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On 05/03/2010 00:19, Ryan Freckleton wrote:
<blockquote
cite="mid:318072441003041619s166c3dcaqb676afc4f4425438@mail.gmail.com"
type="cite">On Thu, Mar 4, 2010 at 3:33 PM, Michael Foord <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:fuzzyman@voidspace.org.uk">fuzzyman@voidspace.org.uk</a>></span>
wrote:<br>
<div class="gmail_quote">
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<div class="im">On 04/03/2010 22:03, Ryan Freckleton wrote:
<blockquote type="cite">On Wed, Mar 3, 2010 at 12:15 PM, Michael
Foord <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:fuzzyman@voidspace.org.uk" target="_blank">fuzzyman@voidspace.org.uk</a>></span>
wrote:<br>
<snip><br>
<div class="gmail_quote">
<div> </div>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Once
Holger
and Benjamin have worked on their ast transformation code it
should be possible to add this to simpletest for better failure
messages with plain asserts.<br>
</blockquote>
<div><snip><br>
<br>
Does that mean we're going to get pretty asserts through ast
transforms? As in:<br>
</div>
</div>
</blockquote>
<br>
</div>
Well, not in unittest itself but in some extension of unittest...<br>
<br>
</div>
</blockquote>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000">There is an implementation
that could be adapted fairly easily:<br>
<br>
<a moz-do-not-send="true"
href="http://bitbucket.org/hpk42/py-trunk/src/tip/py/_code/_assertionnew.py"
target="_blank">http://bitbucket.org/hpk42/py-trunk/src/tip/py/_code/_assertionnew.py</a><br>
<br>
This uses the ast module which is new in Python 2.6, but it could be
backported to use _ast for Python 2.5. There is also an old version
called "<span>_assertionold.py" that uses the compiler
module present in Python 2.4.<br>
</span></div>
</blockquote>
<div><br>
Cool, I'll look at that in detail.<br>
</div>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000"><span><br>
There is also code in nose that does something similar (stack
introspection rather than ast transformation I *believe*) in nose. If
unittest had a good extension API this could just be implemented as a
unittest extension...<br>
<br>
</span></div>
</blockquote>
<div><br>
Thanks for the pointers, once I get some more free cycles I'll try to
implement a "pretty asserts" module. Hopefully it can end up being one
of the first unittest2 extensions :)<br>
<br>
</div>
</div>
</blockquote>
<br>
It will need the extensibility mechanism in place to be generally
usable with unittest2. <br>
<br>
For simpletest you could wrap it around the functions easily enough -
catching AssertionError and then doing the ast transform and rerun,
raising a 'better' exception on failure. When I say easily enough that
is for some unspecified value of 'easily' of course (the wrapping is
easy it is untangling the ast transform code from py.test that will
take a little bit of work)...<br>
<br>
Anyway - I'll be interested in what you come up with.<br>
<br>
Michael<br>
<br>
<blockquote
cite="mid:318072441003041619s166c3dcaqb676afc4f4425438@mail.gmail.com"
type="cite">
<div class="gmail_quote">
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000"><span>All the best,<br>
<font color="#888888"><br>
Michael </font></span><br>
</div>
</blockquote>
<div><br>
=====<br>
--Ryan E. Freckleton <br>
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</blockquote>
<br>
<br>
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