ConnectToTestDB connects to the test database, populates the "dao.DB" member, and runs a schema migration.

CreateFixtures creates a new schema, migrates the schema and adds the required fixtures for the tests.

CreateTestDB creates a test database.

DoneWithFixtures drops the schema and returns the "DB" object back to the "public" schema, in case any other tests need the database in the previous schema.

DropSchema drops the database schema entirely.

MigrateSchema migrates all the models.

UpdateTablesSequences loops over all the tables from the database to update the tables' sequences to the latest id.