[1.2.X] Migrated m2m_multiple doctests. Thanks to Alex Gaynor.

Backport of r13789 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@13805 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/modeltests/m2m_multiple/tests.py

@@ -0,0 +1,84 @@
+from datetime import datetime
+
+from django.test import TestCase
+
+from models import Article, Category
+
+
+class M2MMultipleTests(TestCase):
+    def test_multiple(self):
+        c1, c2, c3, c4 = [
+            Category.objects.create(name=name)
+            for name in ["Sports", "News", "Crime", "Life"]
+        ]
+
+        a1 = Article.objects.create(
+            headline="Area man steals", pub_date=datetime(2005, 11, 27)
+        )
+        a1.primary_categories.add(c2, c3)
+        a1.secondary_categories.add(c4)
+
+        a2 = Article.objects.create(
+            headline="Area man runs", pub_date=datetime(2005, 11, 28)
+        )
+        a2.primary_categories.add(c1, c2)
+        a2.secondary_categories.add(c4)
+
+        self.assertQuerysetEqual(
+            a1.primary_categories.all(), [
+                "Crime",
+                "News",
+            ],
+            lambda c: c.name
+        )
+        self.assertQuerysetEqual(
+            a2.primary_categories.all(), [
+                "News",
+                "Sports",
+            ],
+            lambda c: c.name
+        )
+        self.assertQuerysetEqual(
+            a1.secondary_categories.all(), [
+                "Life",
+            ],
+            lambda c: c.name
+        )
+        self.assertQuerysetEqual(
+            c1.primary_article_set.all(), [
+                "Area man runs",
+            ],
+            lambda a: a.headline
+        )
+        self.assertQuerysetEqual(
+            c1.secondary_article_set.all(), []
+        )
+        self.assertQuerysetEqual(
+            c2.primary_article_set.all(), [
+                "Area man steals",
+                "Area man runs",
+            ],
+            lambda a: a.headline
+        )
+        self.assertQuerysetEqual(
+            c2.secondary_article_set.all(), []
+        )
+        self.assertQuerysetEqual(
+            c3.primary_article_set.all(), [
+                "Area man steals",
+            ],
+            lambda a: a.headline
+        )
+        self.assertQuerysetEqual(
+            c3.secondary_article_set.all(), []
+        )
+        self.assertQuerysetEqual(
+            c4.primary_article_set.all(), []
+        )
+        self.assertQuerysetEqual(
+            c4.secondary_article_set.all(), [
+                "Area man steals",
+                "Area man runs",
+            ],
+            lambda a: a.headline
+        )