289 lines
8.5 KiB
Go
289 lines
8.5 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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"github.com/prometheus/prometheus/rules/ast"
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"github.com/prometheus/prometheus/storage/metric"
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"github.com/prometheus/prometheus/utility/test"
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"strings"
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"testing"
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"time"
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)
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var testEvalTime = testStartTime.Add(testDuration5m * 10)
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// Expected output needs to be alphabetically sorted (labels within one line
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// must be sorted and lines between each other must be sorted too).
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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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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: "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)",
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output: []string{
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"http_requests{job='api-server'} => 992 @[%v]",
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"http_requests{job='app-server'} => 2592 @[%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: "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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// Invalid expressions that should fail to parse.
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}, {
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expr: "",
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shouldFail: true,
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}, {
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expr: "1 - http_requests",
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shouldFail: true,
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}, {
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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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func annotateWithTime(lines []string) []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, testEvalTime))
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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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func TestExpressions(t *testing.T) {
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temporaryDirectory := test.NewTemporaryDirectory("rule_expression_tests", t)
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defer temporaryDirectory.Close()
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tieredStorage, err := metric.NewTieredStorage(5000, 5000, 100, time.Second*30, time.Second*1, time.Second*20, temporaryDirectory.Path())
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if err != nil {
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t.Fatalf("Error opening storage: %s", err)
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}
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go tieredStorage.Serve()
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ast.SetStorage(tieredStorage)
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storeMatrix(tieredStorage, testMatrix)
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tieredStorage.Flush()
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for _, exprTest := range expressionTests {
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expectedLines := annotateWithTime(exprTest.output)
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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("Error during parsing: %v", err)
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t.Errorf("Expression: %v", exprTest.expr)
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} else {
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if exprTest.shouldFail {
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t.Errorf("Test should fail, but didn't")
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}
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failed := false
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resultStr := ast.EvalToString(testExpr, testEvalTime, ast.TEXT)
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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("Number of samples in expected and actual output don't match")
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failed = true
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}
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for _, 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("Couldn't find expected sample in output: '%v'",
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expectedSample)
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failed = true
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}
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}
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analyzer := ast.NewQueryAnalyzer()
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analyzer.AnalyzeQueries(testExpr)
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if exprTest.fullRanges != len(analyzer.FullRanges) {
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t.Errorf("Count of full ranges didn't match: %v vs %v", 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("Count of stepped ranges didn't match: %v vs %v", 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("Expression: %v\n%v", 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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