AssertTest


1   package junit.tests.framework;
2   
3   import junit.framework.AssertionFailedError;
4   import junit.framework.ComparisonFailure;
5   import junit.framework.TestCase;
6   
7   public class AssertTest extends TestCase {
8   
9       /* In the tests that follow, we can't use standard formatting
10       * for exception tests:
11       *     try {
12       *         somethingThatShouldThrow();
13       *         fail();
14       *     catch (AssertionFailedError e) {
15       *     }
16       * because fail() would never be reported.
17       */
18      public void testFail() {
19          // Also, we are testing fail, so we can't rely on fail() working.
20          // We have to throw the exception manually, .
21          try {
22              fail();
23          } catch (AssertionFailedError e) {
24              return;
25          }
26          throw new AssertionFailedError();
27      }
28  
29      public void testAssertEquals() {
30          Object   o= new Object  ();
31          assertEquals(o, o);
32          try {
33              assertEquals(new Object  (), new Object  ());
34          } catch (AssertionFailedError e) {
35              return;
36          }
37          fail();
38      }
39  
40      public void testAssertEqualsNull() {
41          assertEquals(null, null);
42      }
43  
44      public void testAssertStringEquals() {
45          assertEquals("a", "a");
46      }
47  
48      public void testAssertNullNotEqualsString() {
49          try {
50              assertEquals(null, "foo");
51              fail();
52          } catch (ComparisonFailure e) {
53          }
54      }
55  
56      public void testAssertStringNotEqualsNull() {
57          try {
58              assertEquals("foo", null);
59              fail();
60          } catch (ComparisonFailure e) {
61              e.getMessage(); // why no assertion?
62          }
63      }
64  
65      public void testAssertNullNotEqualsNull() {
66          try {
67              assertEquals(null, new Object  ());
68          } catch (AssertionFailedError e) {
69              e.getMessage(); // why no assertion?
70              return;
71          }
72          fail();
73      }
74  
75      public void testAssertNull() {
76          assertNull(null);
77          try {
78              assertNull(new Object  ());
79          } catch (AssertionFailedError e) {
80              return;
81          }
82          fail();
83      }
84  
85      public void testAssertNotNull() {
86          assertNotNull(new Object  ());
87          try {
88              assertNotNull(null);
89          } catch (AssertionFailedError e) {
90              return;
91          }
92          fail();
93      }
94  
95      public void testAssertTrue() {
96          assertTrue(true);
97          try {
98              assertTrue(false);
99          } catch (AssertionFailedError e) {
100             return;
101         }
102         fail();
103     }
104 
105     public void testAssertFalse() {
106         assertFalse(false);
107         try {
108             assertFalse(true);
109         } catch (AssertionFailedError e) {
110             return;
111         }
112         fail();
113     }
114 
115     public void testAssertSame() {
116         Object   o= new Object  ();
117         assertSame(o, o);
118         try {
119             assertSame(new Integer  (1), new Integer  (1));
120         } catch (AssertionFailedError e) {
121             return;
122         }
123         fail();
124     }
125 
126     public void testAssertNotSame() {
127         assertNotSame(new Integer  (1), null);
128         assertNotSame(null, new Integer  (1));
129         assertNotSame(new Integer  (1), new Integer  (1));
130         try {
131             Integer   obj= new Integer  (1);
132             assertNotSame(obj, obj);
133         } catch (AssertionFailedError e) {
134             return;
135         }
136         fail();
137     }
138 
139     public void testAssertNotSameFailsNull() {
140         try {
141             assertNotSame(null, null);
142         } catch (AssertionFailedError e) {
143             return;
144         }
145         fail();
146     }
147 }
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