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bpo-22367: Add tests for fcntl.lockf(). (GH-17010)

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Dong-hee Na 2019-11-08 05:31:41 +09:00 • committed by Serhiy Storchaka
parent 6cbc84fb99
commit befa032d88
1 changed files with 28 additions and 1 deletions
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29
Lib/test/test_fcntl.py
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@ -5,6 +5,7 @@
import struct
import sys
import unittest
from multiprocessing import Process
from test.support import (verbose, TESTFN, unlink, run_unittest, import_module,
cpython_only)
@ -12,7 +13,6 @@
fcntl = import_module('fcntl')
# TODO - Write tests for flock() and lockf().
def get_lockdata():
try:
@ -138,6 +138,33 @@ def test_flock(self):
self.assertRaises(ValueError, fcntl.flock, -1, fcntl.LOCK_SH)
self.assertRaises(TypeError, fcntl.flock, 'spam', fcntl.LOCK_SH)
def test_lockf_exclusive(self):
self.f = open(TESTFN, 'wb+')
cmd = fcntl.LOCK_EX | fcntl.LOCK_NB
def try_lockf_on_other_process():
self.assertRaises(BlockingIOError, fcntl.lockf, self.f, cmd)
fcntl.lockf(self.f, cmd)
p = Process(target=try_lockf_on_other_process)
p.start()
p.join()
fcntl.lockf(self.f, fcntl.LOCK_UN)
self.assertEqual(p.exitcode, 0)
def test_lockf_share(self):
self.f = open(TESTFN, 'wb+')
cmd = fcntl.LOCK_SH | fcntl.LOCK_NB
def try_lockf_on_other_process():
fcntl.lockf(self.f, cmd)
fcntl.lockf(self.f, fcntl.LOCK_UN)
fcntl.lockf(self.f, cmd)
p = Process(target=try_lockf_on_other_process)
p.start()
p.join()
fcntl.lockf(self.f, fcntl.LOCK_UN)
self.assertEqual(p.exitcode, 0)
@cpython_only
def test_flock_overflow(self):
import _testcapi