72 lines
2.6 KiB
Python
72 lines
2.6 KiB
Python
import unittest
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from detector.converger import AlertConverger
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from detector.models import Event
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from detector.storage import InMemoryAlertStore, InMemoryCache, InMemoryMessageBus
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def make_event(status="firing", host_id="h-1", rule_id="r-1", fired_at=100.0):
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return Event(
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event_id=f"e-{status}-{host_id}",
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host_id=host_id,
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rule_id=rule_id,
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metric="cpu_usage",
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agg_value=95.0,
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threshold=90.0,
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operator="gt",
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status=status,
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severity="critical",
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fired_at=fired_at,
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)
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class TestAlertConverger(unittest.TestCase):
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def setUp(self):
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self.store = InMemoryAlertStore()
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self.cache = InMemoryCache()
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self.bus = InMemoryMessageBus()
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self.converger = AlertConverger(
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self.store, self.cache, self.bus, dedup_window="5m", aggregate_window="1m",
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host_group_resolver=lambda h: "web",
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)
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def test_dedup_suppresses_duplicate(self):
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first = self.converger.handle_event(make_event())
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self.assertIsNotNone(first)
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second = self.converger.handle_event(make_event())
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self.assertIsNone(second)
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self.assertEqual(len(self.store.list_alerts()[1]), 1)
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def test_resolve_clears_dedup(self):
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self.converger.handle_event(make_event(fired_at=100.0))
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resolved = self.converger.handle_event(make_event(status="resolved", fired_at=200.0))
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self.assertIsNotNone(resolved)
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self.assertEqual(resolved.status, "resolved")
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# 去重键已清除，恢复后再次 firing 可以产生新告警
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again = self.converger.handle_event(make_event(fired_at=300.0))
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self.assertIsNotNone(again)
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def test_aggregate_same_bucket(self):
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a1 = self.converger.handle_event(make_event(host_id="h-1", fired_at=100.0))
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a2 = self.converger.handle_event(make_event(host_id="h-2", fired_at=110.0))
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self.assertIsNotNone(a1)
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self.assertIsNotNone(a2)
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alerts = self.store.list_alerts()[1]
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# 同一 aggregate_key（同 bucket/severity/rule/group）聚合为一条
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self.assertEqual(len(alerts), 1)
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self.assertEqual(alerts[0].count, 2)
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self.assertIn("h-1", alerts[0].detail["hosts"])
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self.assertIn("h-2", alerts[0].detail["hosts"])
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def test_publish_to_bus(self):
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self.converger.handle_event(make_event())
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self.assertEqual(len(self.bus.messages), 1)
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topic, key, value = self.bus.messages[0]
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self.assertEqual(topic, "alerts.converged")
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self.assertIn("alert_id", value)
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if __name__ == "__main__":
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unittest.main()
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