1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5  * This code is free software; you can redistribute it and/or modify it
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9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20  * or visit www.oracle.com if you need additional information or have any
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23 
24 /*
25  * @test
26  * @bug 6306829
27  * @summary Verify assertions in get() javadocs
28  * @author Martin Buchholz
29  */
30 package test.java.util.Map;
31 
32 import java.util.HashMap;
33 import java.util.Hashtable;
34 import java.util.IdentityHashMap;
35 import java.util.LinkedHashMap;
36 import java.util.Map;
37 import java.util.SortedMap;
38 import java.util.TreeMap;
39 import java.util.WeakHashMap;
40 import java.util.concurrent.ConcurrentHashMap;
41 import java.util.concurrent.ConcurrentMap;
42 import java.util.concurrent.ConcurrentSkipListMap;
43 
44 import org.testng.annotations.Test;
45 import org.testng.Assert;
46 
47 public class Get {
48 
49     @Test
testGet()50     public void testGet() {
51         testMap(new Hashtable<>());
52         testMap(new HashMap<>());
53         testMap(new IdentityHashMap<>());
54         testMap(new LinkedHashMap<>());
55         testMap(new ConcurrentHashMap<>());
56         testMap(new WeakHashMap<>());
57         testMap(new TreeMap<>());
58         testMap(new ConcurrentSkipListMap<>());
59     }
60 
put(Map<Character,Boolean> m, Character key, Boolean value, Boolean oldValue)61     private static void put(Map<Character,Boolean> m,
62             Character key, Boolean value,
63             Boolean oldValue) {
64         if (oldValue != null) {
65             Assert.assertTrue(m.containsValue(oldValue));
66             Assert.assertTrue(m.values().contains(oldValue));
67         }
68         Assert.assertEquals(m.put(key, value), oldValue);
69         Assert.assertEquals(m.get(key), value);
70         Assert.assertTrue(m.containsKey(key));
71         Assert.assertTrue(m.keySet().contains(key));
72         Assert.assertTrue(m.containsValue(value));
73         Assert.assertTrue(m.values().contains(value));
74         Assert.assertTrue(! m.isEmpty());
75     }
76 
testMap(Map<Character,Boolean> m)77     private static void testMap(Map<Character,Boolean> m) {
78         // We verify following assertions in get(Object) method javadocs
79         boolean permitsNullKeys = (! (m instanceof ConcurrentMap ||
80                 m instanceof Hashtable     ||
81                 m instanceof SortedMap));
82         boolean permitsNullValues = (! (m instanceof ConcurrentMap ||
83                 m instanceof Hashtable));
84         boolean usesIdentity = m instanceof IdentityHashMap;
85 
86         System.err.println(m.getClass());
87         put(m, 'A', true,  null);
88         put(m, 'A', false, true);       // Guaranteed identical by JLS
89         put(m, 'B', true,  null);
90         put(m, new Character('A'), false, usesIdentity ? null : false);
91         if (permitsNullKeys) {
92             try {
93                 put(m, null, true,  null);
94                 put(m, null, false, true);
95             }
96             catch (Throwable t) { Assert.fail(); }
97         } else {
98             try { m.get(null); Assert.fail(m.getClass().getName() + " did not reject null key"); }
99             catch (NullPointerException e) {}
100             catch (Throwable t) { Assert.fail(); }
101 
102             try { m.put(null, true); Assert.fail(m.getClass().getName() + " did not reject null key"); }
103             catch (NullPointerException e) {}
104             catch (Throwable t) { Assert.fail(); }
105         }
106         if (permitsNullValues) {
107             try {
108                 put(m, 'C', null, null);
109                 put(m, 'C', true, null);
110                 put(m, 'C', null, true);
111             }
112             catch (Throwable t) { Assert.fail(); }
113         } else {
114             try { m.put('A', null); Assert.fail(m.getClass().getName() + " did not reject null key"); }
115             catch (NullPointerException e) {}
116             catch (Throwable t) { Assert.fail(); }
117 
118             try { m.put('C', null); Assert.fail(m.getClass().getName() + " did not reject null key"); }
119             catch (NullPointerException e) {}
120             catch (Throwable t) { Assert.fail(); }
121         }
122     }
123 }