Using custom modules in Julia 1.8.2 - julia

Question

I have the following module:
module TestModule
export foo
function foo()
return 1
end
end
and a calling script:
using .TestModule
println(foo())
I get the following error:
ERROR: UndefVarError: TestModule not defined
According to the documentation this should work. I know this can be accomplished via include() but I read that this can cause inconsistencies when trying to include the module multiple times. Another way of achieving this seems to be editing the LOAD_PATH but that seems rather inconvenient and also causes the project to not be portable.
I'm wondering if those are the only current solutions to the problem or if there is something better (The two other post regarding this question are 6+ years old and the docs currently state that this is the way to do it, so I wonder if the problem has been fixed by now). Any help is greatly appreciated.
Cheers

Answer 1

I'm closing this thread as it has been tagged a duplicate multiple times now. I conclude from this that there currently is no way of splitting code into multiple local modules while maintaining portability. The canonical way of splitting code into modules is by adding the module paths to the LOAD_PATH (julia push!(LOAD_PATH, "\path\to\module")). Thanks to everyone for the feedback nonetheless!
Edit:
After executing the TestModule file it works for this example (I missed that this was necessary, at least in VSCode). My actual program still produces module-not-found errors but since I'm unable to reproduce them in a simple example I'll try figuring it out myself first.
Another Edit:
Renaming the modules solved the problem. I suppose the names were already taken by public packages. For any reader wondering how to solve this problem without renaming the custom module, please have a look at this documentation
Cheers