Re: [Haskell-cafe] In-memory Handle for testing

On Fri, Jan 20, 2012 at 5:53 AM, Simon Hengel wrote:

For testing I want to stub handles, performing all reads and writes in memory (and in process, so no mmap).  From looking at the documentation of mkFileHandle[1], I think this should be possible.  But it requires some work.  Is there already something out there?

John Miliken has one on Hackage: http://hackage.haskell.org/package/knob I had a read-only version that I used for testing things a ways back: http://hackage.haskell.org/trac/ghc/attachment/ticket/4144/ByteStringHandle.... There might still be some things in GHC.IO.Handle that assume FD handles - I haven't tried it in a while. Antoine