promtool, tests, missing data

[robpie]

Hi there,

I wondering is it possible to simulate missing data in series defined in promtool tests.
Lets consider following test:

evaluation_interval: 1m
tests:
    - interval: 1m
      input_series:
          - series: 'metric{}'
            values: 0 4 0 10 2

      promql_expr_test:
          - expr: increase(metric[4m])
            eval_time: 4m
            exp_samples:
                - labels: 'metric{}'
                  value: 12

I would like to test scenario where second 0 in given value set is missing(let's say Prometheus couldn't scrap it for some reason). Is it possible?

Regards,

r

[David Leadbeater]

You can use “_” to mean missing data. There’s also the option of “stale”.

(This isn’t well documented right now, see e.g. 

https://github.com/prometheus/prometheus/issues/7887)

David

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