Java.time classes use a serialization proxy for the serialized form.
Several classes have been migrated to value classes when --enable-preview.
The java.time classes themselves are not serialized and cannot be deserialized.
A test that artificially creates a stream with a serialized object and tries to de-serialize it, expecting `InvalidObjectException`.

The normal deserialization sequence creates an instance and invokes `readObject`. The `readObject` method for classes with this kind of proxy explicitly throws `InvalidObjectException` if it is invoked.

For a migrated value class, the instance is not/can not be created and its `readObject` method cannot be invoked.

Attempts to deserialize a value class should generally result in an `InvalidClassException`.
Tests that attempt to deserialize a value class that is using a serialization proxy should expect to see an `InvalidClassException`.