Fixed #28500 -- Fixed crash in FileBasedCache._is_expired() if the cache file is empty.

1 files changed, 7 insertions, 0 deletions

diff --git a/tests/cache/tests.py b/tests/cache/tests.py
index eb5865f08d..cef000cb02 100644
--- a/tests/cache/tests.py
+++ b/tests/cache/tests.py
@@ -1366,6 +1366,13 @@ class FileBasedCacheTests(BaseCacheTests, TestCase):
             with self.assertRaises(IOError):
                 cache.get('foo')
 
+    def test_empty_cache_file_considered_expired(self):
+        cache_file = cache._key_to_file('foo')
+        with open(cache_file, 'wb') as fh:
+            fh.write(b'')
+        with open(cache_file, 'rb') as fh:
+            self.assertIs(cache._is_expired(fh), True)
+
 
 @override_settings(CACHES={
     'default': {