (2016-08-10)

Prepare CLI options to pytest 3.0, to avoid a deprecation warning.
Fix error due to missing CHANGES.rst when creating the source distribution
by adding a MANIFEST.in.

2.0.0 (2016-04-06)

Drop support for Python 3.2, since supporting it became too much of a hassle.
(Reason: Virtualenv 14+ / PIP 8+ do not support Python 3.2 anymore.)

1.0.2 (2016-03-29)

Add support for –resultlog option by parsing reruns accordingly. (#28)

1.0.1 (2016-02-02)

Improve package description and include CHANGELOG into description.

1.0.0 (2016-02-02)

Rewrite to use newer API of pytest >= 2.3.0
Improve support for pytest-xdist by only logging the final result.
(Logging intermediate results will finish the test rather rerunning it.)