How to test whether a formset instance is properly initialized

[PARTH PATIL]

I'm currently working on ticket #10403 -- Declarative syntax for Formsets

How to test whether a formset instance is correctly initialized??

The thing which I'm trying to achieve is to initiate a formset without using formset_factory(). I'm able to create objects of class derived from the BaseFormSet, but its really difficult for me to check whether it is properly initiated or not as expected from a formset instance.

Should I write tests for this??

And if yes, which all parameter values should I assert in the test to conclude that my formset instance is indistinguishable from the one created using formset_factory.

Also is there any better way to test this? I'm currently using a python shell to create objects and then check manually its attributes, etc. which I know is not a good way. 

[Carlton Gibson]

Hey Parth, 

>  I'm currently using a python shell to create objects and then check manually its attributes, etc.

More or less, do the same thing, but in a test case. 🙂

# Declare class

# Create instance

# self.assertEqual()/assertIs()/etc expected attributes. 

# … same but for behaviour too. (Give it some data, is_valid(), etc)

Look in tests/forms_tests/tests/test_formsets/py::FormsFormsetTestCase. 

There are cases there using formset_factory(). Your versions will just declare the FormSet instead. 

Hope that helps.

If you have difficulties, open a PR with what you’ve got: it may be easier to help you there. 

Kind Regards,

Carlton

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