test: Fix mocha/no-identical-title eslint issue

[abmusse]

Part of #289

[github-actions]

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[kadler]

There are no more identical titles, but the descriptions seem a bit terse. Is that the normal practice for Mocha?

[abmusse]

So the describe blocks are in a sense the test suite and each individual it block is the actually test case in the suite. For our tests I made describe blocks for each method of the Class to test it. In the case of ProgramCall we have the addParam and addReturn describe blocks which are pretty terse but the individual it blocks would have a the description of the actually test case. We could definetly add more detail to the describe block if we want to. From the mochajs examples I've seen this is usually the case for instance the Express test cases. Here is a list of some other examples.

[kadler]

Ok, sounds good to me.