test(defined): create tests for defined()

[velvetrevolver]

Review by commits, DO NOT SQUASH.

Create tests for defined()

• fix for defined() when parameter is an array.

issue XO-163

[b-Nollet]

It's probably not a big problem, but if we don't squash the commits then on the first commit the test description lines 10 and 14 don't describe the test correctly.

[velvetrevolver]

It's probably not a big problem, but if we don't squash the commits then on the first commit the test description lines 10 and 14 don't describe the test correctly.

Yes, in the first commit the comment doesn't match the test. It's actually to validate the current behavior of defined() so that the test passes, even though this behavior doesn't correspond to what is really expected (hence the fix).

But I can change it if it's an issue.

[b-Nollet]

It's probably not a big problem, but if we don't squash the commits then on the first commit the test description lines 10 and 14 don't describe the test correctly.

Yes, in the first commit the comment doesn't match the test. It's actually to validate the current behavior of defined() so that the test passes, even though this behavior doesn't correspond to what is really expected (hence the fix).

But I can change it if it's an issue.

I don't know if it's worth changing or not, let's get @fbeauchamp's opinion.

[fbeauchamp]

Please check in the github CI that theses tests are really ran
(last run is :
https://github.com/vatesfr/xen-orchestra/actions/runs/10778481900/job/29889906516 and I don't see defined here since the package.json entry is missing )

[fbeauchamp]

PLease rebase so that w have one commit for the fix, on one for the test