Answer Happy

Consider the following interface for an ADT for representing intervals (periods of time as opposed to instantaneous moments of time). typedef long Duration; // measured in seconds class DateTime { public: DateTime (int year, int month, int day, int hour, int minute, int second); }; // How many seconds between two times? Duration operator- (const DateTime& right) const; class Interval { public: // An interval is a period of time beginning with a starting time // and running up to, but not including, its stop time. Interval (); Interval (DateTime start, DateTime stop); Interval (DateTime start, Duration length); DateTime getStart() const; void setStart (DateTime); DateTime getStop() const; void setStop (DateTime); Duration getDuration(); bool contains (DateTime d); bool overlaps (Interval intrvl); bool operator= (const Interval& other) const; private: DateTime theStart, theStop; }; Using the JUnit style, write a self-checking test for the setStop function.