mirror of https://github.com/prometheus/prometheus
211 lines
5.0 KiB
Go
211 lines
5.0 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 retrieval
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import (
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"sort"
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"testing"
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"time"
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"github.com/prometheus/prometheus/utility/test"
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)
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func testTargetPool(t test.Tester) {
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type expectation struct {
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size int
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}
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type input struct {
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address string
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scheduledFor time.Time
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}
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type output struct {
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address string
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}
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var scenarios = []struct {
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name string
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inputs []input
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outputs []output
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}{
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{
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name: "empty",
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inputs: []input{},
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outputs: []output{},
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},
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{
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name: "single element",
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inputs: []input{
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{
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address: "http://single.com",
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},
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},
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outputs: []output{
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{
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address: "http://single.com",
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},
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},
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},
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{
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name: "plural descending schedules",
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inputs: []input{
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{
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address: "http://plural-descending.com",
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scheduledFor: time.Date(2013, 1, 4, 12, 0, 0, 0, time.UTC),
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},
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{
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address: "http://plural-descending.net",
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scheduledFor: time.Date(2013, 1, 4, 11, 0, 0, 0, time.UTC),
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},
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},
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outputs: []output{
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{
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address: "http://plural-descending.net",
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},
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{
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address: "http://plural-descending.com",
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},
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},
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},
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{
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name: "plural ascending schedules",
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inputs: []input{
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{
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address: "http://plural-ascending.net",
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scheduledFor: time.Date(2013, 1, 4, 11, 0, 0, 0, time.UTC),
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},
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{
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address: "http://plural-ascending.com",
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scheduledFor: time.Date(2013, 1, 4, 12, 0, 0, 0, time.UTC),
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},
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},
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outputs: []output{
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{
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address: "http://plural-ascending.net",
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},
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{
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address: "http://plural-ascending.com",
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},
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},
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},
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}
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for i, scenario := range scenarios {
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pool := TargetPool{}
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for _, input := range scenario.inputs {
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target := target{
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address: input.address,
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scheduler: literalScheduler(input.scheduledFor),
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}
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pool.addTarget(&target)
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}
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sort.Sort(pool.targets)
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if pool.targets.Len() != len(scenario.outputs) {
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t.Errorf("%s %d. expected TargetPool size to be %d but was %d", scenario.name, i, len(scenario.outputs), pool.targets.Len())
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} else {
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for j, output := range scenario.outputs {
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target := pool.targets[j]
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if target.Address() != output.address {
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t.Errorf("%s %d.%d. expected Target address to be %s but was %s", scenario.name, i, j, output.address, target.Address())
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}
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}
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if pool.targets.Len() != len(scenario.outputs) {
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t.Errorf("%s %d. expected to repopulated with %d elements, got %d", scenario.name, i, len(scenario.outputs), pool.targets.Len())
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}
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}
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}
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}
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func TestTargetPool(t *testing.T) {
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testTargetPool(t)
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}
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func TestTargetPoolIterationWithUnhealthyTargetsFinishes(t *testing.T) {
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pool := TargetPool{}
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target := &target{
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address: "http://example.com/metrics.json",
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scheduler: literalScheduler(time.Date(9999, 1, 1, 0, 0, 0, 0, time.UTC)),
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}
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pool.addTarget(target)
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done := make(chan bool)
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go func() {
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pool.runIteration(nopIngester{}, time.Duration(0))
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done <- true
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}()
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select {
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case <-done:
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break
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case <-time.After(time.Duration(1) * time.Second):
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t.Fatalf("Targetpool iteration is stuck")
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}
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}
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func TestTargetPoolReplaceTargets(t *testing.T) {
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pool := TargetPool{}
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oldTarget1 := &target{
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address: "http://example1.com/metrics.json",
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scheduler: literalScheduler(time.Date(9999, 1, 1, 0, 0, 0, 0, time.UTC)),
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state: UNREACHABLE,
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}
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oldTarget2 := &target{
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address: "http://example2.com/metrics.json",
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scheduler: literalScheduler(time.Date(7500, 1, 1, 0, 0, 0, 0, time.UTC)),
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state: UNREACHABLE,
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}
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newTarget1 := &target{
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address: "http://example1.com/metrics.json",
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scheduler: literalScheduler(time.Date(5000, 1, 1, 0, 0, 0, 0, time.UTC)),
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state: ALIVE,
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}
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newTarget2 := &target{
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address: "http://example3.com/metrics.json",
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scheduler: literalScheduler(time.Date(2500, 1, 1, 0, 0, 0, 0, time.UTC)),
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state: ALIVE,
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}
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pool.addTarget(oldTarget1)
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pool.addTarget(oldTarget2)
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pool.replaceTargets([]Target{newTarget1, newTarget2})
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sort.Sort(pool.targets)
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if pool.targets.Len() != 2 {
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t.Errorf("Expected 2 elements in pool, had %d", pool.targets.Len())
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}
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target1 := pool.targets[0].(*target)
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if target1.state != newTarget1.state {
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t.Errorf("Wrong first target returned from pool, expected %v, got %v", newTarget2, target1)
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}
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target2 := pool.targets[1].(*target)
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if target2.state != oldTarget1.state {
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t.Errorf("Wrong second target returned from pool, expected %v, got %v", oldTarget1, target2)
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}
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}
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func BenchmarkTargetPool(b *testing.B) {
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for i := 0; i < b.N; i++ {
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testTargetPool(b)
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}
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}
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