public void testParseExtensions() throws Exception {
// TestAllTypes and TestAllExtensions should have compatible wire formats,
// so if we serealize a TestAllTypes then parse it as TestAllExtensions
// it should work.
TestAllTypes message = TestUtil.getAllSet();
ByteString rawBytes = message.toByteString();
ExtensionRegistry registry = ExtensionRegistry.newInstance();
TestUtil.registerAllExtensions(registry);
registry = registry.getUnmodifiable();
TestAllExtensions message2 = TestAllExtensions.parseFrom(rawBytes, registry);
TestUtil.assertAllExtensionsSet(message2);
}