RepeatedFieldBuilderV3Test.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
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// contributors may be used to endorse or promote products derived from
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package com.google.protobuf;
 
import protobuf_unittest.UnittestProto.TestAllTypes;
import protobuf_unittest.UnittestProto.TestAllTypesOrBuilder;
import java.util.Collections;
import java.util.List;
import junit.framework.TestCase;
 
public class RepeatedFieldBuilderV3Test extends TestCase {
 
  public void testBasicUse() {
    TestUtil.MockBuilderParent mockParent = new TestUtil.MockBuilderParent();
    RepeatedFieldBuilderV3<TestAllTypes, TestAllTypes.Builder, TestAllTypesOrBuilder> builder =
        newRepeatedFieldBuilderV3(mockParent);
    builder.addMessage(TestAllTypes.newBuilder().setOptionalInt32(0).build());
    builder.addMessage(TestAllTypes.newBuilder().setOptionalInt32(1).build());
    assertEquals(0, builder.getMessage(0).getOptionalInt32());
    assertEquals(1, builder.getMessage(1).getOptionalInt32());
 
    List<TestAllTypes> list = builder.build();
    assertEquals(2, list.size());
    assertEquals(0, list.get(0).getOptionalInt32());
    assertEquals(1, list.get(1).getOptionalInt32());
    assertIsUnmodifiable(list);
 
    // Make sure it doesn't change.
    List<TestAllTypes> list2 = builder.build();
    assertSame(list, list2);
    assertEquals(0, mockParent.getInvalidationCount());
  }
 
  public void testGoingBackAndForth() {
    TestUtil.MockBuilderParent mockParent = new TestUtil.MockBuilderParent();
    RepeatedFieldBuilderV3<TestAllTypes, TestAllTypes.Builder, TestAllTypesOrBuilder> builder =
        newRepeatedFieldBuilderV3(mockParent);
    builder.addMessage(TestAllTypes.newBuilder().setOptionalInt32(0).build());
    builder.addMessage(TestAllTypes.newBuilder().setOptionalInt32(1).build());
    assertEquals(0, builder.getMessage(0).getOptionalInt32());
    assertEquals(1, builder.getMessage(1).getOptionalInt32());
 
    // Convert to list
    List<TestAllTypes> list = builder.build();
    assertEquals(2, list.size());
    assertEquals(0, list.get(0).getOptionalInt32());
    assertEquals(1, list.get(1).getOptionalInt32());
    assertIsUnmodifiable(list);
 
    // Update 0th item
    assertEquals(0, mockParent.getInvalidationCount());
    builder.getBuilder(0).setOptionalString("foo");
    assertEquals(1, mockParent.getInvalidationCount());
    list = builder.build();
    assertEquals(2, list.size());
    assertEquals(0, list.get(0).getOptionalInt32());
    assertEquals("foo", list.get(0).getOptionalString());
    assertEquals(1, list.get(1).getOptionalInt32());
    assertIsUnmodifiable(list);
    assertEquals(1, mockParent.getInvalidationCount());
  }
 
  public void testVariousMethods() {
    TestUtil.MockBuilderParent mockParent = new TestUtil.MockBuilderParent();
    RepeatedFieldBuilderV3<TestAllTypes, TestAllTypes.Builder, TestAllTypesOrBuilder> builder =
        newRepeatedFieldBuilderV3(mockParent);
    builder.addMessage(TestAllTypes.newBuilder().setOptionalInt32(1).build());
    builder.addMessage(TestAllTypes.newBuilder().setOptionalInt32(2).build());
    builder.addBuilder(0, TestAllTypes.getDefaultInstance()).setOptionalInt32(0);
    builder.addBuilder(TestAllTypes.getDefaultInstance()).setOptionalInt32(3);
 
    assertEquals(0, builder.getMessage(0).getOptionalInt32());
    assertEquals(1, builder.getMessage(1).getOptionalInt32());
    assertEquals(2, builder.getMessage(2).getOptionalInt32());
    assertEquals(3, builder.getMessage(3).getOptionalInt32());
 
    assertEquals(0, mockParent.getInvalidationCount());
    List<TestAllTypes> messages = builder.build();
    assertEquals(4, messages.size());
    assertSame(messages, builder.build()); // expect same list
 
    // Remove a message.
    builder.remove(2);
    assertEquals(1, mockParent.getInvalidationCount());
    assertEquals(3, builder.getCount());
    assertEquals(0, builder.getMessage(0).getOptionalInt32());
    assertEquals(1, builder.getMessage(1).getOptionalInt32());
    assertEquals(3, builder.getMessage(2).getOptionalInt32());
 
    // Remove a builder.
    builder.remove(0);
    assertEquals(1, mockParent.getInvalidationCount());
    assertEquals(2, builder.getCount());
    assertEquals(1, builder.getMessage(0).getOptionalInt32());
    assertEquals(3, builder.getMessage(1).getOptionalInt32());
 
    // Test clear.
    builder.clear();
    assertEquals(1, mockParent.getInvalidationCount());
    assertEquals(0, builder.getCount());
    assertTrue(builder.isEmpty());
  }
 
  public void testLists() {
    TestUtil.MockBuilderParent mockParent = new TestUtil.MockBuilderParent();
    RepeatedFieldBuilderV3<TestAllTypes, TestAllTypes.Builder, TestAllTypesOrBuilder> builder =
        newRepeatedFieldBuilderV3(mockParent);
    builder.addMessage(TestAllTypes.newBuilder().setOptionalInt32(1).build());
    builder.addMessage(0, TestAllTypes.newBuilder().setOptionalInt32(0).build());
    assertEquals(0, builder.getMessage(0).getOptionalInt32());
    assertEquals(1, builder.getMessage(1).getOptionalInt32());
 
    // Use list of builders.
    List<TestAllTypes.Builder> builders = builder.getBuilderList();
    assertEquals(0, builders.get(0).getOptionalInt32());
    assertEquals(1, builders.get(1).getOptionalInt32());
    builders.get(0).setOptionalInt32(10);
    builders.get(1).setOptionalInt32(11);
 
    // Use list of protos
    List<TestAllTypes> protos = builder.getMessageList();
    assertEquals(10, protos.get(0).getOptionalInt32());
    assertEquals(11, protos.get(1).getOptionalInt32());
 
    // Add an item to the builders and verify it's updated in both
    builder.addMessage(TestAllTypes.newBuilder().setOptionalInt32(12).build());
    assertEquals(3, builders.size());
    assertEquals(3, protos.size());
  }
 
  private void assertIsUnmodifiable(List<?> list) {
    if (list == Collections.emptyList()) {
      // OKAY -- Need to check this b/c EmptyList allows you to call clear.
    } else {
      try {
        list.clear();
        fail("List wasn't immutable");
      } catch (UnsupportedOperationException e) {
        // good
      }
    }
  }
 
  private RepeatedFieldBuilderV3<TestAllTypes, TestAllTypes.Builder, TestAllTypesOrBuilder>
      newRepeatedFieldBuilderV3(GeneratedMessage.BuilderParent parent) {
    return new RepeatedFieldBuilderV3<TestAllTypes, TestAllTypes.Builder, TestAllTypesOrBuilder>(
        Collections.<TestAllTypes>emptyList(), false, parent, false);
  }
}