[squeak-dev] The Inbox: Chronology-Tests-dtl.15.mcz
Chris Muller
asqueaker at gmail.com
Thu Jan 17 02:55:32 UTC 2019
That is not a reason to not cache #getSeconds. Invalidation is a
standard feature of any cache. For the case you mention, the app
would simply invalidate its cache, after it had benefitted from
billions and billions of accesses to it... :)
On Sat, Jan 12, 2019 at 9:52 AM <commits at source.squeak.org> wrote:
>
> David T. Lewis uploaded a new version of Chronology-Tests to project The Inbox:
> http://source.squeak.org/inbox/Chronology-Tests-dtl.15.mcz
>
> ==================== Summary ====================
>
> Name: Chronology-Tests-dtl.15
> Author: dtl
> Time: 12 January 2019, 10:52:06.856687 am
> UUID: 93d70832-de59-4f2a-8516-b98262941370
> Ancestors: Chronology-Tests-dtl.14
>
> Add testGetSeconds to verify that getSeconds represents whole seconds in the local time zone. For a given instance of DateAndTime, changing the time zone offset changes the local representation, but does not affect magnitude (time since a defiined epoch). Therefore, if time zone offset changes, the asSeconds value should not change, and the getSeconds value should change to reflect local timezone.
>
> =============== Diff against Chronology-Tests-dtl.14 ===============
>
> Item was added:
> + ----- Method: DateAndTimeTest>>testGetSeconds (in category 'Tests') -----
> + testGetSeconds
> + "Verify that getSeconds represents whole seconds in the local time zone. For
> + a given instance of DateAndTime, changing the time zone offset changes the
> + local representation, but does not affect magnitude (time since a defiined
> + epoch). Therefore, if time zone offset changes, the asSeconds value should
> + not change, and the getSeconds value should change to reflect local timezone."
> +
> + | dt s1 id stSeconds seconds1 seconds2 |
> + s1 := '2019-01-12T10:07:05.18743-05:00'.
> + dt := s1 asDateAndTime.
> + self assert: 18000 seconds negated equals: dt offset.
> + seconds1 := dt getSeconds.
> + self assert: 36425 equals: seconds1.
> + id := dt identityHash.
> + stSeconds := dt asSeconds.
> + dt makeUTC. "make the receiver's timezone GMT, do not change magnitude"
> + self assert: id equals: dt identityHash. "same object, not a copy"
> + self assert: '2019-01-12T15:07:05.18743+00:00' equals: dt asString.
> + self assert: stSeconds equals: dt asSeconds. "magnitude unchanged"
> + self assert: '2019-01-12T10:07:05.18743-05:00' asDateAndTime equals: dt. "still equal"
> + seconds2 := dt getSeconds.
> + self deny: seconds1 equals: seconds2.
> + self assert: 54425 equals: seconds2.
> +
> + !
>
>
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