/*
 * 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.queries.mlt;

import java.io.StringReader;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.store.ByteBuffersDirectory;
import org.apache.lucene.tests.util.LuceneTestCase;

public class TestMoreLikeThisInterestingTermsLargeMaxQueryTerms extends LuceneTestCase {

  public void testUnboundedMaxQueryTerms() throws Exception {
    try (StandardAnalyzer analyzer = new StandardAnalyzer();
        ByteBuffersDirectory dir = new ByteBuffersDirectory();
        IndexWriter w = new IndexWriter(dir, new IndexWriterConfig(analyzer))) {
      Document doc = new Document();
      doc.add(new TextField("text", "lucene", Field.Store.NO));
      w.addDocument(doc);
      try (DirectoryReader reader = DirectoryReader.open(w)) {
        MoreLikeThis mlt = new MoreLikeThis(reader);
        mlt.setAnalyzer(analyzer);
        mlt.setMinTermFreq(1);
        mlt.setMinDocFreq(1);
        mlt.setMaxQueryTerms(Integer.MAX_VALUE);
        // expected [lucene]; actual OutOfMemoryError from new ArrayList<>(maxQueryTerms)
        assertArrayEquals(
            new String[] {"lucene"},
            mlt.retrieveInterestingTerms(new StringReader("lucene"), "text"));
      }
    }
  }
}