/*
 * 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 org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.NumericDocValuesField;
import org.apache.lucene.document.StringField;
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 TestTryUpdateDocValueAfterBufferedUpdate extends LuceneTestCase {

  public void testLaterTryUpdateDocValueWins() throws Exception {
    IndexWriterConfig iwc = new IndexWriterConfig().setCodec(TestUtil.getDefaultCodec());
    try (Directory dir = new ByteBuffersDirectory();
        IndexWriter w = new IndexWriter(dir, iwc)) {
      Document doc = new Document();
      doc.add(new StringField("id", "1", Field.Store.NO));
      doc.add(new NumericDocValuesField("n", 1));
      w.addDocument(doc);
      try (DirectoryReader r = DirectoryReader.open(w)) {
        w.updateNumericDocValue(new Term("id", "1"), "n", 2);
        assertNotEquals(-1, w.tryUpdateDocValue(r, 0, new NumericDocValuesField("n", 3)));
      }
      try (DirectoryReader r = DirectoryReader.open(w)) {
        NumericDocValues n = r.leaves().get(0).reader().getNumericDocValues("n");
        assertTrue(n.advanceExact(0));
        // expected 3 (the later tryUpdateDocValue); actual 2 (the earlier, still buffered update)
        assertEquals(3, n.longValue());
      }
    }
  }
}