Fixed #8136: Added a signal emission when an error is raised handling an error. This was required for the test client to handle missing 404.html templates and errors in the 404.html template. Thanks to danfairs for the report and fix.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8464 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/handlers/base.py

@@ -112,7 +112,10 @@ class BaseHandler(object):
                     callback, param_dict = resolver.resolve404()
                     return callback(request, **param_dict)
                 except:
-                    return self.handle_uncaught_exception(request, resolver, sys.exc_info())
+                    try:
+                        return self.handle_uncaught_exception(request, resolver, sys.exc_info())
+                    finally:
+                        receivers = signals.got_request_exception.send(sender=self.__class__, request=request)
         except exceptions.PermissionDenied:
             return http.HttpResponseForbidden('<h1>Permission denied</h1>')
         except SystemExit:

tests/regressiontests/test_client_regress/bad_templates/404.html

@@ -0,0 +1,3 @@
+{% block foo %}
+
+This template is deliberately bad - we want it to raise an exception when it is used.

tests/regressiontests/test_client_regress/models.py

@@ -1,10 +1,13 @@
 """
 Regression tests for the Test Client, especially the customized assertions.
 """
+import os
+from django.conf import settings
 
 from django.test import Client, TestCase
 from django.core.urlresolvers import reverse
 from django.core.exceptions import SuspiciousOperation
+from django.template import TemplateDoesNotExist, TemplateSyntaxError
 
 class AssertContainsTests(TestCase):
     def test_contains(self):
@@ -307,6 +310,31 @@ class ExceptionTests(TestCase):
         except SuspiciousOperation:
             self.fail("Staff should be able to visit this page")
     
+class TemplateExceptionTests(TestCase):
+    def setUp(self):
+        self.old_templates = settings.TEMPLATE_DIRS
+        settings.TEMPLATE_DIRS = ()
+        
+    def tearDown(self):
+        settings.TEMPLATE_DIRS = self.old_templates
+        
+    def test_no_404_template(self):
+        "Missing templates are correctly reported by test client"    
+        try:
+            response = self.client.get("/no_such_view/")
+            self.fail("Should get error about missing template")
+        except TemplateDoesNotExist:
+            pass
+
+    def test_bad_404_template(self):
+        "Errors found when rendering 404 error templates are re-raised"
+        settings.TEMPLATE_DIRS = (os.path.join(os.path.dirname(__file__), 'bad_templates'),)
+        try:
+            response = self.client.get("/no_such_view/")
+            self.fail("Should get error about syntax error in template")
+        except TemplateSyntaxError:
+            pass
+        
 # We need two different tests to check URLconf substitution -  one to check
 # it was changed, and another one (without self.urls) to check it was reverted on
 # teardown. This pair of tests relies upon the alphabetical ordering of test execution.