147 lines
4.5 KiB
Python
147 lines
4.5 KiB
Python
from base import Base
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from pathed import Pathed
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from sqlalchemy import create_engine, Table, MetaData
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from sqlalchemy.orm import create_session
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from pkg_resources import resource_stream
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import os
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def readurls():
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filename='test_db.cfg'
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fullpath = os.path.join(os.curdir,filename)
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ret=[]
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tmpfile=Pathed.tmp()
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try:
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fd=open(fullpath)
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except IOError:
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print "You must specify the databases to use for testing!"
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tmplfile = "%s.tmpl"%filename
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print "Copy %s.tmpl to %s and edit your database URLs."%(tmplfile,filename)
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raise
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#fd = resource_stream('__main__',filename)
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for line in fd:
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if line.startswith('#'):
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continue
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line=line.replace('__tmp__',tmpfile).strip()
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ret.append(line)
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fd.close()
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return ret
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def is_supported(url,supported,not_supported):
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db = url.split(':',1)[0]
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if supported is not None:
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if isinstance(supported,basestring):
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supported = (supported,)
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ret = db in supported
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elif not_supported is not None:
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if isinstance(not_supported,basestring):
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not_supported = (not_supported,)
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ret = not (db in not_supported)
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else:
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ret = True
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return ret
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#we make the engines global, which should make the tests run a bit faster
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urls = readurls()
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engines=dict([(url,create_engine(url)) for url in urls])
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def usedb(supported=None,not_supported=None):
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"""Decorates tests to be run with a database connection
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These tests are run once for each available database
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@param supported: run tests for ONLY these databases
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@param not_supported: run tests for all databases EXCEPT these
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If both supported and not_supported are empty, all dbs are assumed
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to be supported
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"""
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if supported is not None and not_supported is not None:
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msg = "Can't specify both supported and not_supported in fixture.db()"
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assert False, msg
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my_urls = [url for url in urls if is_supported(url,supported,not_supported)]
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def dec(func):
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def entangle(self):
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for url in my_urls:
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self._setup(url)
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yield func, self
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self._teardown()
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entangle.__name__ = func.__name__
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return entangle
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return dec
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class DB(Base):
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# Constants: connection level
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NONE=0 # No connection; just set self.url
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CONNECT=1 # Connect; no transaction
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TXN=2 # Everything in a transaction
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level=TXN
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def shortDescription(self,*p,**k):
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"""List database connection info with description of the test"""
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ret = super(DB,self).shortDescription(*p,**k) or str(self)
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engine = self._engineInfo()
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if engine is not None:
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ret = "(%s) %s"%(engine,ret)
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return ret
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def _engineInfo(self,url=None):
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if url is None:
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url=self.url
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return url
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def _setup(self, url):
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self._connect(url)
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def _teardown(self):
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self._disconnect()
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def _connect(self,url):
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self.url = url
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self.engine = engines[url]
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self.meta = MetaData(bind=self.engine)
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if self.level < self.CONNECT:
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return
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#self.conn = self.engine.connect()
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self.session = create_session(bind=self.engine)
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if self.level < self.TXN:
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return
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self.txn = self.session.begin()
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#self.txn.add(self.engine)
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def _disconnect(self):
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if hasattr(self,'txn'):
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self.txn.rollback()
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if hasattr(self,'session'):
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self.session.close()
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#if hasattr(self,'conn'):
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# self.conn.close()
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def _supported(self,url):
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db = url.split(':',1)[0]
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func = getattr(self,self._TestCase__testMethodName)
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if hasattr(func,'supported'):
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return db in func.supported
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if hasattr(func,'not_supported'):
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return not (db in func.not_supported)
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# Neither list assigned; assume all are supported
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return True
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def _not_supported(self,url):
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return not self._supported(url)
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def refresh_table(self,name=None):
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"""Reload the table from the database
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Assumes we're working with only a single table, self.table, and
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metadata self.meta
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Working w/ multiple tables is not possible, as tables can only be
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reloaded with meta.clear()
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"""
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if name is None:
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name = self.table.name
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self.meta.clear()
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self.table = Table(name,self.meta,autoload=True)
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