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On 04/03/2010 22:03, Ryan Freckleton wrote:
<blockquote
cite="mid:318072441003041403j277c8cb3gd3f36e2abac77c20@mail.gmail.com"
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">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>
Well, not in unittest itself but in some extension of unittest...<br>
<br>
There is an implementation that could be adapted fairly easily:<br>
<br>
<a class="moz-txt-link-freetext" href="http://bitbucket.org/hpk42/py-trunk/src/tip/py/_code/_assertionnew.py">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 class="sd">_assertionold.py" that uses the compiler
module present in Python 2.4.<br>
<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>
All the best,<br>
<br>
Michael <br>
</span><br>
<blockquote
cite="mid:318072441003041403j277c8cb3gd3f36e2abac77c20@mail.gmail.com"
type="cite">
<div class="gmail_quote">
<div><br>
assert obj.froddle() == "baz"<br>
<br>
gets transformed into like (or at least functionally equivalent to):<br>
<br>
result = object.froddle()<br>
expected = "baz"<br>
assert result == expected, "%s != %s" % (result, expected)<br>
</div>
</div>
<br>
If so, that's fantastic! The same thought crossed my mind to implement
that with ast transforms, but I don't have enough ast-fu to implement
it.<br>
<br>
<br clear="all">
=====<br>
--Ryan E. Freckleton<br>
</blockquote>
<br>
<br>
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