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from django import forms
from django.test import SimpleTestCase
from django.utils.deprecation import RemovedInDjango21Warning
class RenderDeprecationTests(SimpleTestCase):
def test_custom_widget_renderer_warning(self):
class CustomWidget1(forms.TextInput):
def render(self, name, value, attrs=None, renderer=None):
return super().render(name, value, attrs, renderer)
class CustomWidget2(forms.TextInput):
def render(self, *args, **kwargs):
return super().render(*args, **kwargs)
class CustomWidget3(forms.TextInput):
def render(self, name, value, attrs=None):
return super().render(name, value, attrs)
class MyForm(forms.Form):
foo = forms.CharField(widget=CustomWidget1)
bar = forms.CharField(widget=CustomWidget2)
baz = forms.CharField(widget=CustomWidget3)
form = MyForm()
str(form['foo']) # No warning.
str(form['bar']) # No warning.
msg = (
"Add the `renderer` argument to the render() method of <class "
"'forms_tests.widget_tests.test_render_deprecation"
".RenderDeprecationTests.test_custom_widget_renderer_warning.<locals>"
".CustomWidget3'>. It will be mandatory in Django 2.1."
)
with self.assertRaisesMessage(RemovedInDjango21Warning, msg):
str(form['baz'])
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