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      1 // Protocol Buffers - Google's data interchange format
      2 // Copyright 2008 Google Inc.  All rights reserved.
      3 // https://developers.google.com/protocol-buffers/
      4 //
      5 // Redistribution and use in source and binary forms, with or without
      6 // modification, are permitted provided that the following conditions are
      7 // met:
      8 //
      9 //     * Redistributions of source code must retain the above copyright
     10 // notice, this list of conditions and the following disclaimer.
     11 //     * Redistributions in binary form must reproduce the above
     12 // copyright notice, this list of conditions and the following disclaimer
     13 // in the documentation and/or other materials provided with the
     14 // distribution.
     15 //     * Neither the name of Google Inc. nor the names of its
     16 // contributors may be used to endorse or promote products derived from
     17 // this software without specific prior written permission.
     18 //
     19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30 
     31 package com.google.protobuf;
     32 
     33 import protobuf_unittest.UnittestProto.TestAllExtensions;
     34 import protobuf_unittest.UnittestProto.TestAllTypes;
     35 
     36 import java.io.IOException;
     37 import junit.framework.TestCase;
     38 
     39 /**
     40  * Unit test for {@link LazyField}.
     41  *
     42  * @author xiangl (at) google.com (Xiang Li)
     43  */
     44 public class LazyFieldTest extends TestCase {
     45   public void testHashCode() {
     46     MessageLite message = TestUtil.getAllSet();
     47     LazyField lazyField =
     48         createLazyFieldFromMessage(message);
     49     assertEquals(message.hashCode(), lazyField.hashCode());
     50     lazyField.getValue();
     51     assertEquals(message.hashCode(), lazyField.hashCode());
     52     changeValue(lazyField);
     53     // make sure two messages have different hash code
     54     assertNotEqual(message.hashCode(), lazyField.hashCode());
     55   }
     56 
     57   public void testHashCodeEx() throws Exception {
     58     TestAllExtensions message = TestUtil.getAllExtensionsSet();
     59     LazyField lazyField = createLazyFieldFromMessage(message);
     60     assertEquals(message.hashCode(), lazyField.hashCode());
     61     lazyField.getValue();
     62     assertEquals(message.hashCode(), lazyField.hashCode());
     63     changeValue(lazyField);
     64     // make sure two messages have different hash code
     65     assertNotEqual(message.hashCode(), lazyField.hashCode());
     66   }
     67 
     68   public void testGetValue() {
     69     MessageLite message = TestUtil.getAllSet();
     70     LazyField lazyField = createLazyFieldFromMessage(message);
     71     assertEquals(message, lazyField.getValue());
     72     changeValue(lazyField);
     73     assertNotEqual(message, lazyField.getValue());
     74   }
     75 
     76   public void testGetValueEx() throws Exception {
     77     TestAllExtensions message = TestUtil.getAllExtensionsSet();
     78     LazyField lazyField = createLazyFieldFromMessage(message);
     79     assertEquals(message, lazyField.getValue());
     80     changeValue(lazyField);
     81     assertNotEqual(message, lazyField.getValue());
     82   }
     83 
     84   public void testEqualsObject() {
     85     MessageLite message = TestUtil.getAllSet();
     86     LazyField lazyField = createLazyFieldFromMessage(message);
     87     assertTrue(lazyField.equals(message));
     88     changeValue(lazyField);
     89     assertFalse(lazyField.equals(message));
     90     assertFalse(message.equals(lazyField.getValue()));
     91   }
     92 
     93   public void testEqualsObjectEx() throws Exception {
     94     TestAllExtensions message = TestUtil.getAllExtensionsSet();
     95     LazyField lazyField = createLazyFieldFromMessage(message);
     96     assertTrue(lazyField.equals(message));
     97     changeValue(lazyField);
     98     assertFalse(lazyField.equals(message));
     99     assertFalse(message.equals(lazyField.getValue()));
    100   }
    101 
    102   // Help methods.
    103 
    104   private LazyField createLazyFieldFromMessage(MessageLite message) {
    105     ByteString bytes = message.toByteString();
    106     return new LazyField(message.getDefaultInstanceForType(),
    107         TestUtil.getExtensionRegistry(), bytes);
    108   }
    109 
    110   private void changeValue(LazyField lazyField) {
    111     TestAllTypes.Builder builder = TestUtil.getAllSet().toBuilder();
    112     builder.addRepeatedBool(true);
    113     MessageLite newMessage = builder.build();
    114     lazyField.setValue(newMessage);
    115   }
    116 
    117   private void assertNotEqual(Object unexpected, Object actual) {
    118     assertFalse(unexpected == actual
    119         || (unexpected != null && unexpected.equals(actual)));
    120   }
    121 }
    122