Fixed #29244 -- Prevented Paginator.count() from silencing TypeError and AttributeError.

tests/pagination/tests.py

@@ -1,4 +1,3 @@
-import unittest
 import warnings
 from datetime import datetime
 
@@ -6,13 +5,13 @@ from django.core.paginator import (
     EmptyPage, InvalidPage, PageNotAnInteger, Paginator,
     UnorderedObjectListWarning,
 )
-from django.test import TestCase
+from django.test import SimpleTestCase, TestCase
 
 from .custom import ValidAdjacentNumsPaginator
 from .models import Article
 
 
-class PaginationTests(unittest.TestCase):
+class PaginationTests(SimpleTestCase):
     """
     Tests for the Paginator and Page classes.
     """
@@ -151,6 +150,22 @@ class PaginationTests(unittest.TestCase):
         self.assertEqual(5, paginator.num_pages)
         self.assertEqual([1, 2, 3, 4, 5], list(paginator.page_range))
 
+    def test_count_does_not_silence_attribute_error(self):
+        class AttributeErrorContainer:
+            def count(self):
+                raise AttributeError('abc')
+
+        with self.assertRaisesMessage(AttributeError, 'abc'):
+            Paginator(AttributeErrorContainer(), 10).count()
+
+    def test_count_does_not_silence_type_error(self):
+        class TypeErrorContainer:
+            def count(self):
+                raise TypeError('abc')
+
+        with self.assertRaisesMessage(TypeError, 'abc'):
+            Paginator(TypeErrorContainer(), 10).count()
+
     def check_indexes(self, params, page_num, indexes):
         """
         Helper method that instantiates a Paginator object from the passed