Re: [Pyunit-interest] Recursive assert_equals.

[Mark G. <mar...@gm...>]

Actually, what you implemented is a comparison method, which you choose to
call assert_equal().

In the xUnit world assert (in every modification) is a method that
immediately throws exception when asserted condition fails. xUnits are Unit
Test tools (not that you are prevented from forcing it into something
different:) ).

Pure terminology, you'll say? You are right! But important one. Assert stop=
s
execution on the failure and unrolls return stack to the error processing
point. I think this should be kept in mind - in order not to distort this
vision created by our peers.No offense.

Sorry for late response - was busy grokking new job.

On 12/6/06, Desilets, Alain <Ala...@nr...> wrote:
>
> Actually, I went ahead and implemented a recursive assert_equal() method.
> It works pretty well. It basically deals with all the primitive types (in=
ts,
> floats, strings, etc), all collections (lists, tuples, dicts) and arbitra=
ry
> objects.
>
> When a difference is found, it provides helpful messages that help you
> drill down from the top to the bottom where the difference was found.
>
> Alain
>
>
> -----Original Message-----
> From: Mark Geyzer [mailto:mar...@gm...]
> Sent: Tuesday, December 05, 2006 1:54 AM
> To: Desilets, Alain
> Cc: pyu...@li...
> Subject: Re: [Pyunit-interest] Recursive assert_equals.
>
>
> You may try to convert your dictionaries to strings with "str" or "repr"
> function, and then call assert method on resulting strings. This will sav=
e
> you the hassle of implementing recursive assert, but then - in case of
> failure - you'll have top find the guilty field manually.
>
> If you are not happy with that approach - you'll have to write a method
> that parses your dictionaries and checks each value with an assert - yuck=
s!
>
> BTW, if you are not aware - failed assert INTERRUPTS the test, so that if
> you have more than field with different values - it will throw exception =
on
> the first one checked.
>
> PyUnit is about FrameWork for your tests, that's all; alas, it is not
> about checking complicated data structures.
>
>
> Hope, it helps
>
> On 11/29/06, Desilets, Alain <Ala...@nr...> wrote:
> Is there a way to do a recursive assert_equals on a complex data
> structure?
>
> For example, say I want to assert that two dictionary are "equal". The
> keys of the dictionary are strings, and the values are objects of type
> SomeClass, which, among other things, have an attrigute called
> some_attribute which is of type SomeOtherClass.
>
> I want to write:
>
> Self.assert_equal_recusrsive(expected_dict, got_dict)
>
> And have the system do the following:
>
> - Make sure that expected_dict and got_dict are both of the same type (a
> dictionary in this case)
> - Make sure that they have the same string keys
> - For each string key, make sure that the associated objects are of the
> same type (SomeClass), have the same attributes with same values.
> - In particular for the some_attribute attribute, it would make sure that
> the values are also of the same type (SomeOtherClass), and that they have
> the same attribute values pairs.
>
> Has this been written before? If not would it be doble (it seems to me it
> should be).
>
> I know that in jUnit (Java version), this kind of recursive comparison is
> supported to at least some extend. For example, if I compare two dictionn=
ary
> objects, the system will make sure that the keys are the same and the val=
ues
> too. But it doesn't go recursively into the attributes of objects AFAIK.
>
>
> ----
> Alain D=E9silets, MASc
> Agent de recherches/Research Officer
> Institut de technologie de l'information du CNRC /
> NRC Institute for Information Technology
>
> ala...@nr...
> T=E9l/Tel (613) 990-2813
> Facsimile/t=E9l=E9copieur: (613) 952-7151
>
> Conseil national de recherches Canada, M50, 1200 chemin Montr=E9al,
> Ottawa (Ontario) K1A 0R6
> National Research Council Canada, M50, 1200 Montreal Rd., Ottawa, ON
> K1A 0R6
>
> Gouvernement du Canada | Government of Canada
>
>
>
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net 's Techsay panel and you'll get the chance to share
> your
> opinions on IT & business topics through brief surveys - and earn cash
> http://www.techsay.com/default.php?page=3Djoin.php&p=3Dsourceforge&CID=3D=
DEVDEV
> _______________________________________________
> Pyunit-interest mailing list
> Pyu...@li...
> https://lists.sourceforge.net/lists/listinfo/pyunit-interest
>
>
>
>
> --
> Mark Geyzer
> Software Engineer,
> tel: 972-52-6782603
>



--=20
Mark Geyzer
Software Engineer,
tel: 972-52-6782603