JustTestingThis
Hmm. I think it only matters to me that the author picks one and stays with it. But that means that all libraries he uses has to use the same one. Which is why languages tend to prefer one over the other. e.g. Java using CaMeLcAsE
To have them mixed in one code base would be like a micro context switch.
It's "justTestingThis" not "JustTestingThis" if we are talking camel case.
So yeah, camel case and case sensitivity add unnecessary fragility to programming. Which is the reason I don't like the fad. You accidentally made my case.
It's useful.
just-testing-this ---> just_testing_this
JustTestingThis ---> justTestingThis
The second one is less dramatic but the first one would in most languages subtract testing and this from just.