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import sys, types, weakref
from testlib import config
from testlib.compat import set, _function_named, deque
class ConnectionKiller(object):
def __init__(self):
self.proxy_refs = weakref.WeakKeyDictionary()
def checkout(self, dbapi_con, con_record, con_proxy):
self.proxy_refs[con_proxy] = True
def _apply_all(self, methods):
for rec in self.proxy_refs:
if rec is not None and rec.is_valid:
try:
for name in methods:
if callable(name):
name(rec)
else:
getattr(rec, name)()
except (SystemExit, KeyboardInterrupt):
raise
except Exception, e:
# fixme
sys.stderr.write("\n" + str(e) + "\n")
def rollback_all(self):
self._apply_all(('rollback',))
def close_all(self):
self._apply_all(('rollback', 'close'))
def assert_all_closed(self):
for rec in self.proxy_refs:
if rec.is_valid:
assert False
testing_reaper = ConnectionKiller()
def assert_conns_closed(fn):
def decorated(*args, **kw):
try:
fn(*args, **kw)
finally:
testing_reaper.assert_all_closed()
return _function_named(decorated, fn.__name__)
def rollback_open_connections(fn):
"""Decorator that rolls back all open connections after fn execution."""
def decorated(*args, **kw):
try:
fn(*args, **kw)
finally:
testing_reaper.rollback_all()
return _function_named(decorated, fn.__name__)
def close_open_connections(fn):
"""Decorator that closes all connections after fn execution."""
def decorated(*args, **kw):
try:
fn(*args, **kw)
finally:
testing_reaper.close_all()
return _function_named(decorated, fn.__name__)
class ReconnectFixture(object):
def __init__(self, dbapi):
self.dbapi = dbapi
self.connections = []
def __getattr__(self, key):
return getattr(self.dbapi, key)
def connect(self, *args, **kwargs):
conn = self.dbapi.connect(*args, **kwargs)
self.connections.append(conn)
return conn
def shutdown(self):
for c in list(self.connections):
c.close()
self.connections = []
def reconnecting_engine(url=None, options=None):
url = url or config.db_url
dbapi = config.db.dialect.dbapi
engine = testing_engine(url, {'module':ReconnectFixture(dbapi)})
engine.test_shutdown = engine.dialect.dbapi.shutdown
return engine
def testing_engine(url=None, options=None):
"""Produce an engine configured by --options with optional overrides."""
from sqlalchemy import create_engine
from testlib.testing import ExecutionContextWrapper
url = url or config.db_url
options = options or config.db_opts
listeners = options.setdefault('listeners', [])
listeners.append(testing_reaper)
engine = create_engine(url, **options)
create_context = engine.dialect.create_execution_context
def create_exec_context(*args, **kwargs):
return ExecutionContextWrapper(create_context(*args, **kwargs))
engine.dialect.create_execution_context = create_exec_context
return engine
def utf8_engine(url=None, options=None):
"""Hook for dialects or drivers that don't handle utf8 by default."""
from sqlalchemy.engine import url as engine_url
if config.db.name == 'mysql':
dbapi_ver = config.db.dialect.dbapi.version_info
if (dbapi_ver < (1, 2, 1) or
dbapi_ver in ((1, 2, 1, 'gamma', 1), (1, 2, 1, 'gamma', 2),
(1, 2, 1, 'gamma', 3), (1, 2, 1, 'gamma', 5))):
raise RuntimeError('Character set support unavailable with this '
'driver version: %s' % repr(dbapi_ver))
else:
url = url or config.db_url
url = engine_url.make_url(url)
url.query['charset'] = 'utf8'
url.query['use_unicode'] = '0'
url = str(url)
return testing_engine(url, options)
def mock_engine(db=None):
"""Provides a mocking engine based on the current testing.db."""
from sqlalchemy import create_engine
dbi = db or config.db
buffer = []
def executor(sql, *a, **kw):
buffer.append(sql)
engine = create_engine(dbi.name + '://',
strategy='mock', executor=executor)
assert not hasattr(engine, 'mock')
engine.mock = buffer
return engine
class ReplayableSession(object):
"""A simple record/playback tool.
This is *not* a mock testing class. It only records a session for later
playback and makes no assertions on call consistency whatsoever. It's
unlikely to be suitable for anything other than DB-API recording.
"""
Callable = object()
NoAttribute = object()
Natives = set([getattr(types, t)
for t in dir(types) if not t.startswith('_')]). \
difference([getattr(types, t)
for t in ('FunctionType', 'BuiltinFunctionType',
'MethodType', 'BuiltinMethodType',
'LambdaType', 'UnboundMethodType',)])
def __init__(self):
self.buffer = deque()
def recorder(self, base):
return self.Recorder(self.buffer, base)
def player(self):
return self.Player(self.buffer)
class Recorder(object):
def __init__(self, buffer, subject):
self._buffer = buffer
self._subject = subject
def __call__(self, *args, **kw):
subject, buffer = [object.__getattribute__(self, x)
for x in ('_subject', '_buffer')]
result = subject(*args, **kw)
if type(result) not in ReplayableSession.Natives:
buffer.append(ReplayableSession.Callable)
return type(self)(buffer, result)
else:
buffer.append(result)
return result
def __getattribute__(self, key):
try:
return object.__getattribute__(self, key)
except AttributeError:
pass
subject, buffer = [object.__getattribute__(self, x)
for x in ('_subject', '_buffer')]
try:
result = type(subject).__getattribute__(subject, key)
except AttributeError:
buffer.append(ReplayableSession.NoAttribute)
raise
else:
if type(result) not in ReplayableSession.Natives:
buffer.append(ReplayableSession.Callable)
return type(self)(buffer, result)
else:
buffer.append(result)
return result
class Player(object):
def __init__(self, buffer):
self._buffer = buffer
def __call__(self, *args, **kw):
buffer = object.__getattribute__(self, '_buffer')
result = buffer.popleft()
if result is ReplayableSession.Callable:
return self
else:
return result
def __getattribute__(self, key):
try:
return object.__getattribute__(self, key)
except AttributeError:
pass
buffer = object.__getattribute__(self, '_buffer')
result = buffer.popleft()
if result is ReplayableSession.Callable:
return self
elif result is ReplayableSession.NoAttribute:
raise AttributeError(key)
else:
return result
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