A new version of KernelTests was added to project The Inbox:
http://source.squeak.org/inbox/KernelTests-pad.210.mcz

==================== Summary ====================

Name: KernelTests-pad.210
Author: pad
Time: 10 May 2012, 5:15:41.797 pm
UUID: 4ed47317-36b9-4777-9e44-591a5d72039b
Ancestors: KernelTests-nice.209

If Nicolas Cellier's new DateAndTime>>#hash is accepted then these tests need to be changed

DateAndTimeEpochTest>>#testHash
DateAndTimeLeapTest>>#testHash
TimespanTest>>#testHash 

And I added the test he used to show how the other hash I proposed was suboptimal.

=============== Diff against KernelTests-nice.209 ===============

Item was changed:
  ----- Method: DateAndTimeEpochTest>>testHash (in category 'testing') -----
  testHash
  	self assert: aDateAndTime hash =    DateAndTime new hash.
+ 	self assert: aDateAndTime hash =     112557138
- 	self assert: aDateAndTime hash =    32161486
  !

Item was changed:
  ----- Method: DateAndTimeLeapTest>>testHash (in category 'testing') -----
  testHash
+ 	self assert: aDateAndTime hash =      16256473
- 	self assert: aDateAndTime hash =     131156085
  !

Item was added:
+ ----- Method: DateAndTimeTest>>testHash (in category 'Tests') -----
+ testHash
+ | date1 date2 |
+ date1 := DateAndTime new ticks: (DateAndTime unixEpoch + 1 hours)
+ ticks offset: 0 hours.
+ date2 := DateAndTime new ticks: (DateAndTime unixEpoch - 2 hours)
+ ticks offset: -3 hours.
+ self assert: (date1 = date2) ==> [date1 hash = date2 hash]!

Item was changed:
  ----- Method: TimespanTest>>testHash (in category 'testing') -----
  testHash
+ 	self assert: aTimespan hash  =      259476428
- 	self assert: aTimespan hash =     101198424
  	"must be a more meaningful test?"!