Add test coverage for \Drupal\experience_builder\Controller\ApiComponentsController

I think this test is for the ApiComponentsController
https://git.drupalcode.org/project/experience_builder/-/blob/0.x/tests/s...

this will also give us OpenAPI validation of the response

The end-to-end tests should already run that.

That being said: I'm not opposed! 😄 We were just not writing kernel tests for every (API) controller and relying on end-to-end tests to catch blatant problems (like OpenAPI violations) instead.

I do hear from @longwave that having kernel tests made development significantly faster for him, which is why he added a kernel test for ApiLayoutController for example, in 📌 Add PHP test coverage of layout controller Active .

(This route is IIRC literally the first XB route, hence we were trying to bootstrap XB at the time — too much was unknown/changing back then to write a kernel test. Now the time is right 👍)

Maybe we add @covers to the existing test or make it follow the naming pattern of [ClassUnderTest]Test.php?

Ah it already has @covers

I think this can be closed 'works as designed' unless you're keen on having a kernel test.

ApiComponentsController is gone as of 📌 Improve or remove ComponentSourceInterface::getClientSideInfo() Active .

Quoting #3484678-23: Simplify ComponentSourceInterface::getClientSideInfo(), introduce ClientSideRepresentation value object, and leverage it → :

We should still refactor PropSourceEndpointTest into XbConfigEntityHttpApiTest::testComponent(), but there's so much cruft in there anyway that's going to have to change for 🌱 [later phase] [META] 7. Content type templates — aka "default layouts" — affects the tree+props data model Active fairly soon, that I think "just" this MR is progress enough.

Repurposing this for that.