wehub-resource-sync
4b6817381b
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65 lines
2.3 KiB
Python
65 lines
2.3 KiB
Python
"""Unit tests for the enriched metric summary helper.
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Pins the agent-facing fields (`mean`, `p95`, `delta`, `delta_pct`,
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`window_minutes`) added so agents can summarize raw Prometheus series
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without misreading spikes and baselines.
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"""
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from __future__ import annotations
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from platform.common.metric_summary import summarize_prometheus_metrics
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def _series(metric_name: str, points: list[tuple[float, float]]) -> dict[str, object]:
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"""Build a Prometheus matrix-style series."""
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return {
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"metric": {"__name__": metric_name, "dbinstanceidentifier": "orders-prod"},
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"values": [[ts, str(v)] for ts, v in points],
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}
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def test_summary_includes_mean_p95_delta_window_minutes() -> None:
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# 15 minute rising trend, 60s period.
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base = 1_700_000_000.0
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points = [(base + i * 60, float(i)) for i in range(16)] # values 0..15
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[summary] = summarize_prometheus_metrics([_series("cpu_utilization_average", points)])
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assert summary["first"] == 0.0
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assert summary["latest"] == 15.0
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assert summary["min"] == 0.0
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assert summary["max"] == 15.0
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assert summary["mean"] == 7.5
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# p95 over [0..15] linearly interpolated at rank 14.25 → 14.25
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assert summary["p95"] == 14.25
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assert summary["delta"] == 15.0
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assert summary["delta_pct"].startswith("+")
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assert summary["window_minutes"] == 15.0
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assert summary["datapoint_count"] == 16
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assert "increased" in summary["trend"]
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def test_flat_series_reports_zero_delta() -> None:
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base = 1_700_000_000.0
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points = [(base + i * 60, 25.0) for i in range(15)]
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[summary] = summarize_prometheus_metrics([_series("cpu_utilization_average", points)])
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assert summary["delta"] == 0.0
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assert summary["mean"] == 25.0
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assert summary["p95"] == 25.0
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def test_single_datapoint_summary_is_well_defined() -> None:
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[summary] = summarize_prometheus_metrics(
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[_series("cpu_utilization_average", [(1_700_000_000.0, 42.0)])]
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)
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assert summary["mean"] == 42.0
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assert summary["p95"] == 42.0
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assert summary["window_minutes"] == 0.0
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def test_empty_series_does_not_crash() -> None:
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[summary] = summarize_prometheus_metrics([_series("cpu_utilization_average", [])])
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assert summary["trend"] == "no datapoints"
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# Optional enriched fields should not be present without datapoints.
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assert "mean" not in summary
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assert "p95" not in summary
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