added class test
added class test


Former-commit-id: a55b6b991468c6631857a95ef655f5c05d4c1eac
Former-commit-id: bceb98c25148146f3dc94adfd9b352a9a9300136
Former-commit-id: 84d8c72aa61209cbae8686b55987a92cd9397df2
dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy