mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-28 06:59:40 -08:00
574 lines
18 KiB
Go
574 lines
18 KiB
Go
// Copyright 2013 Prometheus Team
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package rules
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import (
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"fmt"
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"path"
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"strings"
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"testing"
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"time"
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clientmodel "github.com/prometheus/client_golang/model"
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"github.com/prometheus/prometheus/rules/ast"
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"github.com/prometheus/prometheus/stats"
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"github.com/prometheus/prometheus/storage/metric"
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"github.com/prometheus/prometheus/utility/test"
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)
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var (
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testEvalTime = testStartTime.Add(testSampleInterval * 10)
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fixturesPath = "fixtures"
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)
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func annotateWithTime(lines []string, timestamp time.Time) []string {
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annotatedLines := []string{}
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for _, line := range lines {
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annotatedLines = append(annotatedLines, fmt.Sprintf(line, timestamp))
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}
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return annotatedLines
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}
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func vectorComparisonString(expected []string, actual []string) string {
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separator := "\n--------------\n"
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return fmt.Sprintf("Expected:%v%v%v\nActual:%v%v%v ",
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separator,
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strings.Join(expected, "\n"),
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separator,
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separator,
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strings.Join(actual, "\n"),
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separator)
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}
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type testTieredStorageCloser struct {
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storage *metric.TieredStorage
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directory test.Closer
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}
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func (t testTieredStorageCloser) Close() {
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t.storage.Close()
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t.directory.Close()
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}
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// This is copied from storage/metric/helpers_test.go, which is unfortunate but
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// presently required to make things work.
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func NewTestTieredStorage(t test.Tester) (storage *metric.TieredStorage, closer test.Closer) {
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var directory test.TemporaryDirectory
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directory = test.NewTemporaryDirectory("test_tiered_storage", t)
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storage, err := metric.NewTieredStorage(2500, 1000, 5*time.Second, 0*time.Second, directory.Path())
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if err != nil {
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if storage != nil {
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storage.Close()
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}
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directory.Close()
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t.Fatalf("Error creating storage: %s", err)
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}
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if storage == nil {
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directory.Close()
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t.Fatalf("storage == nil")
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}
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started := make(chan bool)
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go storage.Serve(started)
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<-started
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closer = &testTieredStorageCloser{
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storage: storage,
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directory: directory,
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}
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return
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}
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func newTestStorage(t test.Tester) (storage *metric.TieredStorage, closer test.Closer) {
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storage, closer = NewTestTieredStorage(t)
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if storage == nil {
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t.Fatal("storage == nil")
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}
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storeMatrix(*storage, testMatrix)
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return
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}
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func TestExpressions(t *testing.T) {
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// Labels in expected output need to be alphabetically sorted.
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var expressionTests = []struct {
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expr string
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output []string
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shouldFail bool
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checkOrder bool
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fullRanges int
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intervalRanges int
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}{
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{
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expr: `SUM(http_requests)`,
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output: []string{`http_requests => 3600 @[%v]`},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `SUM(http_requests) BY (job)`,
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output: []string{
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`http_requests{job="api-server"} => 1000 @[%v]`,
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`http_requests{job="app-server"} => 2600 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `COUNT(http_requests) BY (job)`,
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output: []string{
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`http_requests{job="api-server"} => 4 @[%v]`,
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`http_requests{job="app-server"} => 4 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `SUM(http_requests) BY (job, group)`,
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output: []string{
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`http_requests{group="canary", job="api-server"} => 700 @[%v]`,
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`http_requests{group="canary", job="app-server"} => 1500 @[%v]`,
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`http_requests{group="production", job="api-server"} => 300 @[%v]`,
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`http_requests{group="production", job="app-server"} => 1100 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `AVG(http_requests) BY (job)`,
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output: []string{
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`http_requests{job="api-server"} => 250 @[%v]`,
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`http_requests{job="app-server"} => 650 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `MIN(http_requests) BY (job)`,
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output: []string{
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`http_requests{job="api-server"} => 100 @[%v]`,
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`http_requests{job="app-server"} => 500 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `MAX(http_requests) BY (job)`,
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output: []string{
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`http_requests{job="api-server"} => 400 @[%v]`,
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`http_requests{job="app-server"} => 800 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `SUM(http_requests) BY (job) - COUNT(http_requests) BY (job)`,
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output: []string{
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`http_requests{job="api-server"} => 996 @[%v]`,
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`http_requests{job="app-server"} => 2596 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `SUM(http_requests) BY (job) - 2`,
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output: []string{
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`http_requests{job="api-server"} => 998 @[%v]`,
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`http_requests{job="app-server"} => 2598 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `SUM(http_requests) BY (job) % 3`,
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output: []string{
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`http_requests{job="api-server"} => 1 @[%v]`,
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`http_requests{job="app-server"} => 2 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `SUM(http_requests) BY (job) / 0`,
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output: []string{
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`http_requests{job="api-server"} => +Inf @[%v]`,
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`http_requests{job="app-server"} => +Inf @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `SUM(http_requests) BY (job) > 1000`,
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output: []string{
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`http_requests{job="app-server"} => 2600 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `SUM(http_requests) BY (job) <= 1000`,
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output: []string{
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`http_requests{job="api-server"} => 1000 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `SUM(http_requests) BY (job) != 1000`,
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output: []string{
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`http_requests{job="app-server"} => 2600 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `SUM(http_requests) BY (job) == 1000`,
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output: []string{
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`http_requests{job="api-server"} => 1000 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `SUM(http_requests) BY (job) + SUM(http_requests) BY (job)`,
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output: []string{
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`http_requests{job="api-server"} => 2000 @[%v]`,
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`http_requests{job="app-server"} => 5200 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `http_requests{job="api-server", group="canary"}`,
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output: []string{
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`http_requests{group="canary", instance="0", job="api-server"} => 300 @[%v]`,
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`http_requests{group="canary", instance="1", job="api-server"} => 400 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 2,
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}, {
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expr: `http_requests{job="api-server", group="canary"} + delta(http_requests{job="api-server"}[5m], 1)`,
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output: []string{
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`http_requests{group="canary", instance="0", job="api-server"} => 330 @[%v]`,
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`http_requests{group="canary", instance="1", job="api-server"} => 440 @[%v]`,
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},
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fullRanges: 4,
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intervalRanges: 0,
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}, {
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expr: `delta(http_requests[25m], 1)`,
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output: []string{
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`http_requests{group="canary", instance="0", job="api-server"} => 150 @[%v]`,
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`http_requests{group="canary", instance="0", job="app-server"} => 350 @[%v]`,
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`http_requests{group="canary", instance="1", job="api-server"} => 200 @[%v]`,
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`http_requests{group="canary", instance="1", job="app-server"} => 400 @[%v]`,
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`http_requests{group="production", instance="0", job="api-server"} => 50 @[%v]`,
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`http_requests{group="production", instance="0", job="app-server"} => 250 @[%v]`,
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`http_requests{group="production", instance="1", job="api-server"} => 100 @[%v]`,
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`http_requests{group="production", instance="1", job="app-server"} => 300 @[%v]`,
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},
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fullRanges: 8,
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intervalRanges: 0,
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}, {
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expr: `sort(http_requests)`,
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output: []string{
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`http_requests{group="production", instance="0", job="api-server"} => 100 @[%v]`,
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`http_requests{group="production", instance="1", job="api-server"} => 200 @[%v]`,
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`http_requests{group="canary", instance="0", job="api-server"} => 300 @[%v]`,
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`http_requests{group="canary", instance="1", job="api-server"} => 400 @[%v]`,
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`http_requests{group="production", instance="0", job="app-server"} => 500 @[%v]`,
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`http_requests{group="production", instance="1", job="app-server"} => 600 @[%v]`,
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`http_requests{group="canary", instance="0", job="app-server"} => 700 @[%v]`,
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`http_requests{group="canary", instance="1", job="app-server"} => 800 @[%v]`,
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},
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checkOrder: true,
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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expr: `sort_desc(http_requests)`,
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output: []string{
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`http_requests{group="canary", instance="1", job="app-server"} => 800 @[%v]`,
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`http_requests{group="canary", instance="0", job="app-server"} => 700 @[%v]`,
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`http_requests{group="production", instance="1", job="app-server"} => 600 @[%v]`,
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`http_requests{group="production", instance="0", job="app-server"} => 500 @[%v]`,
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`http_requests{group="canary", instance="1", job="api-server"} => 400 @[%v]`,
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`http_requests{group="canary", instance="0", job="api-server"} => 300 @[%v]`,
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`http_requests{group="production", instance="1", job="api-server"} => 200 @[%v]`,
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`http_requests{group="production", instance="0", job="api-server"} => 100 @[%v]`,
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},
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checkOrder: true,
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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// Single-letter label names and values.
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expr: `x{y="testvalue"}`,
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output: []string{
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`x{y="testvalue"} => 100 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 1,
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}, {
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// Lower-cased aggregation operators should work too.
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expr: `sum(http_requests) by (job) + min(http_requests) by (job) + max(http_requests) by (job) + avg(http_requests) by (job)`,
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output: []string{
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`http_requests{job="app-server"} => 4550 @[%v]`,
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`http_requests{job="api-server"} => 1750 @[%v]`,
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},
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fullRanges: 0,
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intervalRanges: 8,
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}, {
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// Deltas should be adjusted for target interval vs. samples under target interval.
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expr: `delta(http_requests{group="canary", instance="1", job="app-server"}[18m], 1)`,
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output: []string{`http_requests{group="canary", instance="1", job="app-server"} => 288 @[%v]`},
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fullRanges: 1,
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intervalRanges: 0,
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}, {
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// Rates should transform per-interval deltas to per-second rates.
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expr: `rate(http_requests{group="canary", instance="1", job="app-server"}[10m])`,
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output: []string{`http_requests{group="canary", instance="1", job="app-server"} => 0.26666666666666666 @[%v]`},
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fullRanges: 1,
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intervalRanges: 0,
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}, {
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// Counter resets in middle of range are ignored by delta() if counter == 1.
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expr: `delta(testcounter_reset_middle[50m], 1)`,
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output: []string{`testcounter_reset_middle => 90 @[%v]`},
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fullRanges: 1,
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intervalRanges: 0,
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}, {
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// Counter resets in middle of range are not ignored by delta() if counter == 0.
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expr: `delta(testcounter_reset_middle[50m], 0)`,
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output: []string{`testcounter_reset_middle => 50 @[%v]`},
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fullRanges: 1,
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intervalRanges: 0,
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}, {
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// Counter resets at end of range are ignored by delta() if counter == 1.
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expr: `delta(testcounter_reset_end[5m], 1)`,
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output: []string{`testcounter_reset_end => 0 @[%v]`},
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fullRanges: 1,
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intervalRanges: 0,
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}, {
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// Counter resets at end of range are not ignored by delta() if counter == 0.
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expr: `delta(testcounter_reset_end[5m], 0)`,
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output: []string{`testcounter_reset_end => -90 @[%v]`},
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fullRanges: 1,
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intervalRanges: 0,
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}, {
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// Empty expressions shouldn"t parse.
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expr: ``,
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shouldFail: true,
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}, {
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// Subtracting a vector from a scalar is not supported.
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expr: `1 - http_requests`,
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shouldFail: true,
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}, {
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// Interval durations can"t be in quotes.
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expr: `http_requests["1m"]`,
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shouldFail: true,
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},
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}
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tieredStorage, closer := newTestStorage(t)
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defer closer.Close()
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tieredStorage.Flush()
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for i, exprTest := range expressionTests {
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expectedLines := annotateWithTime(exprTest.output, testEvalTime)
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testExpr, err := LoadExprFromString(exprTest.expr)
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if err != nil {
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if exprTest.shouldFail {
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continue
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}
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t.Errorf("%d. Error during parsing: %v", i, err)
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t.Errorf("%d. Expression: %v", i, exprTest.expr)
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} else {
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if exprTest.shouldFail {
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t.Errorf("%d. Test should fail, but didn't", i)
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}
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failed := false
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resultStr := ast.EvalToString(testExpr, testEvalTime, ast.TEXT, tieredStorage, stats.NewTimerGroup())
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resultLines := strings.Split(resultStr, "\n")
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if len(exprTest.output) != len(resultLines) {
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t.Errorf("%d. Number of samples in expected and actual output don't match", i)
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failed = true
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}
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if exprTest.checkOrder {
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for j, expectedSample := range expectedLines {
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if resultLines[j] != expectedSample {
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t.Errorf("%d.%d. Expected sample '%v', got '%v'", i, j, resultLines[j], expectedSample)
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failed = true
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}
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}
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} else {
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for j, expectedSample := range expectedLines {
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found := false
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for _, actualSample := range resultLines {
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if actualSample == expectedSample {
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found = true
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}
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}
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if !found {
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t.Errorf("%d.%d. Couldn't find expected sample in output: '%v'", i, j, expectedSample)
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failed = true
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}
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}
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}
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analyzer := ast.NewQueryAnalyzer(tieredStorage)
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analyzer.AnalyzeQueries(testExpr)
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if exprTest.fullRanges != len(analyzer.FullRanges) {
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t.Errorf("%d. Count of full ranges didn't match: %v vs %v", i, exprTest.fullRanges, len(analyzer.FullRanges))
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failed = true
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}
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if exprTest.intervalRanges != len(analyzer.IntervalRanges) {
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t.Errorf("%d. Count of interval ranges didn't match: %v vs %v", i, exprTest.intervalRanges, len(analyzer.IntervalRanges))
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failed = true
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}
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if failed {
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t.Errorf("%d. Expression: %v\n%v", i, exprTest.expr, vectorComparisonString(expectedLines, resultLines))
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}
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}
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}
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}
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var ruleTests = []struct {
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inputFile string
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shouldFail bool
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errContains string
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numRecordingRules int
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numAlertingRules int
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}{
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{
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inputFile: "empty.rules",
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numRecordingRules: 0,
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numAlertingRules: 0,
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}, {
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inputFile: "mixed.rules",
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numRecordingRules: 2,
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numAlertingRules: 2,
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},
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{
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inputFile: "syntax_error.rules",
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shouldFail: true,
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errContains: "Error parsing rules at line 3",
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},
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{
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inputFile: "non_vector.rules",
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shouldFail: true,
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errContains: "does not evaluate to vector type",
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},
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}
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|
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func TestRules(t *testing.T) {
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for i, ruleTest := range ruleTests {
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testRules, err := LoadRulesFromFile(path.Join(fixturesPath, ruleTest.inputFile))
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if err != nil {
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if !ruleTest.shouldFail {
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t.Fatalf("%d. Error parsing rules file %v: %v", i, ruleTest.inputFile, err)
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} else {
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if !strings.Contains(err.Error(), ruleTest.errContains) {
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t.Fatalf("%d. Expected error containing '%v', got: %v", i, ruleTest.errContains, err)
|
|
}
|
|
}
|
|
} else {
|
|
numRecordingRules := 0
|
|
numAlertingRules := 0
|
|
|
|
for j, rule := range testRules {
|
|
switch rule.(type) {
|
|
case *RecordingRule:
|
|
numRecordingRules++
|
|
case *AlertingRule:
|
|
numAlertingRules++
|
|
default:
|
|
t.Fatalf("%d.%d. Unknown rule type!", i, j)
|
|
}
|
|
}
|
|
|
|
if numRecordingRules != ruleTest.numRecordingRules {
|
|
t.Fatalf("%d. Expected %d recording rules, got %d", i, ruleTest.numRecordingRules, numRecordingRules)
|
|
}
|
|
if numAlertingRules != ruleTest.numAlertingRules {
|
|
t.Fatalf("%d. Expected %d alerting rules, got %d", i, ruleTest.numAlertingRules, numAlertingRules)
|
|
}
|
|
|
|
// TODO(julius): add more complex checks on the parsed rules here.
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestAlertingRule(t *testing.T) {
|
|
// Labels in expected output need to be alphabetically sorted.
|
|
var evalOutputs = [][]string{
|
|
{
|
|
`ALERTS{alertname="HttpRequestRateLow", alertstate="pending", group="canary", instance="0", job="app-server"} => 1 @[%v]`,
|
|
`ALERTS{alertname="HttpRequestRateLow", alertstate="pending", group="canary", instance="1", job="app-server"} => 1 @[%v]`,
|
|
},
|
|
{
|
|
`ALERTS{alertname="HttpRequestRateLow", alertstate="pending", group="canary", instance="0", job="app-server"} => 0 @[%v]`,
|
|
`ALERTS{alertname="HttpRequestRateLow", alertstate="firing", group="canary", instance="0", job="app-server"} => 1 @[%v]`,
|
|
`ALERTS{alertname="HttpRequestRateLow", alertstate="pending", group="canary", instance="1", job="app-server"} => 0 @[%v]`,
|
|
`ALERTS{alertname="HttpRequestRateLow", alertstate="firing", group="canary", instance="1", job="app-server"} => 1 @[%v]`,
|
|
},
|
|
{
|
|
`ALERTS{alertname="HttpRequestRateLow", alertstate="firing", group="canary", instance="1", job="app-server"} => 0 @[%v]`,
|
|
`ALERTS{alertname="HttpRequestRateLow", alertstate="firing", group="canary", instance="0", job="app-server"} => 0 @[%v]`,
|
|
},
|
|
{
|
|
/* empty */
|
|
},
|
|
{
|
|
/* empty */
|
|
},
|
|
}
|
|
|
|
tieredStorage, closer := newTestStorage(t)
|
|
defer closer.Close()
|
|
tieredStorage.Flush()
|
|
|
|
alertExpr, err := LoadExprFromString(`http_requests{group="canary", job="app-server"} < 100`)
|
|
if err != nil {
|
|
t.Fatalf("Unable to parse alert expression: %s", err)
|
|
}
|
|
alertName := "HttpRequestRateLow"
|
|
alertLabels := clientmodel.LabelSet{
|
|
"summary": "HTTP request rate is low",
|
|
}
|
|
rule := NewAlertingRule(alertName, alertExpr.(ast.VectorNode), time.Minute, alertLabels)
|
|
|
|
for i, expected := range evalOutputs {
|
|
evalTime := testStartTime.Add(testSampleInterval * time.Duration(i))
|
|
actual, err := rule.Eval(evalTime, tieredStorage)
|
|
if err != nil {
|
|
t.Fatalf("Error during alerting rule evaluation: %s", err)
|
|
}
|
|
actualLines := strings.Split(actual.String(), "\n")
|
|
expectedLines := annotateWithTime(expected, evalTime)
|
|
if actualLines[0] == "" {
|
|
actualLines = []string{}
|
|
}
|
|
|
|
failed := false
|
|
if len(actualLines) != len(expectedLines) {
|
|
t.Errorf("%d. Number of samples in expected and actual output don't match (%d vs. %d)", i, len(expectedLines), len(actualLines))
|
|
failed = true
|
|
}
|
|
|
|
for j, expectedSample := range expectedLines {
|
|
found := false
|
|
for _, actualSample := range actualLines {
|
|
if actualSample == expectedSample {
|
|
found = true
|
|
}
|
|
}
|
|
if !found {
|
|
t.Errorf("%d.%d. Couldn't find expected sample in output: '%v'", i, j, expectedSample)
|
|
failed = true
|
|
}
|
|
}
|
|
|
|
if failed {
|
|
t.Fatalf("%d. Expected and actual outputs don't match:\n%v", i, vectorComparisonString(expectedLines, actualLines))
|
|
}
|
|
}
|
|
}
|