[fpc-devel] Definition of the time-fration in a TDateTime before 30/12/1899

[Michael Van Canneyt]

On Mon, 22 May 2006, Graeme Geldenhuys wrote:

> On 5/22/06, Bram Kuijvenhoven <kuifwaremailinglists at xs4all.nl> wrote:
>> I guess we will need plenty of unit tests to make sure all the functions 
> work consistent, in particular also for dates close to and before 29-12-1899 
> :)
>>
>> (Note: I sent some mail explaining the TryEncodeDateTime function some time 
> ago (21-4-2006), on Graeme's request. I also mentioned an overflow problem in 
> that code + how to fix. Perhaps this fix can be integrated into the code as 
> well.)
>>
>
> Hi Bram,
>
> Yeah, I had my share of uphill battles with old dates (Delphi and
> FPC).  I works fine with recent dates, but don't venture to far off!!
>
> I already have a collection of unit tests for dates, which is
> incorporated into our products unit tests.  We use fpcUnit
> extensively.  I could always extend those tests a bit more, but as far
> as I understand, FPC developers dont' use fpcUnit, but rather some
> custom testing framework.

1. fpcunit didn't exist at the time the FPC tests were implemented.
2. Using FPCunit creates a dependency on it. The tests can run mostly
    with only the system unit...

Michael.