in 4.24 release, New: Network Engine Test Suite You can create a network test by extending AFunctionalNetTest, then create steps for that test by extending UFunctionalTestStep for each one. Each test step must be designated as a Server or Client step, then added to the Test. You can then run a test by placing it in a level.
where can I find AFunctionalNetTest or UFunctionalTestStep?
I cannot find any sample project or classes in engine source.