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1
7
8 package org.dom4j.util;
9
10 import junit.framework.Test;
11 import junit.framework.TestSuite;
12 import junit.framework.TestCase;
13
14 import java.util.HashMap  ;
15 import java.util.Map ;
16
17
29 public class SimpleSingletonTest extends TestCase {
30 public SimpleSingletonTest(String name) {
31 super(name);
32 }
33
34 private static SingletonStrategy singleton;
35
36 private static Object reference;
37
38 public void setUp() throws Exception {
39 super.setUp();
40 if (singleton == null) {
41 singleton = new PerThreadSingleton();
42 singleton.setSingletonClassName(HashMap .class.getName());
43 }
44 }
45
46 public void tearDown() throws Exception {
47 super.tearDown();
48 }
49
50 public void testFirstInstance() throws Exception {
51 Map map = (Map ) singleton.instance();
52 String expected = null;
53 String actual = (String ) map.get("Test");
54 assertEquals("testInstance", expected, actual);
55
56 expected = "new value";
57 map.put("Test", expected);
58
59 map = (Map ) singleton.instance();
60 reference = map;
61 actual = (String ) map.get("Test");
62 assertEquals("testFirstInstance", expected, actual);
63 }
64
65 public void testSecondInstance() throws Exception {
66 Map map = (Map ) singleton.instance();
67 assertEquals("testSecondInstance reference", reference, map);
68 String actual = (String ) map.get("Test");
69 String expected = "new value";
70 assertEquals("testInstance", expected, actual);
71 }
72
73 public static Test suite() {
74 TestSuite suite = new TestSuite();
75 suite.addTest(TestSuite.createTest(SimpleSingletonTest.class,
76 "testFirstInstance"));
77 suite.addTest(TestSuite.createTest(SimpleSingletonTest.class,
78 "testSecondInstance"));
79 return suite;
80 }
81 }
82
83
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