Using LoadableFixtureを読む A DataSet class is loaded via some storage medium, say, an object that implements a Data Mapper or Active Record pattern. A Fixture is an environment that knows how to load data using the right objects. Behind the scenes the rows and columns of the DataSet are simply passed to the storage medium so that it can save the data. DataSetクラスはなんらかの格納媒体(以下ORMapper)例えばDataMapperやAc