HashCodeTest.java

/*
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package org.jcoderz.commons.util;

import java.util.Collections;
import junit.framework.TestCase;

/**
 * JUnit tests for class {@link org.jcoderz.commons.util.HashCode}.
 *
 * @author Michael Griffel
 */
public class HashCodeTest
      extends TestCase
{
   /**
    * Tests the method {@link org.jcoderz.commons.util.HashCode#toInt()}.
    */
   public void testToInt ()
   {
      final HashCode hashCode = new HashCode();
      hashCode.hash(Constants.BITS_PER_INTEGER);
      hashCode.hash("string");
      assertEquals("toInt should not modify the hashCode",
            hashCode.toInt(), hashCode.toInt());
   }

   /**
    * Tests the method {@link org.jcoderz.commons.util.HashCode#toInt()}.
    */
   public void testToIntInitialValue ()
   {
      final HashCode hashCode = new HashCode();
      assertEquals("toInt should be initialized to an initial prime number",
            HashCodeUtil.SEED, hashCode.toInt());

   }

   /**
    * Tests the method {@link org.jcoderz.commons.util.HashCode#hash(boolean)}.
    * Tests the method {@link org.jcoderz.commons.util.HashCode#hash(char)}.
    * Tests the method {@link org.jcoderz.commons.util.HashCode#hash(double)}.
    * Tests the method {@link org.jcoderz.commons.util.HashCode#hash(float)}.
    * Tests the method {@link org.jcoderz.commons.util.HashCode#hash(int)}.
    * Tests the method {@link org.jcoderz.commons.util.HashCode#hash(Object)}.
    */
   public void testHash ()
   {
      final HashCode hashCode = new HashCode();
      hashCode.hash(true);
      hashCode.hash('?');
      hashCode.hash(Math.PI);
      hashCode.hash(Float.POSITIVE_INFINITY);
      hashCode.hash(0);
      hashCode.hash(Byte.MAX_VALUE);
      hashCode.hash(Character.MAX_VALUE);
      hashCode.hash("foo");
      hashCode.hash(null);
      hashCode.hash(0L);
      hashCode.hash(Collections.EMPTY_LIST.toArray());
      hashCode.hash(Collections.singletonList("foo").toArray());
   }

}