Add a test which ensures namespaced roots.
Add a test which ensures namespaced roots.

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-Zhang/rails,starknx/rails,marklocklear/rails,Vasfed/rails,MichaelSp/rails,travisofthenorth/rails,prathamesh-sonpatki/rails,riseshia/railsguides.kr,samphilipd/rails,aditya-kapoor/rails,iainbeeston/rails,tgxworld/rails,kamipo/rails,arjes/rails,georgeclaghorn/rails,kirs/rails-1,gcourtemanche/rails,yawboakye/rails,riseshia/railsguides.kr,kamipo/rails,rbhitchcock/rails,MSP-Greg/rails,illacceptanything/illacceptanything,assain/rails,gfvcastro/rails,brchristian/rails,rails/rails,bogdanvlviv/rails,kmcphillips/rails,esparta/rails,kmcphillips/rails,baerjam/rails,richseviora/rails,vipulnsward/rails,kmcphillips/rails,riseshia/railsguides.kr,yahonda/rails,elfassy/rails,Erol/rails,utilum/rails,tijwelch/rails,illacceptanything/illacceptanything,joonyou/rails,kenta-s/rails,odedniv/rails,deraru/rails,Vasfed/rails,assain/rails,ttanimichi/rails,flanger001/rails,kamipo/rails,mijoharas/rails,Spin42/rails,EmmaB/rails-1,betesh/rails,repinel/rails,koic/rails,Envek/rails,stefanmb/rails,amoody2108/TechForJustice,kachick/rails,assain/rails,baerjam/rails,schuetzm/rails,mathieujobin/reduced-rails-for-travis,georgeclaghorn/rails,richseviora/rails,yalab/rails,kachick/rails,mtsmfm/railstest,Erol/rails,deraru/rails,Spin42/rails,MSP-Greg/rails