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promqltest: Add test for unary minus with native histograms 

This verifies that a counter histogram becomes a gauge histogram if an
unary minus is applied to it.

Signed-off-by: beorn7 <beorn@grafana.com>
This commit is contained in:
beorn7 2025-08-13 15:39:14 +02:00
parent caf24555a8
commit e326049e43
1 changed files with 6 additions and 0 deletions
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6
promql/promqltest/testdata/native_histograms.test vendored
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@ -1546,3 +1546,9 @@ eval instant at 5m rate(avg_over_time(metric{id="1"}[10m])[5m:])
expect warn regex: this native histogram metric is not a counter: "metric"
{id="1"} {{counter_reset_hint:gauge}}
# Unary minus turns counters into gauges.
eval instant at 5m -metric
expect no_warn
expect no_info
{id="1"} {{count:-4 sum:-4 counter_reset_hint:gauge buckets:[-1 -2 -1]}}
{id="2"} {{count:-4 sum:-4 counter_reset_hint:gauge buckets:[-1 -2 -1]}}