Fixed #12991 -- Added unittest2 support. Thanks to PaulM for the draft patch, and to Luke, Karen, Justin, Alex, Łukasz Rekucki, and Chuck Harmston for their help testing and reviewing the final patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@14139 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/modeltests/lookup/models.py

@@ -4,7 +4,7 @@
 This demonstrates features of the database API.
 """
 
-from django.db import models, DEFAULT_DB_ALIAS
+from django.db import models, DEFAULT_DB_ALIAS, connection
 from django.conf import settings
 
 class Article(models.Model):
@@ -41,15 +41,16 @@ False
 # There should be some now!
 >>> Article.objects.exists()
 True
-"""}
 
-if settings.DATABASES[DEFAULT_DB_ALIAS]['ENGINE'] in (
-        'django.db.backends.postgresql',
-        'django.db.backends.postgresql_pysycopg2'):
-    __test__['API_TESTS'] += r"""
-# text matching tests for PostgreSQL 8.3
+# Integer value can be queried using string
 >>> Article.objects.filter(id__iexact='1')
 [<Article: Article 1>]
+
+"""}
+
+if connection.features.supports_date_lookup_using_string:
+    __test__['API_TESTS'] += r"""
+# A date lookup can be performed using a string search
 >>> Article.objects.filter(pub_date__startswith='2005')
 [<Article: Article 5>, <Article: Article 6>, <Article: Article 4>, <Article: Article 2>, <Article: Article 3>, <Article: Article 7>, <Article: Article 1>]
 """
@@ -409,7 +410,7 @@ FieldError: Join on field 'headline' not permitted. Did you misspell 'starts' fo
 """
 
 
-if settings.DATABASES[DEFAULT_DB_ALIAS]['ENGINE'] != 'django.db.backends.mysql':
+if connection.features.supports_regex_backreferencing:
     __test__['API_TESTS'] += r"""
 # grouping and backreferences
 >>> Article.objects.filter(headline__regex=r'b(.).*b\1')