start again
create dueDate object
checks that  submitDate is an instance of Date
check that submitdate is within working hours
check that value of turnaroundTime is a whole number
throw exception if submitDate is not a date object
throw exception if submitDate is not within working hours
throw exception if turnaroundTime is not a whole number
copy date
set submit date property
set turnaroundTime property
put validation in init method
create SubmitDate class
set starting hours of submitDate
check if a day if Saturday by the distance from submit date
get distance of the next working hour
get distance of the nth working hour if n<=8
get due date
refactoring
Merge branch 'behaviour'
to keep master up-to-date