/*
 * 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.StringField;
import org.apache.lucene.store.ByteBuffersDirectory;
import org.apache.lucene.store.Directory;
import org.apache.lucene.tests.util.LuceneTestCase;

public class TestAddIndexesDeletedDocsLimit extends LuceneTestCase {

  public void testOnlyLiveDocsCountTowardsLimit() throws Exception {
    try (Directory src = new ByteBuffersDirectory();
        Directory dst = new ByteBuffersDirectory()) {
      try (IndexWriter w =
          new IndexWriter(src, new IndexWriterConfig().setMergePolicy(NoMergePolicy.INSTANCE))) {
        w.addDocument(List.of(new StringField("id", "deleted", Field.Store.NO)));
        w.addDocument(List.of(new StringField("id", "live", Field.Store.NO)));
        w.commit();
        w.addDocument(List.of(new StringField("id", "live", Field.Store.NO)));
        w.deleteDocuments(new Term("id", "deleted"));
      }
      try (DirectoryReader r = DirectoryReader.open(src);
          IndexWriter w =
              new IndexWriter(
                  dst, new IndexWriterConfig().setMergeScheduler(new SerialMergeScheduler()))) {
        setIndexWriterMaxDocs(2);
        try {
          w.addIndexes(
              (CodecReader) r.leaves().get(0).reader(), (CodecReader) r.leaves().get(1).reader());
        } catch (IllegalArgumentException e) {
          fail("expected: 2 live docs added under a limit of 2; actual: " + e.getMessage());
        } finally {
          restoreIndexWriterMaxDocs();
        }
        assertEquals(2, w.getDocStats().numDocs);
      }
    }
  }
}