open-consul/agent/ae/ae_test.go

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package ae
import (
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"errors"
"fmt"
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"reflect"
"sync"
"testing"
"time"
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"github.com/hashicorp/consul/lib"
"github.com/hashicorp/consul/sdk/testutil"
"github.com/hashicorp/go-hclog"
"github.com/stretchr/testify/assert"
)
func TestAE_scaleFactor(t *testing.T) {
t.Parallel()
tests := []struct {
nodes int
scale int
}{
{100, 1},
{200, 2},
{1000, 4},
{10000, 8},
}
for _, tt := range tests {
t.Run(fmt.Sprintf("%d nodes", tt.nodes), func(t *testing.T) {
if got, want := scaleFactor(tt.nodes), tt.scale; got != want {
t.Fatalf("got scale factor %d want %d", got, want)
}
})
}
}
func TestAE_Pause_nestedPauseResume(t *testing.T) {
t.Parallel()
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l := NewStateSyncer(nil, 0, nil, nil)
if l.Paused() != false {
t.Fatal("syncer should be unPaused after init")
}
l.Pause()
if l.Paused() != true {
t.Fatal("syncer should be Paused after first call to Pause()")
}
l.Pause()
if l.Paused() != true {
t.Fatal("syncer should STILL be Paused after second call to Pause()")
}
gotR := l.Resume()
if l.Paused() != true {
t.Fatal("syncer should STILL be Paused after FIRST call to Resume()")
}
assert.False(t, gotR)
gotR = l.Resume()
if l.Paused() != false {
t.Fatal("syncer should NOT be Paused after SECOND call to Resume()")
}
assert.True(t, gotR)
defer func() {
err := recover()
if err == nil {
t.Fatal("unbalanced Resume() should panic")
}
}()
l.Resume()
}
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func TestAE_Pause_ResumeTriggersSyncChanges(t *testing.T) {
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l := NewStateSyncer(nil, 0, nil, nil)
l.Pause()
l.Resume()
select {
case <-l.SyncChanges.Notif():
// expected
case <-l.SyncFull.Notif():
t.Fatal("resume triggered SyncFull instead of SyncChanges")
default:
t.Fatal("resume did not trigger SyncFull")
}
}
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func TestAE_staggerDependsOnClusterSize(t *testing.T) {
libRandomStagger = func(d time.Duration) time.Duration { return d }
defer func() { libRandomStagger = lib.RandomStagger }()
l := testSyncer(t)
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if got, want := l.staggerFn(10*time.Millisecond), 10*time.Millisecond; got != want {
t.Fatalf("got %v want %v", got, want)
}
l.ClusterSize = func() int { return 256 }
if got, want := l.staggerFn(10*time.Millisecond), 20*time.Millisecond; got != want {
t.Fatalf("got %v want %v", got, want)
}
}
func TestAE_Run_SyncFullBeforeChanges(t *testing.T) {
shutdownCh := make(chan struct{})
state := &mock{
syncChanges: func() error {
close(shutdownCh)
return nil
},
}
// indicate that we have partial changes before starting Run
l := testSyncer(t)
l.State = state
l.ShutdownCh = shutdownCh
l.SyncChanges.Trigger()
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
l.Run()
}()
wg.Wait()
if got, want := state.seq, []string{"full", "changes"}; !reflect.DeepEqual(got, want) {
t.Fatalf("got call sequence %v want %v", got, want)
}
}
func TestAE_Run_Quit(t *testing.T) {
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t.Run("Run panics without ClusterSize", func(t *testing.T) {
defer func() {
err := recover()
if err == nil {
t.Fatal("Run should panic")
}
}()
l := testSyncer(t)
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l.ClusterSize = nil
l.Run()
})
t.Run("runFSM quits", func(t *testing.T) {
// start timer which explodes if runFSM does not quit
tm := time.AfterFunc(time.Second, func() { panic("timeout") })
l := testSyncer(t)
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l.runFSM(fullSyncState, func(fsmState) fsmState { return doneState })
// should just quit
tm.Stop()
})
}
func TestAE_FSM(t *testing.T) {
t.Run("fullSyncState", func(t *testing.T) {
t.Run("Paused -> retryFullSyncState", func(t *testing.T) {
l := testSyncer(t)
l.Pause()
fs := l.nextFSMState(fullSyncState)
if got, want := fs, retryFullSyncState; got != want {
t.Fatalf("got state %v want %v", got, want)
}
})
t.Run("SyncFull() error -> retryFullSyncState", func(t *testing.T) {
l := testSyncer(t)
l.State = &mock{syncFull: func() error { return errors.New("boom") }}
fs := l.nextFSMState(fullSyncState)
if got, want := fs, retryFullSyncState; got != want {
t.Fatalf("got state %v want %v", got, want)
}
})
t.Run("SyncFull() OK -> partialSyncState", func(t *testing.T) {
l := testSyncer(t)
l.State = &mock{}
fs := l.nextFSMState(fullSyncState)
if got, want := fs, partialSyncState; got != want {
t.Fatalf("got state %v want %v", got, want)
}
})
})
t.Run("retryFullSyncState", func(t *testing.T) {
// helper for testing state transitions from retrySyncFullState
test := func(ev event, to fsmState) {
l := testSyncer(t)
l.retrySyncFullEvent = func() event { return ev }
fs := l.nextFSMState(retryFullSyncState)
if got, want := fs, to; got != want {
t.Fatalf("got state %v want %v", got, want)
}
}
t.Run("shutdownEvent -> doneState", func(t *testing.T) {
test(shutdownEvent, doneState)
})
t.Run("syncFullNotifEvent -> fullSyncState", func(t *testing.T) {
test(syncFullNotifEvent, fullSyncState)
})
t.Run("syncFullTimerEvent -> fullSyncState", func(t *testing.T) {
test(syncFullTimerEvent, fullSyncState)
})
t.Run("invalid event -> panic ", func(t *testing.T) {
defer func() {
err := recover()
if err == nil {
t.Fatal("invalid event should panic")
}
}()
test(event("invalid"), fsmState(""))
})
})
t.Run("partialSyncState", func(t *testing.T) {
// helper for testing state transitions from partialSyncState
test := func(ev event, to fsmState) {
l := testSyncer(t)
l.syncChangesEvent = func() event { return ev }
fs := l.nextFSMState(partialSyncState)
if got, want := fs, to; got != want {
t.Fatalf("got state %v want %v", got, want)
}
}
t.Run("shutdownEvent -> doneState", func(t *testing.T) {
test(shutdownEvent, doneState)
})
t.Run("syncFullNotifEvent -> fullSyncState", func(t *testing.T) {
test(syncFullNotifEvent, fullSyncState)
})
t.Run("syncFullTimerEvent -> fullSyncState", func(t *testing.T) {
test(syncFullTimerEvent, fullSyncState)
})
t.Run("syncChangesEvent+Paused -> partialSyncState", func(t *testing.T) {
l := testSyncer(t)
l.Pause()
l.syncChangesEvent = func() event { return syncChangesNotifEvent }
fs := l.nextFSMState(partialSyncState)
if got, want := fs, partialSyncState; got != want {
t.Fatalf("got state %v want %v", got, want)
}
})
t.Run("syncChangesEvent+SyncChanges() error -> partialSyncState", func(t *testing.T) {
l := testSyncer(t)
l.State = &mock{syncChanges: func() error { return errors.New("boom") }}
l.syncChangesEvent = func() event { return syncChangesNotifEvent }
fs := l.nextFSMState(partialSyncState)
if got, want := fs, partialSyncState; got != want {
t.Fatalf("got state %v want %v", got, want)
}
})
t.Run("syncChangesEvent+SyncChanges() OK -> partialSyncState", func(t *testing.T) {
l := testSyncer(t)
l.State = &mock{}
l.syncChangesEvent = func() event { return syncChangesNotifEvent }
fs := l.nextFSMState(partialSyncState)
if got, want := fs, partialSyncState; got != want {
t.Fatalf("got state %v want %v", got, want)
}
})
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t.Run("invalid event -> panic ", func(t *testing.T) {
defer func() {
err := recover()
if err == nil {
t.Fatal("invalid event should panic")
}
}()
test(event("invalid"), fsmState(""))
})
})
t.Run("invalid state -> panic ", func(t *testing.T) {
defer func() {
err := recover()
if err == nil {
t.Fatal("invalid state should panic")
}
}()
l := testSyncer(t)
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l.nextFSMState(fsmState("invalid"))
})
}
func TestAE_RetrySyncFullEvent(t *testing.T) {
if testing.Short() {
t.Skip("too slow for testing.Short")
}
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t.Run("trigger shutdownEvent", func(t *testing.T) {
l := testSyncer(t)
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l.ShutdownCh = make(chan struct{})
evch := make(chan event)
go func() { evch <- l.retrySyncFullEvent() }()
close(l.ShutdownCh)
if got, want := <-evch, shutdownEvent; got != want {
t.Fatalf("got event %q want %q", got, want)
}
})
t.Run("trigger shutdownEvent during FullNotif", func(t *testing.T) {
l := testSyncer(t)
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l.ShutdownCh = make(chan struct{})
evch := make(chan event)
go func() { evch <- l.retrySyncFullEvent() }()
l.SyncFull.Trigger()
time.Sleep(100 * time.Millisecond)
close(l.ShutdownCh)
if got, want := <-evch, shutdownEvent; got != want {
t.Fatalf("got event %q want %q", got, want)
}
})
t.Run("trigger syncFullNotifEvent", func(t *testing.T) {
l := testSyncer(t)
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l.serverUpInterval = 10 * time.Millisecond
evch := make(chan event)
go func() { evch <- l.retrySyncFullEvent() }()
l.SyncFull.Trigger()
if got, want := <-evch, syncFullNotifEvent; got != want {
t.Fatalf("got event %q want %q", got, want)
}
})
t.Run("trigger syncFullTimerEvent", func(t *testing.T) {
l := testSyncer(t)
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l.retryFailInterval = 10 * time.Millisecond
evch := make(chan event)
go func() { evch <- l.retrySyncFullEvent() }()
if got, want := <-evch, syncFullTimerEvent; got != want {
t.Fatalf("got event %q want %q", got, want)
}
})
}
func TestAE_SyncChangesEvent(t *testing.T) {
if testing.Short() {
t.Skip("too slow for testing.Short")
}
t.Run("trigger shutdownEvent", func(t *testing.T) {
l := testSyncer(t)
l.ShutdownCh = make(chan struct{})
evch := make(chan event)
go func() { evch <- l.syncChangesEvent() }()
close(l.ShutdownCh)
if got, want := <-evch, shutdownEvent; got != want {
t.Fatalf("got event %q want %q", got, want)
}
})
t.Run("trigger shutdownEvent during FullNotif", func(t *testing.T) {
l := testSyncer(t)
l.ShutdownCh = make(chan struct{})
evch := make(chan event)
go func() { evch <- l.syncChangesEvent() }()
l.SyncFull.Trigger()
time.Sleep(100 * time.Millisecond)
close(l.ShutdownCh)
if got, want := <-evch, shutdownEvent; got != want {
t.Fatalf("got event %q want %q", got, want)
}
})
t.Run("trigger syncFullNotifEvent", func(t *testing.T) {
l := testSyncer(t)
l.serverUpInterval = 10 * time.Millisecond
evch := make(chan event)
go func() { evch <- l.syncChangesEvent() }()
l.SyncFull.Trigger()
if got, want := <-evch, syncFullNotifEvent; got != want {
t.Fatalf("got event %q want %q", got, want)
}
})
t.Run("trigger syncFullTimerEvent", func(t *testing.T) {
l := testSyncer(t)
l.Interval = 10 * time.Millisecond
evch := make(chan event)
go func() { evch <- l.syncChangesEvent() }()
if got, want := <-evch, syncFullTimerEvent; got != want {
t.Fatalf("got event %q want %q", got, want)
}
})
t.Run("trigger syncChangesNotifEvent", func(t *testing.T) {
l := testSyncer(t)
evch := make(chan event)
go func() { evch <- l.syncChangesEvent() }()
l.SyncChanges.Trigger()
if got, want := <-evch, syncChangesNotifEvent; got != want {
t.Fatalf("got event %q want %q", got, want)
}
})
}
type mock struct {
seq []string
syncFull, syncChanges func() error
}
func (m *mock) SyncFull() error {
m.seq = append(m.seq, "full")
if m.syncFull != nil {
return m.syncFull()
}
return nil
}
func (m *mock) SyncChanges() error {
m.seq = append(m.seq, "changes")
if m.syncChanges != nil {
return m.syncChanges()
}
return nil
}
func testSyncer(t *testing.T) *StateSyncer {
logger := hclog.New(&hclog.LoggerOptions{
Level: 0,
testutil: NewLogBuffer - buffer logs until a test fails Replaces #7559 Running tests in parallel, with background goroutines, results in test output not being associated with the correct test. `go test` does not make any guarantees about output from goroutines being attributed to the correct test case. Attaching log output from background goroutines also cause data races. If the goroutine outlives the test, it will race with the test being marked done. Previously this was noticed as a panic when logging, but with the race detector enabled it is shown as a data race. The previous solution did not address the problem of correct test attribution because test output could still be hidden when it was associated with a test that did not fail. You would have to look at all of the log output to find the relevant lines. It also made debugging test failures more difficult because each log line was very long. This commit attempts a new approach. Instead of printing all the logs, only print when a test fails. This should work well when there are a small number of failures, but may not work well when there are many test failures at the same time. In those cases the failures are unlikely a result of a specific test, and the log output is likely less useful. All of the logs are printed from the test goroutine, so they should be associated with the correct test. Also removes some test helpers that were not used, or only had a single caller. Packages which expose many functions with similar names can be difficult to use correctly. Related: https://github.com/golang/go/issues/38458 (may be fixed in go1.15) https://github.com/golang/go/issues/38382#issuecomment-612940030
2020-05-06 20:40:16 +00:00
Output: testutil.NewLogBuffer(t),
})
l := NewStateSyncer(nil, time.Second, nil, logger)
l.stagger = func(d time.Duration) time.Duration { return d }
l.ClusterSize = func() int { return 1 }
l.resetNextFullSyncCh()
return l
}