org.eclipse.tracecompass.tmf.core.tests/src/org/eclipse/tracecompass/tmf/core/tests/util/PairTest.java

   1 /*******************************************************************************
   2  * Copyright (c) 2011, 2015 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *  Bernd Hufmann - Initial design and implementation
  11  *  Alexandre Montplaisir - Port to JUnit4
  12  *******************************************************************************/
  13
  14 package org.eclipse.tracecompass.tmf.core.tests.util;
  15
  16 import static org.junit.Assert.assertEquals;
  17 import static org.junit.Assert.assertTrue;
  18
  19 import org.eclipse.tracecompass.tmf.core.util.Pair;
  20 import org.junit.Test;
  21
  22 /**
  23  * Test case for Pair class.
  24  *
  25  * @author Bernd Hufmann
  26  */
  27 @SuppressWarnings("javadoc")
  28 public class PairTest {
  29
  30     // ------------------------------------------------------------------------
  31     // Field(s)
  32     // ------------------------------------------------------------------------
  33
  34     Pair<String, Long> fPair1 = new Pair<>("String 1", 1L);
  35     Pair<String, Long> fPair2 = new Pair<>("String 2", 2L);
  36
  37     // ------------------------------------------------------------------------
  38     // to String
  39     // ------------------------------------------------------------------------
  40
  41     @Test
  42     public void testToString() {
  43         String result = fPair1.toString();
  44         assertEquals("(String 1, 1)", result);
  45     }
  46
  47     // ------------------------------------------------------------------------
  48     // Setters/Getters
  49     // ------------------------------------------------------------------------
  50
  51     @Test
  52     public void testAccessors() {
  53         Pair<String, Long> myPair = new Pair<>("String 1", 1L);
  54         assertEquals("String 1", myPair.getFirst());
  55         assertEquals(Long.valueOf(1L), myPair.getSecond());
  56     }
  57
  58     // ------------------------------------------------------------------------
  59     // equals
  60     // ------------------------------------------------------------------------
  61
  62     @Test
  63     public void testEqualsReflexivity() {
  64         assertTrue("equals", fPair1.equals(fPair1));
  65         assertTrue("equals", fPair2.equals(fPair2));
  66
  67         assertTrue("equals", !fPair1.equals(fPair2));
  68         assertTrue("equals", !fPair2.equals(fPair1));
  69     }
  70
  71     @Test
  72     public void testEqualsSymmetry() {
  73         Pair<String, Long> info1 = new Pair<>(fPair1.getFirst(), fPair1.getSecond());
  74         Pair<String, Long> info2 = new Pair<>(fPair2.getFirst(), fPair2.getSecond());
  75
  76         assertTrue("equals", info1.equals(fPair1));
  77         assertTrue("equals", fPair1.equals(info1));
  78
  79         assertTrue("equals", info2.equals(fPair2));
  80         assertTrue("equals", fPair2.equals(info2));
  81     }
  82
  83     @Test
  84     public void testEqualsTransivity() {
  85         Pair<String, Long> info1 = new Pair<>(fPair1.getFirst(), fPair1.getSecond());
  86         Pair<String, Long> info2 = new Pair<>(fPair1.getFirst(), fPair1.getSecond());
  87         Pair<String, Long> info3 = new Pair<>(fPair1.getFirst(), fPair1.getSecond());
  88
  89         assertTrue("equals", info1.equals(info2));
  90         assertTrue("equals", info2.equals(info3));
  91         assertTrue("equals", info1.equals(info3));
  92     }
  93
  94     @Test
  95     public void testEqualsNull() {
  96         assertTrue("equals", !fPair1.equals(null));
  97         assertTrue("equals", !fPair2.equals(null));
  98     }
  99
 100     @Test
 101     public void testEqualsDifferentObj() {
 102         Pair<Long, String> info = new Pair<>(1L, "String1");
 103         assertTrue("equals", !fPair1.equals(info));
 104     }
 105
 106     // ------------------------------------------------------------------------
 107     // hashCode
 108     // ------------------------------------------------------------------------
 109
 110     @Test
 111     public void testHashCode() {
 112         Pair<String, Long> info1 = new Pair<>(fPair1.getFirst(), fPair1.getSecond());
 113         Pair<String, Long> info2 = new Pair<>(fPair2.getFirst(), fPair2.getSecond());
 114
 115         assertTrue("hashCode", fPair1.hashCode() == info1.hashCode());
 116         assertTrue("hashCode", fPair2.hashCode() == info2.hashCode());
 117
 118         assertTrue("hashCode", fPair1.hashCode() != info2.hashCode());
 119         assertTrue("hashCode", fPair2.hashCode() != info1.hashCode());
 120     }
 121 }