Add dummy waffle switch to test healthcheck e2e in any environment

Author: KevinMind

src/olympia/amo/migrations/0002_auto_20250319_1240.py

@@ -0,0 +1,16 @@
+# Generated by Django 4.2.20 on 2025-03-19 12:40
+
+from django.db import migrations
+
+from olympia.core.db.migrations import CreateWaffleSwitch
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('amo', '0001_initial'),
+    ]
+
+    operations = [
+        CreateWaffleSwitch('dummy-monitor-fails'),
+    ]

src/olympia/amo/monitors.py

@@ -12,6 +12,7 @@
 from django_statsd.clients import statsd
 from kombu import Connection
 from PIL import Image
+import waffle
 
 import olympia.core.logger
 from olympia.amo.models import use_primary_db
@@ -33,6 +34,10 @@ def execute_checks(checks: list[str], verbose: bool = False):
             status_summary[check]['results'] = results
     return status_summary
 
+def dummy_monitor():
+    if waffle.switch_is_active('dummy-monitor-fails'):
+        return 'Dummy monitor failed', None
+    return '', None
 
 def localdev_web():
     """

src/olympia/amo/tests/test_views.py

@@ -16,6 +16,7 @@
 import pytest
 from lxml import etree
 from pyquery import PyQuery as pq
+from waffle.testutils import override_switch
 
 from olympia import amo, core
 from olympia.access import acl
@@ -401,6 +402,19 @@ def test_front_heartbeat_failure(self):
         assert response.status_code >= 500
         assert response.json()['database']['status'] == 'boom'
 
+    def test_front_heartbeat_dummy_monitor_failure(self):
+        url = reverse('amo.front_heartbeat')
+        response = self.client.get(url)
+
+        assert response.status_code == 200
+        assert response.json()['dummy_monitor']['state'] == True
+
+        with override_switch('dummy-monitor-fails', True):
+            response = self.client.get(url)
+
+            assert response.status_code >= 500
+            assert response.json()['dummy_monitor']['status'] == 'Dummy monitor failed'
+
     def test_services_heartbeat_success(self):
         response = self.client.get(reverse('amo.services_heartbeat'))
         assert response.status_code == 200

src/olympia/amo/views.py

@@ -47,6 +47,7 @@ def front_heartbeat(request):
             'elastic',
             'path',
             'database',
+            'dummy_monitor',
         ]
     )