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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright 2019 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""lock_machine.py related unit-tests.
MachineManagerTest tests MachineManager.
"""
__author__ = "asharif@google.com (Ahmad Sharif)"
from multiprocessing import Process
import time
import unittest
import file_lock_machine
def LockAndSleep(machine):
file_lock_machine.Machine(machine, "/tmp", auto=True).Lock(exclusive=True)
time.sleep(1)
class MachineTest(unittest.TestCase):
"""Class for testing machine locking."""
def setUp(self):
pass
def testRepeatedUnlock(self):
mach = file_lock_machine.Machine("qqqraymes.mtv", "/tmp")
for _ in range(10):
self.assertTrue(mach.Unlock())
mach = file_lock_machine.Machine("qqqraymes.mtv", "/tmp", auto=True)
for _ in range(10):
self.assertTrue(mach.Unlock())
def testLockUnlock(self):
mach = file_lock_machine.Machine("otter.mtv", "/tmp")
for _ in range(10):
self.assertTrue(mach.Lock(exclusive=True))
self.assertTrue(mach.Unlock(exclusive=True))
mach = file_lock_machine.Machine("otter.mtv", "/tmp", True)
for _ in range(10):
self.assertTrue(mach.Lock(exclusive=True))
self.assertTrue(mach.Unlock(exclusive=True))
def testSharedLock(self):
mach = file_lock_machine.Machine("chrotomation.mtv", "/tmp")
for _ in range(10):
self.assertTrue(mach.Lock(exclusive=False))
for _ in range(10):
self.assertTrue(mach.Unlock(exclusive=False))
self.assertTrue(mach.Lock(exclusive=True))
self.assertTrue(mach.Unlock(exclusive=True))
mach = file_lock_machine.Machine("chrotomation.mtv", "/tmp", auto=True)
for _ in range(10):
self.assertTrue(mach.Lock(exclusive=False))
for _ in range(10):
self.assertTrue(mach.Unlock(exclusive=False))
self.assertTrue(mach.Lock(exclusive=True))
self.assertTrue(mach.Unlock(exclusive=True))
def testExclusiveLock(self):
mach = file_lock_machine.Machine("atree.mtv", "/tmp")
self.assertTrue(mach.Lock(exclusive=True))
for _ in range(10):
self.assertFalse(mach.Lock(exclusive=True))
self.assertFalse(mach.Lock(exclusive=False))
self.assertTrue(mach.Unlock(exclusive=True))
mach = file_lock_machine.Machine("atree.mtv", "/tmp", auto=True)
self.assertTrue(mach.Lock(exclusive=True))
for _ in range(10):
self.assertFalse(mach.Lock(exclusive=True))
self.assertFalse(mach.Lock(exclusive=False))
self.assertTrue(mach.Unlock(exclusive=True))
def testExclusiveState(self):
mach = file_lock_machine.Machine("testExclusiveState", "/tmp")
self.assertTrue(mach.Lock(exclusive=True))
for _ in range(10):
self.assertFalse(mach.Lock(exclusive=False))
self.assertTrue(mach.Unlock(exclusive=True))
mach = file_lock_machine.Machine(
"testExclusiveState", "/tmp", auto=True
)
self.assertTrue(mach.Lock(exclusive=True))
for _ in range(10):
self.assertFalse(mach.Lock(exclusive=False))
self.assertTrue(mach.Unlock(exclusive=True))
def testAutoLockGone(self):
mach = file_lock_machine.Machine("lockgone", "/tmp", auto=True)
p = Process(target=LockAndSleep, args=("lockgone",))
p.start()
time.sleep(1.1)
p.join()
self.assertTrue(mach.Lock(exclusive=True))
def testAutoLockFromOther(self):
mach = file_lock_machine.Machine("other_lock", "/tmp", auto=True)
p = Process(target=LockAndSleep, args=("other_lock",))
p.start()
time.sleep(0.5)
self.assertFalse(mach.Lock(exclusive=True))
p.join()
time.sleep(0.6)
self.assertTrue(mach.Lock(exclusive=True))
def testUnlockByOthers(self):
mach = file_lock_machine.Machine("other_unlock", "/tmp", auto=True)
p = Process(target=LockAndSleep, args=("other_unlock",))
p.start()
time.sleep(0.5)
self.assertTrue(mach.Unlock(exclusive=True))
self.assertTrue(mach.Lock(exclusive=True))
if __name__ == "__main__":
unittest.main()
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