tests: make array_oop actually test something

[vil02]

Description

This PR make the test of array to actually check something.

Checklist

• A description of the changes in this PR is mentioned above.
• All the new and existing tests pass.
• The code follows the code style and conventions of the project.
• No plagiarized, duplicated, or repetitive code that has been directly copied from another source.
• I have read the whole Contributing guidelines of the project and its resources/related pages.

Screenshots (if any)

Note to reviewers

Add some asserts to array test.

[mertcandav]

LGTM. As a side note, this tests to check whether compiler can compile actually, not to check whether arrays woks correct.

Thanks for your contribution.

[vil02]

As a side note, this tests to check whether compiler can compile actually, not to check whether arrays woks correct.

In this case I would leave the print statements (together with asserts).