Added tests for logging of Http404 warnings.

tests/logging_tests/views.py

@@ -1,6 +1,11 @@
 from __future__ import unicode_literals
 
 from django.core.exceptions import DisallowedHost, SuspiciousOperation
+from django.http import HttpResponse
+
+
+def innocent(request):
+    return HttpResponse('innocent')
 
 
 def suspicious(request):