[threeten-dev] Please help to review new test code for java.time.Duration

[patrick zhang]

Hi Team,

Please help to review new test cases for java.time.Duration.
Impacted method list is bleow.  

minusDays()
minusHours()
minusMinutes()
plusDays()
plusHours()
plusMinutes()
withNanos()
withSeconds()
toDays()
toHours()
toMinutes()  

webrev:
http://cr.openjdk.java.net/~pzhang/JSR310/java/time/Duration/webrev/

test result:
http://cr.openjdk.java.net/~pzhang/JSR310/java/time/Duration/TCKDuration.jtr

Regards
Patrick