Improve the package testing process

[ismael-lajaaiti]

Originally posted by @iago-lito in #147 (comment)

Yikes! Consider taking time to set up a proper sandbox environment in this case, or you'll spend ages running ] test over and over. :(
I start my sandbox script with things like:

using Test
using Random
using Revise
using EcologicalNetworksDynamics
include("PATH/TO/REPO/test/test_failures.jl")
include("PATH/TO/REPO/test/dedicate_test_failures.jl")
const EN = EcologicalNetworksDynamics # Required by some tests.

So I can then run tests line by line in a corresponding REPL.

Unfortunately, this is not exactly stable or exposed yet. But maybe it should eventually make its way to the CONTRIBUTING file :\

Also, feel free to (temporarily) comment out tests from ./test/runtests.jl or specify unique test files to run here.

[iago-lito]

Good, thank you :) Unfortunately, the tests structure is very unstable yet and it cannot be exposed. There is no plan to stabilize it in the near future, and the hack described above will likely not work for all tests. What we can maybe do for now is to use this thread to provide help/support whenever someone has trouble writing tests for the package?