Django: Define a form differently when in testing mode

I have a customized captcha field. I want to remove that field from a form when displaying it during tests.

My initial thought was to have a TESTING variable in a separate settings file that will be supplied as an argument to the test runner command. Then, I could to something like:

class CaptchaForm(forms.Form):
    notify_email = forms.EmailField(required=False)
    if not settings.TESTING:
        recaptcha = CaptchaField()

I believe this should work.

There might be an even better approach. Any ideas?

Update

After playing around with the suggestions below, I added this to the test folder's __init__.py:

    from project.app.forms import CaptchaField
    CaptchaField.clean = lambda x, y: y

This worked---witho开发者_如何学编程ut creating a shared TESTING setting. Does this look acceptable? Is there a reason that I should not do this?

You can disable captcha in constructor of unit-testing class. Like this:

class MyTest(unittest.TestCase):
    def __init__(self, *args, **kwargs):
         super(MyTest, self).__init__(*args, **kwargs)
         settings.TESTING = True

Or you can disable captcha field validation in this constructor, for example.

I assume CaptchaField is your own class. Then you could change the validation method:

from django.core.exceptions import ValidationError

class CaptchaField(Field):
    # ...

    def validate(self, value, model_instance):
        if settings.TESTING:
            return
        else:
            # Do CAPTCHA checking, leading to either
            # raise ValidationError  or
            # return

As werehuman already mentioned, you don't really need a separate settings file but can change the setting inside the unit test class.