Trial new testing practice

[arichardet]

resources of package <name> are currently tested in package <name_test>.

We are considering changing this to make tests part of their package. This would allow the use of private members instead of exposing them for testing purposes only.

This new practice will be implemented with a new resource #138. Once a determination is made on our preferred testing approach, the resource(s) will be changed.

[arichardet]

#592 and #602 have been implemented in this manner.
We need to decide whether we want testing to reside in package <name> or package <name_test>, and update accordingly.