/*
 * 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.codecs.uniformsplit;

import org.apache.lucene.codecs.Codec;
import org.apache.lucene.codecs.PostingsFormat;
import org.apache.lucene.index.BasePostingsFormatTestCase;
import org.apache.lucene.util.TestUtil;
import org.junit.After;
import org.junit.Before;

/**
 * Tests {@link UniformSplitPostingsFormat} with block encoding using ROT13 cypher.
 */
public class TestUniformSplitPostingFormat extends BasePostingsFormatTestCase {

  protected final boolean checkEncoding;
  protected final Codec codec;
  private boolean shouldCheckDecoderWasCalled = true;

  public TestUniformSplitPostingFormat() {
    checkEncoding = random().nextBoolean();
    codec = TestUtil.alwaysPostingsFormat(getPostingsFormat());
  }

  protected PostingsFormat getPostingsFormat() {
    return checkEncoding ? new UniformSplitRot13PostingsFormat()
    : new UniformSplitPostingsFormat(UniformSplitTermsWriter.DEFAULT_TARGET_NUM_BLOCK_LINES, UniformSplitTermsWriter.DEFAULT_DELTA_NUM_LINES,
        null, null, random().nextBoolean());
  }

  @Override
  protected Codec getCodec() {
    return codec;
  }

  @Before
  public void initialize() {
    initializeInner();
  }

  protected void initializeInner() {
    UniformSplitRot13PostingsFormat.resetEncodingFlags();
  }

  @After
  public void checkEncodingCalled() {
    if (checkEncoding) {
      checkEncodingCalledInner();
    }
  }

  protected void checkEncodingCalledInner() {
    assertTrue(UniformSplitRot13PostingsFormat.blocksEncoded);
    assertTrue(UniformSplitRot13PostingsFormat.fieldsMetadataEncoded);
    assertTrue(UniformSplitRot13PostingsFormat.dictionaryEncoded);
    if (shouldCheckDecoderWasCalled) {
      assertTrue(UniformSplitRot13PostingsFormat.decoderCalled);
    }
  }

  @Override
  public void testRandomExceptions() throws Exception {
    shouldCheckDecoderWasCalled = false;
    super.testRandomExceptions();
  }
}