Add tests in Dagger for brokers

[lerenn]

There is tests for brokers in extensions but there is no execution right now.

This should be added in Dagger.

[magraef]

Why do we run each test file using Dagger in a single container and create a map beforehand with selected tests? Wouldn't it be easier to just run all the tests at once using go test -v ./... to avoid future problems and issues like this?

[lerenn]

I have done that to be able to execute specific tests and not the whole set. I had in mind the fact that I could run the tests on different machines if they were too many of them.

But in the end, that was a silly idea, I prefer the go test -v ./... approach and we can still have another mechanism to execute a specific test.

[magraef]

Maybe we could add a optional parameter to the dagger test function to run a specific test and per default we can use ./...

[lerenn]

Yup, I think that's the best option !