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prometheus/discovery/discovery_test.go
Bora Tunca 493fd6bd1f Fix race in test
2017-11-13 11:47:59 -05:00

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// 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 discovery
import (
"context"
"reflect"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/config"
yaml "gopkg.in/yaml.v2"
)
func TestTargetSetThrottlesTheSyncCalls(t *testing.T) {
testCases := []struct {
title string
updates map[string][]update
expectedSyncCalls [][]string
}{
{
title: "Single TP no updates",
updates: map[string][]update{
"tp1": {},
},
expectedSyncCalls: [][]string{
{},
},
},
{
title: "Multips TPs no updates",
updates: map[string][]update{
"tp1": {},
"tp2": {},
"tp3": {},
},
expectedSyncCalls: [][]string{
{},
},
},
{
title: "Single TP empty initials",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{},
interval: 5,
},
},
},
expectedSyncCalls: [][]string{
{},
},
},
{
title: "Multiple TPs empty initials",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{},
interval: 5,
},
},
"tp2": {
{
targetGroups: []config.TargetGroup{},
interval: 500,
},
},
"tp3": {
{
targetGroups: []config.TargetGroup{},
interval: 100,
},
},
},
expectedSyncCalls: [][]string{
{},
},
},
{
title: "Multiple TPs empty initials with a delay",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{},
interval: 6000,
},
},
"tp2": {
{
targetGroups: []config.TargetGroup{},
interval: 6500,
},
},
},
expectedSyncCalls: [][]string{
{},
},
},
{
title: "Single TP initials only",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{{Source: "initial1"}, {Source: "initial2"}},
interval: 0,
},
},
},
expectedSyncCalls: [][]string{
{"initial1", "initial2"},
},
},
{
title: "Multiple TPs initials only",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{{Source: "tp1-initial1"}, {Source: "tp1-initial2"}},
interval: 0,
},
},
"tp2": {
{
targetGroups: []config.TargetGroup{{Source: "tp2-initial1"}},
interval: 0,
},
},
},
expectedSyncCalls: [][]string{
{"tp1-initial1", "tp1-initial2", "tp2-initial1"},
},
},
{
title: "Single TP delayed initials only",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{{Source: "initial1"}, {Source: "initial2"}},
interval: 6000,
},
},
},
expectedSyncCalls: [][]string{
{},
{"initial1", "initial2"},
},
},
{
title: "Multiple TPs with some delayed initials",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{{Source: "tp1-initial1"}, {Source: "tp1-initial2"}},
interval: 100,
},
},
"tp2": {
{
targetGroups: []config.TargetGroup{{Source: "tp2-initial1"}, {Source: "tp2-initial2"}, {Source: "tp2-initial3"}},
interval: 6000,
},
},
},
expectedSyncCalls: [][]string{
{"tp1-initial1", "tp1-initial2"},
{"tp1-initial1", "tp1-initial2", "tp2-initial1", "tp2-initial2", "tp2-initial3"},
},
},
{
title: "Single TP initials followed by empty updates",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{{Source: "initial1"}, {Source: "initial2"}},
interval: 0,
},
{
targetGroups: []config.TargetGroup{},
interval: 10,
},
},
},
expectedSyncCalls: [][]string{
{"initial1", "initial2"},
},
},
{
title: "Single TP initials and new groups",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{{Source: "initial1"}, {Source: "initial2"}},
interval: 0,
},
{
targetGroups: []config.TargetGroup{{Source: "update1"}, {Source: "update2"}},
interval: 10,
},
},
},
expectedSyncCalls: [][]string{
{"initial1", "initial2"},
{"initial1", "initial2", "update1", "update2"},
},
},
{
title: "Multiple TPs initials and new groups",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{{Source: "tp1-initial1"}, {Source: "tp1-initial2"}},
interval: 10,
},
{
targetGroups: []config.TargetGroup{{Source: "tp1-update1"}, {Source: "tp1-update2"}},
interval: 1500,
},
},
"tp2": {
{
targetGroups: []config.TargetGroup{{Source: "tp2-initial1"}, {Source: "tp2-initial2"}},
interval: 100,
},
{
targetGroups: []config.TargetGroup{{Source: "tp2-update1"}, {Source: "tp2-update2"}},
interval: 10,
},
},
},
expectedSyncCalls: [][]string{
{"tp1-initial1", "tp1-initial2", "tp2-initial1", "tp2-initial2"},
{"tp1-initial1", "tp1-initial2", "tp2-initial1", "tp2-initial2", "tp1-update1", "tp1-update2", "tp2-update1", "tp2-update2"},
},
},
{
title: "One tp initials arrive after other tp updates but still within 5 seconds",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{{Source: "tp1-initial1"}, {Source: "tp1-initial2"}},
interval: 10,
},
{
targetGroups: []config.TargetGroup{{Source: "tp1-update1"}, {Source: "tp1-update2"}},
interval: 1500,
},
},
"tp2": {
{
targetGroups: []config.TargetGroup{{Source: "tp2-initial1"}, {Source: "tp2-initial2"}},
interval: 2000,
},
{
targetGroups: []config.TargetGroup{{Source: "tp2-update1"}, {Source: "tp2-update2"}},
interval: 1000,
},
},
},
expectedSyncCalls: [][]string{
{"tp1-initial1", "tp1-initial2", "tp1-update1", "tp1-update2", "tp2-initial1", "tp2-initial2"},
{"tp1-initial1", "tp1-initial2", "tp1-update1", "tp1-update2", "tp2-initial1", "tp2-initial2", "tp2-update1", "tp2-update2"},
},
},
{
title: "One tp initials arrive after other tp updates and after 5 seconds",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{{Source: "tp1-initial1"}, {Source: "tp1-initial2"}},
interval: 10,
},
{
targetGroups: []config.TargetGroup{{Source: "tp1-update1"}, {Source: "tp1-update2"}},
interval: 1500,
},
{
targetGroups: []config.TargetGroup{{Source: "tp1-update3"}},
interval: 5000,
},
},
"tp2": {
{
targetGroups: []config.TargetGroup{{Source: "tp2-initial1"}, {Source: "tp2-initial2"}},
interval: 6000,
},
},
},
expectedSyncCalls: [][]string{
{"tp1-initial1", "tp1-initial2", "tp1-update1", "tp1-update2"},
{"tp1-initial1", "tp1-initial2", "tp1-update1", "tp1-update2", "tp2-initial1", "tp2-initial2", "tp1-update3"},
},
},
{
title: "Single TP initials and new groups after a delay",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{{Source: "initial1"}, {Source: "initial2"}},
interval: 6000,
},
{
targetGroups: []config.TargetGroup{{Source: "update1"}, {Source: "update2"}},
interval: 10,
},
},
},
expectedSyncCalls: [][]string{
{},
{"initial1", "initial2", "update1", "update2"},
},
},
{
title: "Single TP initial and successive updates",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{{Source: "initial1"}},
interval: 100,
},
{
targetGroups: []config.TargetGroup{{Source: "update1"}},
interval: 100,
},
{
targetGroups: []config.TargetGroup{{Source: "update2"}},
interval: 10,
},
{
targetGroups: []config.TargetGroup{{Source: "update3"}},
interval: 10,
},
},
},
expectedSyncCalls: [][]string{
{"initial1"},
{"initial1", "update1", "update2", "update3"},
},
},
{
title: "Multiple TPs initials and successive updates",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{{Source: "tp1-initial1"}},
interval: 1000,
},
{
targetGroups: []config.TargetGroup{{Source: "tp1-update1"}},
interval: 1000,
},
{
targetGroups: []config.TargetGroup{{Source: "tp1-update2"}},
interval: 2000,
},
{
targetGroups: []config.TargetGroup{{Source: "tp1-update3"}},
interval: 2000,
},
},
"tp2": {
{
targetGroups: []config.TargetGroup{{Source: "tp2-initial1"}},
interval: 3000,
},
{
targetGroups: []config.TargetGroup{{Source: "tp2-update1"}},
interval: 1000,
},
{
targetGroups: []config.TargetGroup{{Source: "tp2-update2"}},
interval: 3000,
},
{
targetGroups: []config.TargetGroup{{Source: "tp2-update3"}},
interval: 2000,
},
},
},
expectedSyncCalls: [][]string{
{"tp1-initial1", "tp1-update1", "tp2-initial1"},
{"tp1-initial1", "tp1-update1", "tp2-initial1", "tp1-update2", "tp1-update3", "tp2-update1", "tp2-update2"},
{"tp1-initial1", "tp1-update1", "tp2-initial1", "tp1-update2", "tp1-update3", "tp2-update1", "tp2-update2", "tp2-update3"},
},
},
{
title: "Single TP Multiple updates 5 second window",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{{Source: "initial1"}},
interval: 10,
},
{
targetGroups: []config.TargetGroup{{Source: "update1"}},
interval: 25,
},
{
targetGroups: []config.TargetGroup{{Source: "update2"}, {Source: "update3"}, {Source: "update4"}},
interval: 10,
},
{
targetGroups: []config.TargetGroup{{Source: "update5"}},
interval: 0,
},
{
targetGroups: []config.TargetGroup{{Source: "update6"}, {Source: "update7"}, {Source: "update8"}},
interval: 70,
},
},
},
expectedSyncCalls: [][]string{
{"initial1"},
{"initial1", "update1", "update2", "update3", "update4", "update5", "update6", "update7", "update8"},
},
},
{
title: "Single TP Single provider empty update in between",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{{Source: "initial1"}, {Source: "initial2"}},
interval: 30,
},
{
targetGroups: []config.TargetGroup{{Source: "update1"}, {Source: "update2"}},
interval: 300,
},
{
targetGroups: []config.TargetGroup{},
interval: 10,
},
{
targetGroups: []config.TargetGroup{{Source: "update3"}, {Source: "update4"}, {Source: "update5"}, {Source: "update6"}},
interval: 6000,
},
},
},
expectedSyncCalls: [][]string{
{"initial1", "initial2"},
{"initial1", "initial2", "update1", "update2"},
{"initial1", "initial2", "update1", "update2", "update3", "update4", "update5", "update6"},
},
},
}
for i, testCase := range testCases {
finalize := make(chan bool)
syncCallCount := 0
syncedGroups := make([][]string, 0)
targetSet := NewTargetSet(&mockSyncer{
sync: func(tgs []*config.TargetGroup) {
currentCallGroup := make([]string, len(tgs))
for i, tg := range tgs {
currentCallGroup[i] = tg.Source
}
syncedGroups = append(syncedGroups, currentCallGroup)
syncCallCount++
if syncCallCount == len(testCase.expectedSyncCalls) {
// All the groups are sent, we can start asserting.
close(finalize)
}
},
})
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
targetProviders := map[string]TargetProvider{}
for tpName, tpUpdates := range testCase.updates {
tp := newMockTargetProvider(tpUpdates)
targetProviders[tpName] = tp
}
go targetSet.Run(ctx)
targetSet.UpdateProviders(targetProviders)
select {
case <-time.After(20 * time.Second):
t.Errorf("%d. %q: Test timed out after 20 seconds. All targets should be sent within the timeout", i, testCase.title)
case <-finalize:
for name, tp := range targetProviders {
runCallCount := tp.(mockTargetProvider).callCount()
if runCallCount != 1 {
t.Errorf("%d. %q: TargetProvider Run should be called once for each target provider. For %q was called %d times", i, testCase.title, name, runCallCount)
}
}
if len(syncedGroups) != len(testCase.expectedSyncCalls) {
t.Errorf("%d. %q: received sync calls: \n %v \n do not match expected calls: \n %v \n", i, testCase.title, syncedGroups, testCase.expectedSyncCalls)
}
for j := range syncedGroups {
if len(syncedGroups[j]) != len(testCase.expectedSyncCalls[j]) {
t.Errorf("%d. %q: received sync calls in call [%v]: \n %v \n do not match expected calls: \n %v \n", i, testCase.title, j, syncedGroups[j], testCase.expectedSyncCalls[j])
}
expectedGroupsMap := make(map[string]struct{})
for _, expectedGroup := range testCase.expectedSyncCalls[j] {
expectedGroupsMap[expectedGroup] = struct{}{}
}
for _, syncedGroup := range syncedGroups[j] {
if _, ok := expectedGroupsMap[syncedGroup]; !ok {
t.Errorf("%d. %q: '%s' does not exist in expected target groups: %s", i, testCase.title, syncedGroup, testCase.expectedSyncCalls[j])
} else {
delete(expectedGroupsMap, syncedGroup) // Remove used targets from the map.
}
}
}
}
}
}
func TestTargetSetConsolidatesToTheLatestState(t *testing.T) {
testCases := []struct {
title string
updates map[string][]update
}{
{
title: "Single TP update same initial group multiple times",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{
{
Source: "initial1",
Targets: []model.LabelSet{{"__instance__": "10.11.122.11:6003"}},
},
},
interval: 100,
},
{
targetGroups: []config.TargetGroup{
{
Source: "initial1",
Targets: []model.LabelSet{{"__instance__": "10.11.122.11:6003"}, {"__instance__": "10.11.122.12:6003"}},
},
},
interval: 250,
},
{
targetGroups: []config.TargetGroup{
{
Source: "initial1",
Targets: []model.LabelSet{{"__instance__": "10.11.122.12:6003"}},
},
},
interval: 250,
},
},
},
},
{
title: "Multiple TPs update",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{
{
Source: "tp1-initial1",
Targets: []model.LabelSet{{"__instance__": "10.11.122.11:6003"}},
},
},
interval: 3,
},
{
targetGroups: []config.TargetGroup{
{
Source: "tp1-update1",
Targets: []model.LabelSet{{"__instance__": "10.11.122.12:6003"}},
},
},
interval: 10,
},
{
targetGroups: []config.TargetGroup{
{
Source: "tp1-update1",
Targets: []model.LabelSet{
{"__instance__": "10.11.122.12:6003"},
{"__instance__": "10.11.122.13:6003"},
{"__instance__": "10.11.122.14:6003"},
},
},
},
interval: 10,
},
},
"tp2": {
{
targetGroups: []config.TargetGroup{
{
Source: "tp2-initial1",
Targets: []model.LabelSet{{"__instance__": "10.11.122.11:6003"}},
},
},
interval: 3,
},
{
targetGroups: []config.TargetGroup{
{
Source: "tp2-initial1",
Targets: []model.LabelSet{{"__instance__": "10.11.122.12:6003"}},
},
},
interval: 10,
},
{
targetGroups: []config.TargetGroup{
{
Source: "tp2-update1",
Targets: []model.LabelSet{
{"__instance__": "10.11.122.12:6003"},
{"__instance__": "10.11.122.13:6003"},
{"__instance__": "10.11.122.14:6003"},
},
},
},
interval: 10,
},
},
},
},
{
title: "Multiple TPs update II",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{
{
Source: "tp1-initial1",
Targets: []model.LabelSet{{"__instance__": "10.11.122.11:6003"}},
},
{
Source: "tp1-initial2",
Targets: []model.LabelSet{{"__instance__": "10.11.122.12:6003"}},
},
},
interval: 100,
},
{
targetGroups: []config.TargetGroup{
{
Source: "tp1-update1",
Targets: []model.LabelSet{{"__instance__": "10.11.122.13:6003"}},
},
{
Source: "tp1-initial2",
Targets: []model.LabelSet{
{"__instance__": "10.11.122.12:6003"},
{"__instance__": "10.11.122.14:6003"},
},
},
},
interval: 100,
},
{
targetGroups: []config.TargetGroup{
{
Source: "tp1-update2",
Targets: []model.LabelSet{{"__instance__": "10.11.122.15:6003"}},
},
{
Source: "tp1-initial1",
Targets: []model.LabelSet{},
},
},
interval: 100,
},
{
targetGroups: []config.TargetGroup{
{
Source: "tp1-update1",
Targets: []model.LabelSet{
{"__instance__": "10.11.122.16:6003"},
{"__instance__": "10.11.122.17:6003"},
{"__instance__": "10.11.122.18:6003"},
},
},
},
interval: 100,
},
},
"tp2": {
{
targetGroups: []config.TargetGroup{},
interval: 100,
},
{
targetGroups: []config.TargetGroup{
{
Source: "tp2-update1",
Targets: []model.LabelSet{{"__instance__": "10.11.122.13:6003"}},
},
},
interval: 100,
},
{
targetGroups: []config.TargetGroup{
{
Source: "tp2-update2",
Targets: []model.LabelSet{{"__instance__": "10.11.122.15:6003"}},
},
{
Source: "tp2-update1",
Targets: []model.LabelSet{},
},
},
interval: 300,
},
},
},
},
{
title: "Three rounds of sync call",
updates: map[string][]update{
"tp1": {
{
targetGroups: []config.TargetGroup{
{
Source: "tp1-initial1",
Targets: []model.LabelSet{
{"__instance__": "10.11.122.11:6003"},
{"__instance__": "10.11.122.12:6003"},
{"__instance__": "10.11.122.13:6003"},
},
},
{
Source: "tp1-initial2",
Targets: []model.LabelSet{{"__instance__": "10.11.122.14:6003"}},
},
},
interval: 1000,
},
{
targetGroups: []config.TargetGroup{
{
Source: "tp1-initial1",
Targets: []model.LabelSet{{"__instance__": "10.11.122.12:6003"}},
},
{
Source: "tp1-update1",
Targets: []model.LabelSet{{"__instance__": "10.11.122.15:6003"}},
},
},
interval: 3000,
},
{
targetGroups: []config.TargetGroup{
{
Source: "tp1-initial1",
Targets: []model.LabelSet{},
},
{
Source: "tp1-update1",
Targets: []model.LabelSet{
{"__instance__": "10.11.122.15:6003"},
{"__instance__": "10.11.122.16:6003"},
},
},
},
interval: 3000,
},
},
"tp2": {
{
targetGroups: []config.TargetGroup{
{
Source: "tp2-initial1",
Targets: []model.LabelSet{
{"__instance__": "10.11.122.11:6003"},
},
},
{
Source: "tp2-initial2",
Targets: []model.LabelSet{{"__instance__": "10.11.122.14:6003"}},
},
{
Source: "tp2-initial3",
Targets: []model.LabelSet{{"__instance__": "10.11.122.15:6003"}},
},
},
interval: 6000,
},
{
targetGroups: []config.TargetGroup{
{
Source: "tp2-initial1",
Targets: []model.LabelSet{{"__instance__": "10.11.122.11:6003"}, {"__instance__": "10.11.122.12:6003"}},
},
{
Source: "tp2-update1",
Targets: []model.LabelSet{{"__instance__": "10.11.122.15:6003"}},
},
},
interval: 3000,
},
},
},
},
}
// Function to determine if the sync call received the latest state of
// all the target groups that came out of the target provider.
endStateAchieved := func(groupsSentToSyc []*config.TargetGroup, endState map[string]config.TargetGroup) bool {
if len(groupsSentToSyc) != len(endState) {
return false
}
for _, tg := range groupsSentToSyc {
if _, ok := endState[tg.Source]; ok == false {
// The target group does not exist in the end state.
return false
}
if reflect.DeepEqual(endState[tg.Source], *tg) == false {
// The target group has not reached its final state yet.
return false
}
delete(endState, tg.Source) // Remove used target groups.
}
return true
}
for i, testCase := range testCases {
expectedGroups := make(map[string]config.TargetGroup)
for _, tpUpdates := range testCase.updates {
for _, update := range tpUpdates {
for _, targetGroup := range update.targetGroups {
expectedGroups[targetGroup.Source] = targetGroup
}
}
}
finalize := make(chan bool)
targetSet := NewTargetSet(&mockSyncer{
sync: func(tgs []*config.TargetGroup) {
endState := make(map[string]config.TargetGroup)
for k, v := range expectedGroups {
endState[k] = v
}
if endStateAchieved(tgs, endState) == false {
return
}
close(finalize)
},
})
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
targetProviders := map[string]TargetProvider{}
for tpName, tpUpdates := range testCase.updates {
tp := newMockTargetProvider(tpUpdates)
targetProviders[tpName] = tp
}
go targetSet.Run(ctx)
targetSet.UpdateProviders(targetProviders)
select {
case <-time.After(20 * time.Second):
t.Errorf("%d. %q: Test timed out after 20 seconds. All targets should be sent within the timeout", i, testCase.title)
case <-finalize:
// System successfully reached to the end state.
}
}
}
func TestTargetSetRecreatesTargetGroupsEveryRun(t *testing.T) {
verifyPresence := func(tgroups map[string]*config.TargetGroup, name string, present bool) {
if _, ok := tgroups[name]; ok != present {
msg := ""
if !present {
msg = "not "
}
t.Fatalf("'%s' should %sbe present in TargetSet.tgroups: %s", name, msg, tgroups)
}
}
cfg := &config.ServiceDiscoveryConfig{}
sOne := `
static_configs:
- targets: ["foo:9090"]
- targets: ["bar:9090"]
`
if err := yaml.Unmarshal([]byte(sOne), cfg); err != nil {
t.Fatalf("Unable to load YAML config sOne: %s", err)
}
called := make(chan struct{})
ts := NewTargetSet(&mockSyncer{
sync: func([]*config.TargetGroup) { called <- struct{}{} },
})
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
go ts.Run(ctx)
ts.UpdateProviders(ProvidersFromConfig(*cfg, nil))
<-called
verifyPresence(ts.tgroups, "static/0/0", true)
verifyPresence(ts.tgroups, "static/0/1", true)
sTwo := `
static_configs:
- targets: ["foo:9090"]
`
if err := yaml.Unmarshal([]byte(sTwo), cfg); err != nil {
t.Fatalf("Unable to load YAML config sTwo: %s", err)
}
ts.UpdateProviders(ProvidersFromConfig(*cfg, nil))
<-called
verifyPresence(ts.tgroups, "static/0/0", true)
verifyPresence(ts.tgroups, "static/0/1", false)
}
func TestTargetSetRunsSameTargetProviderMultipleTimes(t *testing.T) {
var wg sync.WaitGroup
wg.Add(2)
ts1 := NewTargetSet(&mockSyncer{
sync: func([]*config.TargetGroup) { wg.Done() },
})
ts2 := NewTargetSet(&mockSyncer{
sync: func([]*config.TargetGroup) { wg.Done() },
})
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
updates := []update{
{
targetGroups: []config.TargetGroup{{Source: "initial1"}, {Source: "initial2"}},
interval: 10,
},
}
tp := newMockTargetProvider(updates)
targetProviders := map[string]TargetProvider{}
targetProviders["testProvider"] = tp
go ts1.Run(ctx)
go ts2.Run(ctx)
ts1.UpdateProviders(targetProviders)
ts2.UpdateProviders(targetProviders)
finalize := make(chan struct{})
go func() {
defer close(finalize)
wg.Wait()
}()
select {
case <-time.After(20 * time.Second):
t.Error("Test timed out after 20 seconds. All targets should be sent within the timeout")
case <-finalize:
if tp.callCount() != 2 {
t.Errorf("Was expecting 2 calls, received %d", tp.callCount())
}
}
}
type mockSyncer struct {
sync func(tgs []*config.TargetGroup)
}
func (s *mockSyncer) Sync(tgs []*config.TargetGroup) {
if s.sync != nil {
s.sync(tgs)
}
}
type update struct {
targetGroups []config.TargetGroup
interval time.Duration
}
type mockTargetProvider struct {
_callCount *int32
updates []update
up chan<- []*config.TargetGroup
}
func newMockTargetProvider(updates []update) mockTargetProvider {
var callCount int32
tp := mockTargetProvider{
_callCount: &callCount,
updates: updates,
}
return tp
}
func (tp mockTargetProvider) Run(ctx context.Context, up chan<- []*config.TargetGroup) {
atomic.AddInt32(tp._callCount, 1)
tp.up = up
tp.sendUpdates()
}
func (tp mockTargetProvider) sendUpdates() {
for _, update := range tp.updates {
time.Sleep(update.interval * time.Millisecond)
tgs := make([]*config.TargetGroup, len(update.targetGroups))
for i := range update.targetGroups {
tgs[i] = &update.targetGroups[i]
}
tp.up <- tgs
}
}
func (tp mockTargetProvider) callCount() int {
return int(atomic.LoadInt32(tp._callCount))
}
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