Added more rspec tests, mostly testing value equalities
Added more rspec tests, mostly testing value equalities

MarcusLee143/CS169_Great_Course_Guide,MarcusLee143/CS169_Great_Course_Guide,MarcusLee143/CS169_Great_Course_Guide,MarcusLee143/CS169_Great_Course_Guide,MarcusLee143/CS169_Great_Course_Guide