django - Django 2.1 SimpleTestCase，DateField 的 assertFieldOutput - AssertionError：ValidationError 未引发

Question

我有这个简单的表单（Django 2.1，Python 3.6.5）。

class RenewBookForm(forms.Form):
    renewal_date = forms.DateField(
                   help_text="Enter a date between now and 4 weeks (default 3)."
                 )

    def clean_renewal_date(self):
        data = self.cleaned_data['renewal_date']

        # Check if a date is not in the past.
        if data < datetime.date.today():
            raise ValidationError(_('Invalid date - renewal in past'))

        # Check if a date is in the allowed range (+4 weeks from today).
        if data > datetime.date.today() + datetime.timedelta(weeks=4):
            raise ValidationError(_(
                              'Invalid date - renewal more than 4 weeks ahead'))

        # Remember to always return the cleaned data.
        return data

我有基于 SimpleTestCase 类的测试：

import datetime
from django.forms import DateField

from django.test import SimpleTestCase
from django.utils import timezone

from catalog.forms import RenewBookForm

class RenewBookFormTest(SimpleTestCase):

    def test_renew_form_date_is_not_in_the_past(self):
        error_invalid = ['Invalid date - renewal in past']
        past_date = datetime.date.today() - datetime.timedelta(days=1)
        valid_date = datetime.date.today() + datetime.timedelta(days=21)
        valid = { valid_date: valid_date }
        invalid = { past_date: error_invalid }
        self.assertFieldOutput(DateField, valid, invalid)

错误，运行此测试后：

Traceback (most recent call last):
  File "locallibrary/catalog/tests/test_forms.py", line 53, in test_renew_form_date_is_not_in_the_past
    self.assertFieldOutput(DateField, valid, invalid)
  File "~/.pyenv/versions/3.6.5/lib/python3.6/site-packages/django/test/testcases.py", line 660, in assertFieldOutput
    required.clean(input)
AssertionError: ValidationError not raised

这个测试有什么问题？谢谢你。

标签： djangovalidationdatefielddjango-unittest

Answer 1

我发现它self.assertFieldOutput(DateField, valid, invalid)用于测试从 Django 类派生的字段类。所以它不适用于你的情况。

测试应该如下，假设'/form/是您的表单的 url，并且'form'是您视图中的上下文键。

class RenewBookFormTest(SimpleTestCase):

    def test_renew_form_date_is_not_in_the_past(self):
        error_invalid = ['Invalid date - renewal in past']
        past_date = datetime.date.today() - datetime.timedelta(days=1)
        valid_date = datetime.date.today() + datetime.timedelta(days=21)
        response = self.client.post('/form/', data={'renewal_date': past_date})
        context_form = 'form'
        self.assertFormError(response, context_form, 'renewal_date',
                error_invalid)