LazyFieldTest.java

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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
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// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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package com.google.protobuf;
 
import protobuf_unittest.UnittestProto.TestAllExtensions;
import protobuf_unittest.UnittestProto.TestAllTypes;
import junit.framework.TestCase;
 
public class LazyFieldTest extends TestCase {
  public void testHashCode() {
    MessageLite message = TestUtil.getAllSet();
    LazyField lazyField = createLazyFieldFromMessage(message);
    assertEquals(message.hashCode(), lazyField.hashCode());
    lazyField.getValue();
    assertEquals(message.hashCode(), lazyField.hashCode());
    changeValue(lazyField);
    // make sure two messages have different hash code
    assertNotEqual(message.hashCode(), lazyField.hashCode());
  }
 
  public void testHashCodeEx() throws Exception {
    TestAllExtensions message = TestUtil.getAllExtensionsSet();
    LazyField lazyField = createLazyFieldFromMessage(message);
    assertEquals(message.hashCode(), lazyField.hashCode());
    lazyField.getValue();
    assertEquals(message.hashCode(), lazyField.hashCode());
    changeValue(lazyField);
    // make sure two messages have different hash code
    assertNotEqual(message.hashCode(), lazyField.hashCode());
  }
 
  public void testGetValue() {
    MessageLite message = TestUtil.getAllSet();
    LazyField lazyField = createLazyFieldFromMessage(message);
    assertEquals(message, lazyField.getValue());
    changeValue(lazyField);
    assertNotEqual(message, lazyField.getValue());
  }
 
  public void testGetValueEx() throws Exception {
    TestAllExtensions message = TestUtil.getAllExtensionsSet();
    LazyField lazyField = createLazyFieldFromMessage(message);
    assertEquals(message, lazyField.getValue());
    changeValue(lazyField);
    assertNotEqual(message, lazyField.getValue());
  }
 
  public void testEqualsObject() {
    MessageLite message = TestUtil.getAllSet();
    LazyField lazyField = createLazyFieldFromMessage(message);
    assertTrue(lazyField.equals(message));
    changeValue(lazyField);
    assertFalse(lazyField.equals(message));
    assertFalse(message.equals(lazyField.getValue()));
  }
 
  @SuppressWarnings("EqualsIncompatibleType") // LazyField.equals() is not symmetric
  public void testEqualsObjectEx() throws Exception {
    TestAllExtensions message = TestUtil.getAllExtensionsSet();
    LazyField lazyField = createLazyFieldFromMessage(message);
    assertTrue(lazyField.equals(message));
    changeValue(lazyField);
    assertFalse(lazyField.equals(message));
    assertFalse(message.equals(lazyField.getValue()));
  }
 
  // Help methods.
 
  private LazyField createLazyFieldFromMessage(MessageLite message) {
    ByteString bytes = message.toByteString();
    return new LazyField(
        message.getDefaultInstanceForType(), TestUtil.getExtensionRegistry(), bytes);
  }
 
  private void changeValue(LazyField lazyField) {
    TestAllTypes.Builder builder = TestUtil.getAllSet().toBuilder();
    builder.addRepeatedBool(true);
    MessageLite newMessage = builder.build();
    lazyField.setValue(newMessage);
  }
 
  private void assertNotEqual(Object unexpected, Object actual) {
    assertFalse(unexpected == actual || (unexpected != null && unexpected.equals(actual)));
  }
}