def setUp(self): self.connection = create_engine('sqlite:///:memory:').connect() self.metadata = MetaData(self.connection) self.table = Table('thingy', self.metadata, Column('thingy_id', Integer, primary_key=True)) self.metadata.create_all() self.migration_context = MigrationContext.configure(self.connection) self.op = IdempotentOperations(self.migration_context, self) self.inspector = Inspector(self.connection)