grafana/pkg/services/ngalert/backtesting/eval_query.go

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package backtesting
import (
"context"
"time"
"github.com/grafana/grafana/pkg/services/ngalert/eval"
)
// QueryEvaluator is evaluator of regular alert rule queries
type queryEvaluator struct {
eval eval.ConditionEvaluator
}
func (d *queryEvaluator) Eval(ctx context.Context, from, to time.Time, interval time.Duration, callback callbackFunc) error {
for now := from; now.Before(to); now = now.Add(interval) {
results, err := d.eval.Evaluate(ctx, now)
if err != nil {
return err
}
err = callback(now, results)
if err != nil {
return err
}
}
return nil
}