[1.9.x] Fixed #26603 -- Forced lazy template names to text when computing cache key.

Refs #26536.

Thanks Sylvain Fankhauser for the very detailed report.

Backport of 207c5b4acd410dd39bac31457dae26a0d15b8b93 from master

1 files changed, 8 insertions, 0 deletions

diff --git a/tests/template_tests/test_loaders.py b/tests/template_tests/test_loaders.py
index feafeb2b06..8cb366e038 100644
--- a/tests/template_tests/test_loaders.py
+++ b/tests/template_tests/test_loaders.py
@@ -13,6 +13,7 @@ from django.template.engine import Engine
 from django.test import SimpleTestCase, ignore_warnings, override_settings
 from django.utils import six
 from django.utils.deprecation import RemovedInDjango20Warning
+from django.utils.functional import lazystr
 
 from .utils import TEMPLATE_DIR
 
@@ -153,6 +154,13 @@ class CachedLoaderTests(SimpleTestCase):
         """
         self.assertEqual(self.engine.template_loaders[0].cache_key('-template.html', []), '-template.html')
 
+    def test_template_name_lazy_string(self):
+        """
+        #26603 -- A template name specified as a lazy string should be forced
+        to text before computing its cache key.
+        """
+        self.assertEqual(self.engine.template_loaders[0].cache_key(lazystr('template.html'), []), 'template.html')
+
 
 @unittest.skipUnless(pkg_resources, 'setuptools is not installed')
 class EggLoaderTests(SimpleTestCase):