CODEWITHSUNDEEP
pythondjangounit-testing
amuttsch
amuttsch

Reputation: 1244

Test django forms raised ValidationError

I'm struggeling to test my forms that raise a validation error.

My test looks like the following:

    def test_register_password_strength(self):
        form_params = {'first_name': 'John',
                       'last_name': 'Doe',
                       'email': '[email protected]',
                       'password': 'a',
                       'password_confirm': 'a',
                       'g-recaptcha-response': 'PASSED'}
        form = RegisterForm(form_params)
        self.assertFalse(form.is_valid())

        try:
            form.clean_password()
            self.fail('Validation Error should be raised')
        except ValidationError as e:
            self.assertEquals('pw_too_short', e.code)

And the form raises the ValidationError in the following way:

    password = forms.CharField(label='Password', widget=forms.PasswordInput)
    widgets = {
        'password': forms.PasswordInput(),
    }

    def clean_password(self):
        password = self.cleaned_data.get('password')

        if len(password) < 7:
            raise ValidationError('Password must be at least 7 characters long.', code='pw_too_short')

        return self.cleaned_data.get('password')

self.assertFalse(form.is_valid()) asserts correctly to false, but when I try to call form.clean_password(), I get the following error: TypeError: object of type 'NoneType' has no len().

self.cleaned_data has no element named password after form.is_valid() was called.

Is there another way of testing the ValidationErrors other than calling is_valid()?

Upvotes: 8

Views: 3948

Answers (1)

Charlesthk
Charlesthk

Reputation: 9684

Instead of using :

    try:
        form.clean_password()
        self.fail('Validation Error should be raised')
    except ValidationError as e:
        self.assertEquals('pw_too_short', e.code)

Consider using Form.has_error('password', code='pw_too_short')

More info here : https://docs.djangoproject.com/en/1.8/ref/forms/api/#django.forms.Form.has_error

Upvotes: 11

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