263 lines
8.3 KiB
Python
263 lines
8.3 KiB
Python
import os
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import threading
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import shutil
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import lockfile
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class ComplianceTest(object):
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def __init__(self):
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self.saved_class = lockfile.LockFile
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def _testfile(self):
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"""Return platform-appropriate file. Helper for tests."""
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import tempfile
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return os.path.join(tempfile.gettempdir(), 'trash-%s' % os.getpid())
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def setup(self):
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lockfile.LockFile = self.class_to_test
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def teardown(self):
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try:
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tf = self._testfile()
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if os.path.isdir(tf):
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shutil.rmtree(tf)
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elif os.path.isfile(tf):
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os.unlink(tf)
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elif not os.path.exists(tf):
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pass
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else:
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raise SystemError("unrecognized file: %s" % tf)
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finally:
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lockfile.LockFile = self.saved_class
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def _test_acquire_helper(self, tbool):
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# As simple as it gets.
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lock = lockfile.LockFile(self._testfile(), threaded=tbool)
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lock.acquire()
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assert lock.i_am_locking()
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lock.release()
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assert not lock.is_locked()
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# def test_acquire_basic_threaded(self):
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# self._test_acquire_helper(True)
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def test_acquire_basic_unthreaded(self):
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self._test_acquire_helper(False)
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def _test_acquire_no_timeout_helper(self, tbool):
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# No timeout test
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e1, e2 = threading.Event(), threading.Event()
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t = _in_thread(self._lock_wait_unlock, e1, e2)
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e1.wait() # wait for thread t to acquire lock
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lock2 = lockfile.LockFile(self._testfile(), threaded=tbool)
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assert lock2.is_locked()
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if tbool:
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assert not lock2.i_am_locking()
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else:
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assert lock2.i_am_locking()
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try:
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lock2.acquire(timeout=-1)
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except lockfile.AlreadyLocked:
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pass
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else:
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lock2.release()
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raise AssertionError("did not raise AlreadyLocked in"
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" thread %s" %
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threading.current_thread().get_name())
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try:
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lock2.acquire(timeout=0)
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except lockfile.AlreadyLocked:
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pass
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else:
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lock2.release()
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raise AssertionError("did not raise AlreadyLocked in"
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" thread %s" %
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threading.current_thread().get_name())
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e2.set() # tell thread t to release lock
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t.join()
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# def test_acquire_no_timeout_threaded(self):
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# self._test_acquire_no_timeout_helper(True)
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# def test_acquire_no_timeout_unthreaded(self):
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# self._test_acquire_no_timeout_helper(False)
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def _test_acquire_timeout_helper(self, tbool):
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# Timeout test
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e1, e2 = threading.Event(), threading.Event()
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t = _in_thread(self._lock_wait_unlock, e1, e2)
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e1.wait() # wait for thread t to acquire lock
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lock2 = lockfile.LockFile(self._testfile(), threaded=tbool)
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assert lock2.is_locked()
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try:
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lock2.acquire(timeout=0.1)
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except lockfile.LockTimeout:
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pass
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else:
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lock2.release()
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raise AssertionError("did not raise LockTimeout in thread %s" %
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threading.current_thread().get_name())
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e2.set()
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t.join()
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def test_acquire_timeout_threaded(self):
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self._test_acquire_timeout_helper(True)
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def test_acquire_timeout_unthreaded(self):
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self._test_acquire_timeout_helper(False)
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def _test_context_timeout_helper(self, tbool):
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# Timeout test
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e1, e2 = threading.Event(), threading.Event()
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t = _in_thread(self._lock_wait_unlock, e1, e2)
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e1.wait() # wait for thread t to acquire lock
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lock2 = lockfile.LockFile(self._testfile(), threaded=tbool,
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timeout=0.2)
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assert lock2.is_locked()
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try:
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lock2.acquire()
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except lockfile.LockTimeout:
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pass
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else:
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lock2.release()
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raise AssertionError("did not raise LockTimeout in thread %s" %
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threading.current_thread().get_name())
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e2.set()
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t.join()
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def test_context_timeout_unthreaded(self):
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self._test_context_timeout_helper(False)
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def _test_release_basic_helper(self, tbool):
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lock = lockfile.LockFile(self._testfile(), threaded=tbool)
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lock.acquire()
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assert lock.is_locked()
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lock.release()
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assert not lock.is_locked()
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assert not lock.i_am_locking()
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try:
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lock.release()
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except lockfile.NotLocked:
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pass
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except lockfile.NotMyLock:
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raise AssertionError('unexpected exception: %s' %
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lockfile.NotMyLock)
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else:
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raise AssertionError('erroneously unlocked file')
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# def test_release_basic_threaded(self):
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# self._test_release_basic_helper(True)
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def test_release_basic_unthreaded(self):
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self._test_release_basic_helper(False)
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# def test_release_from_thread(self):
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# e1, e2 = threading.Event(), threading.Event()
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# t = _in_thread(self._lock_wait_unlock, e1, e2)
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# e1.wait()
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# lock2 = lockfile.LockFile(self._testfile(), threaded=False)
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# assert not lock2.i_am_locking()
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# try:
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# lock2.release()
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# except lockfile.NotMyLock:
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# pass
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# else:
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# raise AssertionError('erroneously unlocked a file locked'
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# ' by another thread.')
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# e2.set()
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# t.join()
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def _test_is_locked_helper(self, tbool):
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lock = lockfile.LockFile(self._testfile(), threaded=tbool)
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lock.acquire(timeout=2)
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assert lock.is_locked()
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lock.release()
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assert not lock.is_locked(), "still locked after release!"
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# def test_is_locked_threaded(self):
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# self._test_is_locked_helper(True)
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def test_is_locked_unthreaded(self):
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self._test_is_locked_helper(False)
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# def test_i_am_locking_threaded(self):
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# self._test_i_am_locking_helper(True)
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def test_i_am_locking_unthreaded(self):
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self._test_i_am_locking_helper(False)
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def _test_i_am_locking_helper(self, tbool):
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lock1 = lockfile.LockFile(self._testfile(), threaded=tbool)
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assert not lock1.is_locked()
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lock1.acquire()
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try:
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assert lock1.i_am_locking()
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lock2 = lockfile.LockFile(self._testfile(), threaded=tbool)
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assert lock2.is_locked()
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if tbool:
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assert not lock2.i_am_locking()
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finally:
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lock1.release()
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def _test_break_lock_helper(self, tbool):
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lock = lockfile.LockFile(self._testfile(), threaded=tbool)
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lock.acquire()
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assert lock.is_locked()
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lock2 = lockfile.LockFile(self._testfile(), threaded=tbool)
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assert lock2.is_locked()
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lock2.break_lock()
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assert not lock2.is_locked()
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try:
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lock.release()
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except lockfile.NotLocked:
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pass
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else:
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raise AssertionError('break lock failed')
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# def test_break_lock_threaded(self):
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# self._test_break_lock_helper(True)
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def test_break_lock_unthreaded(self):
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self._test_break_lock_helper(False)
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def _lock_wait_unlock(self, event1, event2):
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"""Lock from another thread. Helper for tests."""
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l = lockfile.LockFile(self._testfile())
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l.acquire()
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try:
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event1.set() # we're in,
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event2.wait() # wait for boss's permission to leave
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finally:
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l.release()
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def test_enter(self):
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lock = lockfile.LockFile(self._testfile())
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lock.acquire()
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try:
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assert lock.is_locked(), "Not locked after acquire!"
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finally:
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lock.release()
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assert not lock.is_locked(), "still locked after release!"
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def test_decorator(self):
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@lockfile.locked(self._testfile())
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def func(a, b):
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return a + b
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assert func(4, 3) == 7
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def _in_thread(func, *args, **kwargs):
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"""Execute func(*args, **kwargs) after dt seconds. Helper for tests."""
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def _f():
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func(*args, **kwargs)
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t = threading.Thread(target=_f, name='/*/*')
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t.setDaemon(True)
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t.start()
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return t
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