prometheus/cmd/promtool/testdata/unittest.yml

rule_files:
  - alerts.yml

evaluation_interval: 1m

tests:
  - interval: 1m
    input_series:
      - series: 'up{job="prometheus", instance="localhost:9090"}'
        values: "0+0x1440"

    promql_expr_test:
      - expr: count(ALERTS) by (alertname, alertstate)
        eval_time: 4m
        exp_samples:
        - labels: '{alertname="InstanceDown",alertstate="pending"}'
          value: 1

    alert_rule_test:
      - eval_time: 1d
        alertname: InstanceDown
        exp_alerts:
          - exp_labels:
              severity: page
              instance: localhost:9090
              job: prometheus
            exp_annotations:
              summary: "Instance localhost:9090 down"
              description: "localhost:9090 of job prometheus has been down for more than 5 minutes."