Extracting the appstruct logic into a separate function is one way to go, 
though it still would be useful to have a way to conveniently create 
peppercorn POST values from appstructs. Especially for cases where the view 
logic is quite simple boilerplate (validate the form, submit the resulting 
appstruct somewhere and do a redirect) separating every view function into 
2 could be avoided (e.g. register() and do_register(), with the latter 
being appstruct-only logic).

On Tuesday, December 23, 2014 6:57:22 AM UTC+1, Randall Leeds wrote:
>
> On Mon, Dec 22, 2014 at 1:59 PM, pyramidX <[email protected] 
> <javascript:>> wrote:
>
>> If my view uses this pattern for working with forms
>>
>> appstruct = deform_form.validate(request.POST.items())
>>
>> Then to unit test it I do something like this
>>
>> post = collections.OrderedDict([
>>     ('somefield', 'somevalue'),
>>     ('__start__', 'somedate:mapping'),
>>     ('year', '1111'),
>>     ('month', '11'),
>>     ('day', '11'),
>>     ('__end__', 'somedate:mapping'),
>> ]))
>> request = testing.DummyRequest(post=post)
>> response = views.someview(request)
>>
>> With more complex forms this test code gets messy and less readable with 
>> __start__, __end__, :sequence, :mapping all over the place.
>>
>> I've skimmed through the code for peppercorn/deform/pyramid and I can 
>> find ways to turn the POSTed values into an appstruct, but I can't find any 
>> way to turn an appstruct into these peppercorn POST values. The closest 
>> hints I could find is https://github.com/Pylons/deform/search?q=__start__ 
>> and https://github.com/Pylons/deform/search?q=start_mapping
>>
>> Is there a way to do something like
>>
>> post = some_function({
>>     'somefield': 'somevalue',
>>     'somedate': some_date
>> })
>> request = testing.DummyRequest(post=post)
>> response = views.someview(request)
>>
>> which would be equivalent to the first example? If not would it be a 
>> worthy feature request for deform or peppercorn?
>>
>
> You may simply want to extract any non-trivial logic out into functions 
> that take the appstruct. You can then test most of that logic without 
> touching deform. Or use the mock library to mock the schema so you can test 
> that the view does the right thing when `validate` returns a valid 
> appstruct or raises an exception.
>

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