ADD: dav_base: some simple test cases.

dav_base/tests/test_emails.py

@@ -0,0 +1,20 @@
+from django.core.exceptions import ImproperlyConfigured
+from django.test import TestCase
+
+from ..emails import AbstractMail
+
+
+class EmailsTestCase(TestCase):
+    def setUp(self):
+        self.email = AbstractMail()
+
+    def test_send(self):
+        try:
+            self.email.send()
+            self.assertTrue(False, 'AbstractEmail.send() does not raise an Exception')
+        except NotImplementedError:
+            pass
+        except ImproperlyConfigured:
+            pass
+        except Exception:
+            self.assertTrue(False, 'AbstractEmail.send() raised unexpected Exception')