[5.2.x] Fixed #36712 -- Evaluated type annotations lazily in template tag registration.

Ideally, this will be reverted when an upstream solution is available for
https://github.com/python/cpython/issues/141560.

Thanks Patrick Rauscher for the report and Augusto Pontes for the
first iteration and test.

Backport of 34186e731ca20a2344b1f88fd543a854d6b13a00 from main.

1 files changed, 26 insertions, 0 deletions

diff --git a/tests/template_tests/test_library.py b/tests/template_tests/test_library.py
index 5827d33223..609b919923 100644
--- a/tests/template_tests/test_library.py
+++ b/tests/template_tests/test_library.py
@@ -1,8 +1,10 @@
 import functools
+import unittest
 
 from django.template import Library
 from django.template.base import Node
 from django.test import SimpleTestCase
+from django.utils.version import PY314
 
 
 class FilterRegistrationTests(SimpleTestCase):
@@ -78,6 +80,14 @@ class InclusionTagRegistrationTests(SimpleTestCase):
         self.assertIs(func_wrapped, func)
         self.assertTrue(hasattr(func_wrapped, "cache_info"))
 
+    @unittest.skipUnless(PY314, "Deferred annotations are Python 3.14+ only")
+    def test_inclusion_tag_deferred_annotation(self):
+        @self.library.inclusion_tag("template.html")
+        def func(arg: SomeType):  # NOQA: F821
+            return ""
+
+        self.assertIn("func", self.library.tags)
+
 
 class SimpleTagRegistrationTests(SimpleTestCase):
     def setUp(self):
@@ -104,6 +114,14 @@ class SimpleTagRegistrationTests(SimpleTestCase):
 
         self.assertIn("name", self.library.tags)
 
+    @unittest.skipUnless(PY314, "Deferred annotations are Python 3.14+ only")
+    def test_tag_deferred_annotation(self):
+        @self.library.simple_tag
+        def func(parser, token: SomeType):  # NOQA: F821
+            return Node()
+
+        self.assertIn("func", self.library.tags)
+
     def test_simple_tag_invalid(self):
         msg = "Invalid arguments provided to simple_tag"
         with self.assertRaisesMessage(ValueError, msg):
@@ -145,6 +163,14 @@ class SimpleBlockTagRegistrationTests(SimpleTestCase):
 
         self.assertIn("name", self.library.tags)
 
+    @unittest.skipUnless(PY314, "Deferred annotations are Python 3.14+ only")
+    def test_simple_block_tag_deferred_annotation(self):
+        @self.library.simple_block_tag
+        def func(content: SomeType):  # NOQA: F821
+            return content
+
+        self.assertIn("func", self.library.tags)
+
     def test_simple_block_tag_invalid(self):
         msg = "Invalid arguments provided to simple_block_tag"
         with self.assertRaisesMessage(ValueError, msg):