mirror of
https://github.com/avatao-content/baseimage-tutorial-framework
synced 2024-11-15 04:07:17 +00:00
70 lines
1.8 KiB
Python
70 lines
1.8 KiB
Python
# pylint: disable=redefined-outer-name
|
|
from dataclasses import dataclass
|
|
from textwrap import dedent
|
|
from os import mkfifo
|
|
from os.path import join
|
|
from signal import SIGINT
|
|
from subprocess import DEVNULL, Popen, PIPE
|
|
from tempfile import TemporaryDirectory
|
|
|
|
import pytest
|
|
|
|
from .ref_counter import RefCounter
|
|
|
|
|
|
@dataclass
|
|
class CounterContext:
|
|
lockpath: str
|
|
pipepath: str
|
|
|
|
@property
|
|
def source(self):
|
|
return dedent(f'''\
|
|
from time import sleep
|
|
from atexit import register
|
|
from ref_counter import RefCounter
|
|
|
|
counter = RefCounter('{self.lockpath}')
|
|
register(counter.teardown_instance)
|
|
print(flush=True)
|
|
while True:
|
|
sleep(1)
|
|
''')
|
|
|
|
|
|
@pytest.fixture
|
|
def context():
|
|
with TemporaryDirectory() as workdir:
|
|
pipepath = join(workdir, 'test.pipe')
|
|
mkfifo(pipepath)
|
|
yield CounterContext(join(workdir, 'test.lock'), pipepath)
|
|
|
|
def test_increment_decrement(context):
|
|
counter, processes = 0, []
|
|
for _ in range(5):
|
|
new_proc = Popen(['python3', '-c', context.source], stdout=PIPE, stderr=DEVNULL)
|
|
new_proc.stdout.readline()
|
|
processes.append(new_proc)
|
|
counter += 1
|
|
for proc in processes:
|
|
with open(context.lockpath, 'r') as lock:
|
|
assert lock.read() == str(counter)
|
|
counter -= 1
|
|
proc.send_signal(SIGINT)
|
|
proc.wait()
|
|
|
|
def test_deallocate(context):
|
|
state = False
|
|
def trigger():
|
|
nonlocal state
|
|
state = True
|
|
refcounters = []
|
|
for _ in range(32):
|
|
new_refc = RefCounter(context.lockpath)
|
|
new_refc.deallocate = trigger
|
|
refcounters.append(new_refc)
|
|
for refc in refcounters:
|
|
assert not state
|
|
refc.teardown_instance()
|
|
assert state
|