Add additional tests from Ruby version.
Add additional tests from Ruby version.

nicgallardo/xjavascript,schorsch3000/xjavascript,Vontei/Xjavascript-Solutions,eloquence/xjavascript,cloudleo/xjavascript,eloquence/xjavascript,Vontei/Xjavascript-Solutions,exercism/xjavascript,marcCanipel/xjavascript,a25patel/xjavascript,JenanMannette/xjavascript,nicgallardo/xjavascript,a25patel/excercismExcercises,ZacharyRSmith/xjavascript,wobh/xjavascript,a25patel/excercismExcercises,exercism/xjavascript,Vontei/xjavascript,wobh/xjavascript,cloudleo/xjavascript,marcCanipel/xjavascript,JenanMannette/xjavascript,ZacharyRSmith/xjavascript,Vontei/xjavascript,schorsch3000/xjavascript,a25patel/xjavascript