// Copyright 2016 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package promql
import (
"context"
"errors"
"io/ioutil"
"os"
"sort"
"testing"
"time"
"github.com/go-kit/kit/log"
"github.com/stretchr/testify/require"
"go.uber.org/goleak"
"github.com/prometheus/prometheus/pkg/labels"
"github.com/prometheus/prometheus/pkg/timestamp"
"github.com/prometheus/prometheus/promql/parser"
"github.com/prometheus/prometheus/storage"
)
func TestMain(m *testing.M) {
goleak.VerifyTestMain(m)
}
func TestQueryConcurrency(t *testing.T) {
maxConcurrency := 10
dir, err := ioutil.TempDir("", "test_concurrency")
require.NoError(t, err)
defer os.RemoveAll(dir)
queryTracker := NewActiveQueryTracker(dir, maxConcurrency, nil)
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxSamples: 10,
Timeout: 100 * time.Second,
ActiveQueryTracker: queryTracker,
}
engine := NewEngine(opts)
ctx, cancelCtx := context.WithCancel(context.Background())
defer cancelCtx()
block := make(chan struct{})
processing := make(chan struct{})
f := func(context.Context) error {
processing <- struct{}{}
<-block
return nil
}
for i := 0; i < maxConcurrency; i++ {
q := engine.newTestQuery(f)
go q.Exec(ctx)
select {
case <-processing:
// Expected.
case <-time.After(20 * time.Millisecond):
t.Fatalf("Query within concurrency threshold not being executed")
}
}
q := engine.newTestQuery(f)
go q.Exec(ctx)
select {
case <-processing:
t.Fatalf("Query above concurrency threshold being executed")
case <-time.After(20 * time.Millisecond):
// Expected.
}
// Terminate a running query.
block <- struct{}{}
select {
case <-processing:
// Expected.
case <-time.After(20 * time.Millisecond):
t.Fatalf("Query within concurrency threshold not being executed")
}
// Terminate remaining queries.
for i := 0; i < maxConcurrency; i++ {
block <- struct{}{}
}
}
func TestQueryTimeout(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxSamples: 10,
Timeout: 5 * time.Millisecond,
}
engine := NewEngine(opts)
ctx, cancelCtx := context.WithCancel(context.Background())
defer cancelCtx()
query := engine.newTestQuery(func(ctx context.Context) error {
time.Sleep(100 * time.Millisecond)
return contextDone(ctx, "test statement execution")
})
res := query.Exec(ctx)
require.Error(t, res.Err, "expected timeout error but got none")
var e ErrQueryTimeout
require.True(t, errors.As(res.Err, &e), "expected timeout error but got: %s", res.Err)
}
const errQueryCanceled = ErrQueryCanceled("test statement execution")
func TestQueryCancel(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxSamples: 10,
Timeout: 10 * time.Second,
}
engine := NewEngine(opts)
ctx, cancelCtx := context.WithCancel(context.Background())
defer cancelCtx()
// Cancel a running query before it completes.
block := make(chan struct{})
processing := make(chan struct{})
query1 := engine.newTestQuery(func(ctx context.Context) error {
processing <- struct{}{}
<-block
return contextDone(ctx, "test statement execution")
})
var res *Result
go func() {
res = query1.Exec(ctx)
processing <- struct{}{}
}()
<-processing
query1.Cancel()
block <- struct{}{}
<-processing
require.Error(t, res.Err, "expected cancellation error for query1 but got none")
require.Equal(t, errQueryCanceled, res.Err)
// Canceling a query before starting it must have no effect.
query2 := engine.newTestQuery(func(ctx context.Context) error {
return contextDone(ctx, "test statement execution")
})
query2.Cancel()
res = query2.Exec(ctx)
require.NoError(t, res.Err)
}
// errQuerier implements storage.Querier which always returns error.
type errQuerier struct {
err error
}
func (q *errQuerier) Select(bool, *storage.SelectHints, ...*labels.Matcher) storage.SeriesSet {
return errSeriesSet{err: q.err}
}
func (*errQuerier) LabelValues(string) ([]string, storage.Warnings, error) { return nil, nil, nil }
func (*errQuerier) LabelNames() ([]string, storage.Warnings, error) { return nil, nil, nil }
func (*errQuerier) Close() error { return nil }
// errSeriesSet implements storage.SeriesSet which always returns error.
type errSeriesSet struct {
err error
}
func (errSeriesSet) Next() bool { return false }
func (errSeriesSet) At() storage.Series { return nil }
func (e errSeriesSet) Err() error { return e.err }
func (e errSeriesSet) Warnings() storage.Warnings { return nil }
func TestQueryError(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxSamples: 10,
Timeout: 10 * time.Second,
}
engine := NewEngine(opts)
errStorage := ErrStorage{errors.New("storage error")}
queryable := storage.QueryableFunc(func(ctx context.Context, mint, maxt int64) (storage.Querier, error) {
return &errQuerier{err: errStorage}, nil
})
ctx, cancelCtx := context.WithCancel(context.Background())
defer cancelCtx()
vectorQuery, err := engine.NewInstantQuery(queryable, "foo", time.Unix(1, 0))
require.NoError(t, err)
res := vectorQuery.Exec(ctx)
require.Error(t, res.Err, "expected error on failed select but got none")
require.True(t, errors.Is(res.Err, errStorage), "expected error doesn't match")
matrixQuery, err := engine.NewInstantQuery(queryable, "foo[1m]", time.Unix(1, 0))
require.NoError(t, err)
res = matrixQuery.Exec(ctx)
require.Error(t, res.Err, "expected error on failed select but got none")
require.True(t, errors.Is(res.Err, errStorage), "expected error doesn't match")
}
type noopHintRecordingQueryable struct {
hints []*storage.SelectHints
}
func (h *noopHintRecordingQueryable) Querier(context.Context, int64, int64) (storage.Querier, error) {
return &hintRecordingQuerier{Querier: &errQuerier{}, h: h}, nil
}
type hintRecordingQuerier struct {
storage.Querier
h *noopHintRecordingQueryable
}
func (h *hintRecordingQuerier) Select(sortSeries bool, hints *storage.SelectHints, matchers ...*labels.Matcher) storage.SeriesSet {
h.h.hints = append(h.h.hints, hints)
return h.Querier.Select(sortSeries, hints, matchers...)
}
func TestSelectHintsSetCorrectly(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxSamples: 10,
Timeout: 10 * time.Second,
LookbackDelta: 5 * time.Second,
}
for _, tc := range []struct {
query string
// All times are in milliseconds.
start int64
end int64
// TODO(bwplotka): Add support for better hints when subquerying.
expected []*storage.SelectHints
}{{
query: "foo", start: 10000,
expected: []*storage.SelectHints{
{Start: 5000, End: 10000},
},
}, {
query: "foo[2m]", start: 200000,
expected: []*storage.SelectHints{
{Start: 80000, End: 200000, Range: 120000},
},
}, {
query: "foo[2m] offset 2m", start: 300000,
expected: []*storage.SelectHints{
{Start: 60000, End: 180000, Range: 120000},
},
}, {
query: "foo[2m:1s]", start: 300000,
expected: []*storage.SelectHints{
{Start: 175000, End: 300000},
},
}, {
query: "count_over_time(foo[2m:1s])", start: 300000,
expected: []*storage.SelectHints{
{Start: 175000, End: 300000, Func: "count_over_time"},
},
}, {
query: "count_over_time(foo[2m:1s] offset 10s)", start: 300000,
expected: []*storage.SelectHints{
{Start: 165000, End: 290000, Func: "count_over_time"},
},
}, {
query: "count_over_time((foo offset 10s)[2m:1s] offset 10s)", start: 300000,
expected: []*storage.SelectHints{
{Start: 155000, End: 280000, Func: "count_over_time"},
},
}, {
query: "foo", start: 10000, end: 20000,
expected: []*storage.SelectHints{
{Start: 5000, End: 20000, Step: 1000},
},
}, {
query: "rate(foo[2m])", start: 200000, end: 500000,
expected: []*storage.SelectHints{
{Start: 80000, End: 500000, Range: 120000, Func: "rate", Step: 1000},
},
}, {
query: "rate(foo[2m] offset 2m)", start: 300000, end: 500000,
expected: []*storage.SelectHints{
{Start: 60000, End: 380000, Range: 120000, Func: "rate", Step: 1000},
},
}, {
query: "rate(foo[2m:1s])", start: 300000, end: 500000,
expected: []*storage.SelectHints{
{Start: 175000, End: 500000, Func: "rate", Step: 1000},
},
}, {
query: "count_over_time(foo[2m:1s])", start: 300000, end: 500000,
expected: []*storage.SelectHints{
{Start: 175000, End: 500000, Func: "count_over_time", Step: 1000},
},
}, {
query: "count_over_time(foo[2m:1s] offset 10s)", start: 300000, end: 500000,
expected: []*storage.SelectHints{
{Start: 165000, End: 490000, Func: "count_over_time", Step: 1000},
},
}, {
query: "count_over_time((foo offset 10s)[2m:1s] offset 10s)", start: 300000, end: 500000,
expected: []*storage.SelectHints{
{Start: 155000, End: 480000, Func: "count_over_time", Step: 1000},
},
}, {
query: "sum by (dim1) (foo)", start: 10000,
expected: []*storage.SelectHints{
{Start: 5000, End: 10000, Func: "sum", By: true, Grouping: []string{"dim1"}},
},
}, {
query: "sum without (dim1) (foo)", start: 10000,
expected: []*storage.SelectHints{
{Start: 5000, End: 10000, Func: "sum", Grouping: []string{"dim1"}},
},
}, {
query: "sum by (dim1) (avg_over_time(foo[1s]))", start: 10000,
expected: []*storage.SelectHints{
{Start: 9000, End: 10000, Func: "avg_over_time", Range: 1000},
},
}, {
query: "sum by (dim1) (max by (dim2) (foo))", start: 10000,
expected: []*storage.SelectHints{
{Start: 5000, End: 10000, Func: "max", By: true, Grouping: []string{"dim2"}},
},
}, {
query: "(max by (dim1) (foo))[5s:1s]", start: 10000,
expected: []*storage.SelectHints{
{Start: 0, End: 10000, Func: "max", By: true, Grouping: []string{"dim1"}},
},
}, {
query: "(sum(http_requests{group=~\"p.*\"})+max(http_requests{group=~\"c.*\"}))[20s:5s]", start: 120000,
expected: []*storage.SelectHints{
{Start: 95000, End: 120000, Func: "sum", By: true},
{Start: 95000, End: 120000, Func: "max", By: true},
},
}} {
t.Run(tc.query, func(t *testing.T) {
engine := NewEngine(opts)
hintsRecorder := &noopHintRecordingQueryable{}
var (
query Query
err error
)
if tc.end == 0 {
query, err = engine.NewInstantQuery(hintsRecorder, tc.query, timestamp.Time(tc.start))
} else {
query, err = engine.NewRangeQuery(hintsRecorder, tc.query, timestamp.Time(tc.start), timestamp.Time(tc.end), time.Second)
}
require.NoError(t, err)
res := query.Exec(context.Background())
require.NoError(t, res.Err)
require.Equal(t, tc.expected, hintsRecorder.hints)
})
}
}
func TestEngineShutdown(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxSamples: 10,
Timeout: 10 * time.Second,
}
engine := NewEngine(opts)
ctx, cancelCtx := context.WithCancel(context.Background())
block := make(chan struct{})
processing := make(chan struct{})
// Shutdown engine on first handler execution. Should handler execution ever become
// concurrent this test has to be adjusted accordingly.
f := func(ctx context.Context) error {
processing <- struct{}{}
<-block
return contextDone(ctx, "test statement execution")
}
query1 := engine.newTestQuery(f)
// Stopping the engine must cancel the base context. While executing queries is
// still possible, their context is canceled from the beginning and execution should
// terminate immediately.
var res *Result
go func() {
res = query1.Exec(ctx)
processing <- struct{}{}
}()
<-processing
cancelCtx()
block <- struct{}{}
<-processing
require.Error(t, res.Err, "expected error on shutdown during query but got none")
require.Equal(t, errQueryCanceled, res.Err)
query2 := engine.newTestQuery(func(context.Context) error {
t.Fatalf("reached query execution unexpectedly")
return nil
})
// The second query is started after the engine shut down. It must
// be canceled immediately.
res2 := query2.Exec(ctx)
require.Error(t, res2.Err, "expected error on querying with canceled context but got none")
var e ErrQueryCanceled
require.True(t, errors.As(res2.Err, &e), "expected cancellation error but got: %s", res2.Err)
}
func TestEngineEvalStmtTimestamps(t *testing.T) {
test, err := NewTest(t, `
load 10s
metric 1 2
`)
require.NoError(t, err)
defer test.Close()
err = test.Run()
require.NoError(t, err)
cases := []struct {
Query string
Result parser.Value
Start time.Time
End time.Time
Interval time.Duration
ShouldError bool
}{
// Instant queries.
{
Query: "1",
Result: Scalar{V: 1, T: 1000},
Start: time.Unix(1, 0),
},
{
Query: "metric",
Result: Vector{
Sample{Point: Point{V: 1, T: 1000},
Metric: labels.FromStrings("__name__", "metric")},
},
Start: time.Unix(1, 0),
},
{
Query: "metric[20s]",
Result: Matrix{Series{
Points: []Point{{V: 1, T: 0}, {V: 2, T: 10000}},
Metric: labels.FromStrings("__name__", "metric")},
},
Start: time.Unix(10, 0),
},
// Range queries.
{
Query: "1",
Result: Matrix{Series{
Points: []Point{{V: 1, T: 0}, {V: 1, T: 1000}, {V: 1, T: 2000}},
Metric: labels.FromStrings()},
},
Start: time.Unix(0, 0),
End: time.Unix(2, 0),
Interval: time.Second,
},
{
Query: "metric",
Result: Matrix{Series{
Points: []Point{{V: 1, T: 0}, {V: 1, T: 1000}, {V: 1, T: 2000}},
Metric: labels.FromStrings("__name__", "metric")},
},
Start: time.Unix(0, 0),
End: time.Unix(2, 0),
Interval: time.Second,
},
{
Query: "metric",
Result: Matrix{Series{
Points: []Point{{V: 1, T: 0}, {V: 1, T: 5000}, {V: 2, T: 10000}},
Metric: labels.FromStrings("__name__", "metric")},
},
Start: time.Unix(0, 0),
End: time.Unix(10, 0),
Interval: 5 * time.Second,
},
{
Query: `count_values("wrong label!", metric)`,
ShouldError: true,
},
}
for _, c := range cases {
var err error
var qry Query
if c.Interval == 0 {
qry, err = test.QueryEngine().NewInstantQuery(test.Queryable(), c.Query, c.Start)
} else {
qry, err = test.QueryEngine().NewRangeQuery(test.Queryable(), c.Query, c.Start, c.End, c.Interval)
}
require.NoError(t, err)
res := qry.Exec(test.Context())
if c.ShouldError {
require.Error(t, res.Err, "expected error for the query %q", c.Query)
continue
}
require.NoError(t, res.Err)
require.Equal(t, c.Result, res.Value, "query %q failed", c.Query)
}
}
func TestMaxQuerySamples(t *testing.T) {
test, err := NewTest(t, `
load 10s
metric 1 2
bigmetric{a="1"} 1 2
bigmetric{a="2"} 1 2
`)
require.NoError(t, err)
defer test.Close()
err = test.Run()
require.NoError(t, err)
cases := []struct {
Query string
MaxSamples int
Result Result
Start time.Time
End time.Time
Interval time.Duration
}{
// Instant queries.
{
Query: "1",
MaxSamples: 1,
Result: Result{
nil,
Scalar{V: 1, T: 1000},
nil},
Start: time.Unix(1, 0),
},
{
Query: "1",
MaxSamples: 0,
Result: Result{
ErrTooManySamples(env),
nil,
nil,
},
Start: time.Unix(1, 0),
},
{
Query: "metric",
MaxSamples: 0,
Result: Result{
ErrTooManySamples(env),
nil,
nil,
},
Start: time.Unix(1, 0),
},
{
Query: "metric",
MaxSamples: 1,
Result: Result{
nil,
Vector{
Sample{Point: Point{V: 1, T: 1000},
Metric: labels.FromStrings("__name__", "metric")},
},
nil,
},
Start: time.Unix(1, 0),
},
{
Query: "metric[20s]",
MaxSamples: 2,
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 1, T: 0}, {V: 2, T: 10000}},
Metric: labels.FromStrings("__name__", "metric")},
},
nil,
},
Start: time.Unix(10, 0),
},
{
Query: "rate(metric[20s])",
MaxSamples: 3,
Result: Result{
nil,
Vector{
Sample{
Point: Point{V: 0.1, T: 10000},
Metric: labels.Labels{},
},
},
nil,
},
Start: time.Unix(10, 0),
},
{
Query: "metric[20s:5s]",
MaxSamples: 3,
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 1, T: 0}, {V: 1, T: 5000}, {V: 2, T: 10000}},
Metric: labels.FromStrings("__name__", "metric")},
},
nil,
},
Start: time.Unix(10, 0),
},
{
Query: "metric[20s]",
MaxSamples: 0,
Result: Result{
ErrTooManySamples(env),
nil,
nil,
},
Start: time.Unix(10, 0),
},
// Range queries.
{
Query: "1",
MaxSamples: 3,
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 1, T: 0}, {V: 1, T: 1000}, {V: 1, T: 2000}},
Metric: labels.FromStrings()},
},
nil,
},
Start: time.Unix(0, 0),
End: time.Unix(2, 0),
Interval: time.Second,
},
{
Query: "1",
MaxSamples: 0,
Result: Result{
ErrTooManySamples(env),
nil,
nil,
},
Start: time.Unix(0, 0),
End: time.Unix(2, 0),
Interval: time.Second,
},
{
Query: "metric",
MaxSamples: 3,
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 1, T: 0}, {V: 1, T: 1000}, {V: 1, T: 2000}},
Metric: labels.FromStrings("__name__", "metric")},
},
nil,
},
Start: time.Unix(0, 0),
End: time.Unix(2, 0),
Interval: time.Second,
},
{
Query: "metric",
MaxSamples: 2,
Result: Result{
ErrTooManySamples(env),
nil,
nil,
},
Start: time.Unix(0, 0),
End: time.Unix(2, 0),
Interval: time.Second,
},
{
Query: "metric",
MaxSamples: 3,
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 1, T: 0}, {V: 1, T: 5000}, {V: 2, T: 10000}},
Metric: labels.FromStrings("__name__", "metric")},
},
nil,
},
Start: time.Unix(0, 0),
End: time.Unix(10, 0),
Interval: 5 * time.Second,
},
{
Query: "metric",
MaxSamples: 2,
Result: Result{
ErrTooManySamples(env),
nil,
nil,
},
Start: time.Unix(0, 0),
End: time.Unix(10, 0),
Interval: 5 * time.Second,
},
{
Query: "rate(bigmetric[1s])",
MaxSamples: 1,
Result: Result{
nil,
Matrix{},
nil,
},
Start: time.Unix(0, 0),
End: time.Unix(10, 0),
Interval: 5 * time.Second,
},
}
engine := test.QueryEngine()
for _, c := range cases {
var err error
var qry Query
engine.maxSamplesPerQuery = c.MaxSamples
if c.Interval == 0 {
qry, err = engine.NewInstantQuery(test.Queryable(), c.Query, c.Start)
} else {
qry, err = engine.NewRangeQuery(test.Queryable(), c.Query, c.Start, c.End, c.Interval)
}
require.NoError(t, err)
res := qry.Exec(test.Context())
require.Equal(t, c.Result.Err, res.Err)
require.Equal(t, c.Result.Value, res.Value, "query %q failed", c.Query)
}
}
func TestRecoverEvaluatorRuntime(t *testing.T) {
ev := &evaluator{logger: log.NewNopLogger()}
var err error
defer ev.recover(nil, &err)
// Cause a runtime panic.
var a []int
//nolint:govet
a[123] = 1
if err.Error() != "unexpected error" {
t.Fatalf("wrong error message: %q, expected %q", err, "unexpected error")
}
}
func TestRecoverEvaluatorError(t *testing.T) {
ev := &evaluator{logger: log.NewNopLogger()}
var err error
e := errors.New("custom error")
defer func() {
if err.Error() != e.Error() {
t.Fatalf("wrong error message: %q, expected %q", err, e)
}
}()
defer ev.recover(nil, &err)
panic(e)
}
func TestRecoverEvaluatorErrorWithWarnings(t *testing.T) {
ev := &evaluator{logger: log.NewNopLogger()}
var err error
var ws storage.Warnings
warnings := storage.Warnings{errors.New("custom warning")}
e := errWithWarnings{
err: errors.New("custom error"),
warnings: warnings,
}
defer func() {
if err.Error() != e.Error() {
t.Fatalf("wrong error message: %q, expected %q", err, e)
}
if len(ws) != len(warnings) && ws[0] != warnings[0] {
t.Fatalf("wrong warning message: %q, expected %q", ws[0], warnings[0])
}
}()
defer ev.recover(&ws, &err)
panic(e)
}
func TestSubquerySelector(t *testing.T) {
type caseType struct {
Query string
Result Result
Start time.Time
}
for _, tst := range []struct {
loadString string
cases []caseType
}{
{
loadString: `load 10s
metric 1 2`,
cases: []caseType{
{
Query: "metric[20s:10s]",
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 1, T: 0}, {V: 2, T: 10000}},
Metric: labels.FromStrings("__name__", "metric")},
},
nil,
},
Start: time.Unix(10, 0),
},
{
Query: "metric[20s:5s]",
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 1, T: 0}, {V: 1, T: 5000}, {V: 2, T: 10000}},
Metric: labels.FromStrings("__name__", "metric")},
},
nil,
},
Start: time.Unix(10, 0),
},
{
Query: "metric[20s:5s] offset 2s",
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 1, T: 0}, {V: 1, T: 5000}, {V: 2, T: 10000}},
Metric: labels.FromStrings("__name__", "metric")},
},
nil,
},
Start: time.Unix(12, 0),
},
{
Query: "metric[20s:5s] offset 6s",
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 1, T: 0}, {V: 1, T: 5000}, {V: 2, T: 10000}},
Metric: labels.FromStrings("__name__", "metric")},
},
nil,
},
Start: time.Unix(20, 0),
},
{
Query: "metric[20s:5s] offset 4s",
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 2, T: 15000}, {V: 2, T: 20000}, {V: 2, T: 25000}, {V: 2, T: 30000}},
Metric: labels.FromStrings("__name__", "metric")},
},
nil,
},
Start: time.Unix(35, 0),
},
{
Query: "metric[20s:5s] offset 5s",
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 2, T: 10000}, {V: 2, T: 15000}, {V: 2, T: 20000}, {V: 2, T: 25000}, {V: 2, T: 30000}},
Metric: labels.FromStrings("__name__", "metric")},
},
nil,
},
Start: time.Unix(35, 0),
},
{
Query: "metric[20s:5s] offset 6s",
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 2, T: 10000}, {V: 2, T: 15000}, {V: 2, T: 20000}, {V: 2, T: 25000}},
Metric: labels.FromStrings("__name__", "metric")},
},
nil,
},
Start: time.Unix(35, 0),
},
{
Query: "metric[20s:5s] offset 7s",
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 2, T: 10000}, {V: 2, T: 15000}, {V: 2, T: 20000}, {V: 2, T: 25000}},
Metric: labels.FromStrings("__name__", "metric")},
},
nil,
},
Start: time.Unix(35, 0),
},
},
},
{
loadString: `load 10s
http_requests{job="api-server", instance="0", group="production"} 0+10x1000 100+30x1000
http_requests{job="api-server", instance="1", group="production"} 0+20x1000 200+30x1000
http_requests{job="api-server", instance="0", group="canary"} 0+30x1000 300+80x1000
http_requests{job="api-server", instance="1", group="canary"} 0+40x2000`,
cases: []caseType{
{ // Normal selector.
Query: `http_requests{group=~"pro.*",instance="0"}[30s:10s]`,
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 9990, T: 9990000}, {V: 10000, T: 10000000}, {V: 100, T: 10010000}, {V: 130, T: 10020000}},
Metric: labels.FromStrings("__name__", "http_requests", "job", "api-server", "instance", "0", "group", "production")},
},
nil,
},
Start: time.Unix(10020, 0),
},
{ // Default step.
Query: `http_requests{group=~"pro.*",instance="0"}[5m:]`,
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 9840, T: 9840000}, {V: 9900, T: 9900000}, {V: 9960, T: 9960000}, {V: 130, T: 10020000}, {V: 310, T: 10080000}},
Metric: labels.FromStrings("__name__", "http_requests", "job", "api-server", "instance", "0", "group", "production")},
},
nil,
},
Start: time.Unix(10100, 0),
},
{ // Checking if high offset (>LookbackDelta) is being taken care of.
Query: `http_requests{group=~"pro.*",instance="0"}[5m:] offset 20m`,
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 8640, T: 8640000}, {V: 8700, T: 8700000}, {V: 8760, T: 8760000}, {V: 8820, T: 8820000}, {V: 8880, T: 8880000}},
Metric: labels.FromStrings("__name__", "http_requests", "job", "api-server", "instance", "0", "group", "production")},
},
nil,
},
Start: time.Unix(10100, 0),
},
{
Query: `rate(http_requests[1m])[15s:5s]`,
Result: Result{
nil,
Matrix{
Series{
Points: []Point{{V: 3, T: 7985000}, {V: 3, T: 7990000}, {V: 3, T: 7995000}, {V: 3, T: 8000000}},
Metric: labels.FromStrings("job", "api-server", "instance", "0", "group", "canary"),
},
Series{
Points: []Point{{V: 4, T: 7985000}, {V: 4, T: 7990000}, {V: 4, T: 7995000}, {V: 4, T: 8000000}},
Metric: labels.FromStrings("job", "api-server", "instance", "1", "group", "canary"),
},
Series{
Points: []Point{{V: 1, T: 7985000}, {V: 1, T: 7990000}, {V: 1, T: 7995000}, {V: 1, T: 8000000}},
Metric: labels.FromStrings("job", "api-server", "instance", "0", "group", "production"),
},
Series{
Points: []Point{{V: 2, T: 7985000}, {V: 2, T: 7990000}, {V: 2, T: 7995000}, {V: 2, T: 8000000}},
Metric: labels.FromStrings("job", "api-server", "instance", "1", "group", "production"),
},
},
nil,
},
Start: time.Unix(8000, 0),
},
{
Query: `sum(http_requests{group=~"pro.*"})[30s:10s]`,
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 270, T: 90000}, {V: 300, T: 100000}, {V: 330, T: 110000}, {V: 360, T: 120000}},
Metric: labels.Labels{}},
},
nil,
},
Start: time.Unix(120, 0),
},
{
Query: `sum(http_requests)[40s:10s]`,
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 800, T: 80000}, {V: 900, T: 90000}, {V: 1000, T: 100000}, {V: 1100, T: 110000}, {V: 1200, T: 120000}},
Metric: labels.Labels{}},
},
nil,
},
Start: time.Unix(120, 0),
},
{
Query: `(sum(http_requests{group=~"p.*"})+sum(http_requests{group=~"c.*"}))[20s:5s]`,
Result: Result{
nil,
Matrix{Series{
Points: []Point{{V: 1000, T: 100000}, {V: 1000, T: 105000}, {V: 1100, T: 110000}, {V: 1100, T: 115000}, {V: 1200, T: 120000}},
Metric: labels.Labels{}},
},
nil,
},
Start: time.Unix(120, 0),
},
},
},
} {
t.Run("", func(t *testing.T) {
test, err := NewTest(t, tst.loadString)
require.NoError(t, err)
defer test.Close()
require.NoError(t, test.Run())
engine := test.QueryEngine()
for _, c := range tst.cases {
t.Run(c.Query, func(t *testing.T) {
qry, err := engine.NewInstantQuery(test.Queryable(), c.Query, c.Start)
require.NoError(t, err)
res := qry.Exec(test.Context())
require.Equal(t, c.Result.Err, res.Err)
mat := res.Value.(Matrix)
sort.Sort(mat)
require.Equal(t, c.Result.Value, mat)
})
}
})
}
}
type FakeQueryLogger struct {
closed bool
logs []interface{}
}
func NewFakeQueryLogger() *FakeQueryLogger {
return &FakeQueryLogger{
closed: false,
logs: make([]interface{}, 0),
}
}
func (f *FakeQueryLogger) Close() error {
f.closed = true
return nil
}
func (f *FakeQueryLogger) Log(l ...interface{}) error {
f.logs = append(f.logs, l...)
return nil
}
func TestQueryLogger_basic(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxSamples: 10,
Timeout: 10 * time.Second,
}
engine := NewEngine(opts)
queryExec := func() {
ctx, cancelCtx := context.WithCancel(context.Background())
defer cancelCtx()
query := engine.newTestQuery(func(ctx context.Context) error {
return contextDone(ctx, "test statement execution")
})
res := query.Exec(ctx)
require.NoError(t, res.Err)
}
// Query works without query log initialized.
queryExec()
f1 := NewFakeQueryLogger()
engine.SetQueryLogger(f1)
queryExec()
for i, field := range []interface{}{"params", map[string]interface{}{"query": "test statement"}} {
require.Equal(t, field, f1.logs[i])
}
l := len(f1.logs)
queryExec()
require.Equal(t, 2*l, len(f1.logs))
// Test that we close the query logger when unsetting it.
require.False(t, f1.closed, "expected f1 to be open, got closed")
engine.SetQueryLogger(nil)
require.True(t, f1.closed, "expected f1 to be closed, got open")
queryExec()
// Test that we close the query logger when swapping.
f2 := NewFakeQueryLogger()
f3 := NewFakeQueryLogger()
engine.SetQueryLogger(f2)
require.False(t, f2.closed, "expected f2 to be open, got closed")
queryExec()
engine.SetQueryLogger(f3)
require.True(t, f2.closed, "expected f2 to be closed, got open")
require.False(t, f3.closed, "expected f3 to be open, got closed")
queryExec()
}
func TestQueryLogger_fields(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxSamples: 10,
Timeout: 10 * time.Second,
}
engine := NewEngine(opts)
f1 := NewFakeQueryLogger()
engine.SetQueryLogger(f1)
ctx, cancelCtx := context.WithCancel(context.Background())
ctx = NewOriginContext(ctx, map[string]interface{}{"foo": "bar"})
defer cancelCtx()
query := engine.newTestQuery(func(ctx context.Context) error {
return contextDone(ctx, "test statement execution")
})
res := query.Exec(ctx)
require.NoError(t, res.Err)
expected := []string{"foo", "bar"}
for i, field := range expected {
v := f1.logs[len(f1.logs)-len(expected)+i].(string)
require.Equal(t, field, v)
}
}
func TestQueryLogger_error(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxSamples: 10,
Timeout: 10 * time.Second,
}
engine := NewEngine(opts)
f1 := NewFakeQueryLogger()
engine.SetQueryLogger(f1)
ctx, cancelCtx := context.WithCancel(context.Background())
ctx = NewOriginContext(ctx, map[string]interface{}{"foo": "bar"})
defer cancelCtx()
testErr := errors.New("failure")
query := engine.newTestQuery(func(ctx context.Context) error {
return testErr
})
res := query.Exec(ctx)
require.Error(t, res.Err, "query should have failed")
for i, field := range []interface{}{"params", map[string]interface{}{"query": "test statement"}, "error", testErr} {
require.Equal(t, f1.logs[i], field)
}
}