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from __future__ import with_statement
import pytest
import redis
from redis._compat import b, u, unichr, unicode
class TestPipeline(object):
def test_pipeline(self, r):
with r.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)
assert pipe.execute() == \
[
True,
b('a1'),
True,
True,
2.0,
[(b('z1'), 2.0), (b('z2'), 4)],
]
def test_pipeline_length(self, r):
with r.pipeline() as pipe:
# Initially empty.
assert len(pipe) == 0
assert not pipe
# Fill 'er up!
pipe.set('a', 'a1').set('b', 'b1').set('c', 'c1')
assert len(pipe) == 3
assert pipe
# Execute calls reset(), so empty once again.
pipe.execute()
assert len(pipe) == 0
assert not pipe
def test_pipeline_no_transaction(self, r):
with r.pipeline(transaction=False) as pipe:
pipe.set('a', 'a1').set('b', 'b1').set('c', 'c1')
assert pipe.execute() == [True, True, True]
assert r['a'] == b('a1')
assert r['b'] == b('b1')
assert r['c'] == b('c1')
def test_pipeline_no_transaction_watch(self, r):
r['a'] = 0
with r.pipeline(transaction=False) as pipe:
pipe.watch('a')
a = pipe.get('a')
pipe.multi()
pipe.set('a', int(a) + 1)
assert pipe.execute() == [True]
def test_pipeline_no_transaction_watch_failure(self, r):
r['a'] = 0
with r.pipeline(transaction=False) as pipe:
pipe.watch('a')
a = pipe.get('a')
r['a'] = 'bad'
pipe.multi()
pipe.set('a', int(a) + 1)
with pytest.raises(redis.WatchError):
pipe.execute()
assert r['a'] == b('bad')
def test_exec_error_in_response(self, r):
"""
an invalid pipeline command at exec time adds the exception instance
to the list of returned values
"""
r['c'] = 'a'
with r.pipeline() as pipe:
pipe.set('a', 1).set('b', 2).lpush('c', 3).set('d', 4)
result = pipe.execute(raise_on_error=False)
assert result[0]
assert r['a'] == b('1')
assert result[1]
assert r['b'] == b('2')
# we can't lpush to a key that's a string value, so this should
# be a ResponseError exception
assert isinstance(result[2], redis.ResponseError)
assert r['c'] == b('a')
# since this isn't a transaction, the other commands after the
# error are still executed
assert result[3]
assert r['d'] == b('4')
# make sure the pipe was restored to a working state
assert pipe.set('z', 'zzz').execute() == [True]
assert r['z'] == b('zzz')
def test_exec_error_raised(self, r):
r['c'] = 'a'
with r.pipeline() as pipe:
pipe.set('a', 1).set('b', 2).lpush('c', 3).set('d', 4)
with pytest.raises(redis.ResponseError) as ex:
pipe.execute()
assert unicode(ex.value).startswith('Command # 3 (LPUSH c 3) of '
'pipeline caused error: ')
# make sure the pipe was restored to a working state
assert pipe.set('z', 'zzz').execute() == [True]
assert r['z'] == b('zzz')
def test_parse_error_raised(self, r):
with r.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)
with pytest.raises(redis.ResponseError) as ex:
pipe.execute()
assert unicode(ex.value).startswith('Command # 2 (ZREM b) of '
'pipeline caused error: ')
# make sure the pipe was restored to a working state
assert pipe.set('z', 'zzz').execute() == [True]
assert r['z'] == b('zzz')
def test_watch_succeed(self, r):
r['a'] = 1
r['b'] = 2
with r.pipeline() as pipe:
pipe.watch('a', 'b')
assert pipe.watching
a_value = pipe.get('a')
b_value = pipe.get('b')
assert a_value == b('1')
assert b_value == b('2')
pipe.multi()
pipe.set('c', 3)
assert pipe.execute() == [True]
assert not pipe.watching
def test_watch_failure(self, r):
r['a'] = 1
r['b'] = 2
with r.pipeline() as pipe:
pipe.watch('a', 'b')
r['b'] = 3
pipe.multi()
pipe.get('a')
with pytest.raises(redis.WatchError):
pipe.execute()
assert not pipe.watching
def test_unwatch(self, r):
r['a'] = 1
r['b'] = 2
with r.pipeline() as pipe:
pipe.watch('a', 'b')
r['b'] = 3
pipe.unwatch()
assert not pipe.watching
pipe.get('a')
assert pipe.execute() == [b('1')]
def test_transaction_callable(self, r):
r['a'] = 1
r['b'] = 2
has_run = []
def my_transaction(pipe):
a_value = pipe.get('a')
assert a_value in (b('1'), b('2'))
b_value = pipe.get('b')
assert b_value == b('2')
# silly run-once code... incr's "a" so WatchError should be raised
# forcing this all to run again. this should incr "a" once to "2"
if not has_run:
r.incr('a')
has_run.append('it has')
pipe.multi()
pipe.set('c', int(a_value) + int(b_value))
result = r.transaction(my_transaction, 'a', 'b')
assert result == [True]
assert r['c'] == b('4')
def test_exec_error_in_no_transaction_pipeline(self, r):
r['a'] = 1
with r.pipeline(transaction=False) as pipe:
pipe.llen('a')
pipe.expire('a', 100)
with pytest.raises(redis.ResponseError) as ex:
pipe.execute()
assert unicode(ex.value).startswith('Command # 1 (LLEN a) of '
'pipeline caused error: ')
assert r['a'] == b('1')
def test_exec_error_in_no_transaction_pipeline_unicode_command(self, r):
key = unichr(3456) + u('abcd') + unichr(3421)
r[key] = 1
with r.pipeline(transaction=False) as pipe:
pipe.llen(key)
pipe.expire(key, 100)
with pytest.raises(redis.ResponseError) as ex:
pipe.execute()
expected = unicode('Command # 1 (LLEN %s) of pipeline caused '
'error: ') % key
assert unicode(ex.value).startswith(expected)
assert r[key] == b('1')
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