Improve test coverage for publications index page.
Improve test coverage for publications index page.

Specifically to cover more scenarios where consultations are included
alongside publications.

askl56/whitehall,hotvulcan/whitehall,ggoral/whitehall,YOTOV-LIMITED/whitehall,hotvulcan/whitehall,YOTOV-LIMITED/whitehall,robinwhittleton/whitehall,alphagov/whitehall,ggoral/whitehall,YOTOV-LIMITED/whitehall,ggoral/whitehall,robinwhittleton/whitehall,hotvulcan/whitehall,askl56/whitehall,robinwhittleton/whitehall,ggoral/whitehall,alphagov/whitehall,YOTOV-LIMITED/whitehall,alphagov/whitehall,hotvulcan/whitehall,askl56/whitehall,robinwhittleton/whitehall,askl56/whitehall,alphagov/whitehall