[soc2009/multidb] Implemented a connections object that is responsible for tracking multiple database connections and lazily instantiating them. Also implemneted the DATABASES setting which replaces the various DATABASE_* settings

git-svn-id: http://code.djangoproject.com/svn/django/branches/soc2009/multidb@10892 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/multiple_database/tests.py

@@ -0,0 +1,17 @@
+from django.conf import settings
+from django.db import connections
+from django.test import TestCase
+
+class DatabaseSettingTestCase(TestCase):
+    def setUp(self):
+        settings.DATABASES['__test_db'] = {
+            'DATABASE_ENGINE': 'sqlite3',
+            'DATABASE_NAME': ':memory:',
+        }
+
+    def tearDown(self):
+        del settings.DATABASES['__test_db']
+
+    def test_db_connection(self):
+        connections['default'].cursor()
+        connections['__test_db'].cursor()