SingleFieldBuilderV3Test.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/
//
// Redistribution and use in source and binary forms, with or without
// 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
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//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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package com.google.protobuf;
 
import protobuf_unittest.UnittestProto.TestAllTypes;
import protobuf_unittest.UnittestProto.TestAllTypesOrBuilder;
import junit.framework.TestCase;
 
public class SingleFieldBuilderV3Test extends TestCase {
 
  public void testBasicUseAndInvalidations() {
    TestUtil.MockBuilderParent mockParent = new TestUtil.MockBuilderParent();
    SingleFieldBuilderV3<TestAllTypes, TestAllTypes.Builder, TestAllTypesOrBuilder> builder =
        new SingleFieldBuilderV3<TestAllTypes, TestAllTypes.Builder, TestAllTypesOrBuilder>(
            TestAllTypes.getDefaultInstance(), mockParent, false);
    assertSame(TestAllTypes.getDefaultInstance(), builder.getMessage());
    assertEquals(TestAllTypes.getDefaultInstance(), builder.getBuilder().buildPartial());
    assertEquals(0, mockParent.getInvalidationCount());
 
    builder.getBuilder().setOptionalInt32(10);
    assertEquals(0, mockParent.getInvalidationCount());
    TestAllTypes message = builder.build();
    assertEquals(10, message.getOptionalInt32());
 
    // Test that we receive invalidations now that build has been called.
    assertEquals(0, mockParent.getInvalidationCount());
    builder.getBuilder().setOptionalInt32(20);
    assertEquals(1, mockParent.getInvalidationCount());
 
    // Test that we don't keep getting invalidations on every change
    builder.getBuilder().setOptionalInt32(30);
    assertEquals(1, mockParent.getInvalidationCount());
  }
 
  public void testSetMessage() {
    TestUtil.MockBuilderParent mockParent = new TestUtil.MockBuilderParent();
    SingleFieldBuilderV3<TestAllTypes, TestAllTypes.Builder, TestAllTypesOrBuilder> builder =
        new SingleFieldBuilderV3<TestAllTypes, TestAllTypes.Builder, TestAllTypesOrBuilder>(
            TestAllTypes.getDefaultInstance(), mockParent, false);
    builder.setMessage(TestAllTypes.newBuilder().setOptionalInt32(0).build());
    assertEquals(0, builder.getMessage().getOptionalInt32());
 
    // Update message using the builder
    builder.getBuilder().setOptionalInt32(1);
    assertEquals(0, mockParent.getInvalidationCount());
    assertEquals(1, builder.getBuilder().getOptionalInt32());
    assertEquals(1, builder.getMessage().getOptionalInt32());
    builder.build();
    builder.getBuilder().setOptionalInt32(2);
    assertEquals(2, builder.getBuilder().getOptionalInt32());
    assertEquals(2, builder.getMessage().getOptionalInt32());
 
    // Make sure message stays cached
    assertSame(builder.getMessage(), builder.getMessage());
  }
 
  public void testClear() {
    TestUtil.MockBuilderParent mockParent = new TestUtil.MockBuilderParent();
    SingleFieldBuilderV3<TestAllTypes, TestAllTypes.Builder, TestAllTypesOrBuilder> builder =
        new SingleFieldBuilderV3<TestAllTypes, TestAllTypes.Builder, TestAllTypesOrBuilder>(
            TestAllTypes.getDefaultInstance(), mockParent, false);
    builder.setMessage(TestAllTypes.newBuilder().setOptionalInt32(0).build());
    assertNotSame(TestAllTypes.getDefaultInstance(), builder.getMessage());
    builder.clear();
    assertSame(TestAllTypes.getDefaultInstance(), builder.getMessage());
 
    builder.getBuilder().setOptionalInt32(1);
    assertNotSame(TestAllTypes.getDefaultInstance(), builder.getMessage());
    builder.clear();
    assertSame(TestAllTypes.getDefaultInstance(), builder.getMessage());
  }
 
  public void testMerge() {
    TestUtil.MockBuilderParent mockParent = new TestUtil.MockBuilderParent();
    SingleFieldBuilderV3<TestAllTypes, TestAllTypes.Builder, TestAllTypesOrBuilder> builder =
        new SingleFieldBuilderV3<TestAllTypes, TestAllTypes.Builder, TestAllTypesOrBuilder>(
            TestAllTypes.getDefaultInstance(), mockParent, false);
 
    // Merge into default field.
    builder.mergeFrom(TestAllTypes.getDefaultInstance());
    assertSame(TestAllTypes.getDefaultInstance(), builder.getMessage());
 
    // Merge into non-default field on existing builder.
    builder.getBuilder().setOptionalInt32(2);
    builder.mergeFrom(TestAllTypes.newBuilder().setOptionalDouble(4.0).buildPartial());
    assertEquals(2, builder.getMessage().getOptionalInt32());
    assertEquals(4.0, builder.getMessage().getOptionalDouble(), 0.0);
 
    // Merge into non-default field on existing message
    builder.setMessage(TestAllTypes.newBuilder().setOptionalInt32(10).buildPartial());
    builder.mergeFrom(TestAllTypes.newBuilder().setOptionalDouble(5.0).buildPartial());
    assertEquals(10, builder.getMessage().getOptionalInt32());
    assertEquals(5.0, builder.getMessage().getOptionalDouble(), 0.0);
  }
}