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import etcd
try:
import mock
except ImportError:
from unittest import mock
from etcd.tests.unit import TestClientApiBase
class TestClientLock(TestClientApiBase):
def recursive_read(self):
nodes = [
{"key": "/_locks/test_lock/1", "value": "2qwwwq",
"modifiedIndex":33,"createdIndex":33},
{"key": "/_locks/test_lock/34", "value": self.locker.uuid,
"modifiedIndex":34,"createdIndex":34},
]
d = {
"action": "get",
"node": {"dir": True,
"nodes": [{"key":"/_locks/test_lock", "dir": True,
"nodes": nodes}]}
}
self._mock_api(200, d)
def setUp(self):
super(TestClientLock, self).setUp()
self.locker = etcd.Lock(self.client, 'test_lock')
def test_initialization(self):
"""
Verify the lock gets initialized correctly
"""
self.assertEquals(self.locker.name, u'test_lock')
self.assertEquals(self.locker.path, u'/_locks/test_lock')
self.assertEquals(self.locker.is_taken, False)
def test_acquire(self):
"""
Acquiring a precedingly inexistent lock works.
"""
l = etcd.Lock(self.client, 'test_lock')
l._find_lock = mock.MagicMock(spec=l._find_lock, return_value=False)
l._acquired = mock.MagicMock(spec=l._acquired, return_value=True)
# Mock the write
d = {
u'action': u'set',
u'node': {
u'modifiedIndex': 190,
u'key': u'/_locks/test_lock/1',
u'value': l.uuid
}
}
self._mock_api(200, d)
self.assertEquals(l.acquire(), True)
self.assertEquals(l._sequence, '1')
def test_is_acquired(self):
"""
Test is_acquired
"""
self.locker._sequence = '1'
d = {
u'action': u'get',
u'node': {
u'modifiedIndex': 190,
u'key': u'/_locks/test_lock/1',
u'value': self.locker.uuid
}
}
self._mock_api(200, d)
self.locker.is_taken = True
self.assertEquals(self.locker.is_acquired, True)
def test_is_not_acquired(self):
"""
Test is_acquired failures
"""
self.locker._sequence = '2'
self.locker.is_taken = False
self.assertEquals(self.locker.is_acquired, False)
self.locker.is_taken = True
self._mock_exception(etcd.EtcdKeyNotFound, self.locker.lock_key)
self.assertEquals(self.locker.is_acquired, False)
self.assertEquals(self.locker.is_taken, False)
def test_acquired(self):
"""
Test the acquiring primitives
"""
self.locker._sequence = '4'
retval = ('/_locks/test_lock/4', None)
self.locker._get_locker = mock.MagicMock(
spec=self.locker._get_locker, return_value=retval)
self.assertTrue(self.locker._acquired())
self.assertTrue(self.locker.is_taken)
retval = ('/_locks/test_lock/1', '/_locks/test_lock/4')
self.locker._get_locker = mock.MagicMock(return_value=retval)
self.assertFalse(self.locker._acquired(blocking=False))
self.assertFalse(self.locker.is_taken)
d = {
u'action': u'delete',
u'node': {
u'modifiedIndex': 190,
u'key': u'/_locks/test_lock/1',
u'value': self.locker.uuid
}
}
self._mock_api(200, d)
returns = [('/_locks/test_lock/1', '/_locks/test_lock/4'), ('/_locks/test_lock/4', None)]
def side_effect():
return returns.pop()
self.locker._get_locker = mock.MagicMock(
spec=self.locker._get_locker, side_effect=side_effect)
self.assertTrue(self.locker._acquired())
def test_acquired_no_timeout(self):
self.locker._sequence = 4
returns = [('/_locks/test_lock/4', None), ('/_locks/test_lock/1', '/_locks/test_lock/4')]
def side_effect():
return returns.pop()
d = {
u'action': u'get',
u'node': {
u'modifiedIndex': 190,
u'key': u'/_locks/test_lock/4',
u'value': self.locker.uuid
}
}
self._mock_api(200, d)
self.locker._get_locker = mock.create_autospec(
self.locker._get_locker, side_effect=side_effect)
self.assertTrue(self.locker._acquired())
def test_lock_key(self):
"""
Test responses from the lock_key property
"""
with self.assertRaises(ValueError):
self.locker.lock_key
self.locker._sequence = '5'
self.assertEquals(u'/_locks/test_lock/5',self.locker.lock_key)
def test_set_sequence(self):
self.locker._set_sequence('/_locks/test_lock/10')
self.assertEquals('10', self.locker._sequence)
def test_find_lock(self):
d = {
u'action': u'get',
u'node': {
u'modifiedIndex': 190,
u'key': u'/_locks/test_lock/1',
u'value': self.locker.uuid
}
}
self._mock_api(200, d)
self.locker._sequence = '1'
self.assertTrue(self.locker._find_lock())
# Now let's pretend the lock is not there
self._mock_exception(etcd.EtcdKeyNotFound, self.locker.lock_key)
self.assertFalse(self.locker._find_lock())
self.locker._sequence = None
self.recursive_read()
self.assertTrue(self.locker._find_lock())
self.assertEquals(self.locker._sequence, '34')
def test_get_locker(self):
self.recursive_read()
self.assertEquals((u'/_locks/test_lock/1', u'/_locks/test_lock/1'),
self.locker._get_locker())
with self.assertRaises(etcd.EtcdLockExpired):
self.locker._sequence = '35'
self.locker._get_locker()
def test_release(self):
d = {
u'action': u'delete',
u'node': {
u'modifiedIndex': 190,
u'key': u'/_locks/test_lock/1',
u'value': self.locker.uuid
}
}
self._mock_api(200, d)
self.locker._sequence = 1
self.locker.is_taken = True
self.locker.release()
self.assertFalse(self.locker.is_taken)
|
