Windows fatal exception when running tests

[emanuega]

When I try to run the tests on a fresh install I get a "Windows fatal exception: access violation" error at the first test in test_hal_film.py. Do you know how to resolve this issue?

I've included the output below.

================================================= test session starts =================================================
platform win32 -- Python 3.8.2, pytest-5.4.1, py-1.8.1, pluggy-0.13.1
PyQt5 5.14.1 -- Qt runtime 5.14.1 -- Qt compiled 5.14.1
rootdir: C:\Users\GeorgeEmanuel\code\storm-control
plugins: qt-3.3.0
collected 109 items

sc_hardware\test\test_af_lock_c.py ......... [ 8%]
sc_hardware\test\test_corr_2d_gauss_c.py ..... [ 12%]
sc_hardware\test\test_corr_lock_c2dg.py . [ 13%]
test\test_buffered_1.py .. [ 15%]
test\test_c_libraries.py ... [ 18%]
test\test_corr_lock.py . [ 19%]
test\test_dave_starts.py . [ 20%]
test\test_dave_xml_generators.py . [ 21%]
test\test_hal_error.py .. [ 22%]
test\test_hal_film.py Windows fatal exception: access violation

Current thread 0x00006ee0 (most recent call first):
File "C:\Users\GeorgeEmanuel\code\storm-control\storm_control\test\hal\standardHalTest.py", line 35 in halTest
File "C:\Users\GeorgeEmanuel\code\storm-control\storm_control\test\test_hal_film.py", line 21 in test_hal_film_1
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages_pytest\python.py", line 184 in pytest_pyfunc_call
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\callers.py", line 187 in _multicall
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\manager.py", line 84 in
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\manager.py", line 93 in _hookexec
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\hooks.py", line 286 in call
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages_pytest\python.py", line 1479 in runtest
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages_pytest\runner.py", line 135 in pytest_runtest_call
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\callers.py", line 187 in _multicall
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\manager.py", line 84 in
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\manager.py", line 93 in _hookexec
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\hooks.py", line 286 in call
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages_pytest\runner.py", line 217 in
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages_pytest\runner.py", line 244 in from_call
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages_pytest\runner.py", line 216 in call_runtest_hook
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages_pytest\runner.py", line 186 in call_and_report
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages_pytest\runner.py", line 100 in runtestprotocol
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages_pytest\runner.py", line 85 in pytest_runtest_protocol
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\callers.py", line 187 in _multicall
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\manager.py", line 84 in
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\manager.py", line 93 in _hookexec
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\hooks.py", line 286 in call
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages_pytest\main.py", line 272 in pytest_runtestloop
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\callers.py", line 187 in _multicall
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\manager.py", line 84 in
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\manager.py", line 93 in _hookexec
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\hooks.py", line 286 in call
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages_pytest\main.py", line 247 in _main
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages_pytest\main.py", line 191 in wrap_session
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages_pytest\main.py", line 240 in pytest_cmdline_main
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\callers.py", line 187 in multicall
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\manager.py", line 84 in
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\manager.py", line 93 in hookexec
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages\pluggy\hooks.py", line 286 in call
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\site-packages_pytest\config_init.py", line 124 in main
File "C:\Users\GeorgeEmanuel\Anaconda3\envs\sc_env\Scripts\pytest.exe_main.py", line 7 in
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\runpy.py", line 86 in _run_code
File "c:\users\georgeemanuel\anaconda3\envs\sc_env\lib\runpy.py", line 193 in _run_module_as_main

[HazenBabcock]

Are you running each test in it's process, see storm_control/test/README.txt? This works on linux, but I've never tried it on Windows, if it is even possible.

At various times I've tried to figure out what storm-control was doing that breaks the testing infrastructure but I never made much progress. Simpler PyQt programs that use QThreads, QRunnables, etc.. seem to behave fine even when run multiple times in the same process. This is also why I was never got anywhere with continuous integration.

[emanuega]

Thanks for pointing out the README for the tests. It looks like fork isn't available on windows.

INTERNALERROR> AttributeError: module 'os' has no attribute 'fork'

[HazenBabcock]

Virtualbox :). Anyway, yes the fact that the tests can only be run on linux, each in their own process is bad. Wish I knew what the problem is, but I really have no idea. All I know is that the tests fail on app.exec_(), which isn't really much to go on.