added tests for utils' isJsFile()
added tests for utils' isJsFile()

n1k0/casperjs,sircelsiussexy/casperjs,hexid/casperjs,mickaelandrieu/casperjs,pcarrier-packaging/deb-casperjs,sircelsiussexy/casperjs,alexbiehl/casperjs,vietch2612/casperjs,RobertoMalatesta/casperjs,davidwhthomas/casperjs,muntasir2000/casperjs,jamesanthonyferguson/casperjs,RobertoMalatesta/casperjs,JZL/casperjs,soundyogi/casperjs,PeterWangPo/casperjs,hexid/casperjs,vietch2612/casperjs,hlr1983/casperjs,ravindrasingh22/casperjs,alexbiehl/casperjs,jefleponot/casperjs,soundyogi/casperjs,vladikoff/casperjs,flyHe/casperjs,vladikoff/casperjs,dj31416/casperjs,alexbiehl/casperjs,pbrazdil/casperjs,joshuafcole/casperjs,soundyogi/casperjs,JZL/casperjs,sircelsiussexy/casperjs,n1k0/casperjs,casperjs/casperjs,ravindrasingh22/casperjs,mickaelandrieu/casperjs,davidwhthomas/casperjs,alexbiehl/casperjs,jamesanthonyferguson/casperjs,mcwonka/casperjs,artillery/casperjs,joshuafcole/casperjs,Andrey-Pavlov/casperjs,singhdev/casperjs,n1k0/casperjs,soundyogi/casperjs,artillery/casperjs,jjyycchh/casperjs,RobertoMalatesta/casperjs,mcwonka/casperjs,pcarrier-packaging/deb-casperjs,RobertoMalatesta/casperjs,HienLeThi/Casperjs_Demo,hlr1983/casperjs,PeterWangPo/casperjs,Andrey-Pavlov/casperjs,JZL/casperjs,istr/casperjs,mickaelandrieu/casperjs,muntasir2000/casperjs,HienLeThi/Casperjs_Demo,HienLeThi/Casperjs_Demo,HienLeThi/Casperjs_Demo,hlr1983/casperjs,hexid/casperjs,pbrazdil/casperjs,mickaelandrieu/casperjs,mcwonka/casperjs,linkedin/casperjs,vietch2612/casperjs,kyroskoh/casperjs,Andrey-Pavlov/casperjs,cryptoquick/casperjs,cryptoquick/casperjs,istr/casperjs,singhdev/casperjs,PeterWangPo/casperjs,jjyycchh/casperjs,istr/casperjs,mcwonka/casperjs,jjyycchh/casperjs,casperjs/casperjs,muntasir2000/casperjs,singhdev/casperjs,singhdev/casperjs,n1k0/casperjs,davidwhthomas/casperjs,dj31416/casperjs,istr/casperjs,jjyycchh/casperjs,ravindrasingh22/casperjs,mickaelandrieu/casperjs,linkedin/casperjs,hexid/casperjs,kyroskoh/casperjs,artillery/casperjs,pbrazdil/casperjs,jefleponot/casperjs,alexbiehl/casperjs,jamesanthonyferguson/casperjs,jefleponot/casperjs,hlr1983/casperjs,pbrazdil/casperjs,casperjs/casperjs,jefleponot/casperjs,kyroskoh/casperjs,jamesanthonyferguson/casperjs,jamesanthonyferguson/casperjs,ravindrasingh22/casperjs,jefleponot/casperjs,linkedin/casperjs,pbrazdil/casperjs,joshuafcole/casperjs,flyHe/casperjs,istr/casperjs,dj31416/casperjs,flyHe/casperjs,cryptoquick/casperjs,jjyycchh/casperjs,PeterWangPo/casperjs,casperjs/casperjs,casperjs/casperjs,hlr1983/casperjs,casperjs/casperjs,muntasir2000/casperjs,vietch2612/casperjs,pcarrier-packaging/deb-casperjs,hudl/casperjs,sircelsiussexy/casperjs,joshuafcole/casperjs,hexid/casperjs,vladikoff/casperjs,pbrazdil/casperjs,alexbiehl/casperjs,kyroskoh/casperjs,artillery/casperjs,vladikoff/casperjs,vladikoff/casperjs,Andrey-Pavlov/casperjs,vietch2612/casperjs,ravindrasingh22/casperjs,dj31416/casperjs,linkedin/casperjs,dj31416/casperjs,hexid/casperjs,hlr1983/casperjs,sircelsiussexy/casperjs,mcwonka/casperjs,Andrey-Pavlov/casperjs,sircelsiussexy/casperjs,Andrey-Pavlov/casperjs,hudl/casperjs,RobertoMalatesta/casperjs,jjyycchh/casperjs,kyroskoh/casperjs,JZL/casperjs,JZL/casperjs,davidwhthomas/casperjs,singhdev/casperjs,kyroskoh/casperjs,jamesanthonyferguson/casperjs,cryptoquick/casperjs,cryptoquick/casperjs,flyHe/casperjs,PeterWangPo/casperjs,mcwonka/casperjs,flyHe/casperjs,muntasir2000/casperjs,muntasir2000/casperjs,n1k0/casperjs,jefleponot/casperjs,hudl/casperjs,davidwhthomas/casperjs,n1k0/casperjs,linkedin/casperjs,hudl/casperjs,davidwhthomas/casperjs,vietch2612/casperjs,HienLeThi/Casperjs_Demo,dj31416/casperjs,artillery/casperjs,linkedin/casperjs,PeterWangPo/casperjs,RobertoMalatesta/casperjs,istr/casperjs,HienLeThi/Casperjs_Demo,soundyogi/casperjs,joshuafcole/casperjs,pcarrier-packaging/deb-casperjs,joshuafcole/casperjs,cryptoquick/casperjs,soundyogi/casperjs,mickaelandrieu/casperjs,flyHe/casperjs,hudl/casperjs,ravindrasingh22/casperjs,artillery/casperjs,JZL/casperjs