Allow the JUnit 5 extension to be registered with @RegisterExtension

[RomanJRW]

In Optimize, we make use of a number of extensions. We prefer to be explicit as to the order in which they are registered, as there are sometimes unfortunate dependencies between their responsibilities. It would be great if the EzeExtension could also be registered in such a way, so that we could give it an explicit @Order(x) too.

We also instantiate extensions differently depending on the type of test class (beforeAllMode vs beforeEachMode etc.). I can imagine us having some wrapper extension around the EZE extension that gives us similar behaviour. Access to the EZE extension as an instance field would also be useful for this.

[saig0]

@RomanJRW thank you for raising this up.

You can register the EzeExtension as a normal JUnit 5 extension.

The annotation @EmbeddedZeebeEngine is just a shortcut that registers the extension by @ExtendWith(EzeExtension::class).

Does this work for you?
What else do you need?

[RomanJRW]

Thanks @saig0 🙂

Is it also possible to register the extension as a class variable though? We would typically do something like this:

  @RegisterExtension
  @Order(5)
  protected ZeebeExtension zeebeExtension = new ZeebeExtension();

[saig0]

@RomanJRW yes, that is possible.

class EzeExtensionTest {

    @RegisterExtension
    private val eze = EzeExtension()

    private lateinit var zeebe: ZeebeEngine
    private lateinit var client: ZeebeClient
    private lateinit var clock: ZeebeEngineClock
    private lateinit var recordStream: RecordStreamSource

    // ...