HashDataTest.java

/*
Copyright 2011, Lightbox Technologies, Inc

Licensed 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 com.lightboxtechnologies.nsrl;

import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;

import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.binary.Hex;

/**
 * @author Joel Uckelman
 */
public class HashDataTest {
  private static final Hex hex = new Hex();

  private static final String name = "c'est ne pas un name";
  private static final long size = 42;
  private static final int prod_code = 13;
  private static final String os_code = "89";
  private static final String special_code = "so fucking special";

  private static byte[] sha1;
  private static byte[] md5;
  private static byte[] crc32;

  @BeforeClass
  public static void init() throws DecoderException {
    sha1  = (byte[]) hex.decode("deadbeefdeadbeefdeadbeefdeadbeefdeadbeef");
    md5   = (byte[]) hex.decode("deadbeefdeadbeefdeadbeefdeadbeef");
    crc32 = (byte[]) hex.decode("deadbeef");
  }

  @Test
  public void equalsSelf() {
    final HashData hd = new HashData(
      sha1, md5, crc32, name, size, prod_code, os_code, special_code);

    assertTrue(hd.equals(hd));
  }

  @Test
  public void equalsSame() {
    final HashData a = new HashData(
      sha1, md5, crc32, name, size, prod_code, os_code, special_code);
    final HashData b = new HashData(
      sha1, md5, crc32, name, size, prod_code, os_code, special_code);

    assertTrue(a.equals(b));
    assertTrue(b.equals(a));
  }

  @Test
  public void notEqualsNull() {
    final HashData hd = new HashData(
      sha1, md5, crc32, name, size, prod_code, os_code, special_code);

    assertFalse(hd.equals(null));
  }

  @Test
  public void notEqualsOtherType() {
    final HashData hd = new HashData(
      sha1, md5, crc32, name, size, prod_code, os_code, special_code);

    assertFalse(hd.equals("bogus"));
    assertFalse("bogus".equals(hd));
  }

  @Test
  public void notEqualsOtherDifferentProdCode() {
    final HashData a = new HashData(
      sha1, md5, crc32, name, size, prod_code, os_code, special_code);
    final HashData b = new HashData(
      sha1, md5, crc32, name, size, prod_code+1, os_code, special_code);

    assertFalse(a.equals(b));
    assertFalse(b.equals(a));
  }

  @Test(expected=IllegalArgumentException.class)
  public void nullSHA1() {
    new HashData(null, new byte[16], new byte[4], "", 0, 0, "", "");
  }

  @Test(expected=IllegalArgumentException.class)
  public void badSHA1() {
    new HashData(new byte[0], new byte[16], new byte[4], "", 0, 0, "", "");
  }

  @Test(expected=IllegalArgumentException.class)
  public void nullMD5() {
    new HashData(new byte[20], null, new byte[4], "", 0, 0, "", "");
  }

  @Test(expected=IllegalArgumentException.class)
  public void badMD5() {
    new HashData(new byte[20], new byte[0], new byte[4], "", 0, 0, "", "");
  }

  @Test(expected=IllegalArgumentException.class)
  public void nullCRC32() {
    new HashData(new byte[20], new byte[16], null, "", 0, 0, "", "");
  }

  @Test(expected=IllegalArgumentException.class)
  public void badCRC32() {
    new HashData(new byte[20], new byte[16], new byte[0], "", 0, 0, "", "");
  }

  @Test(expected=IllegalArgumentException.class)
  public void nullName() {
    new HashData(new byte[20], new byte[16], new byte[4], null, 0, 0, "", "");
  }

  @Test(expected=IllegalArgumentException.class)
  public void negativeSize() {
    new HashData(new byte[20], new byte[16], new byte[4], "", -1, 0, "", "");
  }

  @Test(expected=IllegalArgumentException.class)
  public void negativeProdCode() {
    new HashData(new byte[20], new byte[16], new byte[4], "", 0, -1, "", "");
  }

  @Test(expected=IllegalArgumentException.class)
  public void nullOSCode() {
    new HashData(new byte[20], new byte[16], new byte[4], "", 0, 0, null, "");
  }

  @Test(expected=IllegalArgumentException.class)
  public void nullSpecialCode() {
    new HashData(new byte[20], new byte[16], new byte[4], "", 0, 0, "", null);
  }

  @Test
  public void hashCodeSelf() {
    final HashData hd = new HashData(
      sha1, md5, crc32, name, size, prod_code, os_code, special_code);

    assertTrue(hd.hashCode() == hd.hashCode());
  }

  @Test
  public void hashCodeSame() {
    final HashData a = new HashData(
      sha1, md5, crc32, name, size, prod_code, os_code, special_code);
    final HashData b = new HashData(
      sha1, md5, crc32, name, size, prod_code, os_code, special_code);

    assertTrue(a.hashCode() == b.hashCode());
  }

  @Test
  public void hashCodeDifferent() throws DecoderException {
    final byte[] sha1alt =
      (byte[]) hex.decode("0000000000000000000000000000000000000000");

    final HashData a = new HashData(
      sha1, md5, crc32, name, size, prod_code, os_code, special_code);
    final HashData b = new HashData(
      sha1alt, md5, crc32, name, size, prod_code, os_code, special_code);

    assertTrue(a.hashCode() != b.hashCode());
  }
}