[Django]-How should I write tests for Forms in Django?

by

275👍

✅

I think if you just want to test the form, then you should just test the form and not the view where the form is rendered. Example to get an idea:

from django.test import TestCase
from myapp.forms import MyForm

class MyTests(TestCase):
    def test_forms(self):
        form_data = {'something': 'something'}
        form = MyForm(data=form_data)
        self.assertTrue(form.is_valid())
        ... # other tests relating forms, for example checking the form data
👤Torsten Engelbrecht

87👍

https://docs.djangoproject.com/en/stable/topics/testing/tools/#django.test.SimpleTestCase.assertFormError

from django.tests import TestCase

class MyTests(TestCase):
    def test_forms(self):
        response = self.client.post("/my/form/", {'something':'something'})
        self.assertFormError(response, 'form', 'something', 'This field is required.')

Where “form” is the context variable name for your form, “something” is the field name, and “This field is required.” is the exact text of the expected validation error.

👤Shane

19👍

The original 2011 answer was

self.assertContains(response, "Invalid message here", 1, 200)

But I see now (2018) there is a whole crowd of applicable asserts available:

  • assertRaisesMessage
  • assertFieldOutput
  • assertFormError
  • assertFormsetError

Take your pick.

👤John Mee

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