Create a new base class (ie; ValueObject<PropertyType>) that can be inherited to create a value object concrete definition.

Value objects are a core concept of DDD and represent things that are identified by their value rather than their hash/id/reference etc. See: https://martinfowler.com/bliki/ValueObject.html

There're already some examples on the web on this practice in typescript (eg h

The test could be similar to https://github.com/CodelyTV/php-ddd-skeleton/blob/master/tests/src/Shared/Infrastructure/Bus/Event/MySql/MySqlDoctrineEventBusTest.php :)