public void TestMessageMissingExtensions()
{
TestXmlMessage original = TestXmlMessage.CreateBuilder()
.SetValid(true)
.SetText("text")
.SetExtension(UnittestExtrasXmltest.ExtensionText, " extension text value ! ")
.SetExtension(UnittestExtrasXmltest.ExtensionMessage, new TestXmlExtension.Builder().SetNumber(42).Build())
.AddExtension(UnittestExtrasXmltest.ExtensionNumber, 100)
.AddExtension(UnittestExtrasXmltest.ExtensionNumber, 101)
.AddExtension(UnittestExtrasXmltest.ExtensionNumber, 102)
.SetExtension(UnittestExtrasXmltest.ExtensionEnum, EnumOptions.ONE)
.Build();
TestXmlMessage message = original.ToBuilder()
.ClearExtension(UnittestExtrasXmltest.ExtensionText)
.ClearExtension(UnittestExtrasXmltest.ExtensionMessage)
.ClearExtension(UnittestExtrasXmltest.ExtensionNumber)
.ClearExtension(UnittestExtrasXmltest.ExtensionEnum)
.Build();
JsonFormatWriter writer = JsonFormatWriter.CreateInstance();
writer.WriteMessage(original);
Content = writer.ToString();
IMessageLite copy = JsonFormatReader.CreateInstance(Content)
.Merge(message.CreateBuilderForType()).Build();
Assert.AreNotEqual(original, message);
Assert.AreNotEqual(original, copy);
Assert.AreEqual(message, copy);
}