Consider functions hidden by a signature file as private.

[nojaf]

Hi @MangelMaxime, thanks for the pointer in #3528.

I was able to resolve the problem, but I'm unsure about how I can add a proper test for this.
Any thoughts?

[MangelMaxime]

Hum, it is true that we don't have syntax tests, you can perhaps create one for this one. Like you store in a file somewhere the expected generated file and compare it to the actual generated file.

The other solution feels a lot more hacky to me.

1. Have a signature file + function definition
2. Use dynamic import to import the non exported definition
3. Catch the exception and say that all good this is expected to not be exposed.

[nojaf]

@MangelMaxime, thanks I made an attempt at having something that asserts expected output.
I'm not that familiar with Expecto, so feel free to point out where things can improve.

[MangelMaxime]

Thank you @nojaf,

I will have a look at it later this week.