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query_test.go
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query_test.go
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// Copyright (c) The Thanos Authors.
// Licensed under the Apache License 2.0.
package main
import (
"testing"
"time"
"github.com/go-kit/log"
"github.com/prometheus/prometheus/promql"
"github.com/thanos-io/thanos/pkg/testutil"
)
func TestEngineFactory(t *testing.T) {
var (
engineRaw = promql.NewEngine(promql.EngineOpts{})
engine5m = promql.NewEngine(promql.EngineOpts{LookbackDelta: 5 * time.Minute})
engine1h = promql.NewEngine(promql.EngineOpts{LookbackDelta: 1 * time.Hour})
)
mockNewEngine := func(opts promql.EngineOpts) *promql.Engine {
switch opts.LookbackDelta {
case 1 * time.Hour:
return engine1h
case 5 * time.Minute:
return engine5m
default:
return engineRaw
}
}
type testCase struct {
stepMillis int64
expect *promql.Engine
}
var (
minute = time.Minute.Milliseconds()
hour = time.Hour.Milliseconds()
tData = []struct {
lookbackDelta time.Duration
dynamicLookbackDelta bool
tcs []testCase
}{
{
// Non-dynamic lookbackDelta should always return the same engine.
lookbackDelta: 0,
dynamicLookbackDelta: false,
tcs: []testCase{
{0, engineRaw},
{5 * minute, engineRaw},
{1 * hour, engineRaw},
},
},
{
lookbackDelta: 3 * time.Minute,
dynamicLookbackDelta: true,
tcs: []testCase{
{2 * minute, engineRaw},
{3 * minute, engineRaw},
{4 * minute, engine5m},
{5 * minute, engine5m},
{6 * minute, engine1h},
{1 * hour, engine1h},
{2 * hour, engine1h},
},
},
{
lookbackDelta: 5 * time.Minute,
dynamicLookbackDelta: true,
tcs: []testCase{
{0, engine5m},
{5 * minute, engine5m},
{6 * minute, engine1h},
{59 * minute, engine1h},
{1 * hour, engine1h},
{2 * hour, engine1h},
},
},
{
lookbackDelta: 30 * time.Minute,
dynamicLookbackDelta: true,
tcs: []testCase{
{0, engineRaw},
{5 * minute, engineRaw},
{30 * minute, engineRaw},
{31 * minute, engine1h},
{59 * minute, engine1h},
{1 * hour, engine1h},
{2 * hour, engine1h},
},
},
{
lookbackDelta: 1 * time.Hour,
dynamicLookbackDelta: true,
tcs: []testCase{
{0, engine1h},
{5 * minute, engine1h},
{1 * hour, engine1h},
{2 * hour, engine1h},
},
},
}
)
for _, td := range tData {
e := engineFactory(mockNewEngine, promql.EngineOpts{LookbackDelta: td.lookbackDelta}, td.dynamicLookbackDelta,
"", 1, log.NewNopLogger())
for _, tc := range td.tcs {
got := e(tc.stepMillis)
testutil.Equals(t, tc.expect, got)
}
}
}