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1 package uk.co.jezuk.mango;
2
3 import junit.framework.*;
4
5 public class SelectingIteratorTest extends TestCase
6 {
7 java.util.List  list;
8
9 public SelectingIteratorTest(String name) { super(name); }
10 public static Test suite() { return new TestSuite(SelectingIteratorTest.class); }
11
12 protected void setUp()
13 {
14 list = new java.util.ArrayList ();
15 for(int i = 0; i < 10; ++i)
16 list.add(new Integer (i));
17 }
19 class LessThanFive implements Predicate
20 {
21 public boolean test(Object obj)
22 {
23 Integer i = (Integer )obj;
24 return i.intValue() < 5;
25 } }
27
28 public void test1()
29 {
30 java.util.Iterator iter = Iterators.SelectingIterator(list.iterator(), new LessThanFive());
31 int i = 0;
32 while(iter.hasNext())
33 {
34 ++i;
35 iter.next();
36 }
38 assertEquals(5, i);
39 }
41 public void test2()
42 {
43 list = new java.util.ArrayList ();
44 list.add("hawkeye pierce");
45 list.add("sacremento");
46 list.add("GOBBLE");
47 list.add("SINGLETON");
48 list.add("BILBO");
49 list.add("ERNEST");
50 list.add("DAVID");
51 list.add("BILLY");
52 list.add("SCAGGS");
53 list.add("CHARLES");
54 list.add("SIMEON");
55
56 java.util.Iterator iter = Iterators.SelectingIterator(list.iterator(),
57 new Predicate() {
58 public boolean test(Object o) {
59 String s = (String )o;
60 return s.charAt(0) == 'S';
61 }
62 });
63 int i = 0;
64 while(iter.hasNext())
65 {
66 ++i;
67 String s = (String )iter.next();
68 assertEquals(true, s.startsWith("S"));
69 } assertEquals(3, i);
71 }
73 public void test3()
74 {
75 list = new java.util.ArrayList ();
76 list.add("hawkeye pierce");
77 list.add("sacremento");
78 list.add("GOBBLE");
79 list.add("SINGLETON");
80 list.add("BILBO");
81 list.add("ERNEST");
82 list.add("DAVID");
83 list.add("BILLY");
84 list.add("SCAGGS");
85 list.add("CHARLES");
86 list.add("SIMEON");
87
88 java.util.Iterator iter = Iterators.SelectingIterator(list.iterator(),
89 new Predicate() {
90 public boolean test(Object o) {
91 String s = (String )o;
92 return s.charAt(0) == 'S';
93 }
94 });
95 while(iter.hasNext())
96 iter.remove();
97
98 assertEquals(8, list.size());
99 assertEquals("hawkeye pierce", list.get(0));
100 assertEquals("sacremento", list.get(1));
101 assertEquals("GOBBLE", list.get(2));
102 assertEquals("BILBO", list.get(3));
103 assertEquals("ERNEST", list.get(4));
104 assertEquals("DAVID", list.get(5));
105 assertEquals("BILLY", list.get(6));
106 assertEquals("CHARLES", list.get(7));
107 } } |
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