/*
 * 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 com.carrotsearch.randomizedtesting.annotations.Timeout;
import org.apache.lucene.document.Document;
import org.apache.lucene.store.ByteBuffersDirectory;
import org.apache.lucene.store.Directory;
import org.apache.lucene.tests.util.LuceneTestCase;

public class TestTieredMergePolicySegmentsPerTierNaN extends LuceneTestCase {

  @Timeout(millis = 10_000)
  public void testFlushWithSegmentsPerTierNaN() throws Exception {
    TieredMergePolicy tmp = new TieredMergePolicy();
    try {
      tmp.setSegmentsPerTier(Double.NaN);
    } catch (IllegalArgumentException rejected) {
      return;
    }
    try (Directory dir = new ByteBuffersDirectory();
        IndexWriter w = new IndexWriter(dir, new IndexWriterConfig().setMergePolicy(tmp))) {
      w.addDocument(new Document());
      // expected: NaN rejected or flush() returns; actual: flush() spins forever in findMerges
      w.flush();
    }
  }
}