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from sqlalchemy.util import decorator
@decorator
def provide_metadata(fn, *args, **kw):
"""Provide bound MetaData for a single test, dropping afterwards."""
from . import config
from sqlalchemy import schema
metadata = schema.MetaData(config.db)
self = args[0]
prev_meta = getattr(self, 'metadata', None)
self.metadata = metadata
try:
return fn(*args, **kw)
finally:
metadata.drop_all()
self.metadata = prev_meta