TITLE_LENGTH_ERROR = "This title is too long, please make it 200 characters or less."
TITLE_EMPTY_ERROR = "You’ll have to add a title."
TEXT_EMPTY_ERROR = "Please enter some text."
NO_CATEGORY_ERROR = "Please select a category."
NO_CITY_ERROR = "Please select a city."


class ArticleForm(ModelForm):
    text = forms.CharField(widget=TinyMCE(attrs={'cols': 80, 'rows': 30}))
    class Meta:
        model = Article
        fields = ['title', 'text', 'categories', 'city']
        widgets = {'title': forms.TextInput(attrs={
            'placeholder': 'Enter a descriptive title'}),
            'categories': forms.CheckboxSelectMultiple(choices=Category.CATEGORY_CHOICES),
            'city': forms.RadioSelect(choices=City.CITY_CHOICES),
        }
        error_messages = {
            'title': {
                'max_length': TITLE_LENGTH_ERROR,
                'required': TITLE_EMPTY_ERROR,
            },
            'text': {
                'required': TEXT_EMPTY_ERROR,
            },
            'categories': {
                'required': NO_CATEGORY_ERROR,
            },
            'city': {
                'required': NO_CITY_ERROR,
            }
        }

from articles.models import Article, Category, City
from articles.forms import (
    ArticleForm,
    TITLE_LENGTH_ERROR,
    TITLE_EMPTY_ERROR,
    TEXT_EMPTY_ERROR,
    NO_CATEGORY_ERROR,
    NO_CITY_ERROR,
)


class ArticleFormTest(TestCase):

    def setUp(self):
        self.user = User.objects.create(username='testuser')
        self.user.set_password('12345')
        self.user.save()
        self.client.login(username='testuser', password='12345')

    def test_form_validation_for_blank_inputs(self):
        form = ArticleForm(data={'title': '', 'text': '', 'categories': '', 'city': '', 'author': self.user})
        self.assertFalse(form.is_valid())

        self.assertEqual(
            form.errors['text'],
            [TEXT_EMPTY_ERROR]
        )

(venv) Robins-MacBook-Pro:togethere robin$ python manage.py test articles/
Creating test database for alias 'default'...
.F....................
======================================================================
FAIL: test_form_validation_for_blank_inputs (articles.tests.test_forms.ArticleFormTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/robin/work/2016-06-04_togethere/togethere/articles/tests/test_forms.py", line 36, in test_form_validation_for_blank_inputs
    [TEXT_EMPTY_ERROR]
AssertionError: ['This field is required.'] != ['Please enter some text.']

----------------------------------------------------------------------
Ran 22 tests in 4.171s

FAILED (failures=1)
Destroying test database for alias 'default'...