Fixed #33701 -- Added fine-grained error locations to the technical 500 debug page.

1 files changed, 73 insertions, 0 deletions

diff --git a/tests/view_tests/tests/test_debug.py b/tests/view_tests/tests/test_debug.py
index a9b7625617..020ac7193e 100644
--- a/tests/view_tests/tests/test_debug.py
+++ b/tests/view_tests/tests/test_debug.py
@@ -766,6 +766,79 @@ class ExceptionReporterTests(SimpleTestCase):
         self.assertIn(implicit_exc.format("<p>Second exception</p>"), text)
         self.assertEqual(3, text.count("<p>Final exception</p>"))
 
+    @skipIf(
+        sys._xoptions.get("no_debug_ranges", False)
+        or os.environ.get("PYTHONNODEBUGRANGES", False),
+        "Fine-grained error locations are disabled.",
+    )
+    @skipUnless(PY311, "Fine-grained error locations were added in Python 3.11.")
+    def test_highlight_error_position(self):
+        request = self.rf.get("/test_view/")
+        try:
+            try:
+                raise AttributeError("Top level")
+            except AttributeError as explicit:
+                try:
+                    raise ValueError(mark_safe("<p>2nd exception</p>")) from explicit
+                except ValueError:
+                    raise IndexError("Final exception")
+        except Exception:
+            exc_type, exc_value, tb = sys.exc_info()
+
+        reporter = ExceptionReporter(request, exc_type, exc_value, tb)
+        html = reporter.get_traceback_html()
+        self.assertIn(
+            "<pre>                raise AttributeError(&quot;Top level&quot;)\n"
+            "                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^</pre>",
+            html,
+        )
+        self.assertIn(
+            "<pre>                    raise ValueError(mark_safe("
+            "&quot;&lt;p&gt;2nd exception&lt;/p&gt;&quot;)) from explicit\n"
+            "                         "
+            "^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^</pre>",
+            html,
+        )
+        self.assertIn(
+            "<pre>                    raise IndexError(&quot;Final exception&quot;)\n"
+            "                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^</pre>",
+            html,
+        )
+        # Pastebin.
+        self.assertIn(
+            "    raise AttributeError(&quot;Top level&quot;)\n"
+            "    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
+            html,
+        )
+        self.assertIn(
+            "    raise ValueError(mark_safe("
+            "&quot;&lt;p&gt;2nd exception&lt;/p&gt;&quot;)) from explicit\n"
+            "    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
+            html,
+        )
+        self.assertIn(
+            "    raise IndexError(&quot;Final exception&quot;)\n"
+            "    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
+            html,
+        )
+        # Text traceback.
+        text = reporter.get_traceback_text()
+        self.assertIn(
+            '    raise AttributeError("Top level")\n'
+            "    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
+            text,
+        )
+        self.assertIn(
+            '    raise ValueError(mark_safe("<p>2nd exception</p>")) from explicit\n'
+            "    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
+            text,
+        )
+        self.assertIn(
+            '    raise IndexError("Final exception")\n'
+            "    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
+            text,
+        )
+
     def test_reporting_frames_without_source(self):
         try:
             source = "def funcName():\n    raise Error('Whoops')\nfuncName()"