1 // Protocol Buffers - Google's data interchange format
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30 
31 package com.google.protobuf;
32 
33 import protobuf_unittest.UnittestProto.TestAllExtensions;
34 import protobuf_unittest.UnittestProto.TestAllTypes;
35 import junit.framework.TestCase;
36 
37 /**
38  * Unit test for {@link LazyField}.
39  *
40  * @author xiangl@google.com (Xiang Li)
41  */
42 public class LazyFieldTest extends TestCase {
testHashCode()43   public void testHashCode() {
44     MessageLite message = TestUtil.getAllSet();
45     LazyField lazyField = createLazyFieldFromMessage(message);
46     assertEquals(message.hashCode(), lazyField.hashCode());
47     lazyField.getValue();
48     assertEquals(message.hashCode(), lazyField.hashCode());
49     changeValue(lazyField);
50     // make sure two messages have different hash code
51     assertNotEqual(message.hashCode(), lazyField.hashCode());
52   }
53 
testHashCodeEx()54   public void testHashCodeEx() throws Exception {
55     TestAllExtensions message = TestUtil.getAllExtensionsSet();
56     LazyField lazyField = createLazyFieldFromMessage(message);
57     assertEquals(message.hashCode(), lazyField.hashCode());
58     lazyField.getValue();
59     assertEquals(message.hashCode(), lazyField.hashCode());
60     changeValue(lazyField);
61     // make sure two messages have different hash code
62     assertNotEqual(message.hashCode(), lazyField.hashCode());
63   }
64 
testGetValue()65   public void testGetValue() {
66     MessageLite message = TestUtil.getAllSet();
67     LazyField lazyField = createLazyFieldFromMessage(message);
68     assertEquals(message, lazyField.getValue());
69     changeValue(lazyField);
70     assertNotEqual(message, lazyField.getValue());
71   }
72 
testGetValueEx()73   public void testGetValueEx() throws Exception {
74     TestAllExtensions message = TestUtil.getAllExtensionsSet();
75     LazyField lazyField = createLazyFieldFromMessage(message);
76     assertEquals(message, lazyField.getValue());
77     changeValue(lazyField);
78     assertNotEqual(message, lazyField.getValue());
79   }
80 
testEqualsObject()81   public void testEqualsObject() {
82     MessageLite message = TestUtil.getAllSet();
83     LazyField lazyField = createLazyFieldFromMessage(message);
84     assertTrue(lazyField.equals(message));
85     changeValue(lazyField);
86     assertFalse(lazyField.equals(message));
87     assertFalse(message.equals(lazyField.getValue()));
88   }
89 
90   @SuppressWarnings("EqualsIncompatibleType") // LazyField.equals() is not symmetric
testEqualsObjectEx()91   public void testEqualsObjectEx() throws Exception {
92     TestAllExtensions message = TestUtil.getAllExtensionsSet();
93     LazyField lazyField = createLazyFieldFromMessage(message);
94     assertTrue(lazyField.equals(message));
95     changeValue(lazyField);
96     assertFalse(lazyField.equals(message));
97     assertFalse(message.equals(lazyField.getValue()));
98   }
99 
100   // Help methods.
101 
createLazyFieldFromMessage(MessageLite message)102   private LazyField createLazyFieldFromMessage(MessageLite message) {
103     ByteString bytes = message.toByteString();
104     return new LazyField(
105         message.getDefaultInstanceForType(), TestUtil.getExtensionRegistry(), bytes);
106   }
107 
changeValue(LazyField lazyField)108   private void changeValue(LazyField lazyField) {
109     TestAllTypes.Builder builder = TestUtil.getAllSet().toBuilder();
110     builder.addRepeatedBool(true);
111     MessageLite newMessage = builder.build();
112     lazyField.setValue(newMessage);
113   }
114 
assertNotEqual(Object unexpected, Object actual)115   private void assertNotEqual(Object unexpected, Object actual) {
116     assertFalse(unexpected == actual || (unexpected != null && unexpected.equals(actual)));
117   }
118 }
119