public void DynamicMessageCopy()
{
TestAllTypes.Builder builder = TestAllTypes.CreateBuilder();
TestUtil.SetAllFields(builder);
TestAllTypes message = builder.Build();
DynamicMessage copy = DynamicMessage.CreateBuilder(message).Build();
reflectionTester.AssertAllFieldsSetViaReflection(copy);
// Oneof
FieldDescriptor bytesField =
TestAllTypes.Descriptor.FindFieldByName("oneof_bytes");
FieldDescriptor uint32Field =
TestAllTypes.Descriptor.FindFieldByName("oneof_uint32");
Assert.True(copy.HasField(bytesField));
Assert.False(copy.HasField(uint32Field));
DynamicMessage.Builder dynamicBuilder = DynamicMessage.CreateBuilder(message);
dynamicBuilder[uint32Field] = 123U;
DynamicMessage copy2 = dynamicBuilder.Build();
Assert.IsFalse(copy2.HasField(bytesField));
Assert.IsTrue(copy2.HasField(uint32Field));
Assert.AreEqual(123U, copy2[uint32Field]);
}
