/*
    * 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.commons.compress.archivers.cpio;
  
  import static org.junit.jupiter.api.Assertions.assertArrayEquals;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import org.junit.jupiter.api.Test;
  
  public class CpioUtilTest {
  
      @Test
      public void testByteArray2longThrowsUnsupportedOperationException() {
          assertThrows(UnsupportedOperationException.class, () -> CpioUtil.byteArray2long(new byte[1], true));
  
      }
  
      @Test
      public void testLong2byteArrayWithPositiveThrowsUnsupportedOperationException() {
          assertThrows(UnsupportedOperationException.class, () -> CpioUtil.long2byteArray(0L, 1021, false));
      }
  
      @Test
      public void testLong2byteArrayWithZeroThrowsUnsupportedOperationException() {
          assertThrows(UnsupportedOperationException.class, () -> CpioUtil.long2byteArray(0L, 0, false));
      }
  
      @Test
      public void testOldBinMagic2ByteArrayNotSwapped() {
          assertArrayEquals(new byte[] { (byte) 0xc7, 0x71 }, CpioUtil.long2byteArray(CpioConstants.MAGIC_OLD_BINARY, 2, false));
      }
  
      @Test
      public void testOldBinMagic2ByteArraySwapped() {
          assertArrayEquals(new byte[] { 0x71, (byte) 0xc7, }, CpioUtil.long2byteArray(CpioConstants.MAGIC_OLD_BINARY, 2, true));
      }
  
      @Test
      public void testOldBinMagicFromByteArrayNotSwapped() {
          assertEquals(CpioConstants.MAGIC_OLD_BINARY, CpioUtil.byteArray2long(new byte[] { (byte) 0xc7, 0x71 }, false));
      }
  
      @Test
      public void testOldBinMagicFromByteArraySwapped() {
          assertEquals(CpioConstants.MAGIC_OLD_BINARY, CpioUtil.byteArray2long(new byte[] { 0x71, (byte) 0xc7 }, true));
      }
  
  }