/*
    * 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
    *
   *   https://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.commons.compress.compressors.lz4;
  
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.util.Arrays;
  
  import org.junit.jupiter.api.Test;
  
  class FramedLZ4CompressorOutputStreamTest {
  
      @Test
      void testFinishWithNoWrite() throws IOException {
          final ByteArrayOutputStream buffer = new ByteArrayOutputStream();
          try (FramedLZ4CompressorOutputStream compressor = new FramedLZ4CompressorOutputStream(buffer,
                  new FramedLZ4CompressorOutputStream.Parameters(FramedLZ4CompressorOutputStream.BlockSize.K64, true, false, false))) {
              // do nothing here. this will test that flush on close doesn't throw any exceptions if no data is written.
          }
          assertTrue(buffer.size() == 15, "Only the trailer gets written.");
      }
  
      @Test
      void testWriteByteArrayVsWriteByte() throws IOException {
          ByteArrayOutputStream buffer = new ByteArrayOutputStream();
          final byte[] bytes = "abcdefghijklmnop".getBytes();
          try (FramedLZ4CompressorOutputStream compressor = new FramedLZ4CompressorOutputStream(buffer,
                  new FramedLZ4CompressorOutputStream.Parameters(FramedLZ4CompressorOutputStream.BlockSize.K64, true, false, false))) {
              compressor.write(bytes);
              compressor.finish();
              compressor.close();
              assertTrue(compressor.isClosed());
          }
          final byte[] bulkOutput = buffer.toByteArray();
          buffer = new ByteArrayOutputStream();
          try (FramedLZ4CompressorOutputStream compressor = new FramedLZ4CompressorOutputStream(buffer,
                  new FramedLZ4CompressorOutputStream.Parameters(FramedLZ4CompressorOutputStream.BlockSize.K64, true, false, false))) {
              for (final byte element : bytes) {
                  compressor.write(element);
              }
              compressor.finish();
              compressor.close();
              assertTrue(compressor.isClosed());
          }
          assertTrue(Arrays.equals(bulkOutput, buffer.toByteArray()));
      }
  
  }