public class MigrationUtil {

 public static RoomDatabase getDatabaseAfterPerformingMigrations(MigrationTestHelper migrationTestHelper,
  Class databaseClass, String databaseName,
  Migration...migrations) {
  RoomDatabase roomDatabase = Room.databaseBuilder(InstrumentationRegistry.getTargetContext(),
    databaseClass, databaseName)
   .addMigrations(migrations)
   .build();
  migrationTestHelper.closeWhenFinished(roomDatabase);
  return roomDatabase;

 }
}