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from __future__ import with_statement
import unittest
import redis
from redis._compat import b
class PipelineTestCase(unittest.TestCase):
def setUp(self):
self.client = redis.Redis(host='localhost', port=6379, db=9)
self.client.flushdb()
def tearDown(self):
self.client.flushdb()
def test_pipeline(self):
with self.client.pipeline() as pipe:
pipe.set('a', 'a1').get('a').zadd('z', z1=1).zadd('z', z2=4)
pipe.zincrby('z', 'z1').zrange('z', 0, 5, withscores=True)
self.assertEquals(
pipe.execute(),
[
True,
b('a1'),
True,
True,
2.0,
[(b('z1'), 2.0), (b('z2'), 4)],
]
)
def test_pipeline_length(self):
with self.client.pipeline() as pipe:
# Initially empty.
self.assertEquals(len(pipe), 0)
self.assertFalse(pipe)
# Fill 'er up!
pipe.set('a', 'a1').set('b', 'b1').set('c', 'c1')
self.assertEquals(len(pipe), 3)
self.assertTrue(pipe)
# Execute calls reset(), so empty once again.
pipe.execute()
self.assertEquals(len(pipe), 0)
self.assertFalse(pipe)
def test_pipeline_no_transaction(self):
with self.client.pipeline(transaction=False) as pipe:
pipe.set('a', 'a1').set('b', 'b1').set('c', 'c1')
self.assertEquals(pipe.execute(), [True, True, True])
self.assertEquals(self.client['a'], b('a1'))
self.assertEquals(self.client['b'], b('b1'))
self.assertEquals(self.client['c'], b('c1'))
def test_pipeline_no_transaction_watch(self):
self.client.set('a', 0)
with self.client.pipeline(transaction=False) as pipe:
pipe.watch('a')
a = pipe.get('a')
pipe.multi()
pipe.set('a', int(a) + 1)
result = pipe.execute()
self.assertEquals(result, [True])
def test_pipeline_no_transaction_watch_failure(self):
self.client.set('a', 0)
with self.client.pipeline(transaction=False) as pipe:
pipe.watch('a')
a = pipe.get('a')
self.client.set('a', 'bad')
pipe.multi()
pipe.set('a', int(a) + 1)
self.assertRaises(redis.WatchError, pipe.execute)
def test_exec_error_in_response(self):
# an invalid pipeline command at exec time adds the exception instance
# to the list of returned values
self.client['c'] = 'a'
with self.client.pipeline() as pipe:
pipe.set('a', 1).set('b', 2).lpush('c', 3).set('d', 4)
result = pipe.execute(raise_on_error=False)
self.assertEquals(result[0], True)
self.assertEquals(self.client['a'], b('1'))
self.assertEquals(result[1], True)
self.assertEquals(self.client['b'], b('2'))
# we can't lpush to a key that's a string value, so this should
# be a ResponseError exception
self.assert_(isinstance(result[2], redis.ResponseError))
self.assertEquals(self.client['c'], b('a'))
self.assertEquals(result[3], True)
self.assertEquals(self.client['d'], b('4'))
# make sure the pipe was restored to a working state
self.assertEquals(pipe.set('z', 'zzz').execute(), [True])
self.assertEquals(self.client['z'], b('zzz'))
def test_exec_error_raised(self):
self.client['c'] = 'a'
with self.client.pipeline() as pipe:
pipe.set('a', 1).set('b', 2).lpush('c', 3).set('d', 4)
self.assertRaises(redis.ResponseError, pipe.execute)
# make sure the pipe was restored to a working state
self.assertEquals(pipe.set('z', 'zzz').execute(), [True])
self.assertEquals(self.client['z'], b('zzz'))
def test_parse_error_raised(self):
with self.client.pipeline() as pipe:
# the zrem is invalid because we don't pass any keys to it
pipe.set('a', 1).zrem('b').set('b', 2)
self.assertRaises(redis.ResponseError, pipe.execute)
# make sure the pipe was restored to a working state
self.assertEquals(pipe.set('z', 'zzz').execute(), [True])
self.assertEquals(self.client['z'], b('zzz'))
def test_watch_succeed(self):
self.client.set('a', 1)
self.client.set('b', 2)
with self.client.pipeline() as pipe:
pipe.watch('a', 'b')
self.assertEquals(pipe.watching, True)
a_value = pipe.get('a')
b_value = pipe.get('b')
self.assertEquals(a_value, b('1'))
self.assertEquals(b_value, b('2'))
pipe.multi()
pipe.set('c', 3)
self.assertEquals(pipe.execute(), [True])
self.assertEquals(pipe.watching, False)
def test_watch_failure(self):
self.client.set('a', 1)
self.client.set('b', 2)
with self.client.pipeline() as pipe:
pipe.watch('a', 'b')
self.client.set('b', 3)
pipe.multi()
pipe.get('a')
self.assertRaises(redis.WatchError, pipe.execute)
self.assertEquals(pipe.watching, False)
def test_unwatch(self):
self.client.set('a', 1)
self.client.set('b', 2)
with self.client.pipeline() as pipe:
pipe.watch('a', 'b')
self.client.set('b', 3)
pipe.unwatch()
self.assertEquals(pipe.watching, False)
pipe.get('a')
self.assertEquals(pipe.execute(), [b('1')])
def test_transaction_callable(self):
self.client.set('a', 1)
self.client.set('b', 2)
has_run = []
def my_transaction(pipe):
a_value = pipe.get('a')
self.assert_(a_value in (b('1'), b('2')))
b_value = pipe.get('b')
self.assertEquals(b_value, b('2'))
# silly run-once code... incr's a so WatchError should be raised
# forcing this all to run again
if not has_run:
self.client.incr('a')
has_run.append('it has')
pipe.multi()
pipe.set('c', int(a_value) + int(b_value))
result = self.client.transaction(my_transaction, 'a', 'b')
self.assertEquals(result, [True])
self.assertEquals(self.client.get('c'), b('4'))
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