Resolution attempt for issues bokmann#36, bokmann#45 and bokmann#83. …

…Ensure we wind to beginning of business day when using business_hours before/after methods

lib/business_time/business_days.rb

@@ -4,7 +4,7 @@ module BusinessTime
   class BusinessDays
     include Comparable
     attr_reader :days
-    
+
     def initialize(days)
       @days = days
     end
@@ -15,13 +15,18 @@ def <=>(other)
       end
       self.days <=> other.days
     end
-    
+
     def after(time = Time.current)
       days = @days
       while days > 0 || !time.workday?
         days -= 1 if time.workday?
         time = time + 1.day
       end
+      # If we have a Time or DateTime object, we can roll_forward to the
+      #   beginning of the next business day
+      if time.is_a?(Time) || time.is_a?(DateTime)
+        time = Time.roll_forward(time) unless time.during_business_hours?
+      end
       time
     end
 
@@ -34,9 +39,16 @@ def before(time = Time.current)
         days -= 1 if time.workday?
         time = time - 1.day
       end
+      # If we have a Time or DateTime object, we can roll_backward to the
+      #   beginning of the previous business day
+      if time.is_a?(Time) || time.is_a?(DateTime)
+        unless time.during_business_hours?
+          time = Time.beginning_of_workday(Time.roll_backward(time))
+        end
+      end
       time
     end
-    
+
     alias_method :ago, :before
     alias_method :until, :before
   end