python regression tests - a monster hammer to keep wine "in check" :)

[Luke Kenneth Casson Leighton]

On Sun, Jan 18, 2009 at 4:52 PM, Hin-Tak Leung <hintak_leung at yahoo.co.uk> wrote:
> --- On Sun, 18/1/09, Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote:
>
>>  the regression test test_file.py has succeeded for years
>> under
>> proprietary native win32 platforms using the proprietary
>> msvc compiler
>> to build python.exe and python2N.dll for win32 platforms.
>>
>>  this particular test is therefore about testing and
>> ensuring that
>> \r\n handling SPECIFICALLY in O_TEXT mode is
>> correct.
>>
>>  it has nothing to do with O_BINARY mode.
>
> I already wrote that the default translation behavior (if not explicitly specified) is both compiler and runtime dependent.

 nope, it's not.

> The fact that msvc-compiled python working in native win32 is rather different from mingw-compiled python working in wine, isn't it?

 nope,  not in the slightest bit.


>It differs both in the compiler used

 no, it doesn't.  i'm using exactly the same compiler that is used by
rouman petrov, as described in http://bugs.python.org/issue3871

 this is not "compile under linux and link with -lwine".

 this is "compile using mingw32.exe running under msys to EXACTLY
emulate the EXACT same compile as if running under win32".



> and the runtime used.

 .... is msvcrt and is, on wine, endeavouring to be _exactly_ the same.

therefore, this is testing msvcrt.

therefore, the bugs are in wine's implementation of msvcrt.

specifically, the O_TEXT handling.

and then some.  ftell, fseek with SEEK_END after an fread - there's
tons of "little" bugs.


> From my experience if my memory serves (in the above bug report), Borland's compiler by-default generate code which is asymetrical - the reading code won't read what the writing code writes, in either windows or wine or both; that was very surprising to me.

 well, i'm not using borland's compiler, i'm using mingw32, running it
under msys+wine, so it is "exactly as if compiling on a windows
system".

 l.