[1.2.X] Migrate get_latest doctests. Thanks to Alex Gaynor.

Backport of r13783 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@13800 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/modeltests/get_latest/models.py

@@ -28,52 +28,3 @@ class Person(models.Model):
 
     def __unicode__(self):
         return self.name
-
-__test__ = {'API_TESTS':"""
-# Because no Articles exist yet, latest() raises ArticleDoesNotExist.
->>> Article.objects.latest()
-Traceback (most recent call last):
-    ...
-DoesNotExist: Article matching query does not exist.
-
-# Create a couple of Articles.
->>> from datetime import datetime
->>> a1 = Article(headline='Article 1', pub_date=datetime(2005, 7, 26), expire_date=datetime(2005, 9, 1))
->>> a1.save()
->>> a2 = Article(headline='Article 2', pub_date=datetime(2005, 7, 27), expire_date=datetime(2005, 7, 28))
->>> a2.save()
->>> a3 = Article(headline='Article 3', pub_date=datetime(2005, 7, 27), expire_date=datetime(2005, 8, 27))
->>> a3.save()
->>> a4 = Article(headline='Article 4', pub_date=datetime(2005, 7, 28), expire_date=datetime(2005, 7, 30))
->>> a4.save()
-
-# Get the latest Article.
->>> Article.objects.latest()
-<Article: Article 4>
-
-# Get the latest Article that matches certain filters.
->>> Article.objects.filter(pub_date__lt=datetime(2005, 7, 27)).latest()
-<Article: Article 1>
-
-# Pass a custom field name to latest() to change the field that's used to
-# determine the latest object.
->>> Article.objects.latest('expire_date')
-<Article: Article 1>
-
->>> Article.objects.filter(pub_date__gt=datetime(2005, 7, 26)).latest('expire_date')
-<Article: Article 3>
-
-# You can still use latest() with a model that doesn't have "get_latest_by"
-# set -- just pass in the field name manually.
->>> p1 = Person(name='Ralph', birthday=datetime(1950, 1, 1))
->>> p1.save()
->>> p2 = Person(name='Stephanie', birthday=datetime(1960, 2, 3))
->>> p2.save()
->>> Person.objects.latest()
-Traceback (most recent call last):
-    ...
-AssertionError: latest() requires either a field_name parameter or 'get_latest_by' in the model
-
->>> Person.objects.latest('birthday')
-<Person: Stephanie>
-"""}

tests/modeltests/get_latest/tests.py

@@ -0,0 +1,53 @@
+from datetime import datetime
+
+from django.test import TestCase
+
+from models import Article, Person
+
+
+class LatestTests(TestCase):
+    def test_latest(self):
+        # Because no Articles exist yet, latest() raises ArticleDoesNotExist.
+        self.assertRaises(Article.DoesNotExist, Article.objects.latest)
+
+        a1 = Article.objects.create(
+            headline="Article 1", pub_date=datetime(2005, 7, 26),
+            expire_date=datetime(2005, 9, 1)
+        )
+        a2 = Article.objects.create(
+            headline="Article 2", pub_date=datetime(2005, 7, 27),
+            expire_date=datetime(2005, 7, 28)
+        )
+        a3 = Article.objects.create(
+            headline="Article 3", pub_date=datetime(2005, 7, 27),
+            expire_date=datetime(2005, 8, 27)
+        )
+        a4 = Article.objects.create(
+            headline="Article 4", pub_date=datetime(2005, 7, 28),
+            expire_date=datetime(2005, 7, 30)
+        )
+
+        # Get the latest Article.
+        self.assertEqual(Article.objects.latest(), a4)
+        # Get the latest Article that matches certain filters.
+        self.assertEqual(
+            Article.objects.filter(pub_date__lt=datetime(2005, 7, 27)).latest(),
+            a1
+        )
+
+        # Pass a custom field name to latest() to change the field that's used
+        # to determine the latest object.
+        self.assertEqual(Article.objects.latest('expire_date'), a1)
+        self.assertEqual(
+            Article.objects.filter(pub_date__gt=datetime(2005, 7, 26)).latest('expire_date'),
+            a3,
+        )
+
+    def test_latest_manual(self):
+        # You can still use latest() with a model that doesn't have
+        # "get_latest_by" set -- just pass in the field name manually.
+        p1 = Person.objects.create(name="Ralph", birthday=datetime(1950, 1, 1))
+        p2 = Person.objects.create(name="Stephanie", birthday=datetime(1960, 2, 3))
+        self.assertRaises(AssertionError, Person.objects.latest)
+
+        self.assertEqual(Person.objects.latest("birthday"), p2)