java/src/test/java/com/google/protobuf/SingleFieldBuilderTest.java

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  30
  31 package com.google.protobuf;
  32
  33 import protobuf_unittest.UnittestProto.TestAllTypes;
  34 import protobuf_unittest.UnittestProto.TestAllTypesOrBuilder;
  35
  36 import junit.framework.TestCase;
  37
  38 /**
  39  * Tests for {@link SingleFieldBuilder}. This tests basic functionality.
  40  * More extensive testing is provided via other tests that exercise the
  41  * builder.
  42  *
  43  * @author jonp@google.com (Jon Perlow)
  44  */
  45 public class SingleFieldBuilderTest extends TestCase {
  46
  47   public void testBasicUseAndInvalidations() {
  48     TestUtil.MockBuilderParent mockParent = new TestUtil.MockBuilderParent();
  49     SingleFieldBuilder<TestAllTypes, TestAllTypes.Builder,
  50         TestAllTypesOrBuilder> builder =
  51         new SingleFieldBuilder<TestAllTypes, TestAllTypes.Builder,
  52             TestAllTypesOrBuilder>(
  53             TestAllTypes.getDefaultInstance(),
  54             mockParent,
  55             false);
  56     assertSame(TestAllTypes.getDefaultInstance(), builder.getMessage());
  57     assertEquals(TestAllTypes.getDefaultInstance(),
  58         builder.getBuilder().buildPartial());
  59     assertEquals(0, mockParent.getInvalidationCount());
  60
  61     builder.getBuilder().setOptionalInt32(10);
  62     assertEquals(0, mockParent.getInvalidationCount());
  63     TestAllTypes message = builder.build();
  64     assertEquals(10, message.getOptionalInt32());
  65
  66     // Test that we receive invalidations now that build has been called.
  67     assertEquals(0, mockParent.getInvalidationCount());
  68     builder.getBuilder().setOptionalInt32(20);
  69     assertEquals(1, mockParent.getInvalidationCount());
  70
  71     // Test that we don't keep getting invalidations on every change
  72     builder.getBuilder().setOptionalInt32(30);
  73     assertEquals(1, mockParent.getInvalidationCount());
  74
  75   }
  76
  77   public void testSetMessage() {
  78     TestUtil.MockBuilderParent mockParent = new TestUtil.MockBuilderParent();
  79     SingleFieldBuilder<TestAllTypes, TestAllTypes.Builder,
  80         TestAllTypesOrBuilder> builder =
  81         new SingleFieldBuilder<TestAllTypes, TestAllTypes.Builder,
  82             TestAllTypesOrBuilder>(
  83             TestAllTypes.getDefaultInstance(),
  84             mockParent,
  85             false);
  86     builder.setMessage(TestAllTypes.newBuilder().setOptionalInt32(0).build());
  87     assertEquals(0, builder.getMessage().getOptionalInt32());
  88
  89     // Update message using the builder
  90     builder.getBuilder().setOptionalInt32(1);
  91     assertEquals(0, mockParent.getInvalidationCount());
  92     assertEquals(1, builder.getBuilder().getOptionalInt32());
  93     assertEquals(1, builder.getMessage().getOptionalInt32());
  94     builder.build();
  95     builder.getBuilder().setOptionalInt32(2);
  96     assertEquals(2, builder.getBuilder().getOptionalInt32());
  97     assertEquals(2, builder.getMessage().getOptionalInt32());
  98
  99     // Make sure message stays cached
 100     assertSame(builder.getMessage(), builder.getMessage());
 101   }
 102
 103   public void testClear() {
 104     TestUtil.MockBuilderParent mockParent = new TestUtil.MockBuilderParent();
 105     SingleFieldBuilder<TestAllTypes, TestAllTypes.Builder,
 106         TestAllTypesOrBuilder> builder =
 107         new SingleFieldBuilder<TestAllTypes, TestAllTypes.Builder,
 108             TestAllTypesOrBuilder>(
 109             TestAllTypes.getDefaultInstance(),
 110             mockParent,
 111             false);
 112     builder.setMessage(TestAllTypes.newBuilder().setOptionalInt32(0).build());
 113     assertNotSame(TestAllTypes.getDefaultInstance(), builder.getMessage());
 114     builder.clear();
 115     assertSame(TestAllTypes.getDefaultInstance(), builder.getMessage());
 116
 117     builder.getBuilder().setOptionalInt32(1);
 118     assertNotSame(TestAllTypes.getDefaultInstance(), builder.getMessage());
 119     builder.clear();
 120     assertSame(TestAllTypes.getDefaultInstance(), builder.getMessage());
 121   }
 122
 123   public void testMerge() {
 124     TestUtil.MockBuilderParent mockParent = new TestUtil.MockBuilderParent();
 125     SingleFieldBuilder<TestAllTypes, TestAllTypes.Builder,
 126         TestAllTypesOrBuilder> builder =
 127         new SingleFieldBuilder<TestAllTypes, TestAllTypes.Builder,
 128             TestAllTypesOrBuilder>(
 129             TestAllTypes.getDefaultInstance(),
 130             mockParent,
 131             false);
 132
 133     // Merge into default field.
 134     builder.mergeFrom(TestAllTypes.getDefaultInstance());
 135     assertSame(TestAllTypes.getDefaultInstance(), builder.getMessage());
 136
 137     // Merge into non-default field on existing builder.
 138     builder.getBuilder().setOptionalInt32(2);
 139     builder.mergeFrom(TestAllTypes.newBuilder()
 140         .setOptionalDouble(4.0)
 141         .buildPartial());
 142     assertEquals(2, builder.getMessage().getOptionalInt32());
 143     assertEquals(4.0, builder.getMessage().getOptionalDouble());
 144
 145     // Merge into non-default field on existing message
 146     builder.setMessage(TestAllTypes.newBuilder()
 147         .setOptionalInt32(10)
 148         .buildPartial());
 149     builder.mergeFrom(TestAllTypes.newBuilder()
 150         .setOptionalDouble(5.0)
 151         .buildPartial());
 152     assertEquals(10, builder.getMessage().getOptionalInt32());
 153     assertEquals(5.0, builder.getMessage().getOptionalDouble());
 154   }
 155 }