75 lines
2.4 KiB
Python
75 lines
2.4 KiB
Python
from __future__ import unicode_literals
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import time
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from django.test import TestCase
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from django.utils.module_loading import import_string
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from ..exceptions import LockError
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TEST_LOCK_1 = 'test lock 1'
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class FileLockTestCase(TestCase):
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backend_string = 'lock_manager.backends.file_lock.FileLock'
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def setUp(self):
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self.locking_backend = import_string(self.backend_string)
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def test_exclusive(self):
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lock_1 = self.locking_backend.acquire_lock(name=TEST_LOCK_1)
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with self.assertRaises(LockError):
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self.locking_backend.acquire_lock(name=TEST_LOCK_1)
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# Cleanup
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lock_1.release()
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def test_release(self):
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lock_1 = self.locking_backend.acquire_lock(name=TEST_LOCK_1)
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lock_1.release()
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lock_2 = self.locking_backend.acquire_lock(name=TEST_LOCK_1)
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# Cleanup
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lock_2.release()
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def test_timeout_expired(self):
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self.locking_backend.acquire_lock(name=TEST_LOCK_1, timeout=1)
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# lock_1 not release and not expired, should raise LockError
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with self.assertRaises(LockError):
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self.locking_backend.acquire_lock(name=TEST_LOCK_1)
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time.sleep(1.01)
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# lock_1 not release but has expired, should not raise LockError
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lock_2 = self.locking_backend.acquire_lock(name=TEST_LOCK_1)
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# Cleanup
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lock_2.release()
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def test_double_release(self):
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lock_1 = self.locking_backend.acquire_lock(name=TEST_LOCK_1)
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lock_1.release()
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def test_release_expired(self):
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lock_1 = self.locking_backend.acquire_lock(name=TEST_LOCK_1, timeout=1)
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time.sleep(1.01)
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lock_1.release()
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# No exception is raised even though the lock has expired.
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# The logic is that checking for expired locks during release is
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# not necesary as any attempt by someone else to aquire the lock
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# would be successfull, even after an extended lapse of time
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def test_release_expired_reaquired(self):
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self.locking_backend.acquire_lock(name=TEST_LOCK_1, timeout=1)
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time.sleep(1.01)
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# TEST_LOCK_1 is expired so trying to acquire it should not return an
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# error.
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lock_2 = self.locking_backend.acquire_lock(name=TEST_LOCK_1, timeout=1)
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# Cleanup
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lock_2.release()
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class ModelLockTestCase(FileLockTestCase):
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backend_string = 'lock_manager.backends.model_lock.ModelLock'
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