[threeten-dev] periodUntil(Temporal, TemporalUnit) does not work properly

[patrick zhang]

Hi Team,

I am checking some functions in HijrahDate 
<../../../java/time/chrono/HijrahDate.html>, JapaneseDate 
<../../../java/time/chrono/JapaneseDate.html>, MinguoDate 
<../../../java/time/chrono/MinguoDate.html> and ThaiBuddhistDate. 
<../../../java/time/chrono/ThaiBuddhistDate.html>
It looks periodUntil(Temporal, TemporalUnit) does not work properly.

Any suggestion about it? The similar problem happens for all 4 classes.

sample code:
==========================================
        LocalDate date1 = LocalDate.of(1970, 1, 1) ;
        LocalDate date2 = LocalDate.of(1968, 2, 10) ;       
        System.out.println(date2.periodUntil(date1,ChronoUnit.DAYS)) ;
       
        MinguoDate date3 = MinguoDate.of(1970, 1, 1) ;
        MinguoDate date4 = MinguoDate.of(1968, 2, 10) ;       
        System.out.println(date4.periodUntil(date3,ChronoUnit.DAYS)) ;
==========================================

output:
==========================================
691
Exception in thread "main" java.time.DateTimeException: Unable to 
calculate period between objects of two different types
    at java.time.LocalDate.periodUntil(LocalDate.java:1517)
    at java.time.chrono.ChronoDateImpl.periodUntil(ChronoDateImpl.java:334)
    at java.time.chrono.MinguoDate.periodUntil(MinguoDate.java:96)
    at mytest.TestMinguoDate.main(TestMinguoDate.java:20)
==========================================

Regards
Patrick