EqualUtilTest.java

/**
 * Licensed to The Apereo Foundation under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 *
 * The Apereo Foundation licenses this file to you under the Educational
 * Community 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://opensource.org/licenses/ecl2.txt
 *
 * 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.opencastproject.util;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.opencastproject.util.EqualsUtil.eqMap;
import static org.opencastproject.util.EqualsUtil.hash;
import static org.opencastproject.util.data.Arrays.array;
import static org.opencastproject.util.data.Collections.map;
import static org.opencastproject.util.data.Tuple.tuple;

import org.junit.Test;

public class EqualUtilTest {
  @Test
  public void testHash() {
    assertEquals(hash("a", "b", "c"), 41 * (41 * (41 + "a".hashCode()) + "b".hashCode()) + "c".hashCode());
    assertEquals(hash("a", null, "c"), 41 * (41 * (41 + "a".hashCode()) + 0L) + "c".hashCode());
    assertEquals(0L, hash());
    assertEquals(0L, hash(null));
  }

  @Test
  public void testEqualMap() {
    assertTrue(eqMap(map(tuple("a", "b")), map(tuple("a", "b"))));
    assertTrue(eqMap(map(tuple("a", map(tuple(1, "bla")))), map(tuple("a", map(tuple(1, "bla"))))));
    // this yields false since Java does not define equality on arrays.
    assertFalse(eqMap(map(tuple(4, array(1, 2, 4))), map(tuple(4, array(1, 2, 4)))));
    assertFalse(eqMap(map(tuple(1, new Object())), map(tuple(1, new Object()))));
    assertFalse(eqMap(map(tuple("a", "b"), tuple("x", "y")), map(tuple("a", "b"), tuple("x", "z"))));
  }
}