/*
 * 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.io.IOException;

import org.apache.lucene.index.MergePolicy.MergeSpecification;

public class TestUpgradeIndexMergePolicy extends BaseMergePolicyTestCase {

  public MergePolicy mergePolicy() {
    return new UpgradeIndexMergePolicy(newMergePolicy(random()));
  }

  @Override
  protected void assertSegmentInfos(MergePolicy policy, SegmentInfos infos) throws IOException {
    // no-op
  }

  @Override
  protected void assertMerge(MergePolicy policy, MergeSpecification merge) throws IOException {
    // no-op
  }

}

@@ -920,16 +920,56 @@
 ication;
+%0Aimport org.apache.lucene.util.TestUtil;
 %0A%0Apublic
@@ -1083,67 +1083,347 @@
     
-return new UpgradeIndexMergePolicy(newMergePolicy(random())
+MergePolicy in = newMergePolicy(random());%0A    if (in instanceof TieredMergePolicy) %7B%0A      // Avoid low values of the max merged segment size which prevent this merge policy from scaling well%0A      ((TieredMergePolicy) in).setMaxMergedSegmentMB(TestUtil.nextInt(random(), 1024, 10 * 1024));%0A    %7D%0A    return new UpgradeIndexMergePolicy(in
 );%0A 

Make TestUpgradeIndexMergePolicy faster when merging a TieredMergePolicy.