Hi all, I’m thinking about creating a many-to-many association on one of my schemas like this

    many_to_many :active_foos, MyApp.Foo,
      join_through: MyApp.FooJoinTable,
      join_where: [state: :current],
      where: [state: :active],
      preload_order: [asc: :name]

The above reads like configuration - but it feels complex enough that it might merit writing a couple of sanity tests. However there’s also advice that when it comes to tests, we should be testing our own code, not the library/framework code - and it would seem that a test like this

test "correctly loads active_foos" do
   ...
end

would be testing that many_to_many works as advertised as opposed to testing that some business logic is correct.

What have others done here? Did/would you write tests like that? Or would you rather indirectly test at the call site instead (e.g. in a test for the page that renders the active_foos).

Thanks for your thoughts!