/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.lucene.index;

import java.util.List;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.FieldType;
import org.apache.lucene.document.TextField;
import org.apache.lucene.store.ByteBuffersDirectory;
import org.apache.lucene.store.Directory;
import org.apache.lucene.tests.util.LuceneTestCase;
import org.apache.lucene.tests.util.TestUtil;

public class TestTermVectorsRamBytesUsed extends LuceneTestCase {

  public void testBufferedTermVectorPositionsAreCounted() throws Exception {
    // Expected: ramBytesUsed() >= the 3 int[n] buffers (positions, start offsets, lengths);
    // actual: their lengths are counted as bytes.
    int n = 1 << 16;
    FieldType ft = new FieldType(TextField.TYPE_NOT_STORED);
    ft.setStoreTermVectors(true);
    ft.setStoreTermVectorPositions(true);
    ft.setStoreTermVectorOffsets(true);
    try (Directory dir = new ByteBuffersDirectory();
        IndexWriter w =
            new IndexWriter(dir, new IndexWriterConfig().setCodec(TestUtil.getDefaultCodec()))) {
      w.addDocument(List.of(new Field("f", "x ".repeat(n), ft)));
      long buffered = 3L * n * Integer.BYTES;
      assertTrue(w.ramBytesUsed() + " < " + buffered, w.ramBytesUsed() >= buffered);
    }
  }
}