/*
    *  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.zip;
  
  import java.math.BigInteger;
  
  import junit.framework.TestCase;
  
  /**
   * JUnit 3 testcases for org.apache.commons.compress.archivers.zip.ZipEightByteInteger.
   *
   */
  public class ZipEightByteIntegerTest extends TestCase {
  
      public ZipEightByteIntegerTest(String name) {
          super(name);
      }
  
      /**
       * Test conversion to bytes.
       */
      public void testLongToBytes() {
          ZipEightByteInteger zl = new ZipEightByteInteger(0xAB12345678l);
          byte[] result = zl.getBytes();
          assertEquals("length getBytes", 8, result.length);
          assertEquals("first byte getBytes", 0x78, result[0]);
          assertEquals("second byte getBytes", 0x56, result[1]);
          assertEquals("third byte getBytes", 0x34, result[2]);
          assertEquals("fourth byte getBytes", 0x12, result[3]);
          assertEquals("fifth byte getBytes", (byte) 0xAB, result[4]);
          assertEquals("sixth byte getBytes", 0, result[5]);
          assertEquals("seventh byte getBytes", 0, result[6]);
          assertEquals("eighth byte getBytes", 0, result[7]);
      }
  
      /**
       * Test conversion from bytes.
       */
      public void testLongFromBytes() {
          byte[] val = new byte[] {0x78, 0x56, 0x34, 0x12, (byte) 0xAB, 0x00, 0x00, 0x00};
          ZipEightByteInteger zl = new ZipEightByteInteger(val);
          assertEquals("longValue from bytes", 0xAB12345678l, zl.getLongValue());
      }
  
      /**
       * Test conversion to bytes.
       */
      public void testBIToBytes() {
          ZipEightByteInteger zl =
              new ZipEightByteInteger(BigInteger.valueOf(Long.MAX_VALUE)
                                      .shiftLeft(1));
          byte[] result = zl.getBytes();
          assertEquals("length getBytes", 8, result.length);
          assertEquals("first byte getBytes", (byte) 0xFE, result[0]);
          assertEquals("second byte getBytes", (byte) 0xFF, result[1]);
          assertEquals("third byte getBytes", (byte) 0xFF, result[2]);
          assertEquals("fourth byte getBytes", (byte) 0xFF, result[3]);
          assertEquals("fifth byte getBytes", (byte) 0xFF, result[4]);
          assertEquals("sixth byte getBytes", (byte) 0xFF, result[5]);
          assertEquals("seventh byte getBytes", (byte) 0xFF, result[6]);
          assertEquals("eighth byte getBytes", (byte) 0xFF, result[7]);
      }
  
      /**
       * Test conversion from bytes.
       */
      public void testBIFromBytes() {
          byte[] val = new byte[] {(byte) 0xFE, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF};
          ZipEightByteInteger zl = new ZipEightByteInteger(val);
          assertEquals("value from bytes",
                       BigInteger.valueOf(Long.MAX_VALUE).shiftLeft(1),
                       zl.getValue());
      }
  
      /**
       * Test the contract of the equals method.
       */
      public void testEquals() {
          ZipEightByteInteger zl = new ZipEightByteInteger(0x12345678);
          ZipEightByteInteger zl2 = new ZipEightByteInteger(0x12345678);
          ZipEightByteInteger zl3 = new ZipEightByteInteger(0x87654321);
  
          assertTrue("reflexive", zl.equals(zl));
 
         assertTrue("works", zl.equals(zl2));
         assertTrue("works, part two", !zl.equals(zl3));
 
         assertTrue("symmetric", zl2.equals(zl));
 
         assertTrue("null handling", !zl.equals(null));
         assertTrue("non ZipEightByteInteger handling", !zl.equals(new Integer(0x1234)));
     }
 
     /**
      * Test sign handling.
      */
     public void testSign() {
         ZipEightByteInteger zl = new ZipEightByteInteger(new byte[] {(byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF});
         assertEquals(BigInteger.valueOf(Long.MAX_VALUE).shiftLeft(1).setBit(0),
                      zl.getValue());
     }
 }