Refs #25422 -- Added a test for a template tag with type annotations.

This doesn't work in Django 1.8 but was fixed in Django 1.9 as a
side effect of another change.

2 files changed, 15 insertions, 0 deletions

diff --git a/tests/template_tests/annotated_tag_function.py b/tests/template_tests/annotated_tag_function.py
new file mode 100644
index 0000000000..bd3017c27c
--- /dev/null
+++ b/tests/template_tests/annotated_tag_function.py
@@ -0,0 +1,8 @@
+from django import template
+
+register = template.Library()
+
+
+@register.simple_tag()
+def annotated_tag_function(val: int):
+    return val
diff --git a/tests/template_tests/test_custom.py b/tests/template_tests/test_custom.py
index 1b63953860..48252e1788 100644
--- a/tests/template_tests/test_custom.py
+++ b/tests/template_tests/test_custom.py
@@ -1,6 +1,7 @@
 from __future__ import unicode_literals
 
 import os
+from unittest import skipUnless
 
 from django.template import Context, Engine, TemplateSyntaxError
 from django.template.base import Node
@@ -380,3 +381,9 @@ class TemplateTagLoadingTests(SimpleTestCase):
                 'working_egg': 'tagsegg.templatetags.working_egg',
             })
             engine.from_string(ttext)
+
+    @skipUnless(six.PY3, "Python 3 only -- Python 2 doesn't have annotations.")
+    def test_load_annotated_function(self):
+        Engine(libraries={
+            'annotated_tag_function': 'template_tests.annotated_tag_function',
+        })