Re: Check that all properties match?

Of course Charlie, it wasn't my intention to complain about how NUnit works
right now, absolutely. I agree with your observations about the limited
availability of an API based on extension methods to pre-3.5 users as well
as on the priority of trying to figure out a better object model to reduce
duplication.
I doubt I will be able to discover anything particularly new because of the
little time I can spend on it and mostly due to how little is my experience
compared to yours, but as you see whenever somethings pops into my mind I
propose it on the mailing list. I'll wait for things to settle down a bit
then, since I still can't get where you are going with the constraint model
right now.

On Wed, Aug 27, 2008 at 10:35 PM, Charlie Poole <[email protected]
> wrote:

>  Hi Simone,
>
>
> There's nothing to prevent integrating new ideas into NUnit via extension methods, but as a
> mainstream approach - i.e. for use in release versions of NUnit - it
> doesn't work well since
> any new features are unavailable for users of pre-.NET 3.5 versions -
> which is probably
> the majority of users!
>
>  Use of extension methods would make it possible to extend NUnit syntax
> without modifying
> NUnit, but it would not mitigate the problem of having to make changes in
> multiple places.
> You would have to supply different extensions for each of the places you
> now edit. Of
> course, that would be an improvement, but a more significant improvement
> would be to
> figure out a better object model that reduces duplication.
>
> My hope is that someone like you, working on a new constraint, will see a
> way to improve
> the internal structure. Of course, you have to grok it first. :-)
>
> Another improvement, I must admit, would be for me to document how a new
> constraint
> gets integrated into NUnit. I plan to do that as soon as things stabilize a
> bit.
>
> Charlie
>
>  ------------------------------
> *From:* [email protected] [mailto:
> [email protected]] *On Behalf Of *Simone Busoli
> *Sent:* Wednesday, August 27, 2008 1:00 PM
> *To:* Charlie Poole
>
> *Cc:* [email protected]
> *Subject:* Re: [Nunit-users] Check that all properties match?
>
>  It should be trivial to write a simple implementation of such a
> constraint. What I'm concerned with is the difficulty of integrating it into
> NUnit. As with the Ordered and Serializable constraints, the hard work for
> me has been to go everywhere the constraint is going to be needed and
> implement all the - mostly syntactic - modifications to the code. That's why
> some time ago I proposed a different route, hoping that it could lower the
> barrier to implement new constraints. I would love to be able to integrate
> new constraints into NUnit via extension methods.
>
> On Wed, Aug 27, 2008 at 5:24 PM, Charlie Poole <
> [email protected]> wrote:
>
>>  With the current syntax, you could do this by writing a comparer that
>> used refection and asserting
>>     Assert.That(x, Is.EqualTo(dummy).Comparer(mycomparer));
>>
>> But it would make sense to have it be part of NUnit....
>>     Assert.That(x, Is.EqualTo(dummy).AllProperties);
>> Or...
>>     Assert.That(x, Has.AllPropertiesEqualTo(dummy));
>>
>> If you search the feature requests, I think you may find that someone has
>> asked for this before.
>>
>> Right now, the syntactic infrastructure is undergoing a bit of flux, but
>> we could add the constraint
>> easily enough if someone writes it and deal with the parsing aspect later.
>>
>> Charlie
>>
>>  ------------------------------
>> *From:* [email protected] [mailto:
>> [email protected]] *On Behalf Of *Simone Busoli
>> *Sent:* Wednesday, August 27, 2008 7:38 AM
>> *To:* Laimonas Simutis
>> *Cc:* [email protected]
>> *Subject:* Re: [Nunit-users] Check that all properties match?
>>
>>   Yes. RhinoMocks has an AllPropertiesMatchContraint class which is used
>> for the same purpose. Often in tests I need to assert that what I get from a
>> method call is equal to a dummy object I passed as input, and I don't want
>> to override the Equals method since I need that only during tests.
>>
>> On Wed, Aug 27, 2008 at 4:22 PM, Laimonas Simutis <[email protected]>wrote:
>>
>>> Would this be used to compare object equivalency or verifying some
>>> sort of cloning?
>>>
>>> On Wed, Aug 27, 2008 at 3:32 AM, Simone Busoli <[email protected]>
>>> wrote:
>>> > Hello, would it be useful to have a way to check that all properties
>>> with
>>> > matching names are equal on two objects?
>>> >
>>> >
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