Spring Different behavior between RestTestClient and WebTestClient

There is an inconsistency between WebTestClient and RestTestClient when the controller does not return any body. exec("/empty").returnResult().getResponseBody() in WebTestClient returns an empty byte[] while RestTestClient returns null.

See the reproducer here https://github.com/lukas-krecan/JsonUnit/compare/reproducer?expand=1

It's not a big deal, feel free to close it if it is intentional. I was just a bit surprised by that and thought you may not be aware.

Comment From: rstoyanchev

There are some recent related changes in #35399, so worth using snapshots.

That said, I'm getting null with .exchange().expectBody().returnResult().getResponseBody() even with WebTestClient, which makes sense given the call to bodyToMono and block, which returns null if the Mono completes empty as a result of a response without any buffers.

I didn't try checking out the repository yet to see what's different.