public void DynamicOneofMessage()
{
DynamicMessage.Builder builder =
DynamicMessage.CreateBuilder(TestAllTypes.Descriptor);
OneofDescriptor oneof = TestAllTypes.Descriptor.Oneofs[0];
Assert.False(builder.HasOneof(oneof));
Assert.AreSame(null, builder.OneofFieldDescriptor(oneof));
reflectionTester.SetAllFieldsViaReflection(builder);
Assert.True(builder.HasOneof(oneof));
FieldDescriptor field = oneof.Field(3);
Assert.AreSame(field, builder.OneofFieldDescriptor(oneof));
Assert.AreEqual(TestUtil.ToBytes("604"), builder[field]);
DynamicMessage message = builder.BuildPartial();
Assert.IsTrue(message.HasOneof(oneof));
DynamicMessage.Builder mergedBuilder =
DynamicMessage.CreateBuilder(TestAllTypes.Descriptor);
FieldDescriptor mergedField = oneof.Field(0);
mergedBuilder[mergedField] = 123U;
Assert.IsTrue(mergedBuilder.HasField(mergedField));
mergedBuilder.MergeFrom(message);
Assert.IsTrue(mergedBuilder.HasField(field));
Assert.IsFalse(mergedBuilder.HasField(mergedField));
mergedBuilder.ClearOneof(oneof);
Assert.AreSame(null, mergedBuilder.OneofFieldDescriptor(oneof));
message = mergedBuilder.Build();
Assert.AreSame(null, message.OneofFieldDescriptor(oneof));
}
