Tango file i/o

[Lars Ivar Igesund]

Jason House wrote:

> torhu wrote:
> 
>> Jason House wrote:
>>> I'm having trouble writing a unit test to check code that communicates
>>> via
>>> standard in and standard out.  Attached to this post is my a reduced
>>> form
>>> of my problems.  Can anyone tell me what's going wrong? (The assert in
>>> the code fails)
>> 
>> You need to rewind the file before starting to read after writing:
>> 
>> fakeConsole.seek(0);
> 
> I interpret that to mean that writing to the file affects the read stream
> and reading affects the write stream.  I need to decouple those because
> reading and writing should be more or less independent of each other.

Yes, because your TempFile is a Conduit that provides both the input and
output stream.

> 
> It sounds like if I open up a file twice, once for writing and once for
> reading, that I can get independent access into the file.  

Yes.

> The real test 
> is
> multi-threaded with reading and writing done asynchronously.  With
> independent file classes, will EOF be a problem?  AKA, if a read occurs
> when a write is in progress.

You should lock your resources (files) while writing.

-- 
Lars Ivar Igesund
blog at http://larsivi.net
DSource, #d.tango & #D: larsivi
Dancing the Tango