ByteUtilTest.java

/* See LICENSE for licensing and NOTICE for copyright. */
package org.cryptacular.util;

import org.cryptacular.FailListener;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Listeners;
import org.testng.annotations.Test;

import static org.testng.Assert.assertEquals;

/** @author  Middleware Services */
@Listeners(FailListener.class)
public class ByteUtilTest
{
  @DataProvider(name = "integers")
  public Object[][] getIntegers()
  {
    return
      new Object[][] {
        new Object[] {64},
        new Object[] {-89},
        new Object[] {255},
        new Object[] {256},
        new Object[] {210983498},
        new Object[] {-417234198},
      };
  }

  @DataProvider(name = "longs")
  public Object[][] getLongs()
  {
    return new Object[][] {
      new Object[] {128},
      new Object[] {110374187198L},
      new Object[] {-8987189751341L},
    };
  }

  @Test(dataProvider = "integers")
  public void testIntToBytesAndBack(final int value)
    throws Exception
  {
    final byte[] bytes = new byte[4];
    ByteUtil.toBytes(value, bytes, 0);
    assertEquals(ByteUtil.toInt(bytes), value);
  }

  @Test(dataProvider = "longs")
  public void testLongToBytesAndBack(final long value)
    throws Exception
  {
    final byte[] bytes = new byte[8];
    ByteUtil.toBytes(value, bytes, 0);
    assertEquals(ByteUtil.toLong(bytes), value);
  }
}