refactor test to use let
refactor test to use let

instead of instance variables
(#6192)

KentShikama/diaspora,Muhannes/diaspora,diaspora/diaspora,Flaburgan/diaspora,jhass/diaspora,Amadren/diaspora,KentShikama/diaspora,spixi/diaspora,diaspora/diaspora,Muhannes/diaspora,SuperTux88/diaspora,jhass/diaspora,Flaburgan/diaspora,Amadren/diaspora,despora/diaspora,SuperTux88/diaspora,despora/diaspora,diaspora/diaspora,Flaburgan/diaspora,Flaburgan/diaspora,SuperTux88/diaspora,spixi/diaspora,geraspora/diaspora,SuperTux88/diaspora,diaspora/diaspora,Muhannes/diaspora,geraspora/diaspora,spixi/diaspora,despora/diaspora,jhass/diaspora,geraspora/diaspora,spixi/diaspora,Amadren/diaspora,Amadren/diaspora,KentShikama/diaspora,geraspora/diaspora,despora/diaspora,KentShikama/diaspora,Muhannes/diaspora,jhass/diaspora