On Wednesday, 30 April 2014 at 18:19:34 UTC, Jonathan M Davis via
Digitalmars-d wrote:
On Wed, 30 Apr 2014 17:58:34 +0000
Atila Neves via Digitalmars-d <[email protected]>
wrote:
Unit tests though, by definition (and I'm aware there are more
than one) have to be independent. Have to not touch the
filesystem, or the network. Only CPU and RAM.
I disagree with this. A unit test is a test that tests a single
piece
of functionality - generally a function - and there are
functions which
have to access the file system or network.
They _use_ access to file system or network, but it is _not_
their functionality. Unit testing is all about verifying small
perfectly separated pieces of functionality which don't depend on
correctness / stability of any other functions / programs. Doing
I/O goes against it pretty much by definition and is
unfortunately one of most common testing antipatterns.
