108 lines
3.7 KiB
Python
108 lines
3.7 KiB
Python
"""根因分析测试。"""
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import _bootstrap # noqa: F401
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import unittest
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from datetime import datetime, timezone
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from fault_log_analyzer.models import Event, FaultLog
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from fault_log_analyzer.root_cause import RootCauseAnalyzer
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BASE = datetime(2025, 1, 1, 10, 18, 0, tzinfo=timezone.utc)
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def _log(msg, host="h-1", trace=None, at=None, fid="fl-1"):
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return FaultLog(
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fault_log_id=fid,
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host_id=host,
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message=msg,
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trace_id=trace,
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occurred_at=at or BASE,
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)
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def _event(host="h-1", metric="disk_used_percent", value=97.2, threshold=90.0, at=None):
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return Event(
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event_id="e-1",
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host_id=host,
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metric=metric,
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value=value,
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threshold=threshold,
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fired_at=at or BASE,
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)
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class TestLogHints(unittest.TestCase):
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def test_disk_hint(self):
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rc = RootCauseAnalyzer().analyze(_log("no space left on device"), [])
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self.assertEqual(rc.cause_type, "disk_full")
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self.assertGreater(rc.confidence, 0.0)
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def test_memory_hint(self):
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rc = RootCauseAnalyzer().analyze(_log("out of memory killed"), [])
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self.assertEqual(rc.cause_type, "memory_exhausted")
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def test_unknown_when_no_signal(self):
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rc = RootCauseAnalyzer().analyze(_log("hello world"), [])
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self.assertEqual(rc.cause_type, "unknown")
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self.assertEqual(rc.confidence, 0.0)
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class TestMetricEvents(unittest.TestCase):
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def test_metric_event_rule(self):
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rc = RootCauseAnalyzer().analyze(_log("some error"), [_event()])
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self.assertEqual(rc.cause_type, "disk_full")
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self.assertGreater(rc.confidence, 0.0)
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def test_event_outside_window_ignored(self):
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later = datetime(2025, 1, 1, 11, 0, 0, tzinfo=timezone.utc)
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rc = RootCauseAnalyzer().analyze(_log("some error"), [_event(at=later)])
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self.assertEqual(rc.cause_type, "unknown")
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def test_different_host_event_ignored(self):
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rc = RootCauseAnalyzer().analyze(_log("some error"), [_event(host="h-2")])
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self.assertEqual(rc.cause_type, "unknown")
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def test_memory_metric_rule(self):
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event = _event(metric="mem_used_percent", value=95.0, threshold=90.0)
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rc = RootCauseAnalyzer().analyze(_log("some error"), [event])
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self.assertEqual(rc.cause_type, "memory_exhausted")
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class TestNaiveDatetimeRobustness(unittest.TestCase):
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"""跨模块时间比较防御性归一：上游可能传入 naive datetime。"""
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def test_naive_fault_log_and_naive_event(self):
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naive = datetime(2025, 1, 1, 10, 18, 0)
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log = _log("no space left on device", at=naive)
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event = _event(value=97.2, at=naive)
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rc = RootCauseAnalyzer().analyze(log, [event])
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self.assertEqual(rc.cause_type, "disk_full")
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def test_naive_event_with_aware_log(self):
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naive_event = _event(value=97.2, at=datetime(2025, 1, 1, 10, 18, 0))
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rc = RootCauseAnalyzer().analyze(_log("some error"), [naive_event])
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self.assertEqual(rc.cause_type, "disk_full")
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class TestTraceAssociation(unittest.TestCase):
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def test_trace_association(self):
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log = _log("request failed", trace="tr-1")
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related = FaultLog(
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fault_log_id="fl-2",
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host_id="h-1",
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message="out of memory",
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trace_id="tr-1",
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occurred_at=BASE,
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)
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rc = RootCauseAnalyzer().analyze(log, [], related_logs=[related])
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self.assertEqual(rc.cause_type, "memory_exhausted")
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def test_evidence_collected(self):
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rc = RootCauseAnalyzer().analyze(_log("no space left on device"), [_event()])
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types = {e["type"] for e in rc.evidence}
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self.assertIn("log", types)
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self.assertIn("event", types)
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if __name__ == "__main__":
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unittest.main()
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