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promqltest: add tests for `histogram_count(increase(...))` (#16854)
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As `histogram_count` is playing tricks to improve performance, we
better make sure that the limitation of extrapolation below zero still
works as expected.

Signed-off-by: beorn7 <beorn@grafana.com>
This commit is contained in:
Björn Rabenstein 2025-07-10 15:44:02 +02:00 committed by GitHub
parent 8397b738bf
commit eb3ea163fa
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13
promql/promqltest/testdata/native_histograms.test vendored
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@ -1416,3 +1416,16 @@ eval instant at 55m increase(metric[55m15s])
eval instant at 54m30s increase(metric[54m45s]) eval instant at 54m30s increase(metric[54m45s])
{type="histogram"} {{count:2509.375 sum:50.69444444444444 counter_reset_hint:gauge buckets:[10.13888888888889 2499.236111111111]}} {type="histogram"} {{count:2509.375 sum:50.69444444444444 counter_reset_hint:gauge buckets:[10.13888888888889 2499.236111111111]}}
{type="counter"} 2509.375 {type="counter"} 2509.375
# Try the same, but now extract just the histogram count via `histogram_count`.
eval instant at 55m histogram_count(increase(metric[90m]))
{type="histogram"} 2490
eval instant at 54m30s histogram_count(increase(metric[90m]))
{type="histogram"} 2512.9166666666665
eval instant at 55m histogram_count(increase(metric[55m15s]))
{type="histogram"} 2486.25
eval instant at 54m30s histogram_count(increase(metric[54m45s]))
{type="histogram"} 2509.375