Reduce code size with array and loop for rspec test

[MartinGoulet]

@acmetech @dominicgoulet I want to know if it's a good idea to use loop with array in spec test to minimise the number of code line. I send you this request as an example.

[acmetech]

Hey @MartinGoulet,

I prefer to leave things as discoverable/readable as possible in the tests. By using the shoulda-matchers we are already shortening the code significantly and maintaining/increasing readability.

The 'attribute accessor' tests should ideally be fleshed out to test the functionality of the method, not just test for its presence.

Thanks