Fixed #30425 -- Handled jinja2.TemplateSyntaxError when rendering a template.

Jinja raises jinja2.TemplateSyntaxError in render() not in
get_template() when it's in an included template.

2 files changed, 38 insertions, 1 deletions

diff --git a/tests/template_backends/jinja2/template_backends/syntax_error_include.html b/tests/template_backends/jinja2/template_backends/syntax_error_include.html
new file mode 100644
index 0000000000..e23b0e78d3
--- /dev/null
+++ b/tests/template_backends/jinja2/template_backends/syntax_error_include.html
@@ -0,0 +1 @@
+{% include "template_backends/syntax_error.html" %}
diff --git a/tests/template_backends/test_jinja2.py b/tests/template_backends/test_jinja2.py
index a454e93a39..b908431914 100644
--- a/tests/template_backends/test_jinja2.py
+++ b/tests/template_backends/test_jinja2.py
@@ -1,5 +1,5 @@
 from pathlib import Path
-from unittest import skipIf
+from unittest import mock, skipIf
 
 from django.template import TemplateSyntaxError
 from django.test import RequestFactory
@@ -96,3 +96,39 @@ class Jinja2Tests(TemplateStringsTests):
         })
         template = engine.get_template('hello.html')
         self.assertEqual(template.render({'name': 'Joe'}), 'Hello Joe!')
+
+    def test_template_render_nested_error(self):
+        template = self.engine.get_template('template_backends/syntax_error_include.html')
+        with self.assertRaises(TemplateSyntaxError) as e:
+            template.render(context={})
+        debug = e.exception.template_debug
+        self.assertEqual(debug['after'], '')
+        self.assertEqual(debug['before'], '')
+        self.assertEqual(debug['during'], '{% block %}')
+        self.assertEqual(debug['bottom'], 1)
+        self.assertEqual(debug['top'], 0)
+        self.assertEqual(debug['line'], 1)
+        self.assertEqual(debug['total'], 1)
+        self.assertEqual(len(debug['source_lines']), 1)
+        self.assertTrue(debug['name'].endswith('syntax_error.html'))
+        self.assertIn('message', debug)
+
+    def test_template_render_error_nonexistent_source(self):
+        template = self.engine.get_template('template_backends/hello.html')
+        with mock.patch(
+            'jinja2.environment.Template.render',
+            side_effect=jinja2.TemplateSyntaxError('', 1, filename='nonexistent.html'),
+        ):
+            with self.assertRaises(TemplateSyntaxError) as e:
+                template.render(context={})
+        debug = e.exception.template_debug
+        self.assertEqual(debug['after'], '')
+        self.assertEqual(debug['before'], '')
+        self.assertEqual(debug['during'], '')
+        self.assertEqual(debug['bottom'], 0)
+        self.assertEqual(debug['top'], 0)
+        self.assertEqual(debug['line'], 1)
+        self.assertEqual(debug['total'], 0)
+        self.assertEqual(len(debug['source_lines']), 0)
+        self.assertTrue(debug['name'].endswith('nonexistent.html'))
+        self.assertIn('message', debug)