Flaky reruns tests with failing teardown but test suite is failed

[dimaqq]

flaky re-runs tests that fail in teardown, but test suite result is always ERROR. 🤔

Meanwhile if test fails in the test itself, it is reran, and test suite result is success. 👌

With this example, flaky does the right thing:

# test_a.py
> cat test_a.py
import random
from flaky import flaky


@flaky(max_runs=3)
def test_foo():
    assert random.random() < 0.3

result

> pytest test_a.py -v
========================== test session starts ==========================
platform darwin -- Python 3.7.3, pytest-4.6.5, py-1.8.0, pluggy-0.12.0 -- /.../bin/python
cachedir: .pytest_cache
rootdir: /...
plugins: asyncio-0.10.0, cov-2.7.1, flaky-3.6.1, freezegun-0.3.0.post1
collected 1 item

test_a.py::test_foo PASSED                                        [100%]
===Flaky Test Report===

test_foo failed (2 runs remaining out of 3).
	<class 'AssertionError'>
	assert 0.6181257110745261 < 0.3
 +  where 0.6181257110745261 = <built-in method random of Random object at 0x7fea1e00aa18>()
 +    where <built-in method random of Random object at 0x7fea1e00aa18> = random.random
	[<TracebackEntry /.../test_a.py:7>]
test_foo failed (1 runs remaining out of 3).
	<class 'AssertionError'>
	assert 0.6575059088357618 < 0.3
 +  where 0.6575059088357618 = <built-in method random of Random object at 0x7fea1e00aa18>()
 +    where <built-in method random of Random object at 0x7fea1e00aa18> = random.random
	[<TracebackEntry /.../test_a.py:7>]
test_foo passed 1 out of the required 1 times. Success!

===End Flaky Test Report===

======================= 1 passed in 0.04 seconds ========================

And with this example, the result is weird:

# test_b.py
import random
import pytest
from flaky import flaky


@pytest.fixture
def foobar():
    # no setup
    yield 42
    assert random.random() < 0.3


@flaky(max_runs=3)
def test_foo(foobar):
    pass

result

> pytest test_b.py
========================== test session starts ==========================
platform darwin -- Python 3.7.3, pytest-4.6.5, py-1.8.0, pluggy-0.12.0
rootdir: /...
plugins: asyncio-0.10.0, cov-2.7.1, flaky-3.6.1, freezegun-0.3.0.post1
collected 1 item

test_b.py .E                                                      [100%]

================================ ERRORS =================================
_____________________ ERROR at teardown of test_foo _____________________

    @pytest.fixture
    def foobar():
        # no setup
        yield 42
>       assert random.random() < 0.3
E       assert 0.7628703616086037 < 0.3
E        +  where 0.7628703616086037 = <built-in method random of Random object at 0x7fda9300aa18>()
E        +    where <built-in method random of Random object at 0x7fda9300aa18> = random.random

test_b.py:10: AssertionError
===Flaky Test Report===

test_foo passed 1 out of the required 1 times. Success!

===End Flaky Test Report===
=================== 1 passed, 1 error in 0.06 seconds ===================

Might be related to #135 but this is more specific and concise.

[dimaqq]

Perhaps the behaviour is deliberate: https://github.com/box/flaky/blob/1845780c937f2154aa21ce5e03937faa7b7d16e9/flaky/flaky_pytest_plugin.py#L133-L134

[zdelagrange]

just wondering if anyone worked around this or has a working fork for rerunning tests that fail in setup and/or teardown

[dimaqq]

We've stopped using flaky and just re-run pytest --lf a few times to catch flaky tests.