Added support for async to timer panel

.gitignore

@@ -15,5 +15,5 @@ coverage.xml
 venv
 .direnv/
 .envrc
-venv
+.venv
 .vscode

debug_toolbar/panels/timer.py

@@ -17,6 +17,8 @@ class TimerPanel(Panel):
     Panel that displays the time a response took in milliseconds.
     """
 
+    is_async = True
+
     def nav_subtitle(self):
         stats = self.get_stats()
         if stats.get("utime"):

docs/architecture.rst

@@ -81,7 +81,7 @@ Problematic Parts
   the main benefit of the toolbar
 - Support for async and multi-threading: ``debug_toolbar.middleware.DebugToolbarMiddleware``
   is now async compatible and can process async requests. However certain
-  panels such as ``TimerPanel``, ``RequestPanel`` and ``ProfilingPanel`` aren't
+  panels such as ``RequestPanel`` and ``ProfilingPanel`` aren't
   fully compatible and currently being worked on. For now, these panels
   are disabled by default when running in async environment.
   follow the progress of this issue in `Async compatible toolbar project <https://github.com/orgs/jazzband/projects/9>`_.

docs/changes.rst

@@ -4,6 +4,7 @@ Change log
 Pending
 -------
 
+* Added support for async to timer panel.
 * Added a note about the default password in ``make example``.
 * Removed logging about the toolbar failing to serialize a value into JSON.
 * Moved the the import statement of ``debug_toolbar.urls`` to within the if

tests/test_integration_async.py

@@ -1,3 +1,4 @@
+import re
 import unittest
 from unittest.mock import patch
 
@@ -506,6 +507,29 @@ async def test_intercept_redirects(self):
         # Link to LOCATION header.
         self.assertIn(b'href="/regular/redirect/"', response.content)
 
+    async def test_server_timing_headers(self):
+        response = await self.async_client.get("/execute_sql/")
+        server_timing = response["Server-Timing"]
+        expected_partials = [
+            r'TimerPanel_utime;dur=(\d)*(\.(\d)*)?;desc="User CPU time", ',
+            r'TimerPanel_stime;dur=(\d)*(\.(\d)*)?;desc="System CPU time", ',
+            r'TimerPanel_total;dur=(\d)*(\.(\d)*)?;desc="Total CPU time", ',
+            r'TimerPanel_total_time;dur=(\d)*(\.(\d)*)?;desc="Elapsed time", ',
+            r'SQLPanel_sql_time;dur=(\d)*(\.(\d)*)?;desc="SQL 1 queries", ',
+            r'CachePanel_total_time;dur=0;desc="Cache 0 Calls"',
+        ]
+        for expected in expected_partials:
+            self.assertTrue(re.compile(expected).search(server_timing))
+
+    @override_settings(DEBUG_TOOLBAR_CONFIG={"RENDER_PANELS": True})
+    async def test_timer_panel(self):
+        response = await self.async_client.get("/regular/basic/")
+        self.assertEqual(response.status_code, 200)
+        self.assertContains(
+            response,
+            '<script type="module" src="/static/debug_toolbar/js/timer.js" async>',
+        )
+
     async def test_auth_login_view_without_redirect(self):
         response = await self.async_client.get("/login_without_redirect/")
         self.assertEqual(response.status_code, 200)