Mercurial > hg
view tests/test-worker.t @ 41506:3e89736b98ce
py3: conditionalize test-demandimport.py for Python 3
The Python 3 lazy importer uses the LazyLoader that is part of
importlib.
On Python 3 and later, LazyLoader is implemented using a custom module
type that defines a __getattribute__ which triggers module loading.
Furthermore, there are additional differences as well. For example,
it appears that Python 3 will return an existing sys.modules
entry instead of constructing a new module object.
This commit adds additional test coverage for lazy importing
behavior to cover the differences between Python 2 and 3. This
reveals that the test and some lazy import functionality is kinda
busted. For example, the test assumes "contextlib" will be lazy.
But in reality an import before it has already imported contextlib!
There's definitely room to improve the behavior of the demand
importer code, both for Python 2 and 3. But at least the test
passes on Python 3 now.
Differential Revision: https://phab.mercurial-scm.org/D5796
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Fri, 01 Feb 2019 16:47:29 -0800 |
parents | 4f0439981a8a |
children | bad59bbd9bec |
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Test UI worker interaction $ cat > t.py <<EOF > from __future__ import absolute_import, print_function > import time > from mercurial import ( > error, > registrar, > ui as uimod, > worker, > ) > def abort(ui, args): > if args[0] == 0: > # by first worker for test stability > raise error.Abort(b'known exception') > return runme(ui, []) > def exc(ui, args): > if args[0] == 0: > # by first worker for test stability > raise Exception('unknown exception') > return runme(ui, []) > def runme(ui, args): > for arg in args: > ui.status(b'run\n') > yield 1, arg > time.sleep(0.1) # easier to trigger killworkers code path > functable = { > b'abort': abort, > b'exc': exc, > b'runme': runme, > } > cmdtable = {} > command = registrar.command(cmdtable) > @command(b'test', [], b'hg test [COST] [FUNC]') > def t(ui, repo, cost=1.0, func=b'runme'): > cost = float(cost) > func = functable[func] > ui.status(b'start\n') > runs = worker.worker(ui, cost, func, (ui,), range(8)) > for n, i in runs: > pass > ui.status(b'done\n') > EOF $ abspath=`pwd`/t.py $ hg init Run tests with worker enable by forcing a heigh cost $ hg --config "extensions.t=$abspath" test 100000.0 start run run run run run run run run done Run tests without worker by forcing a low cost $ hg --config "extensions.t=$abspath" test 0.0000001 start run run run run run run run run done #if no-windows Known exception should be caught, but printed if --traceback is enabled $ hg --config "extensions.t=$abspath" --config 'worker.numcpus=8' \ > test 100000.0 abort 2>&1 start abort: known exception [255] $ hg --config "extensions.t=$abspath" --config 'worker.numcpus=8' \ > test 100000.0 abort --traceback 2>&1 | egrep '^(SystemExit|Abort)' Abort: known exception SystemExit: 255 Traceback must be printed for unknown exceptions $ hg --config "extensions.t=$abspath" --config 'worker.numcpus=8' \ > test 100000.0 exc 2>&1 | grep '^Exception' Exception: unknown exception Workers should not do cleanups in all cases $ cat > $TESTTMP/detectcleanup.py <<EOF > from __future__ import absolute_import > import atexit > import os > import time > oldfork = os.fork > count = 0 > parentpid = os.getpid() > def delayedfork(): > global count > count += 1 > pid = oldfork() > # make it easier to test SIGTERM hitting other workers when they have > # not set up error handling yet. > if count > 1 and pid == 0: > time.sleep(0.1) > return pid > os.fork = delayedfork > def cleanup(): > if os.getpid() != parentpid: > os.write(1, 'should never happen\n') > atexit.register(cleanup) > EOF $ hg --config "extensions.t=$abspath" --config worker.numcpus=8 --config \ > "extensions.d=$TESTTMP/detectcleanup.py" test 100000 abort start abort: known exception [255] #endif