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1
16
17 package org.springframework.util.comparator;
18
19 import java.util.Comparator  ;
20
21 import junit.framework.TestCase;
22
23 import org.springframework.beans.support.PropertyComparator;
24
25
28 public class ComparatorTests extends TestCase {
29
30 public void testComparableComparator() {
31 Comparator c = new ComparableComparator();
32 String s1 = "abc";
33 String s2 = "cde";
34 assertTrue(c.compare(s1, s2) < 0);
35 }
36
37 public void testComparableComparatorIllegalArgs() {
38 Comparator c = new ComparableComparator();
39 Object o1 = new Object ();
40 Object o2 = new Object ();
41 try {
42 c.compare(o1, o2);
43 }
44 catch (IllegalArgumentException e) {
45 return;
46 }
47 fail("Comparator should have thrown a cce");
48 }
49
50 public void testBooleanComparatorTrueLow() {
51 Comparator c = BooleanComparator.TRUE_LOW;
52 assertTrue(c.compare(new Boolean (true), new Boolean (false)) < 0);
53 }
54
55 public void testBooleanComparatorTrueHigh() {
56 Comparator c = BooleanComparator.TRUE_HIGH;
57 assertTrue(c.compare(new Boolean (true), new Boolean (false)) > 0);
58 assertTrue(c.compare(Boolean.TRUE, Boolean.TRUE) == 0);
59 }
60
61 public void testPropertyComparator() {
62 Dog dog = new Dog();
63 dog.setNickName("mace");
64
65 Dog dog2 = new Dog();
66 dog2.setNickName("biscy");
67
68 PropertyComparator c = new PropertyComparator("nickName", false, true);
69 assertTrue(c.compare(dog, dog2) > 0);
70 assertTrue(c.compare(dog, dog) == 0);
71 assertTrue(c.compare(dog2, dog) < 0);
72 }
73
74 public void testPropertyComparatorNulls() {
75 Dog dog = new Dog();
76 Dog dog2 = new Dog();
77 PropertyComparator c = new PropertyComparator("nickName", false, true);
78 assertTrue(c.compare(dog, dog2) == 0);
79 }
80
81 public void testNullSafeComparatorNullsLow() {
82 Comparator c = NullSafeComparator.NULLS_LOW;
83 assertTrue(c.compare(null, "boo") < 0);
84 }
85
86 public void testNullSafeComparatorNullsHigh() {
87 Comparator c = NullSafeComparator.NULLS_HIGH;
88 assertTrue(c.compare(null, "boo") > 0);
89 assertTrue(c.compare(null, null) == 0);
90 }
91
92 public void testCompoundComparatorEmpty() {
93 Comparator c = new CompoundComparator();
94 try {
95 c.compare("foo", "bar");
96 }
97 catch (IllegalStateException e) {
98 return;
99 }
100 fail("illegal state should've been thrown on empty list");
101 }
102
103 public void testCompoundComparator() {
104 CompoundComparator c = new CompoundComparator();
105 c.addComparator(new PropertyComparator("lastName", false, true));
106
107 Dog dog1 = new Dog();
108 dog1.setFirstName("macy");
109 dog1.setLastName("grayspots");
110
111 Dog dog2 = new Dog();
112 dog2.setFirstName("biscuit");
113 dog2.setLastName("grayspots");
114
115 assertTrue(c.compare(dog1, dog2) == 0);
116
117 c.addComparator(new PropertyComparator("firstName", false, true));
118 assertTrue(c.compare(dog1, dog2) > 0);
119
120 dog2.setLastName("konikk dog");
121 assertTrue(c.compare(dog2, dog1) > 0);
122 }
123
124 public void testCompoundComparatorInvert() {
125 CompoundComparator c = new CompoundComparator();
126 c.addComparator(new PropertyComparator("lastName", false, true));
127 c.addComparator(new PropertyComparator("firstName", false, true));
128 Dog dog1 = new Dog();
129 dog1.setFirstName("macy");
130 dog1.setLastName("grayspots");
131
132 Dog dog2 = new Dog();
133 dog2.setFirstName("biscuit");
134 dog2.setLastName("grayspots");
135
136 assertTrue(c.compare(dog1, dog2) > 0);
137 c.invertOrder();
138 assertTrue(c.compare(dog1, dog2) < 0);
139 }
140
141
142 private static class Dog implements Comparable {
143
144 private String nickName;
145
146 private String firstName;
147
148 private String lastName;
149
150 public int compareTo(Object o) {
151 return nickName.compareTo(((Dog)o).nickName);
152 }
153
154 public String getNickName() {
155 return nickName;
156 }
157
158 public void setNickName(String nickName) {
159 this.nickName = nickName;
160 }
161
162 public String getFirstName() {
163 return firstName;
164 }
165
166 public void setFirstName(String firstName) {
167 this.firstName = firstName;
168 }
169
170 public String getLastName() {
171 return lastName;
172 }
173
174 public void setLastName(String lastName) {
175 this.lastName = lastName;
176 }
177 }
178
179 }
180 |
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