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16 package org.apache.commons.collections;
17
18 import java.util.ArrayList  ;
19 import java.util.Arrays ;
20 import java.util.Collection ;
21 import java.util.List ;
22
23 import junit.framework.Test;
24
25 import org.apache.commons.collections.list.PredicatedList;
26
27
36 public class TestListUtils extends BulkTest {
37
38 public TestListUtils(String name) {
39 super(name);
40 }
41
42 public static Test suite() {
43 return BulkTest.makeSuite(TestListUtils.class);
44 }
45
46 public void testNothing() {
47 }
48
49 public void testpredicatedList() {
50 Predicate predicate = new Predicate() {
51 public boolean evaluate(Object o) {
52 return o instanceof String ;
53 }
54 };
55 List list =
56 ListUtils.predicatedList(new ArrayStack(), predicate);
57 assertTrue("returned object should be a PredicatedList",
58 list instanceof PredicatedList);
59 try {
60 list =
61 ListUtils.predicatedList(new ArrayStack(), null);
62 fail("Expecting IllegalArgumentException for null predicate.");
63 } catch (IllegalArgumentException ex) {
64 }
66 try {
67 list =
68 ListUtils.predicatedList(null, predicate);
69 fail("Expecting IllegalArgumentException for null list.");
70 } catch (IllegalArgumentException ex) {
71 }
73 }
74
75 public void testLazyList() {
76 List list = ListUtils.lazyList(new ArrayList (), new Factory() {
77
78 private int index;
79
80 public Object create() {
81 index++;
82 return new Integer (index);
83 }
84 });
85
86 assertNotNull((Integer )list.get(5));
87 assertEquals(6, list.size());
88
89 assertNotNull((Integer )list.get(5));
90 assertEquals(6, list.size());
91 }
92
93 public void testEquals() {
94 Collection data = Arrays.asList( new String [] { "a", "b", "c" });
95
96 List a = new ArrayList ( data );
97 List b = new ArrayList ( data );
98
99 assertEquals(true, a.equals(b));
100 assertEquals(true, ListUtils.isEqualList(a, b));
101 a.clear();
102 assertEquals(false, ListUtils.isEqualList(a, b));
103 assertEquals(false, ListUtils.isEqualList(a, null));
104 assertEquals(false, ListUtils.isEqualList(null, b));
105 assertEquals(true, ListUtils.isEqualList(null, null));
106 }
107
108 public void testHashCode() {
109 Collection data = Arrays.asList( new String [] { "a", "b", "c" });
110
111 List a = new ArrayList ( data );
112 List b = new ArrayList ( data );
113
114 assertEquals(true, a.hashCode() == b.hashCode());
115 assertEquals(true, a.hashCode() == ListUtils.hashCodeForList(a));
116 assertEquals(true, b.hashCode() == ListUtils.hashCodeForList(b));
117 assertEquals(true, ListUtils.hashCodeForList(a) == ListUtils.hashCodeForList(b));
118 a.clear();
119 assertEquals(false, ListUtils.hashCodeForList(a) == ListUtils.hashCodeForList(b));
120 assertEquals(0, ListUtils.hashCodeForList(null));
121 }
122
123 }
124 |
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