test(sla): add incident response SLA breach detection and noise reduction specs

keep/api/core/tests/wave12_incident_sla_test.py

@@ -0,0 +1,23 @@
+import unittest
+
+class TestWave12IncidentSLATimer(unittest.TestCase):
+    def test_sla_breach_detection(self):
+        critical_sla_seconds = 900 # 15 minutes
+
+        def is_sla_breached(elapsed_seconds: int, max_sla: int) -> bool:
+            return elapsed_seconds > max_sla
+
+        self.assertFalse(is_sla_breached(600, critical_sla_seconds))
+        self.assertTrue(is_sla_breached(950, critical_sla_seconds))
+
+    def test_alert_noise_reduction_ratio(self):
+        def calculate_noise_reduction(raw_alerts: int, grouped_incidents: int) -> float:
+            if raw_alerts == 0:
+                return 0.0
+            return ((raw_alerts - grouped_incidents) / raw_alerts) * 100.0
+
+        reduction = calculate_noise_reduction(100, 10)
+        self.assertEqual(reduction, 90.0)
+
+if __name__ == '__main__':
+    unittest.main()