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from django.core.exceptions import FieldError
from django.test import TestCase
from .models import Article, Author
class CustomColumnsTests(TestCase):
@classmethod
def setUpTestData(cls):
cls.a1 = Author.objects.create(first_name="John", last_name="Smith")
cls.a2 = Author.objects.create(first_name="Peter", last_name="Jones")
cls.authors = [cls.a1, cls.a2]
cls.article = Article.objects.create(
headline="Django lets you build web apps easily", primary_author=cls.a1
)
cls.article.authors.set(cls.authors)
def test_query_all_available_authors(self):
self.assertSequenceEqual(Author.objects.all(), [self.a2, self.a1])
def test_get_first_name(self):
self.assertEqual(
Author.objects.get(first_name__exact="John"),
self.a1,
)
def test_filter_first_name(self):
self.assertSequenceEqual(
Author.objects.filter(first_name__exact="John"),
[self.a1],
)
def test_field_error(self):
msg = (
"Cannot resolve keyword 'firstname' into field. Choices are: "
"Author_ID, article, first_name, last_name, primary_set"
)
with self.assertRaisesMessage(FieldError, msg):
Author.objects.filter(firstname__exact="John")
def test_attribute_error(self):
with self.assertRaises(AttributeError):
self.a1.firstname
with self.assertRaises(AttributeError):
self.a1.last
def test_get_all_authors_for_an_article(self):
self.assertSequenceEqual(self.article.authors.all(), [self.a2, self.a1])
def test_get_all_articles_for_an_author(self):
self.assertQuerySetEqual(
self.a1.article_set.all(),
[
"Django lets you build web apps easily",
],
lambda a: a.headline,
)
def test_get_author_m2m_relation(self):
self.assertSequenceEqual(
self.article.authors.filter(last_name="Jones"), [self.a2]
)
def test_author_querying(self):
self.assertSequenceEqual(
Author.objects.order_by("last_name"),
[self.a2, self.a1],
)
def test_author_filtering(self):
self.assertSequenceEqual(
Author.objects.filter(first_name__exact="John"),
[self.a1],
)
def test_author_get(self):
self.assertEqual(self.a1, Author.objects.get(first_name__exact="John"))
def test_filter_on_nonexistent_field(self):
msg = (
"Cannot resolve keyword 'firstname' into field. Choices are: "
"Author_ID, article, first_name, last_name, primary_set"
)
with self.assertRaisesMessage(FieldError, msg):
Author.objects.filter(firstname__exact="John")
def test_author_get_attributes(self):
a = Author.objects.get(last_name__exact="Smith")
self.assertEqual("John", a.first_name)
self.assertEqual("Smith", a.last_name)
with self.assertRaisesMessage(
AttributeError, "'Author' object has no attribute 'firstname'"
):
getattr(a, "firstname")
with self.assertRaisesMessage(
AttributeError, "'Author' object has no attribute 'last'"
):
getattr(a, "last")
def test_m2m_table(self):
self.assertSequenceEqual(
self.article.authors.order_by("last_name"),
[self.a2, self.a1],
)
self.assertSequenceEqual(self.a1.article_set.all(), [self.article])
self.assertSequenceEqual(
self.article.authors.filter(last_name="Jones"),
[self.a2],
)
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