### Question:
DecisionStorageEngine extends CommonsStorageEngine<IStratioStreamingAPI> { @Override protected void truncate(TableName tableName, Connection<IStratioStreamingAPI> connection) throws UnsupportedException, ExecutionException { throw new UnsupportedException("Truncate is not supported"); } DecisionStorageEngine(ConnectionHandler connectionHandler);   }### Answer:
@Test(expected = UnsupportedException.class) public void truncateTest() throws Exception { decisionStorageEngine.truncate(Matchers.any(TableName.class), connection); }